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x86/fpu: Fold __drop_fpu() into its sole user

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Fold it into drop_fpu(). Phew, one less FPU function to pay attention
to.

No functionality change.

Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Pekka Riikonen <priikone@iki.fi>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Suresh Siddha <sbsiddha@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Borislav Petkov 2015-03-14 11:52:12 +01:00 committed by Ingo Molnar
parent f893959b08
commit d2d0ac9a46
1 changed files with 9 additions and 12 deletions
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21
arch/x86/include/asm/fpu-internal.h
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@ -378,17 +378,6 @@ static inline void __thread_fpu_begin(struct task_struct *tsk)
__thread_set_has_fpu(tsk);
}
static inline void __drop_fpu(struct task_struct *tsk)
{
if (__thread_has_fpu(tsk)) {
/* Ignore delayed exceptions from user space */
asm volatile("1: fwait\n"
"2:\n"
_ASM_EXTABLE(1b, 2b));
__thread_fpu_end(tsk);
}
}
static inline void drop_fpu(struct task_struct *tsk)
{
/*
@ -396,7 +385,15 @@ static inline void drop_fpu(struct task_struct *tsk)
*/
preempt_disable();
tsk->thread.fpu_counter = 0;
__drop_fpu(tsk);
if (__thread_has_fpu(tsk)) {
/* Ignore delayed exceptions from user space */
asm volatile("1: fwait\n"
"2:\n"
_ASM_EXTABLE(1b, 2b));
__thread_fpu_end(tsk);
}
clear_stopped_child_used_math(tsk);
preempt_enable();
}