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Commit f9bc977f authored by Ingo Molnar's avatar Ingo Molnar
Browse files

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



Migrate this function to pure 'struct fpu' usage.

Reviewed-by: default avatarBorislav 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: default avatarIngo Molnar <mingo@kernel.org>
parent 0c070595

arch/x86/kernel/fpu/core.c

+4 −7
Original line number Diff line number Diff line
@@ -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;

}