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x86/fpu: Use 'struct fpu' in __fpu_save() 

Migrate this function to pure 'struct fpu' usage.

Reviewed-by: Borislav Petkov <bp@alien8.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2015-04-23 17:52:36 +02:00
parent 2d75bcf314
commit a4d8fc2e06
1 changed files with 10 additions and 10 deletions
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20
arch/x86/kernel/fpu/core.c
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@ -125,15 +125,15 @@ void __kernel_fpu_end(void)
}
EXPORT_SYMBOL(__kernel_fpu_end);
static void __save_fpu(struct task_struct *tsk)
static void __save_fpu(struct fpu *fpu)
{
if (use_xsave()) {
if (unlikely(system_state == SYSTEM_BOOTING))
xsave_state_booting(&tsk->thread.fpu.state->xsave);
xsave_state_booting(&fpu->state->xsave);
else
xsave_state(&tsk->thread.fpu.state->xsave);
xsave_state(&fpu->state->xsave);
} else {
fpu_fxsave(&tsk->thread.fpu);
fpu_fxsave(fpu);
}
}
@ -151,7 +151,7 @@ void fpu__save(struct task_struct *tsk)
preempt_disable();
if (fpu->has_fpu) {
if (use_eager_fpu()) {
__save_fpu(tsk);
__save_fpu(fpu);
} else {
fpu_save_init(fpu);
__thread_fpu_end(fpu);
@ -231,17 +231,17 @@ EXPORT_SYMBOL_GPL(fpstate_free);
*/
static void fpu_copy(struct task_struct *dst, struct task_struct *src)
{
struct fpu *dst_fpu = &dst->thread.fpu;
struct fpu *src_fpu = &src->thread.fpu;
WARN_ON(src != current);
if (use_eager_fpu()) {
memset(&dst->thread.fpu.state->xsave, 0, xstate_size);
__save_fpu(dst);
__save_fpu(dst_fpu);
} else {
struct fpu *dfpu = &dst->thread.fpu;
struct fpu *sfpu = &src->thread.fpu;
fpu__save(src);
memcpy(dfpu->state, sfpu->state, xstate_size);
memcpy(dst_fpu->state, src_fpu->state, xstate_size);
}
}