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x86/fpu: Rename drop_init_fpu() to fpu_reset_state()

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Call it what it does and in accordance with the context where it is
used: we reset the FPU state either because we were unable to restore it
from the one saved in the task or because we simply want to reset it.

Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Borislav Petkov 2015-03-16 10:21:55 +01:00 • committed by Ingo Molnar
parent d2d0ac9a46
commit b85e67d148
5 changed files with 11 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

8
arch/x86/include/asm/fpu-internal.h
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@ -406,7 +406,11 @@ static inline void restore_init_xstate(void)
fxrstor_checking(&init_xstate_buf->i387);
}
static inline void drop_init_fpu(struct task_struct *tsk)
/*
* Reset the FPU state in the eager case and drop it in the lazy case (later use
* will reinit it).
*/
static inline void fpu_reset_state(struct task_struct *tsk)
{
if (!use_eager_fpu())
drop_fpu(tsk);
@ -480,7 +484,7 @@ static inline void switch_fpu_finish(struct task_struct *new, fpu_switch_t fpu)
{
if (fpu.preload) {
if (unlikely(restore_fpu_checking(new)))
drop_init_fpu(new);
fpu_reset_state(new);
}
}