diff options
| author | Ingo Molnar <mingo@kernel.org> | 2015-04-22 09:44:46 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-05-19 13:47:17 (GMT) |
| commit | 11ad19277e025f914518bc2943a240cdd37cf844 (patch) | |
| tree | 952b90814d086b5852fdadaf1d70530ff428a99f | |
| parent | 146ed598d12ac173bf5fed05ba7046812b8a8978 (diff) | |
| download | linux-11ad19277e025f914518bc2943a240cdd37cf844.tar.xz | |
x86/fpu: Remove the free_thread_xstate() complication
Use fpstate_free() directly to manage FPU state.
Only process.c was using this method, so this is a speedup as well,
as it removes the extra function call and related clobbers.
Reviewed-by: Borislav Petkov <bp@alien8.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
| -rw-r--r-- | arch/x86/include/asm/processor.h | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/process.c | 9 |
2 files changed, 2 insertions, 8 deletions
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index 6b75c4b..fef8db0 100644 --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -362,7 +362,6 @@ DECLARE_PER_CPU(struct irq_stack *, softirq_stack); #endif /* X86_64 */ extern unsigned int xstate_size; -extern void free_thread_xstate(struct task_struct *); extern struct kmem_cache *task_xstate_cachep; struct perf_event; diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c index 35d0f19..6ab180f 100644 --- a/arch/x86/kernel/process.c +++ b/arch/x86/kernel/process.c @@ -99,14 +99,9 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src) return 0; } -void free_thread_xstate(struct task_struct *tsk) -{ - fpstate_free(&tsk->thread.fpu); -} - void arch_release_task_struct(struct task_struct *tsk) { - free_thread_xstate(tsk); + fpstate_free(&tsk->thread.fpu); } void arch_task_cache_init(void) @@ -154,7 +149,7 @@ void flush_thread(void) if (!use_eager_fpu()) { /* FPU state will be reallocated lazily at the first use. */ drop_fpu(tsk); - free_thread_xstate(tsk); + fpstate_free(&tsk->thread.fpu); } else { if (!tsk_used_math(tsk)) { /* kthread execs. TODO: cleanup this horror. */ |