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

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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 2015-04-24 02:07:33 +02:00
parent 0c070595ce
commit f9bc977fe7
1 changed files with 4 additions and 7 deletions
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11
arch/x86/kernel/fpu/core.c
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@ -227,15 +227,12 @@ EXPORT_SYMBOL_GPL(fpstate_free);
* In the 'lazy' case we save to the source context, mark the FPU lazy
* via stts() and copy the source context into the destination context.
*/
static void fpu_copy(struct task_struct *dst, struct task_struct *src)
static void fpu_copy(struct fpu *dst_fpu, struct fpu *src_fpu)
{
struct fpu *dst_fpu = &dst->thread.fpu;
struct fpu *src_fpu = &src->thread.fpu;
WARN_ON(src != current);
WARN_ON(src_fpu != &current->thread.fpu);
if (use_eager_fpu()) {
memset(&dst->thread.fpu.state->xsave, 0, xstate_size);
memset(&dst_fpu->state->xsave, 0, xstate_size);
__save_fpu(dst_fpu);
} else {
fpu__save(src_fpu);
@ -258,7 +255,7 @@ int fpu__copy(struct task_struct *dst, struct task_struct *src)
if (err)
return err;
fpu_copy(dst, src);
fpu_copy(dst_fpu, src_fpu);
}
return 0;
}