diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/cpuset.c | 52 | ||||
| -rw-r--r-- | kernel/kgdb.c | 8 | ||||
| -rw-r--r-- | kernel/module.c | 25 | ||||
| -rw-r--r-- | kernel/relay.c | 2 | ||||
| -rw-r--r-- | kernel/sched.c | 31 | ||||
| -rw-r--r-- | kernel/sched_fair.c | 11 |
6 files changed, 71 insertions, 58 deletions
diff --git a/kernel/cpuset.c b/kernel/cpuset.c index 8da627d3380..86ea9e34e32 100644 --- a/kernel/cpuset.c +++ b/kernel/cpuset.c @@ -1031,11 +1031,9 @@ int current_cpuset_is_being_rebound(void) return task_cs(current) == cpuset_being_rebound; } -static int update_relax_domain_level(struct cpuset *cs, char *buf) +static int update_relax_domain_level(struct cpuset *cs, s64 val) { - int val = simple_strtol(buf, NULL, 10); - - if (val < 0) + if ((int)val < 0) val = -1; if (val != cs->relax_domain_level) { @@ -1280,9 +1278,6 @@ static ssize_t cpuset_common_file_write(struct cgroup *cont, case FILE_MEMLIST: retval = update_nodemask(cs, buffer); break; - case FILE_SCHED_RELAX_DOMAIN_LEVEL: - retval = update_relax_domain_level(cs, buffer); - break; default: retval = -EINVAL; goto out2; @@ -1348,6 +1343,30 @@ static int cpuset_write_u64(struct cgroup *cgrp, struct cftype *cft, u64 val) return retval; } +static int cpuset_write_s64(struct cgroup *cgrp, struct cftype *cft, s64 val) +{ + int retval = 0; + struct cpuset *cs = cgroup_cs(cgrp); + cpuset_filetype_t type = cft->private; + + cgroup_lock(); + + if (cgroup_is_removed(cgrp)) { + cgroup_unlock(); + return -ENODEV; + } + switch (type) { + case FILE_SCHED_RELAX_DOMAIN_LEVEL: + retval = update_relax_domain_level(cs, val); + break; + default: + retval = -EINVAL; + break; + } + cgroup_unlock(); + return retval; +} + /* * These ascii lists should be read in a single call, by using a user * buffer large enough to hold the entire map. If read in smaller @@ -1406,9 +1425,6 @@ static ssize_t cpuset_common_file_read(struct cgroup *cont, case FILE_MEMLIST: s += cpuset_sprintf_memlist(s, cs); break; - case FILE_SCHED_RELAX_DOMAIN_LEVEL: - s += sprintf(s, "%d", cs->relax_domain_level); - break; default: retval = -EINVAL; goto out; @@ -1449,6 +1465,18 @@ static u64 cpuset_read_u64(struct cgroup *cont, struct cftype *cft) } } +static s64 cpuset_read_s64(struct cgroup *cont, struct cftype *cft) +{ + struct cpuset *cs = cgroup_cs(cont); + cpuset_filetype_t type = cft->private; + switch (type) { + case FILE_SCHED_RELAX_DOMAIN_LEVEL: + return cs->relax_domain_level; + default: + BUG(); + } +} + /* * for the common functions, 'private' gives the type of file @@ -1499,8 +1527,8 @@ static struct cftype files[] = { { .name = "sched_relax_domain_level", - .read_u64 = cpuset_read_u64, - .write_u64 = cpuset_write_u64, + .read_s64 = cpuset_read_s64, + .write_s64 = cpuset_write_s64, .private = FILE_SCHED_RELAX_DOMAIN_LEVEL, }, diff --git a/kernel/kgdb.c b/kernel/kgdb.c index 39e31a036f5..14787de568b 100644 --- a/kernel/kgdb.c +++ b/kernel/kgdb.c @@ -346,14 +346,6 @@ static void put_packet(char *buffer) } } -static char *pack_hex_byte(char *pkt, u8 byte) -{ - *pkt++ = hexchars[byte >> 4]; - *pkt++ = hexchars[byte & 0xf]; - - return pkt; -} - /* * Convert the memory pointed to by mem into hex, placing result in buf. * Return a pointer to the last char put in buf (null). May return an error. diff --git a/kernel/module.c b/kernel/module.c index 8e4528c9909..f5e9491ef7a 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -917,6 +917,10 @@ static int check_version(Elf_Shdr *sechdrs, if (!crc) return 1; + /* No versions at all? modprobe --force does this. */ + if (versindex == 0) + return try_to_force_load(mod, symname) == 0; + versions = (void *) sechdrs[versindex].sh_addr; num_versions = sechdrs[versindex].sh_size / sizeof(struct modversion_info); @@ -932,8 +936,9 @@ static int check_version(Elf_Shdr *sechdrs, goto bad_version; } - if (!try_to_force_load(mod, symname)) - return 1; + printk(KERN_WARNING "%s: no symbol version for %s\n", + mod->name, symname); + return 0; bad_version: printk("%s: disagrees about version of symbol %s\n", @@ -952,11 +957,14 @@ static inline int check_modstruct_version(Elf_Shdr *sechdrs, return check_version(sechdrs, versindex, "struct_module", mod, crc); } -/* First part is kernel version, which we ignore. */ -static inline int same_magic(const char *amagic, const char *bmagic) +/* First part is kernel version, which we ignore if module has crcs. */ +static inline int same_magic(const char *amagic, const char *bmagic, + bool has_crcs) { - amagic += strcspn(amagic, " "); - bmagic += strcspn(bmagic, " "); + if (has_crcs) { + amagic += strcspn(amagic, " "); + bmagic += strcspn(bmagic, " "); + } return strcmp(amagic, bmagic) == 0; } #else @@ -976,7 +984,8 @@ static inline int check_modstruct_version(Elf_Shdr *sechdrs, return 1; } -static inline int same_magic(const char *amagic, const char *bmagic) +static inline int same_magic(const char *amagic, const char *bmagic, + bool has_crcs) { return strcmp(amagic, bmagic) == 0; } @@ -1869,7 +1878,7 @@ static struct module *load_module(void __user *umod, err = try_to_force_load(mod, "magic"); if (err) goto free_hdr; - } else if (!same_magic(modmagic, vermagic)) { + } else if (!same_magic(modmagic, vermagic, versindex)) { printk(KERN_ERR "%s: version magic '%s' should be '%s'\n", mod->name, modmagic, vermagic); err = -ENOEXEC; diff --git a/kernel/relay.c b/kernel/relay.c index 7de644cdec4..bc24dcdc570 100644 --- a/kernel/relay.c +++ b/kernel/relay.c @@ -1191,7 +1191,7 @@ static ssize_t relay_file_splice_read(struct file *in, ret = 0; spliced = 0; - while (len && !spliced) { + while (len) { ret = subbuf_splice_actor(in, ppos, pipe, len, flags, &nonpad_ret); if (ret < 0) break; diff --git a/kernel/sched.c b/kernel/sched.c index 58fb8af1577..cfa222a9153 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -4567,8 +4567,6 @@ EXPORT_SYMBOL(schedule); asmlinkage void __sched preempt_schedule(void) { struct thread_info *ti = current_thread_info(); - struct task_struct *task = current; - int saved_lock_depth; /* * If there is a non-zero preempt_count or interrupts are disabled, @@ -4579,16 +4577,7 @@ asmlinkage void __sched preempt_schedule(void) do { add_preempt_count(PREEMPT_ACTIVE); - - /* - * We keep the big kernel semaphore locked, but we - * clear ->lock_depth so that schedule() doesnt - * auto-release the semaphore: - */ - saved_lock_depth = task->lock_depth; - task->lock_depth = -1; schedule(); - task->lock_depth = saved_lock_depth; sub_preempt_count(PREEMPT_ACTIVE); /* @@ -4609,26 +4598,15 @@ EXPORT_SYMBOL(preempt_schedule); asmlinkage void __sched preempt_schedule_irq(void) { struct thread_info *ti = current_thread_info(); - struct task_struct *task = current; - int saved_lock_depth; /* Catch callers which need to be fixed */ BUG_ON(ti->preempt_count || !irqs_disabled()); do { add_preempt_count(PREEMPT_ACTIVE); - - /* - * We keep the big kernel semaphore locked, but we - * clear ->lock_depth so that schedule() doesnt - * auto-release the semaphore: - */ - saved_lock_depth = task->lock_depth; - task->lock_depth = -1; local_irq_enable(); schedule(); local_irq_disable(); - task->lock_depth = saved_lock_depth; sub_preempt_count(PREEMPT_ACTIVE); /* @@ -5547,7 +5525,6 @@ static void __cond_resched(void) } while (need_resched()); } -#if !defined(CONFIG_PREEMPT) || defined(CONFIG_PREEMPT_VOLUNTARY) int __sched _cond_resched(void) { if (need_resched() && !(preempt_count() & PREEMPT_ACTIVE) && @@ -5558,7 +5535,6 @@ int __sched _cond_resched(void) return 0; } EXPORT_SYMBOL(_cond_resched); -#endif /* * cond_resched_lock() - if a reschedule is pending, drop the given lock, @@ -5853,8 +5829,11 @@ void __cpuinit init_idle(struct task_struct *idle, int cpu) spin_unlock_irqrestore(&rq->lock, flags); /* Set the preempt count _outside_ the spinlocks! */ +#if defined(CONFIG_PREEMPT) + task_thread_info(idle)->preempt_count = (idle->lock_depth >= 0); +#else task_thread_info(idle)->preempt_count = 0; - +#endif /* * The idle tasks have their own, simple scheduling class: */ @@ -9007,7 +8986,7 @@ static u64 cpu_shares_read_u64(struct cgroup *cgrp, struct cftype *cft) #endif #ifdef CONFIG_RT_GROUP_SCHED -static ssize_t cpu_rt_runtime_write(struct cgroup *cgrp, struct cftype *cft, +static int cpu_rt_runtime_write(struct cgroup *cgrp, struct cftype *cft, s64 val) { return sched_group_set_rt_runtime(cgroup_tg(cgrp), val); diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index c863663d204..e24ecd39c4b 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -662,10 +662,15 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial) if (!initial) { /* sleeps upto a single latency don't count. */ if (sched_feat(NEW_FAIR_SLEEPERS)) { + unsigned long thresh = sysctl_sched_latency; + + /* + * convert the sleeper threshold into virtual time + */ if (sched_feat(NORMALIZED_SLEEPER)) - vruntime -= calc_delta_weight(sysctl_sched_latency, se); - else - vruntime -= sysctl_sched_latency; + thresh = calc_delta_fair(thresh, se); + + vruntime -= thresh; } /* ensure we never gain time by being placed backwards. */ |