diff options
| author | Alexey Dobriyan <adobriyan@sw.ru> | 2007-10-16 23:27:30 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-17 08:42:55 -0700 |
| commit | 42b2dd0a02c512cf59c96f5c227bf54bfe5bbf08 (patch) | |
| tree | f9e4a572804897772d97e2db1ab0d2adcd28840c | |
| parent | bcbba6c10ef6b14b0542d7ed7380e95168175818 (diff) | |
Shrink task_struct if CONFIG_FUTEX=n
robust_list, compat_robust_list, pi_state_list, pi_state_cache are
really used if futexes are on.
Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | include/linux/sched.h | 3 | ||||
| -rw-r--r-- | kernel/exit.c | 6 | ||||
| -rw-r--r-- | kernel/fork.c | 3 |
3 files changed, 9 insertions, 3 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index 87f2eb27ee1..57166582a3f 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1132,13 +1132,14 @@ struct task_struct { int cpuset_mems_generation; int cpuset_mem_spread_rotor; #endif +#ifdef CONFIG_FUTEX struct robust_list_head __user *robust_list; #ifdef CONFIG_COMPAT struct compat_robust_list_head __user *compat_robust_list; #endif struct list_head pi_state_list; struct futex_pi_state *pi_state_cache; - +#endif atomic_t fs_excl; /* holding fs exclusive resources */ struct rcu_head rcu; diff --git a/kernel/exit.c b/kernel/exit.c index 4c108df88a3..2c704c86edb 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -947,12 +947,14 @@ fastcall NORET_TYPE void do_exit(long code) exit_itimers(tsk->signal); } acct_collect(code, group_dead); +#ifdef CONFIG_FUTEX if (unlikely(tsk->robust_list)) exit_robust_list(tsk); -#if defined(CONFIG_FUTEX) && defined(CONFIG_COMPAT) +#ifdef CONFIG_COMPAT if (unlikely(tsk->compat_robust_list)) compat_exit_robust_list(tsk); #endif +#endif if (group_dead) tty_audit_exit(); if (unlikely(tsk->audit_context)) @@ -987,6 +989,7 @@ fastcall NORET_TYPE void do_exit(long code) mpol_free(tsk->mempolicy); tsk->mempolicy = NULL; #endif +#ifdef CONFIG_FUTEX /* * This must happen late, after the PID is not * hashed anymore: @@ -995,6 +998,7 @@ fastcall NORET_TYPE void do_exit(long code) exit_pi_state_list(tsk); if (unlikely(current->pi_state_cache)) kfree(current->pi_state_cache); +#endif /* * Make sure we are holding no locks: */ diff --git a/kernel/fork.c b/kernel/fork.c index 8a97e92c604..3e764f6f2be 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1156,13 +1156,14 @@ static struct task_struct *copy_process(unsigned long clone_flags, * Clear TID on mm_release()? */ p->clear_child_tid = (clone_flags & CLONE_CHILD_CLEARTID) ? child_tidptr: NULL; +#ifdef CONFIG_FUTEX p->robust_list = NULL; #ifdef CONFIG_COMPAT p->compat_robust_list = NULL; #endif INIT_LIST_HEAD(&p->pi_state_list); p->pi_state_cache = NULL; - +#endif /* * sigaltstack should be cleared when sharing the same VM */ |