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| author | Linus Torvalds <torvalds@evo.osdl.org> | 2005-07-22 22:06:16 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@evo.osdl.org> | 2005-07-22 22:06:16 +0200 |
| commit | 8ed1383fb7b6685968588141d5934e0e6715e954 (patch) | |
| tree | 7ee8476ec114dbab907e3acf4e8a9d0342bf6751 /arch/i386/kernel/i387.c | |
| parent | Fix up incorrect "unlikely()" on %gs reload in x86 __switch_to (diff) | |
| download | linux-8ed1383fb7b6685968588141d5934e0e6715e954.tar.xz linux-8ed1383fb7b6685968588141d5934e0e6715e954.zip | |
x86: make restore_fpu() use alternative assembler instructions
It's really just a single instruction, conditional on whether the CPU
supports FXSR or not, so implement it as such instead of making it a
function that queries FXSR dynamically.
This means that the instruction just gets automatically rewritten to the
correct one at boot-time.
Diffstat (limited to 'arch/i386/kernel/i387.c')
| -rw-r--r-- | arch/i386/kernel/i387.c | 11 |
1 files changed, 0 insertions, 11 deletions
diff --git a/arch/i386/kernel/i387.c b/arch/i386/kernel/i387.c index b817168d9c62..d75524758daf 100644 --- a/arch/i386/kernel/i387.c +++ b/arch/i386/kernel/i387.c @@ -82,17 +82,6 @@ void kernel_fpu_begin(void) } EXPORT_SYMBOL_GPL(kernel_fpu_begin); -void restore_fpu( struct task_struct *tsk ) -{ - if ( cpu_has_fxsr ) { - asm volatile( "fxrstor %0" - : : "m" (tsk->thread.i387.fxsave) ); - } else { - asm volatile( "frstor %0" - : : "m" (tsk->thread.i387.fsave) ); - } -} - /* * FPU tag word conversions. */ |