diff options
| -rw-r--r-- | arch/arm/include/asm/thread_notify.h | 2 | ||||
| -rw-r--r-- | arch/arm/kernel/crunch.c | 2 | ||||
| -rw-r--r-- | arch/arm/kernel/process.c | 12 | ||||
| -rw-r--r-- | arch/arm/kernel/xscale-cp0.c | 2 | ||||
| -rw-r--r-- | arch/arm/vfp/vfpmodule.c | 19 |
5 files changed, 19 insertions, 18 deletions
diff --git a/arch/arm/include/asm/thread_notify.h b/arch/arm/include/asm/thread_notify.h index f27379d7f72a..c4391ba20350 100644 --- a/arch/arm/include/asm/thread_notify.h +++ b/arch/arm/include/asm/thread_notify.h @@ -41,7 +41,7 @@ static inline void thread_notify(unsigned long rc, struct thread_info *thread) * These are the reason codes for the thread notifier. */ #define THREAD_NOTIFY_FLUSH 0 -#define THREAD_NOTIFY_RELEASE 1 +#define THREAD_NOTIFY_EXIT 1 #define THREAD_NOTIFY_SWITCH 2 #endif diff --git a/arch/arm/kernel/crunch.c b/arch/arm/kernel/crunch.c index 769abe15cf91..25ef223ba7f3 100644 --- a/arch/arm/kernel/crunch.c +++ b/arch/arm/kernel/crunch.c @@ -51,7 +51,7 @@ static int crunch_do(struct notifier_block *self, unsigned long cmd, void *t) * initialised state information on the first fault. */ - case THREAD_NOTIFY_RELEASE: + case THREAD_NOTIFY_EXIT: crunch_task_release(thread); break; diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c index 0d96d0171c05..67304138a2ca 100644 --- a/arch/arm/kernel/process.c +++ b/arch/arm/kernel/process.c @@ -274,17 +274,18 @@ void show_regs(struct pt_regs * regs) __backtrace(); } +ATOMIC_NOTIFIER_HEAD(thread_notify_head); + +EXPORT_SYMBOL_GPL(thread_notify_head); + /* * Free current thread data structures etc.. */ void exit_thread(void) { + thread_notify(THREAD_NOTIFY_EXIT, current_thread_info()); } -ATOMIC_NOTIFIER_HEAD(thread_notify_head); - -EXPORT_SYMBOL_GPL(thread_notify_head); - void flush_thread(void) { struct thread_info *thread = current_thread_info(); @@ -299,9 +300,6 @@ void flush_thread(void) void release_thread(struct task_struct *dead_task) { - struct thread_info *thread = task_thread_info(dead_task); - - thread_notify(THREAD_NOTIFY_RELEASE, thread); } asmlinkage void ret_from_fork(void) __asm__("ret_from_fork"); diff --git a/arch/arm/kernel/xscale-cp0.c b/arch/arm/kernel/xscale-cp0.c index 17127db906fa..1796157e3dd5 100644 --- a/arch/arm/kernel/xscale-cp0.c +++ b/arch/arm/kernel/xscale-cp0.c @@ -70,7 +70,7 @@ static int iwmmxt_do(struct notifier_block *self, unsigned long cmd, void *t) * initialised state information on the first fault. */ - case THREAD_NOTIFY_RELEASE: + case THREAD_NOTIFY_EXIT: iwmmxt_task_release(thread); break; diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c index aed05bc3c2ea..f60a5400a25b 100644 --- a/arch/arm/vfp/vfpmodule.c +++ b/arch/arm/vfp/vfpmodule.c @@ -63,14 +63,15 @@ static void vfp_thread_flush(struct thread_info *thread) put_cpu(); } -static void vfp_thread_release(struct thread_info *thread) +static void vfp_thread_exit(struct thread_info *thread) { /* release case: Per-thread VFP cleanup. */ union vfp_state *vfp = &thread->vfpstate; - unsigned int cpu = thread->cpu; + unsigned int cpu = get_cpu(); if (last_VFP_context[cpu] == vfp) last_VFP_context[cpu] = NULL; + put_cpu(); } /* @@ -88,11 +89,13 @@ static void vfp_thread_release(struct thread_info *thread) * but may change at any time. * - we could be preempted if tree preempt rcu is enabled, so * it is unsafe to use thread->cpu. - * THREAD_NOTIFY_RELEASE: - * - the thread (v) will not be running on any CPU; it is a dead thread. - * - thread->cpu will be the last CPU the thread ran on, which may not - * be the current CPU. - * - we could be preempted if tree preempt rcu is enabled. + * THREAD_NOTIFY_EXIT + * - the thread (v) will be running on the local CPU, so + * v === current_thread_info() + * - thread->cpu is the local CPU number at the time it is accessed, + * but may change at any time. + * - we could be preempted if tree preempt rcu is enabled, so + * it is unsafe to use thread->cpu. */ static int vfp_notifier(struct notifier_block *self, unsigned long cmd, void *v) { @@ -133,7 +136,7 @@ static int vfp_notifier(struct notifier_block *self, unsigned long cmd, void *v) if (cmd == THREAD_NOTIFY_FLUSH) vfp_thread_flush(thread); else - vfp_thread_release(thread); + vfp_thread_exit(thread); return NOTIFY_DONE; } |