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

Borislav Petkov
2015-03-14T10:58:34Z

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>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Pekka Riikonen <priikone@iki.fi>
Cc: Rik van Riel <riel@redhat.com>
Cc: Suresh Siddha <sbsiddha@gmail.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Ingo Molnar <mingo@kernel.org>
---
arch/x86/include/asm/fpu-internal.h | 17 +++++++----------
1 file changed, 7 insertions(+), 10 deletions(-)

diff --git a/arch/x86/include/asm/fpu-internal.h b/arch/x86/include/asm/fpu-internal.h
index 7d2f7fa6b2dd..2d4adff428ac 100644
--- a/arch/x86/include/asm/fpu-internal.h
+++ b/arch/x86/include/asm/fpu-internal.h
@@ -378,8 +378,14 @@ static inline void __thread_fpu_begin(struct task_struct *tsk)
__thread_set_has_fpu(tsk);
}

-static inline void __drop_fpu(struct task_struct *tsk)
+static inline void drop_fpu(struct task_struct *tsk)
{
+ /*
+ * Forget coprocessor state..
+ */
+ preempt_disable();
+ tsk->thread.fpu_counter = 0;
+
if (__thread_has_fpu(tsk)) {
/* Ignore delayed exceptions from user space */
asm volatile("1: fwait\n"
@@ -387,16 +393,7 @@ static inline void __drop_fpu(struct task_struct *tsk)
_ASM_EXTABLE(1b, 2b));
__thread_fpu_end(tsk);
}
-}

-static inline void drop_fpu(struct task_struct *tsk)
-{
- /*
- * Forget coprocessor state..
- */
- preempt_disable();
- tsk->thread.fpu_counter = 0;
- __drop_fpu(tsk);
clear_stopped_child_used_math(tsk);
preempt_enable();
}
--
2.3.3

--
Regards/Gruss,
Boris.

ECO tip #101: Trim your mails when you reply.
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