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authorIngo Molnar <mingo@kernel.org>2015-04-22 11:44:46 +0200
committerIngo Molnar <mingo@kernel.org>2015-05-19 15:47:17 +0200
commit11ad19277e025f914518bc2943a240cdd37cf844 (patch)
tree952b90814d086b5852fdadaf1d70530ff428a99f /arch/x86/kernel/process.c
parent146ed598d12ac173bf5fed05ba7046812b8a8978 (diff)
downloadlinux-11ad19277e025f914518bc2943a240cdd37cf844.tar.bz2
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>
Diffstat (limited to 'arch/x86/kernel/process.c')
-rw-r--r--arch/x86/kernel/process.c9
1 files changed, 2 insertions, 7 deletions
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 35d0f1925524..6ab180f40a7e 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. */