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.

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.
  */