diff options
| author | Catalin Marinas <catalin.marinas@arm.com> | 2011-04-06 16:16:29 +0100 |
|---|---|---|
| committer | Nicolas Pitre <nicolas.pitre@linaro.org> | 2011-04-12 14:30:49 -0400 |
| commit | 5038273786d348f0c89998cd03f9707341ae2dc1 (patch) | |
| tree | a4318de3b383e403138a213e9e027a06c933f8eb | |
| parent | 3011c378f591a76e57890a8a6a312fc57ad3cff5 (diff) | |
ARM: 6867/1: Introduce THREAD_NOTIFY_COPY for copy_thread() hooks
This patch adds THREAD_NOTIFY_COPY for calling registered handlers
during the copy_thread() function call. It also changes the VFP handler
to use a switch statement rather than if..else and ignore this event.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
(cherry picked from commit 2e82669acf03e5bf2080f5d3ef005168e67d8a51)
| -rw-r--r-- | arch/arm/include/asm/thread_notify.h | 1 | ||||
| -rw-r--r-- | arch/arm/kernel/process.c | 2 | ||||
| -rw-r--r-- | arch/arm/vfp/vfpmodule.c | 22 |
3 files changed, 18 insertions, 7 deletions
diff --git a/arch/arm/include/asm/thread_notify.h b/arch/arm/include/asm/thread_notify.h index c4391ba2035..1dc98067589 100644 --- a/arch/arm/include/asm/thread_notify.h +++ b/arch/arm/include/asm/thread_notify.h @@ -43,6 +43,7 @@ static inline void thread_notify(unsigned long rc, struct thread_info *thread) #define THREAD_NOTIFY_FLUSH 0 #define THREAD_NOTIFY_EXIT 1 #define THREAD_NOTIFY_SWITCH 2 +#define THREAD_NOTIFY_COPY 3 #endif #endif diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c index fe2277c5d8c..c546aa559ff 100644 --- a/arch/arm/kernel/process.c +++ b/arch/arm/kernel/process.c @@ -375,6 +375,8 @@ copy_thread(unsigned long clone_flags, unsigned long stack_start, if (clone_flags & CLONE_SETTLS) thread->tp_value = regs->ARM_r3; + thread_notify(THREAD_NOTIFY_COPY, thread); + return 0; } diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c index bbf3da012af..1c88bbdfd34 100644 --- a/arch/arm/vfp/vfpmodule.c +++ b/arch/arm/vfp/vfpmodule.c @@ -104,12 +104,17 @@ static void vfp_thread_exit(struct thread_info *thread) static int vfp_notifier(struct notifier_block *self, unsigned long cmd, void *v) { struct thread_info *thread = v; + u32 fpexc; +#ifdef CONFIG_SMP + unsigned int cpu; +#endif - if (likely(cmd == THREAD_NOTIFY_SWITCH)) { - u32 fpexc = fmrx(FPEXC); + switch (cmd) { + case THREAD_NOTIFY_SWITCH: + fpexc = fmrx(FPEXC); #ifdef CONFIG_SMP - unsigned int cpu = thread->cpu; + cpu = thread->cpu; /* * On SMP, if VFP is enabled, save the old state in @@ -134,13 +139,16 @@ static int vfp_notifier(struct notifier_block *self, unsigned long cmd, void *v) * old state. */ fmxr(FPEXC, fpexc & ~FPEXC_EN); - return NOTIFY_DONE; - } + break; - if (cmd == THREAD_NOTIFY_FLUSH) + case THREAD_NOTIFY_FLUSH: vfp_thread_flush(thread); - else + break; + + case THREAD_NOTIFY_EXIT: vfp_thread_exit(thread); + break; + } return NOTIFY_DONE; } |