From 6ca7a8a15035add0a4f9b2fd658118d41dbeb20c Mon Sep 17 00:00:00 2001 From: Borislav Petkov Date: Sun, 21 Dec 2014 15:02:23 +0100 Subject: [PATCH] x86/fpu: Use a symbolic name for asm operand Fix up the else-case in fpu_fxsave() which seems like it has been overlooked. Correct comment style in restore_fpu_checking() while at it. Signed-off-by: Borislav Petkov Cc: Linus Torvalds Link: http://lkml.kernel.org/r/1419170543-11393-1-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar --- arch/x86/include/asm/fpu-internal.h | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/arch/x86/include/asm/fpu-internal.h b/arch/x86/include/asm/fpu-internal.h index e97622f57722..0dbc08282291 100644 --- a/arch/x86/include/asm/fpu-internal.h +++ b/arch/x86/include/asm/fpu-internal.h @@ -207,7 +207,7 @@ static inline void fpu_fxsave(struct fpu *fpu) if (config_enabled(CONFIG_X86_32)) asm volatile( "fxsave %[fx]" : [fx] "=m" (fpu->state->fxsave)); else if (config_enabled(CONFIG_AS_FXSAVEQ)) - asm volatile("fxsaveq %0" : "=m" (fpu->state->fxsave)); + asm volatile("fxsaveq %[fx]" : [fx] "=m" (fpu->state->fxsave)); else { /* Using "rex64; fxsave %0" is broken because, if the memory * operand uses any extended registers for addressing, a second @@ -290,9 +290,11 @@ static inline int fpu_restore_checking(struct fpu *fpu) static inline int restore_fpu_checking(struct task_struct *tsk) { - /* AMD K7/K8 CPUs don't save/restore FDP/FIP/FOP unless an exception - is pending. Clear the x87 state here by setting it to fixed - values. "m" is a random variable that should be in L1 */ + /* + * AMD K7/K8 CPUs don't save/restore FDP/FIP/FOP unless an exception is + * pending. Clear the x87 state here by setting it to fixed values. + * "m" is a random variable that should be in L1. + */ if (unlikely(static_cpu_has_bug_safe(X86_BUG_FXSAVE_LEAK))) { asm volatile( "fnclex\n\t"