[PATCH] sched: cleanup, remove task_t, convert to struct task_struct

cleanup: remove task_t and convert all the uses to struct task_struct. I
introduced it for the scheduler anno and it was a mistake.

Conversion was mostly scripted, the result was reviewed and all
secondary whitespace and style impact (if any) was fixed up by hand.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

25 files changed, 203 insertions, 187 deletions

diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c
index 01c8c8b2333..41ebf51a107 100644
--- a/arch/alpha/kernel/process.c
+++ b/arch/alpha/kernel/process.c
@@ -474,7 +474,7 @@ out:
  */
 
 unsigned long
-thread_saved_pc(task_t *t)
+thread_saved_pc(struct task_struct *t)
 {
 	unsigned long base = (unsigned long)task_stack_page(t);
 	unsigned long fp, sp = task_thread_info(t)->pcb.ksp;
diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
index eb8e8dc5ac8..2fbe4536fe1 100644
--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -678,7 +678,7 @@ copy_reg(const u64 *fr, u64 fnat, u64 *tr, u64 *tnat)
  */
 
 static void
-ia64_mca_modify_comm(const task_t *previous_current)
+ia64_mca_modify_comm(const struct task_struct *previous_current)
 {
 	char *p, comm[sizeof(current->comm)];
 	if (previous_current->pid)
@@ -709,7 +709,7 @@ ia64_mca_modify_comm(const task_t *previous_current)
  * that we can do backtrace on the MCA/INIT handler code itself.
  */
 
-static task_t *
+static struct task_struct *
 ia64_mca_modify_original_stack(struct pt_regs *regs,
 		const struct switch_stack *sw,
 		struct ia64_sal_os_state *sos,
@@ -719,7 +719,7 @@ ia64_mca_modify_original_stack(struct pt_regs *regs,
 	ia64_va va;
 	extern char ia64_leave_kernel[];	/* Need asm address, not function descriptor */
 	const pal_min_state_area_t *ms = sos->pal_min_state;
-	task_t *previous_current;
+	struct task_struct *previous_current;
 	struct pt_regs *old_regs;
 	struct switch_stack *old_sw;
 	unsigned size = sizeof(struct pt_regs) +
@@ -1023,7 +1023,7 @@ ia64_mca_handler(struct pt_regs *regs, struct switch_stack *sw,
 	pal_processor_state_info_t *psp = (pal_processor_state_info_t *)
 		&sos->proc_state_param;
 	int recover, cpu = smp_processor_id();
-	task_t *previous_current;
+	struct task_struct *previous_current;
 	struct ia64_mca_notify_die nd =
 		{ .sos = sos, .monarch_cpu = &monarch_cpu };
 
@@ -1352,7 +1352,7 @@ ia64_init_handler(struct pt_regs *regs, struct switch_stack *sw,
 {
 	static atomic_t slaves;
 	static atomic_t monarchs;
-	task_t *previous_current;
+	struct task_struct *previous_current;
 	int cpu = smp_processor_id();
 	struct ia64_mca_notify_die nd =
 		{ .sos = sos, .monarch_cpu = &monarch_cpu };
diff --git a/arch/ia64/kernel/smpboot.c b/arch/ia64/kernel/smpboot.c
index e1960979be2..6203ed4ec8c 100644
--- a/arch/ia64/kernel/smpboot.c
+++ b/arch/ia64/kernel/smpboot.c
@@ -124,7 +124,7 @@ extern void __devinit calibrate_delay (void);
 extern void start_ap (void);
 extern unsigned long ia64_iobase;
 
-task_t *task_for_booting_cpu;
+struct task_struct *task_for_booting_cpu;
 
 /*
  * State for each CPU
diff --git a/arch/mips/kernel/entry.S b/arch/mips/kernel/entry.S
index ecfd637d702..01e7fa86aa4 100644
--- a/arch/mips/kernel/entry.S
+++ b/arch/mips/kernel/entry.S
@@ -65,7 +65,7 @@ need_resched:
 #endif
 
 FEXPORT(ret_from_fork)
-	jal	schedule_tail		# a0 = task_t *prev
+	jal	schedule_tail		# a0 = struct task_struct *prev
 
 FEXPORT(syscall_exit)
 	local_irq_disable		# make sure need_resched and
diff --git a/arch/mips/kernel/mips-mt.c b/arch/mips/kernel/mips-mt.c
index 02237a685ec..4dcc39f4295 100644
--- a/arch/mips/kernel/mips-mt.c
+++ b/arch/mips/kernel/mips-mt.c
@@ -47,7 +47,7 @@ unsigned long mt_fpemul_threshold = 0;
  * used in sys_sched_set/getaffinity() in kernel/sched.c, so
  * cloned here.
  */
-static inline task_t *find_process_by_pid(pid_t pid)
+static inline struct task_struct *find_process_by_pid(pid_t pid)
 {
 	return pid ? find_task_by_pid(pid) : current;
 }
@@ -62,7 +62,7 @@ asmlinkage long mipsmt_sys_sched_setaffinity(pid_t pid, unsigned int len,
 	cpumask_t new_mask;
 	cpumask_t effective_mask;
 	int retval;
-	task_t *p;
+	struct task_struct *p;
 
 	if (len < sizeof(new_mask))
 		return -EINVAL;
@@ -127,7 +127,7 @@ asmlinkage long mipsmt_sys_sched_getaffinity(pid_t pid, unsigned int len,
 	unsigned int real_len;
 	cpumask_t mask;
 	int retval;
-	task_t *p;
+	struct task_struct *p;
 
 	real_len = sizeof(mask);
 	if (len < real_len)
diff --git a/arch/um/kernel/tt/process_kern.c b/arch/um/kernel/tt/process_kern.c
index a9c1443fc54..8368c2dbe63 100644
--- a/arch/um/kernel/tt/process_kern.c
+++ b/arch/um/kernel/tt/process_kern.c
@@ -119,7 +119,7 @@ void suspend_new_thread(int fd)
 		panic("read failed in suspend_new_thread, err = %d", -err);
 }
 
-void schedule_tail(task_t *prev);
+void schedule_tail(struct task_struct *prev);
 
 static void new_thread_handler(int sig)
 {
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index 6fb77952562..bfdb90242a9 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -2336,7 +2336,7 @@ static int fionbio(struct file *file, int __user *p)
 
 static int tiocsctty(struct tty_struct *tty, int arg)
 {
-	task_t *p;
+	struct task_struct *p;
 
 	if (current->signal->leader &&
 	    (current->signal->session == tty->session))
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 9c677bbd0b0..19ffb043abb 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -120,7 +120,7 @@ struct epoll_filefd {
  */
 struct wake_task_node {
 	struct list_head llink;
-	task_t *task;
+	struct task_struct *task;
 	wait_queue_head_t *wq;
 };
 
@@ -413,7 +413,7 @@ static void ep_poll_safewake(struct poll_safewake *psw, wait_queue_head_t *wq)
 {
 	int wake_nests = 0;
 	unsigned long flags;
-	task_t *this_task = current;
+	struct task_struct *this_task = current;
 	struct list_head *lsthead = &psw->wake_task_list, *lnk;
 	struct wake_task_node *tncur;
 	struct wake_task_node tnode;
diff --git a/include/asm-ia64/thread_info.h b/include/asm-ia64/thread_info.h
index 8bc9869e576..8adcde0934c 100644
--- a/include/asm-ia64/thread_info.h
+++ b/include/asm-ia64/thread_info.h
@@ -68,7 +68,7 @@ struct thread_info {
 #define end_of_stack(p) (unsigned long *)((void *)(p) + IA64_RBS_OFFSET)
 
 #define __HAVE_ARCH_TASK_STRUCT_ALLOCATOR
-#define alloc_task_struct()	((task_t *)__get_free_pages(GFP_KERNEL | __GFP_COMP, KERNEL_STACK_SIZE_ORDER))
+#define alloc_task_struct()	((struct task_struct *)__get_free_pages(GFP_KERNEL | __GFP_COMP, KERNEL_STACK_SIZE_ORDER))
 #define free_task_struct(tsk)	free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER)
 
 #endif /* !__ASSEMBLY */
diff --git a/include/asm-m32r/system.h b/include/asm-m32r/system.h
index 66c4742f09e..311cebf44ef 100644
--- a/include/asm-m32r/system.h
+++ b/include/asm-m32r/system.h
@@ -18,7 +18,7 @@
  * switch_to(prev, next) should switch from task `prev' to `next'
  * `prev' will never be the same as `next'.
  *
- * `next' and `prev' should be task_t, but it isn't always defined
+ * `next' and `prev' should be struct task_struct, but it isn't always defined
  */
 
 #define switch_to(prev, next, last)  do { \
diff --git a/include/asm-sh/system.h b/include/asm-sh/system.h
index b752e5cbb83..ce2e60664a8 100644
--- a/include/asm-sh/system.h
+++ b/include/asm-sh/system.h
@@ -12,7 +12,7 @@
  */
 
 #define switch_to(prev, next, last) do {				\
- task_t *__last;							\
+ struct task_struct *__last;						\
  register unsigned long *__ts1 __asm__ ("r1") = &prev->thread.sp;	\
  register unsigned long *__ts2 __asm__ ("r2") = &prev->thread.pc;	\
  register unsigned long *__ts4 __asm__ ("r4") = (unsigned long *)prev;	\
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 8ebddba4448..c2797f04d93 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -184,11 +184,11 @@ extern unsigned long weighted_cpuload(const int cpu);
 extern rwlock_t tasklist_lock;
 extern spinlock_t mmlist_lock;
 
-typedef struct task_struct task_t;
+struct task_struct;
 
 extern void sched_init(void);
 extern void sched_init_smp(void);
-extern void init_idle(task_t *idle, int cpu);
+extern void init_idle(struct task_struct *idle, int cpu);
 
 extern cpumask_t nohz_cpu_mask;
 
@@ -383,7 +383,7 @@ struct signal_struct {
 	wait_queue_head_t	wait_chldexit;	/* for wait4() */
 
 	/* current thread group signal load-balancing target: */
-	task_t			*curr_target;
+	struct task_struct	*curr_target;
 
 	/* shared signal handling: */
 	struct sigpending	shared_pending;
@@ -699,7 +699,7 @@ extern int groups_search(struct group_info *group_info, gid_t grp);
     ((gi)->blocks[(i)/NGROUPS_PER_BLOCK][(i)%NGROUPS_PER_BLOCK])
 
 #ifdef ARCH_HAS_PREFETCH_SWITCH_STACK
-extern void prefetch_stack(struct task_struct*);
+extern void prefetch_stack(struct task_struct *t);
 #else
 static inline void prefetch_stack(struct task_struct *t) { }
 #endif
@@ -1031,9 +1031,9 @@ static inline void put_task_struct(struct task_struct *t)
 #define used_math() tsk_used_math(current)
 
 #ifdef CONFIG_SMP
-extern int set_cpus_allowed(task_t *p, cpumask_t new_mask);
+extern int set_cpus_allowed(struct task_struct *p, cpumask_t new_mask);
 #else
-static inline int set_cpus_allowed(task_t *p, cpumask_t new_mask)
+static inline int set_cpus_allowed(struct task_struct *p, cpumask_t new_mask)
 {
 	if (!cpu_isset(0, new_mask))
 		return -EINVAL;
@@ -1042,7 +1042,8 @@ static inline int set_cpus_allowed(task_t *p, cpumask_t new_mask)
 #endif
 
 extern unsigned long long sched_clock(void);
-extern unsigned long long current_sched_time(const task_t *current_task);
+extern unsigned long long
+current_sched_time(const struct task_struct *current_task);
 
 /* sched_exec is called by processes performing an exec */
 #ifdef CONFIG_SMP
@@ -1060,27 +1061,27 @@ static inline void idle_task_exit(void) {}
 extern void sched_idle_next(void);
 
 #ifdef CONFIG_RT_MUTEXES
-extern int rt_mutex_getprio(task_t *p);
-extern void rt_mutex_setprio(task_t *p, int prio);
-extern void rt_mutex_adjust_pi(task_t *p);
+extern int rt_mutex_getprio(struct task_struct *p);
+extern void rt_mutex_setprio(struct task_struct *p, int prio);
+extern void rt_mutex_adjust_pi(struct task_struct *p);
 #else
-static inline int rt_mutex_getprio(task_t *p)
+static inline int rt_mutex_getprio(struct task_struct *p)
 {
 	return p->normal_prio;
 }
 # define rt_mutex_adjust_pi(p)		do { } while (0)
 #endif
 
-extern void set_user_nice(task_t *p, long nice);
-extern int task_prio(const task_t *p);
-extern int task_nice(const task_t *p);
-extern int can_nice(const task_t *p, const int nice);
-extern int task_curr(const task_t *p);
+extern void set_user_nice(struct task_struct *p, long nice);
+extern int task_prio(const struct task_struct *p);
+extern int task_nice(const struct task_struct *p);
+extern int can_nice(const struct task_struct *p, const int nice);
+extern int task_curr(const struct task_struct *p);
 extern int idle_cpu(int cpu);
 extern int sched_setscheduler(struct task_struct *, int, struct sched_param *);
-extern task_t *idle_task(int cpu);
-extern task_t *curr_task(int cpu);
-extern void set_curr_task(int cpu, task_t *p);
+extern struct task_struct *idle_task(int cpu);
+extern struct task_struct *curr_task(int cpu);
+extern void set_curr_task(int cpu, struct task_struct *p);
 
 void yield(void);
 
@@ -1137,8 +1138,8 @@ extern void FASTCALL(wake_up_new_task(struct task_struct * tsk,
 #else
  static inline void kick_process(struct task_struct *tsk) { }
 #endif
-extern void FASTCALL(sched_fork(task_t * p, int clone_flags));
-extern void FASTCALL(sched_exit(task_t * p));
+extern void FASTCALL(sched_fork(struct task_struct * p, int clone_flags));
+extern void FASTCALL(sched_exit(struct task_struct * p));
 
 extern int in_group_p(gid_t);
 extern int in_egroup_p(gid_t);
@@ -1243,17 +1244,17 @@ extern NORET_TYPE void do_group_exit(int);
 extern void daemonize(const char *, ...);
 extern int allow_signal(int);
 extern int disallow_signal(int);
-extern task_t *child_reaper;
+extern struct task_struct *child_reaper;
 
 extern int do_execve(char *, char __user * __user *, char __user * __user *, struct pt_regs *);
 extern long do_fork(unsigned long, unsigned long, struct pt_regs *, unsigned long, int __user *, int __user *);
-task_t *fork_idle(int);
+struct task_struct *fork_idle(int);
 
 extern void set_task_comm(struct task_struct *tsk, char *from);
 extern void get_task_comm(char *to, struct task_struct *tsk);
 
 #ifdef CONFIG_SMP
-extern void wait_task_inactive(task_t * p);
+extern void wait_task_inactive(struct task_struct * p);
 #else
 #define wait_task_inactive(p)	do { } while (0)
 #endif
@@ -1279,13 +1280,13 @@ extern void wait_task_inactive(task_t * p);
 /* de_thread depends on thread_group_leader not being a pid based check */
 #define thread_group_leader(p)	(p == p->group_leader)
 
-static inline task_t *next_thread(const task_t *p)
+static inline struct task_struct *next_thread(const struct task_struct *p)
 {
 	return list_entry(rcu_dereference(p->thread_group.next),
-				task_t, thread_group);
+			  struct task_struct, thread_group);
 }
 
-static inline int thread_group_empty(task_t *p)
+static inline int thread_group_empty(struct task_struct *p)
 {
 	return list_empty(&p->thread_group);
 }
diff --git a/kernel/capability.c b/kernel/capability.c
index 1a4d8a40d3f..c7685ad00a9 100644
--- a/kernel/capability.c
+++ b/kernel/capability.c
@@ -46,7 +46,7 @@ asmlinkage long sys_capget(cap_user_header_t header, cap_user_data_t dataptr)
      int ret = 0;
      pid_t pid;
      __u32 version;
-     task_t *target;
+     struct task_struct *target;
      struct __user_cap_data_struct data;
 
      if (get_user(version, &header->version))
@@ -96,7 +96,7 @@ static inline int cap_set_pg(int pgrp, kernel_cap_t *effective,
 			      kernel_cap_t *inheritable,
 			      kernel_cap_t *permitted)
 {
-	task_t *g, *target;
+	struct task_struct *g, *target;
 	int ret = -EPERM;
 	int found = 0;
 
@@ -128,7 +128,7 @@ static inline int cap_set_all(kernel_cap_t *effective,
 			       kernel_cap_t *inheritable,
 			       kernel_cap_t *permitted)
 {
-     task_t *g, *target;
+     struct task_struct *g, *target;
      int ret = -EPERM;
      int found = 0;
 
@@ -172,7 +172,7 @@ asmlinkage long sys_capset(cap_user_header_t header, const cap_user_data_t data)
 {
      kernel_cap_t inheritable, permitted, effective;
      __u32 version;
-     task_t *target;
+     struct task_struct *target;
      int ret;
      pid_t pid;
 
diff --git a/kernel/exit.c b/kernel/exit.c
index c595db14cf2..6664c084783 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -134,8 +134,8 @@ static void delayed_put_task_struct(struct rcu_head *rhp)
 
 void release_task(struct task_struct * p)
 {
+	struct task_struct *leader;
 	int zap_leader;
-	task_t *leader;
 repeat:
 	atomic_dec(&p->user->processes);
 	write_lock_irq(&tasklist_lock);
@@ -209,7 +209,7 @@ out:
  *
  * "I ask you, have you ever known what it is to be an orphan?"
  */
-static int will_become_orphaned_pgrp(int pgrp, task_t *ignored_task)
+static int will_become_orphaned_pgrp(int pgrp, struct task_struct *ignored_task)
 {
 	struct task_struct *p;
 	int ret = 1;
@@ -582,7 +582,8 @@ static void exit_mm(struct task_struct * tsk)
 	mmput(mm);
 }
 
-static inline void choose_new_parent(task_t *p, task_t *reaper)
+static inline void
+choose_new_parent(struct task_struct *p, struct task_struct *reaper)
 {
 	/*
 	 * Make sure we're not reparenting to ourselves and that
@@ -592,7 +593,8 @@ static inline void choose_new_parent(task_t *p, task_t *reaper)
 	p->real_parent = reaper;
 }
 
-static void reparent_thread(task_t *p, task_t *father, int traced)
+static void
+reparent_thread(struct task_struct *p, struct task_struct *father, int traced)
 {
 	/* We don't want people slaying init.  */
 	if (p->exit_signal != -1)
@@ -656,8 +658,8 @@ static void reparent_thread(task_t *p, task_t *father, int traced)
  * group, and if no such member exists, give it to
  * the global child reaper process (ie "init")
  */
-static void forget_original_parent(struct task_struct * father,
-					  struct list_head *to_release)
+static void
+forget_original_parent(struct task_struct *father, struct list_head *to_release)
 {
 	struct task_struct *p, *reaper = father;
 	struct list_head *_p, *_n;
@@ -680,7 +682,7 @@ static void forget_original_parent(struct task_struct * father,
 	 */
 	list_for_each_safe(_p, _n, &father->children) {
 		int ptrace;
-		p = list_entry(_p,struct task_struct,sibling);
+		p = list_entry(_p, struct task_struct, sibling);
 
 		ptrace = p->ptrace;
 
@@ -709,7 +711,7 @@ static void forget_original_parent(struct task_struct * father,
 			list_add(&p->ptrace_list, to_release);
 	}
 	list_for_each_safe(_p, _n, &father->ptrace_children) {
-		p = list_entry(_p,struct task_struct,ptrace_list);
+		p = list_entry(_p, struct task_struct, ptrace_list);
 		choose_new_parent(p, reaper);
 		reparent_thread(p, father, 1);
 	}
@@ -829,7 +831,7 @@ static void exit_notify(struct task_struct *tsk)
 
 	list_for_each_safe(_p, _n, &ptrace_dead) {
 		list_del_init(_p);
-		t = list_entry(_p,struct task_struct,ptrace_list);
+		t = list_entry(_p, struct task_struct, ptrace_list);
 		release_task(t);
 	}
 
@@ -1010,7 +1012,7 @@ asmlinkage void sys_exit_group(int error_code)
 	do_group_exit((error_code & 0xff) << 8);
 }
 
-static int eligible_child(pid_t pid, int options, task_t *p)
+static int eligible_child(pid_t pid, int options, struct task_struct *p)
 {
 	if (pid > 0) {
 		if (p->pid != pid)
@@ -1051,12 +1053,13 @@ static int eligible_child(pid_t pid, int options, task_t *p)
 	return 1;
 }
 
-static int wait_noreap_copyout(task_t *p, pid_t pid, uid_t uid,
+static int wait_noreap_copyout(struct task_struct *p, pid_t pid, uid_t uid,
 			       int why, int status,
 			       struct siginfo __user *infop,
 			       struct rusage __user *rusagep)
 {
 	int retval = rusagep ? getrusage(p, RUSAGE_BOTH, rusagep) : 0;
+
 	put_task_struct(p);
 	if (!retval)
 		retval = put_user(SIGCHLD, &infop->si_signo);
@@ -1081,7 +1084,7 @@ static int wait_noreap_copyout(task_t *p, pid_t pid, uid_t uid,
  * the lock and this task is uninteresting.  If we return nonzero, we have
  * released the lock and the system call should return.
  */
-static int wait_task_zombie(task_t *p, int noreap,
+static int wait_task_zombie(struct task_struct *p, int noreap,
 			    struct siginfo __user *infop,
 			    int __user *stat_addr, struct rusage __user *ru)
 {
@@ -1243,8 +1246,8 @@ static int wait_task_zombie(task_t *p, int noreap,
  * the lock and this task is uninteresting.  If we return nonzero, we have
  * released the lock and the system call should return.
  */
-static int wait_task_stopped(task_t *p, int delayed_group_leader, int noreap,
-			     struct siginfo __user *infop,
+static int wait_task_stopped(struct task_struct *p, int delayed_group_leader,
+			     int noreap, struct siginfo __user *infop,
 			     int __user *stat_addr, struct rusage __user *ru)
 {
 	int retval, exit_code;
@@ -1358,7 +1361,7 @@ bail_ref:
  * the lock and this task is uninteresting.  If we return nonzero, we have
  * released the lock and the system call should return.
  */
-static int wait_task_continued(task_t *p, int noreap,
+static int wait_task_continued(struct task_struct *p, int noreap,
 			       struct siginfo __user *infop,
 			       int __user *stat_addr, struct rusage __user *ru)
 {
@@ -1444,7 +1447,7 @@ repeat:
 		int ret;
 
 		list_for_each(_p,&tsk->children) {
-			p = list_entry(_p,struct task_struct,sibling);
+			p = list_entry(_p, struct task_struct, sibling);
 
 			ret = eligible_child(pid, options, p);
 			if (!ret)
diff --git a/kernel/fork.c b/kernel/fork.c
index 54953d8a6f1..56e4e07e45f 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -933,13 +933,13 @@ static inline void rt_mutex_init_task(struct task_struct *p)
  * parts of the process environment (as per the clone
  * flags). The actual kick-off is left to the caller.
  */
-static task_t *copy_process(unsigned long clone_flags,
-				 unsigned long stack_start,
-				 struct pt_regs *regs,
-				 unsigned long stack_size,
-				 int __user *parent_tidptr,
-				 int __user *child_tidptr,
-				 int pid)
+static struct task_struct *copy_process(unsigned long clone_flags,
+					unsigned long stack_start,
+					struct pt_regs *regs,
+					unsigned long stack_size,
+					int __user *parent_tidptr,
+					int __user *child_tidptr,
+					int pid)
 {
 	int retval;
 	struct task_struct *p = NULL;
@@ -1294,9 +1294,9 @@ struct pt_regs * __devinit __attribute__((weak)) idle_regs(struct pt_regs *regs)
 	return regs;
 }
 
-task_t * __devinit fork_idle(int cpu)
+struct task_struct * __devinit fork_idle(int cpu)
 {
-	task_t *task;
+	struct task_struct *task;
 	struct pt_regs regs;
 
 	task = copy_process(CLONE_VM, 0, idle_regs(&regs), 0, NULL, NULL, 0);
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 617304ce67d..d17766d40da 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -669,7 +669,7 @@ static int hrtimer_wakeup(struct hrtimer *timer)
 	return HRTIMER_NORESTART;
 }
 
-void hrtimer_init_sleeper(struct hrtimer_sleeper *sl, task_t *task)
+void hrtimer_init_sleeper(struct hrtimer_sleeper *sl, struct task_struct *task)
 {
 	sl->timer.function = hrtimer_wakeup;
 	sl->task = task;
diff --git a/kernel/pid.c b/kernel/pid.c
index eeb836b65ca..93e212f2067 100644
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -218,7 +218,7 @@ struct pid * fastcall find_pid(int nr)
 	return NULL;
 }
 
-int fastcall attach_pid(task_t *task, enum pid_type type, int nr)
+int fastcall attach_pid(struct task_struct *task, enum pid_type type, int nr)
 {
 	struct pid_link *link;
 	struct pid *pid;
@@ -233,7 +233,7 @@ int fastcall attach_pid(task_t *task, enum pid_type type, int nr)
 	return 0;
 }
 
-void fastcall detach_pid(task_t *task, enum pid_type type)
+void fastcall detach_pid(struct task_struct *task, enum pid_type type)
 {
 	struct pid_link *link;
 	struct pid *pid;
@@ -267,7 +267,7 @@ struct task_struct * fastcall pid_task(struct pid *pid, enum pid_type type)
 /*
  * Must be called under rcu_read_lock() or with tasklist_lock read-held.
  */
-task_t *find_task_by_pid_type(int type, int nr)
+struct task_struct *find_task_by_pid_type(int type, int nr)
 {
 	return pid_task(find_pid(nr), type);
 }
diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 335c5b932e1..9a111f70145 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -28,7 +28,7 @@
  *
  * Must be called with the tasklist lock write-held.
  */
-void __ptrace_link(task_t *child, task_t *new_parent)
+void __ptrace_link(struct task_struct *child, struct task_struct *new_parent)
 {
 	BUG_ON(!list_empty(&child->ptrace_list));
 	if (child->parent == new_parent)
@@ -46,7 +46,7 @@ void __ptrace_link(task_t *child, task_t *new_parent)
  * TASK_TRACED, resume it now.
  * Requires that irqs be disabled.
  */
-void ptrace_untrace(task_t *child)
+void ptrace_untrace(struct task_struct *child)
 {
 	spin_lock(&child->sighand->siglock);
 	if (child->state == TASK_TRACED) {
@@ -65,7 +65,7 @@ void ptrace_untrace(task_t *child)
  *
  * Must be called with the tasklist lock write-held.
  */
-void __ptrace_unlink(task_t *child)
+void __ptrace_unlink(struct task_struct *child)
 {
 	BUG_ON(!child->ptrace);
 
diff --git a/kernel/rtmutex-debug.c b/kernel/rtmutex-debug.c
index 353a853bc39..0c1faa950af 100644
--- a/kernel/rtmutex-debug.c
+++ b/kernel/rtmutex-debug.c
@@ -96,7 +96,7 @@ void deadlock_trace_off(void)
 	rt_trace_on = 0;
 }
 
-static void printk_task(task_t *p)
+static void printk_task(struct task_struct *p)
 {
 	if (p)
 		printk("%16s:%5d [%p, %3d]", p->comm, p->pid, p, p->prio);
@@ -231,7 +231,8 @@ void debug_rt_mutex_init(struct rt_mutex *lock, const char *name)
 	lock->name = name;
 }
 
-void rt_mutex_deadlock_account_lock(struct rt_mutex *lock, task_t *task)
+void
+rt_mutex_deadlock_account_lock(struct rt_mutex *lock, struct task_struct *task)
 {
 }
 
diff --git a/kernel/rtmutex-tester.c b/kernel/rtmutex-tester.c
index e82c2f84824..494dac872a1 100644
--- a/kernel/rtmutex-tester.c
+++ b/kernel/rtmutex-tester.c
@@ -33,7 +33,7 @@ struct test_thread_data {
 };
 
 static struct test_thread_data thread_data[MAX_RT_TEST_THREADS];
-static task_t *threads[MAX_RT_TEST_THREADS];
+static struct task_struct *threads[MAX_RT_TEST_THREADS];
 static struct rt_mutex mutexes[MAX_RT_TEST_MUTEXES];
 
 enum test_opcodes {
@@ -361,8 +361,8 @@ static ssize_t sysfs_test_command(struct sys_device *dev, const char *buf,
 static ssize_t sysfs_test_status(struct sys_device *dev, char *buf)
 {
 	struct test_thread_data *td;
+	struct task_struct *tsk;
 	char *curr = buf;
-	task_t *tsk;
 	int i;
 
 	td = container_of(dev, struct test_thread_data, sysdev);
diff --git a/kernel/rtmutex.c b/kernel/rtmutex.c
index 91b699aa658..d2ef13b485e 100644
--- a/kernel/rtmutex.c
+++ b/kernel/rtmutex.c
@@ -157,7 +157,7 @@ int max_lock_depth = 1024;
  * Decreases task's usage by one - may thus free the task.
  * Returns 0 or -EDEADLK.
  */
-static int rt_mutex_adjust_prio_chain(task_t *task,
+static int rt_mutex_adjust_prio_chain(struct task_struct *task,
 				      int deadlock_detect,
 				      struct rt_mutex *orig_lock,
 				      struct rt_mutex_waiter *orig_waiter,
@@ -282,6 +282,7 @@ static int rt_mutex_adjust_prio_chain(task_t *task,
 	spin_unlock_irqrestore(&task->pi_lock, flags);
  out_put_task:
 	put_task_struct(task);
+
 	return ret;
 }
 
@@ -403,10 +404,10 @@ static int task_blocks_on_rt_mutex(struct rt_mutex *lock,
 				   struct rt_mutex_waiter *waiter,
 				   int detect_deadlock)
 {
+	struct task_struct *owner = rt_mutex_owner(lock);
 	struct rt_mutex_waiter *top_waiter = waiter;
-	task_t *owner = rt_mutex_owner(lock);
-	int boost = 0, res;
 	unsigned long flags;
+	int boost = 0, res;
 
 	spin_lock_irqsave(&current->pi_lock, flags);
 	__rt_mutex_adjust_prio(current);
@@ -527,9 +528,9 @@ static void remove_waiter(struct rt_mutex *lock,
 			  struct rt_mutex_waiter *waiter)
 {
 	int first = (waiter == rt_mutex_top_waiter(lock));
-	int boost = 0;
-	task_t *owner = rt_mutex_owner(lock);
+	struct task_struct *owner = rt_mutex_owner(lock);
 	unsigned long flags;
+	int boost = 0;
 
 	spin_lock_irqsave(&current->pi_lock, flags);
 	plist_del(&waiter->list_entry, &lock->wait_list);
diff --git a/kernel/sched.c b/kernel/sched.c
index b0326141f84..021b3121951 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -179,7 +179,7 @@ static unsigned int static_prio_timeslice(int static_prio)
 		return SCALE_PRIO(DEF_TIMESLICE, static_prio);
 }
 
-static inline unsigned int task_timeslice(task_t *p)
+static inline unsigned int task_timeslice(struct task_struct *p)
 {
 	return static_prio_timeslice(p->static_prio);
 }
@@ -227,7 +227,7 @@ struct runqueue {
 
 	unsigned long expired_timestamp;
 	unsigned long long timestamp_last_tick;
-	task_t *curr, *idle;
+	struct task_struct *curr, *idle;
 	struct mm_struct *prev_mm;
 	prio_array_t *active, *expired, arrays[2];
 	int best_expired_prio;
@@ -240,7 +240,7 @@ struct runqueue {
 	int active_balance;
 	int push_cpu;
 
-	task_t *migration_thread;
+	struct task_struct *migration_thread;
 	struct list_head migration_queue;
 #endif
 
@@ -291,16 +291,16 @@ static DEFINE_PER_CPU(struct runqueue, runqueues);
 #endif
 
 #ifndef __ARCH_WANT_UNLOCKED_CTXSW
-static inline int task_running(runqueue_t *rq, task_t *p)
+static inline int task_running(runqueue_t *rq, struct task_struct *p)
 {
 	return rq->curr == p;
 }
 
-static inline void prepare_lock_switch(runqueue_t *rq, task_t *next)
+static inline void prepare_lock_switch(runqueue_t *rq, struct task_struct *next)
 {
 }
 
-static inline void finish_lock_switch(runqueue_t *rq, task_t *prev)
+static inline void finish_lock_switch(runqueue_t *rq, struct task_struct *prev)
 {
 #ifdef CONFIG_DEBUG_SPINLOCK
 	/* this is a valid case when another task releases the spinlock */
@@ -317,7 +317,7 @@ static inline void finish_lock_switch(runqueue_t *rq, task_t *prev)
 }
 
 #else /* __ARCH_WANT_UNLOCKED_CTXSW */
-static inline int task_running(runqueue_t *rq, task_t *p)
+static inline int task_running(runqueue_t *rq, struct task_struct *p)
 {
 #ifdef CONFIG_SMP
 	return p->oncpu;
@@ -326,7 +326,7 @@ static inline int task_running(runqueue_t *rq, task_t *p)
 #endif
 }
 
-static inline void prepare_lock_switch(runqueue_t *rq, task_t *next)
+static inline void prepare_lock_switch(runqueue_t *rq, struct task_struct *next)
 {
 #ifdef CONFIG_SMP
 	/*
@@ -343,7 +343,7 @@ static inline void prepare_lock_switch(runqueue_t *rq, task_t *next)
 #endif
 }
 
-static inline void finish_lock_switch(runqueue_t *rq, task_t *prev)
+static inline void finish_lock_switch(runqueue_t *rq, struct task_struct *prev)
 {
 #ifdef CONFIG_SMP
 	/*
@@ -364,7 +364,7 @@ static inline void finish_lock_switch(runqueue_t *rq, task_t *prev)
  * __task_rq_lock - lock the runqueue a given task resides on.
  * Must be called interrupts disabled.
  */
-static inline runqueue_t *__task_rq_lock(task_t *p)
+static inline runqueue_t *__task_rq_lock(struct task_struct *p)
 	__acquires(rq->lock)
 {
 	struct runqueue *rq;
@@ -384,7 +384,7 @@ repeat_lock_task:
  * interrupts.  Note the ordering: we can safely lookup the task_rq without
  * explicitly disabling preemption.
  */
-static runqueue_t *task_rq_lock(task_t *p, unsigned long *flags)
+static runqueue_t *task_rq_lock(struct task_struct *p, unsigned long *flags)
 	__acquires(rq->lock)
 {
 	struct runqueue *rq;
@@ -541,7 +541,7 @@ static inline runqueue_t *this_rq_lock(void)
  * long it was from the *first* time it was queued to the time that it
  * finally hit a cpu.
  */
-static inline void sched_info_dequeued(task_t *t)
+static inline void sched_info_dequeued(struct task_struct *t)
 {
 	t->sched_info.last_queued = 0;
 }
@@ -551,7 +551,7 @@ static inline void sched_info_dequeued(task_t *t)
  * long it was waiting to run.  We also note when it began so that we
  * can keep stats on how long its timeslice is.
  */
-static void sched_info_arrive(task_t *t)
+static void sched_info_arrive(struct task_struct *t)
 {
 	unsigned long now = jiffies, diff = 0;
 	struct runqueue *rq = task_rq(t);
@@ -585,7 +585,7 @@ static void sched_info_arrive(task_t *t)
  * the timestamp if it is already not set.  It's assumed that
  * sched_info_dequeued() will clear that stamp when appropriate.
  */
-static inline void sched_info_queued(task_t *t)
+static inline void sched_info_queued(struct task_struct *t)
 {
 	if (!t->sched_info.last_queued)
 		t->sched_info.last_queued = jiffies;
@@ -595,7 +595,7 @@ static inline void sched_info_queued(task_t *t)
  * Called when a process ceases being the active-running process, either
  * voluntarily or involuntarily.  Now we can calculate how long we ran.
  */
-static inline void sched_info_depart(task_t *t)
+static inline void sched_info_depart(struct task_struct *t)
 {
 	struct runqueue *rq = task_rq(t);
 	unsigned long diff = jiffies - t->sched_info.last_arrival;
@@ -611,7 +611,8 @@ static inline void sched_info_depart(task_t *t)
  * their time slice.  (This may also be called when switching to or from
  * the idle task.)  We are only called when prev != next.
  */
-static inline void sched_info_switch(task_t *prev, task_t *next)
+static inline void
+sched_info_switch(struct task_struct *prev, struct task_struct *next)
 {
 	struct runqueue *rq = task_rq(prev);
 
@@ -683,7 +684,7 @@ static inline void enqueue_task_head(struct task_struct *p, prio_array_t *array)
  * Both properties are important to certain workloads.
  */
 
-static inline int __normal_prio(task_t *p)
+static inline int __normal_prio(struct task_struct *p)
 {
 	int bonus, prio;
 
@@ -719,7 +720,7 @@ static inline int __normal_prio(task_t *p)
 #define RTPRIO_TO_LOAD_WEIGHT(rp) \
 	(PRIO_TO_LOAD_WEIGHT(MAX_RT_PRIO) + LOAD_WEIGHT(rp))
 
-static void set_load_weight(task_t *p)
+static void set_load_weight(struct task_struct *p)
 {
 	if (has_rt_policy(p)) {
 #ifdef CONFIG_SMP
@@ -737,23 +738,25 @@ static void set_load_weight(task_t *p)
 		p->load_weight = PRIO_TO_LOAD_WEIGHT(p->static_prio);
 }
 
-static inline void inc_raw_weighted_load(runqueue_t *rq, const task_t *p)
+static inline void
+inc_raw_weighted_load(runqueue_t *rq, const struct task_struct *p)
 {
 	rq->raw_weighted_load += p->load_weight;
 }
 
-static inline void dec_raw_weighted_load(runqueue_t *rq, const task_t *p)
+static inline void
+dec_raw_weighted_load(runqueue_t *rq, const struct task_struct *p)
 {
 	rq->raw_weighted_load -= p->load_weight;
 }
 
-static inline void inc_nr_running(task_t *p, runqueue_t *rq)
+static inline void inc_nr_running(struct task_struct *p, runqueue_t *rq)
 {
 	rq->nr_running++;
 	inc_raw_weighted_load(rq, p);
 }
 
-static inline void dec_nr_running(task_t *p, runqueue_t *rq)
+static inline void dec_nr_running(struct task_struct *p, runqueue_t *rq)
 {
 	rq->nr_running--;
 	dec_raw_weighted_load(rq, p);
@@ -766,7 +769,7 @@ static inline void dec_nr_running(task_t *p, runqueue_t *rq)
  * setprio syscalls, and whenever the interactivity
  * estimator recalculates.
  */
-static inline int normal_prio(task_t *p)
+static inline int normal_prio(struct task_struct *p)
 {
 	int prio;
 
@@ -784,7 +787,7 @@ static inline int normal_prio(task_t *p)
  * interactivity modifiers. Will be RT if the task got
  * RT-boosted. If not then it returns p->normal_prio.
  */
-static int effective_prio(task_t *p)
+static int effective_prio(struct task_struct *p)
 {
 	p->normal_prio = normal_prio(p);
 	/*
@@ -800,7 +803,7 @@ static int effective_prio(task_t *p)
 /*
  * __activate_task - move a task to the runqueue.
  */
-static void __activate_task(task_t *p, runqueue_t *rq)
+static void __activate_task(struct task_struct *p, runqueue_t *rq)
 {
 	prio_array_t *target = rq->active;
 
@@ -813,7 +816,7 @@ static void __activate_task(task_t *p, runqueue_t *rq)
 /*
  * __activate_idle_task - move idle task to the _front_ of runqueue.
  */
-static inline void __activate_idle_task(task_t *p, runqueue_t *rq)
+static inline void __activate_idle_task(struct task_struct *p, runqueue_t *rq)
 {
 	enqueue_task_head(p, rq->active);
 	inc_nr_running(p, rq);
@@ -823,7 +826,7 @@ static inline void __activate_idle_task(task_t *p, runqueue_t *rq)
  * Recalculate p->normal_prio and p->prio after having slept,
  * updating the sleep-average too:
  */
-static int recalc_task_prio(task_t *p, unsigned long long now)
+static int recalc_task_prio(struct task_struct *p, unsigned long long now)
 {
 	/* Caller must always ensure 'now >= p->timestamp' */
 	unsigned long sleep_time = now - p->timestamp;
@@ -895,7 +898,7 @@ static int recalc_task_prio(task_t *p, unsigned long long now)
  * Update all the scheduling statistics stuff. (sleep average
  * calculation, priority modifiers, etc.)
  */
-static void activate_task(task_t *p, runqueue_t *rq, int local)
+static void activate_task(struct task_struct *p, runqueue_t *rq, int local)
 {
 	unsigned long long now;
 
@@ -962,7 +965,7 @@ static void deactivate_task(struct task_struct *p, runqueue_t *rq)
 #define tsk_is_polling(t) test_tsk_thread_flag(t, TIF_POLLING_NRFLAG)
 #endif
 
-static void resched_task(task_t *p)
+static void resched_task(struct task_struct *p)
 {
 	int cpu;
 
@@ -983,7 +986,7 @@ static void resched_task(task_t *p)
 		smp_send_reschedule(cpu);
 }
 #else
-static inline void resched_task(task_t *p)
+static inline void resched_task(struct task_struct *p)
 {
 	assert_spin_locked(&task_rq(p)->lock);
 	set_tsk_need_resched(p);
@@ -994,7 +997,7 @@ static inline void resched_task(task_t *p)
  * task_curr - is this task currently executing on a CPU?
  * @p: the task in question.
  */
-inline int task_curr(const task_t *p)
+inline int task_curr(const struct task_struct *p)
 {
 	return cpu_curr(task_cpu(p)) == p;
 }
@@ -1009,7 +1012,7 @@ unsigned long weighted_cpuload(const int cpu)
 typedef struct {
 	struct list_head list;
 
-	task_t *task;
+	struct task_struct *task;
 	int dest_cpu;
 
 	struct completion done;
@@ -1019,7 +1022,8 @@ typedef struct {
  * The task's runqueue lock must be held.
  * Returns true if you have to wait for migration thread.
  */
-static int migrate_task(task_t *p, int dest_cpu, migration_req_t *req)
+static int
+migrate_task(struct task_struct *p, int dest_cpu, migration_req_t *req)
 {
 	runqueue_t *rq = task_rq(p);
 
@@ -1049,7 +1053,7 @@ static int migrate_task(task_t *p, int dest_cpu, migration_req_t *req)
  * smp_call_function() if an IPI is sent by the same process we are
  * waiting to become inactive.
  */
-void wait_task_inactive(task_t *p)
+void wait_task_inactive(struct task_struct *p)
 {
 	unsigned long flags;
 	runqueue_t *rq;
@@ -1083,7 +1087,7 @@ repeat:
  * to another CPU then no harm is done and the purpose has been
  * achieved as well.
  */
-void kick_process(task_t *p)
+void kick_process(struct task_struct *p)
 {
 	int cpu;
 
@@ -1286,7 +1290,7 @@ nextlevel:
  * Returns the CPU we should wake onto.
  */
 #if defined(ARCH_HAS_SCHED_WAKE_IDLE)
-static int wake_idle(int cpu, task_t *p)
+static int wake_idle(int cpu, struct task_struct *p)
 {
 	cpumask_t tmp;
 	struct sched_domain *sd;
@@ -1309,7 +1313,7 @@ static int wake_idle(int cpu, task_t *p)
 	return cpu;
 }
 #else
-static inline int wake_idle(int cpu, task_t *p)
+static inline int wake_idle(int cpu, struct task_struct *p)
 {
 	return cpu;
 }
@@ -1329,7 +1333,7 @@ static inline int wake_idle(int cpu, task_t *p)
  *
  * returns failure only if the task is already active.
  */
-static int try_to_wake_up(task_t *p, unsigned int state, int sync)
+static int try_to_wake_up(struct task_struct *p, unsigned int state, int sync)
 {
 	int cpu, this_cpu, success = 0;
 	unsigned long flags;
@@ -1487,14 +1491,14 @@ out:
 	return success;
 }
 
-int fastcall wake_up_process(task_t *p)
+int fastcall wake_up_process(struct task_struct *p)
 {
 	return try_to_wake_up(p, TASK_STOPPED | TASK_TRACED |
 				 TASK_INTERRUPTIBLE | TASK_UNINTERRUPTIBLE, 0);
 }
 EXPORT_SYMBOL(wake_up_process);
 
-int fastcall wake_up_state(task_t *p, unsigned int state)
+int fastcall wake_up_state(struct task_struct *p, unsigned int state)
 {
 	return try_to_wake_up(p, state, 0);
 }
@@ -1503,7 +1507,7 @@ int fastcall wake_up_state(task_t *p, unsigned int state)
  * Perform scheduler related setup for a newly forked process p.
  * p is forked by current.
  */
-void fastcall sched_fork(task_t *p, int clone_flags)
+void fastcall sched_fork(struct task_struct *p, int clone_flags)
 {
 	int cpu = get_cpu();
 
@@ -1571,7 +1575,7 @@ void fastcall sched_fork(task_t *p, int clone_flags)
  * that must be done for every newly created context, then puts the task
  * on the runqueue and wakes it.
  */
-void fastcall wake_up_new_task(task_t *p, unsigned long clone_flags)
+void fastcall wake_up_new_task(struct task_struct *p, unsigned long clone_flags)
 {
 	unsigned long flags;
 	int this_cpu, cpu;
@@ -1655,7 +1659,7 @@ void fastcall wake_up_new_task(task_t *p, unsigned long clone_flags)
  * artificially, because any timeslice recovered here
  * was given away by the parent in the first place.)
  */
-void fastcall sched_exit(task_t *p)
+void fastcall sched_exit(struct task_struct *p)
 {
 	unsigned long flags;
 	runqueue_t *rq;
@@ -1689,7 +1693,7 @@ void fastcall sched_exit(task_t *p)
  * prepare_task_switch sets up locking and calls architecture specific
  * hooks.
  */
-static inline void prepare_task_switch(runqueue_t *rq, task_t *next)
+static inline void prepare_task_switch(runqueue_t *rq, struct task_struct *next)
 {
 	prepare_lock_switch(rq, next);
 	prepare_arch_switch(next);
@@ -1710,7 +1714,7 @@ static inline void prepare_task_switch(runqueue_t *rq, task_t *next)
  * with the lock held can cause deadlocks; see schedule() for
  * details.)
  */
-static inline void finish_task_switch(runqueue_t *rq, task_t *prev)
+static inline void finish_task_switch(runqueue_t *rq, struct task_struct *prev)
 	__releases(rq->lock)
 {
 	struct mm_struct *mm = rq->prev_mm;
@@ -1748,7 +1752,7 @@ static inline void finish_task_switch(runqueue_t *rq, task_t *prev)
  * schedule_tail - first thing a freshly forked thread must call.
  * @prev: the thread we just switched away from.
  */
-asmlinkage void schedule_tail(task_t *prev)
+asmlinkage void schedule_tail(struct task_struct *prev)
 	__releases(rq->lock)
 {
 	runqueue_t *rq = this_rq();
@@ -1765,8 +1769,9 @@ asmlinkage void schedule_tail(task_t *prev)
  * context_switch - switch to the new MM and the new
  * thread's register state.
  */
-static inline
-task_t * context_switch(runqueue_t *rq, task_t *prev, task_t *next)
+static inline struct task_struct *
+context_switch(runqueue_t *rq, struct task_struct *prev,
+	       struct task_struct *next)
 {
 	struct mm_struct *mm = next->mm;
 	struct mm_struct *oldmm = prev->active_mm;
@@ -1937,7 +1942,7 @@ static void double_lock_balance(runqueue_t *this_rq, runqueue_t *busiest)
  * allow dest_cpu, which will force the cpu onto dest_cpu.  Then
  * the cpu_allowed mask is restored.
  */
-static void sched_migrate_task(task_t *p, int dest_cpu)
+static void sched_migrate_task(struct task_struct *p, int dest_cpu)
 {
 	migration_req_t req;
 	runqueue_t *rq;
@@ -1952,11 +1957,13 @@ static void sched_migrate_task(task_t *p, int dest_cpu)
 	if (migrate_task(p, dest_cpu, &req)) {
 		/* Need to wait for migration thread (might exit: take ref). */
 		struct task_struct *mt = rq->migration_thread;
+
 		get_task_struct(mt);
 		task_rq_unlock(rq, &flags);
 		wake_up_process(mt);
 		put_task_struct(mt);
 		wait_for_completion(&req.done);
+
 		return;
 	}
 out:
@@ -1980,9 +1987,9 @@ void sched_exec(void)
  * pull_task - move a task from a remote runqueue to the local runqueue.
  * Both runqueues must be locked.
  */
-static
-void pull_task(runqueue_t *src_rq, prio_array_t *src_array, task_t *p,
-	       runqueue_t *this_rq, prio_array_t *this_array, int this_cpu)
+static void pull_task(runqueue_t *src_rq, prio_array_t *src_array,
+		      struct task_struct *p, runqueue_t *this_rq,
+		      prio_array_t *this_array, int this_cpu)
 {
 	dequeue_task(p, src_array);
 	dec_nr_running(p, src_rq);
@@ -2003,7 +2010,7 @@ void pull_task(runqueue_t *src_rq, prio_array_t *src_array, task_t *p,
  * can_migrate_task - may task p from runqueue rq be migrated to this_cpu?
  */
 static
-int can_migrate_task(task_t *p, runqueue_t *rq, int this_cpu,
+int can_migrate_task(struct task_struct *p, runqueue_t *rq, int this_cpu,
 		     struct sched_domain *sd, enum idle_type idle,
 		     int *all_pinned)
 {
@@ -2052,8 +2059,8 @@ static int move_tasks(runqueue_t *this_rq, int this_cpu, runqueue_t *busiest,
 	    best_prio_seen, skip_for_load;
 	prio_array_t *array, *dst_array;
 	struct list_head *head, *curr;
+	struct task_struct *tmp;
 	long rem_load_move;
-	task_t *tmp;
 
 	if (max_nr_move == 0 || max_load_move == 0)
 		goto out;
@@ -2105,7 +2112,7 @@ skip_bitmap:
 	head = array->queue + idx;
 	curr = head->prev;
 skip_queue:
-	tmp = list_entry(curr, task_t, run_list);
+	tmp = list_entry(curr, struct task_struct, run_list);
 
 	curr = curr->prev;
 
@@ -2819,7 +2826,7 @@ EXPORT_PER_CPU_SYMBOL(kstat);
  * Bank in p->sched_time the ns elapsed since the last tick or switch.
  */
 static inline void
-update_cpu_clock(task_t *p, runqueue_t *rq, unsigned long long now)
+update_cpu_clock(struct task_struct *p, runqueue_t *rq, unsigned long long now)
 {
 	p->sched_time += now - max(p->timestamp, rq->timestamp_last_tick);
 }
@@ -2828,7 +2835,7 @@ update_cpu_clock(task_t *p, runqueue_t *rq, unsigned long long now)
  * Return current->sched_time plus any more ns on the sched_clock
  * that have not yet been banked.
  */
-unsigned long long current_sched_time(const task_t *p)
+unsigned long long current_sched_time(const struct task_struct *p)
 {
 	unsigned long long ns;
 	unsigned long flags;
@@ -2945,9 +2952,9 @@ void account_steal_time(struct task_struct *p, cputime_t steal)
 void scheduler_tick(void)
 {
 	unsigned long long now = sched_clock();
+	struct task_struct *p = current;
 	int cpu = smp_processor_id();
 	runqueue_t *rq = this_rq();
-	task_t *p = current;
 
 	update_cpu_clock(p, rq, now);
 
@@ -3079,7 +3086,8 @@ static void wake_sleeping_dependent(int this_cpu)
  * utilize, if another task runs on a sibling. This models the
  * slowdown effect of other tasks running on siblings:
  */
-static inline unsigned long smt_slice(task_t *p, struct sched_domain *sd)
+static inline unsigned long
+smt_slice(struct task_struct *p, struct sched_domain *sd)
 {
 	return p->time_slice * (100 - sd->per_cpu_gain) / 100;
 }
@@ -3090,7 +3098,8 @@ static inline unsigned long smt_slice(task_t *p, struct sched_domain *sd)
  * acquire their lock. As we only trylock the normal locking order does not
  * need to be obeyed.
  */
-static int dependent_sleeper(int this_cpu, runqueue_t *this_rq, task_t *p)
+static int
+dependent_sleeper(int this_cpu, runqueue_t *this_rq, struct task_struct *p)
 {
 	struct sched_domain *tmp, *sd = NULL;
 	int ret = 0, i;
@@ -3110,8 +3119,8 @@ static int dependent_sleeper(int this_cpu, runqueue_t *this_rq, task_t *p)
 		return 0;
 
 	for_each_cpu_mask(i, sd->span) {
+		struct task_struct *smt_curr;
 		runqueue_t *smt_rq;
-		task_t *smt_curr;
 
 		if (i == this_cpu)
 			continue;
@@ -3157,7 +3166,7 @@ static inline void wake_sleeping_dependent(int this_cpu)
 {
 }
 static inline int
-dependent_sleeper(int this_cpu, runqueue_t *this_rq, task_t *p)
+dependent_sleeper(int this_cpu, runqueue_t *this_rq, struct task_struct *p)
 {
 	return 0;
 }
@@ -3211,11 +3220,11 @@ static inline int interactive_sleep(enum sleep_type sleep_type)
  */
 asmlinkage void __sched schedule(void)
 {
+	struct task_struct *prev, *next;
 	struct list_head *queue;
 	unsigned long long now;
 	unsigned long run_time;
 	int cpu, idx, new_prio;
-	task_t *prev, *next;
 	prio_array_t *array;
 	long *switch_count;
 	runqueue_t *rq;
@@ -3308,7 +3317,7 @@ need_resched_nonpreemptible:
 
 	idx = sched_find_first_bit(array->bitmap);
 	queue = array->queue + idx;
-	next = list_entry(queue->next, task_t, run_list);
+	next = list_entry(queue->next, struct task_struct, run_list);
 
 	if (!rt_task(next) && interactive_sleep(next->sleep_type)) {
 		unsigned long long delta = now - next->timestamp;
@@ -3776,7 +3785,7 @@ EXPORT_SYMBOL(sleep_on_timeout);
  *
  * Used by the rt_mutex code to implement priority inheritance logic.
  */
-void rt_mutex_setprio(task_t *p, int prio)
+void rt_mutex_setprio(struct task_struct *p, int prio)
 {
 	unsigned long flags;
 	prio_array_t *array;
@@ -3817,7 +3826,7 @@ void rt_mutex_setprio(task_t *p, int prio)
 
 #endif
 
-void set_user_nice(task_t *p, long nice)
+void set_user_nice(struct task_struct *p, long nice)
 {
 	int old_prio, delta;
 	unsigned long flags;
@@ -3873,7 +3882,7 @@ EXPORT_SYMBOL(set_user_nice);
  * @p: task
  * @nice: nice value
  */
-int can_nice(const task_t *p, const int nice)
+int can_nice(const struct task_struct *p, const int nice)
 {
 	/* convert nice value [19,-20] to rlimit style value [1,40] */
 	int nice_rlim = 20 - nice;
@@ -3932,7 +3941,7 @@ asmlinkage long sys_nice(int increment)
  * RT tasks are offset by -200. Normal tasks are centered
  * around 0, value goes from -16 to +15.
  */
-int task_prio(const task_t *p)
+int task_prio(const struct task_struct *p)
 {
 	return p->prio - MAX_RT_PRIO;
 }
@@ -3941,7 +3950,7 @@ int task_prio(const task_t *p)
  * task_nice - return the nice value of a given task.
  * @p: the task in question.
  */
-int task_nice(const task_t *p)
+int task_nice(const struct task_struct *p)
 {
 	return TASK_NICE(p);
 }
@@ -3960,7 +3969,7 @@ int idle_cpu(int cpu)
  * idle_task - return the idle task for a given cpu.
  * @cpu: the processor in question.
  */
-task_t *idle_task(int cpu)
+struct task_struct *idle_task(int cpu)
 {
 	return cpu_rq(cpu)->idle;
 }
@@ -3969,7 +3978,7 @@ task_t *idle_task(int cpu)
  * find_process_by_pid - find a process with a matching PID value.
  * @pid: the pid in question.
  */
-static inline task_t *find_process_by_pid(pid_t pid)
+static inline struct task_struct *find_process_by_pid(pid_t pid)
 {
 	return pid ? find_task_by_pid(pid) : current;
 }
@@ -4103,9 +4112,9 @@ EXPORT_SYMBOL_GPL(sched_setscheduler);
 static int
 do_sched_setscheduler(pid_t pid, int policy, struct sched_param __user *param)
 {
-	int retval;
 	struct sched_param lparam;
 	struct task_struct *p;
+	int retval;
 
 	if (!param || pid < 0)
 		return -EINVAL;
@@ -4121,6 +4130,7 @@ do_sched_setscheduler(pid_t pid, int policy, struct sched_param __user *param)
 	read_unlock_irq(&tasklist_lock);
 	retval = sched_setscheduler(p, policy, &lparam);
 	put_task_struct(p);
+
 	return retval;
 }
 
@@ -4156,8 +4166,8 @@ asmlinkage long sys_sched_setparam(pid_t pid, struct sched_param __user *param)
  */
 asmlinkage long sys_sched_getscheduler(pid_t pid)
 {
+	struct task_struct *p;
 	int retval = -EINVAL;
-	task_t *p;
 
 	if (pid < 0)
 		goto out_nounlock;
@@ -4184,8 +4194,8 @@ out_nounlock:
 asmlinkage long sys_sched_getparam(pid_t pid, struct sched_param __user *param)
 {
 	struct sched_param lp;
+	struct task_struct *p;
 	int retval = -EINVAL;
-	task_t *p;
 
 	if (!param || pid < 0)
 		goto out_nounlock;
@@ -4218,9 +4228,9 @@ out_unlock:
 
 long sched_setaffinity(pid_t pid, cpumask_t new_mask)
 {
-	task_t *p;
-	int retval;
 	cpumask_t cpus_allowed;
+	struct task_struct *p;
+	int retval;
 
 	lock_cpu_hotplug();
 	read_lock(&tasklist_lock);
@@ -4306,8 +4316,8 @@ cpumask_t cpu_possible_map __read_mostly = CPU_MASK_ALL;
 
 long sched_getaffinity(pid_t pid, cpumask_t *mask)
 {
+	struct task_struct *p;
 	int retval;
-	task_t *p;
 
 	lock_cpu_hotplug();
 	read_lock(&tasklist_lock);
@@ -4592,9 +4602,9 @@ asmlinkage long sys_sched_get_priority_min(int policy)
 asmlinkage
 long sys_sched_rr_get_interval(pid_t pid, struct timespec __user *interval)
 {
+	struct task_struct *p;
 	int retval = -EINVAL;
 	struct timespec t;
-	task_t *p;
 
 	if (pid < 0)
 		goto out_nounlock;
@@ -4641,12 +4651,13 @@ static inline struct task_struct *younger_sibling(struct task_struct *p)
 	return list_entry(p->sibling.next,struct task_struct,sibling);
 }
 
-static void show_task(task_t *p)
+static const char *stat_nam[] = { "R", "S", "D", "T", "t", "Z", "X" };
+
+static void show_task(struct task_struct *p)
 {
-	task_t *relative;
-	unsigned state;
+	struct task_struct *relative;
 	unsigned long free = 0;
-	static const char *stat_nam[] = { "R", "S", "D", "T", "t", "Z", "X" };
+	unsigned state;
 
 	printk("%-13.13s ", p->comm);
 	state = p->state ? __ffs(p->state) + 1 : 0;
@@ -4697,7 +4708,7 @@ static void show_task(task_t *p)
 
 void show_state(void)
 {
-	task_t *g, *p;
+	struct task_struct *g, *p;
 
 #if (BITS_PER_LONG == 32)
 	printk("\n"
@@ -4730,7 +4741,7 @@ void show_state(void)
  * NOTE: this function does not set the idle thread's NEED_RESCHED
  * flag, to make booting more robust.
  */
-void __devinit init_idle(task_t *idle, int cpu)
+void __devinit init_idle(struct task_struct *idle, int cpu)
 {
 	runqueue_t *rq = cpu_rq(cpu);
 	unsigned long flags;
@@ -4793,7 +4804,7 @@ cpumask_t nohz_cpu_mask = CPU_MASK_NONE;
  * task must not exit() & deallocate itself prematurely.  The
  * call is not atomic; no spinlocks may be held.
  */
-int set_cpus_allowed(task_t *p, cpumask_t new_mask)
+int set_cpus_allowed(struct task_struct *p, cpumask_t new_mask)
 {
 	unsigned long flags;
 	migration_req_t req;
@@ -5061,7 +5072,7 @@ void idle_task_exit(void)
 	mmdrop(mm);
 }
 
-static void migrate_dead(unsigned int dead_cpu, task_t *p)
+static void migrate_dead(unsigned int dead_cpu, struct task_struct *p)
 {
 	struct runqueue *rq = cpu_rq(dead_cpu);
 
@@ -5096,9 +5107,8 @@ static void migrate_dead_tasks(unsigned int dead_cpu)
 			struct list_head *list = &rq->arrays[arr].queue[i];
 
 			while (!list_empty(list))
-				migrate_dead(dead_cpu,
-					     list_entry(list->next, task_t,
-							run_list));
+				migrate_dead(dead_cpu, list_entry(list->next,
+					     struct task_struct, run_list));
 		}
 	}
 }
@@ -6801,7 +6811,7 @@ void normalize_rt_tasks(void)
  *
  * ONLY VALID WHEN THE WHOLE SYSTEM IS STOPPED!
  */
-task_t *curr_task(int cpu)
+struct task_struct *curr_task(int cpu)
 {
 	return cpu_curr(cpu);
 }
@@ -6821,7 +6831,7 @@ task_t *curr_task(int cpu)
  *
  * ONLY VALID WHEN THE WHOLE SYSTEM IS STOPPED!
  */
-void set_curr_task(int cpu, task_t *p)
+void set_curr_task(int cpu, struct task_struct *p)
 {
 	cpu_curr(cpu) = p;
 }
diff --git a/kernel/timer.c b/kernel/timer.c
index b761898d04c..396a3c024c2 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -1368,7 +1368,7 @@ asmlinkage long sys_getegid(void)
 
 static void process_timeout(unsigned long __data)
 {
-	wake_up_process((task_t *)__data);
+	wake_up_process((struct task_struct *)__data);
 }
 
 /**
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 59f0b42bd89..90d2c600165 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -51,7 +51,7 @@ struct cpu_workqueue_struct {
 	wait_queue_head_t work_done;
 
 	struct workqueue_struct *wq;
-	task_t *thread;
+	struct task_struct *thread;
 
 	int run_depth;		/* Detect run_workqueue() recursion depth */
 } ____cacheline_aligned;
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index d46ed0f1dc0..b9af136e5cf 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -225,7 +225,7 @@ static struct task_struct *select_bad_process(unsigned long *ppoints)
  * CAP_SYS_RAW_IO set, send SIGTERM instead (but it's unlikely that
  * we select a process with CAP_SYS_RAW_IO set).
  */
-static void __oom_kill_task(task_t *p, const char *message)
+static void __oom_kill_task(struct task_struct *p, const char *message)
 {
 	if (p->pid == 1) {
 		WARN_ON(1);
@@ -255,10 +255,10 @@ static void __oom_kill_task(task_t *p, const char *message)
 	force_sig(SIGKILL, p);
 }
 
-static int oom_kill_task(task_t *p, const char *message)
+static int oom_kill_task(struct task_struct *p, const char *message)
 {
 	struct mm_struct *mm;
-	task_t * g, * q;
+	struct task_struct *g, *q;
 
 	mm = p->mm;
 
@@ -316,7 +316,7 @@ static int oom_kill_process(struct task_struct *p, unsigned long points,
  */
 void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask, int order)
 {
-	task_t *p;
+	struct task_struct *p;
 	unsigned long points = 0;
 
 	if (printk_ratelimit()) {