diff options
| author | Ingo Molnar <mingo@kernel.org> | 2015-04-23 17:25:44 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-05-19 15:47:26 +0200 |
| commit | 66ddc2cb0f598818b39b66867007634244322843 (patch) | |
| tree | 2d159266571e4ca9aa08a68e78c3c718fb2482cc /arch | |
| parent | x86/fpu: Remove task_disable_lazy_fpu_restore() (diff) | |
| download | linux-66ddc2cb0f598818b39b66867007634244322843.tar.xz linux-66ddc2cb0f598818b39b66867007634244322843.zip | |
x86/fpu: Use 'struct fpu' in fpu_lazy_restore()
Also rename it to fpu_want_lazy_restore(), to better indicate that
this function just tests whether we can do a lazy restore. (The old
name suggested that it was doing the lazy restore, which is not
the case.)
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')
| -rw-r--r-- | arch/x86/include/asm/fpu-internal.h | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/arch/x86/include/asm/fpu-internal.h b/arch/x86/include/asm/fpu-internal.h index 76a1f3529881..3f6d36c6ffce 100644 --- a/arch/x86/include/asm/fpu-internal.h +++ b/arch/x86/include/asm/fpu-internal.h @@ -74,10 +74,9 @@ static inline void __cpu_disable_lazy_restore(unsigned int cpu) per_cpu(fpu_fpregs_owner_ctx, cpu) = NULL; } -static inline int fpu_lazy_restore(struct task_struct *new, unsigned int cpu) +static inline int fpu_want_lazy_restore(struct fpu *fpu, unsigned int cpu) { - return &new->thread.fpu == this_cpu_read_stable(fpu_fpregs_owner_ctx) && - cpu == new->thread.fpu.last_cpu; + return fpu == this_cpu_read_stable(fpu_fpregs_owner_ctx) && cpu == fpu->last_cpu; } static inline int is_ia32_compat_frame(void) @@ -439,7 +438,7 @@ static inline fpu_switch_t switch_fpu_prepare(struct task_struct *old, struct ta old->thread.fpu.last_cpu = -1; if (fpu.preload) { new->thread.fpu.counter++; - if (fpu_lazy_restore(new, cpu)) + if (fpu_want_lazy_restore(new_fpu, cpu)) fpu.preload = 0; else prefetch(new->thread.fpu.state); |