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x86: unify restore_fpu_checking 

Impact: cleanup

On x86_32, separate f*rstor to an inline function which makes
restore_fpu_checking the same on both platforms -> move it
outside the ifdefs.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
LKML-Reference: <1239190320-23952-2-git-send-email-jirislaby@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jiri Slaby 2009-04-08 13:31:59 +02:00 committed by Ingo Molnar
parent fcb2ac5bdf
commit 34ba476a01
1 changed files with 12 additions and 12 deletions
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24
arch/x86/include/asm/i387.h
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@ -75,14 +75,6 @@ static inline int fxrstor_checking(struct i387_fxsave_struct *fx)
return err;
}
static inline int restore_fpu_checking(struct task_struct *tsk)
{
if (task_thread_info(tsk)->status & TS_XSAVE)
return xrstor_checking(&tsk->thread.xstate->xsave);
else
return fxrstor_checking(&tsk->thread.xstate->fxsave);
}
/* AMD CPUs don't save/restore FDP/FIP/FOP unless an exception
is pending. Clear the x87 state here by setting it to fixed
values. The kernel data segment can be sometimes 0 and sometimes
@ -185,10 +177,9 @@ static inline void tolerant_fwait(void)
asm volatile("fnclex ; fwait");
}
static inline int restore_fpu_checking(struct task_struct *tsk)
/* perform fxrstor iff the processor has extended states, otherwise frstor */
static inline int fxrstor_checking(struct i387_fxsave_struct *fx)
{
if (task_thread_info(tsk)->status & TS_XSAVE)
return xrstor_checking(&tsk->thread.xstate->xsave);
/*
* The "nop" is needed to make the instructions the same
* length.
@ -197,7 +188,8 @@ static inline int restore_fpu_checking(struct task_struct *tsk)
"nop ; frstor %1",
"fxrstor %1",
X86_FEATURE_FXSR,
"m" (tsk->thread.xstate->fxsave));
"m" (*fx));
return 0;
}
@ -261,6 +253,14 @@ end:
#endif /* CONFIG_X86_64 */
static inline int restore_fpu_checking(struct task_struct *tsk)
{
if (task_thread_info(tsk)->status & TS_XSAVE)
return xrstor_checking(&tsk->thread.xstate->xsave);
else
return fxrstor_checking(&tsk->thread.xstate->fxsave);
}
/*
* Signal frame handlers...
*/