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

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 02:07:15 +02:00
parent f9bc977fe7
commit c69e098b1f
3 changed files with 7 additions and 10 deletions
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2
arch/x86/include/asm/fpu-internal.h
View File

@ -535,7 +535,7 @@ extern void fpstate_cache_init(void);
extern int fpstate_alloc(struct fpu *fpu);
extern void fpstate_free(struct fpu *fpu);
extern int fpu__copy(struct task_struct *dst, struct task_struct *src);
extern int fpu__copy(struct fpu *dst_fpu, struct fpu *src_fpu);
static inline unsigned long
alloc_mathframe(unsigned long sp, int ia32_frame, unsigned long *buf_fx,

13
arch/x86/kernel/fpu/core.c
View File

@ -240,15 +240,12 @@ static void fpu_copy(struct fpu *dst_fpu, struct fpu *src_fpu)
}
}
int fpu__copy(struct task_struct *dst, struct task_struct *src)
int fpu__copy(struct fpu *dst_fpu, struct fpu *src_fpu)
{
struct fpu *dst_fpu = &dst->thread.fpu;
struct fpu *src_fpu = &src->thread.fpu;
dst->thread.fpu.counter = 0;
dst->thread.fpu.has_fpu = 0;
dst->thread.fpu.state = NULL;
dst->thread.fpu.last_cpu = -1;
dst_fpu->counter = 0;
dst_fpu->has_fpu = 0;
dst_fpu->state = NULL;
dst_fpu->last_cpu = -1;
if (src_fpu->fpstate_active) {
int err = fpstate_alloc(dst_fpu);

2
arch/x86/kernel/process.c
View File

@ -83,7 +83,7 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
{
*dst = *src;
return fpu__copy(dst, src);
return fpu__copy(&dst->thread.fpu, &src->thread.fpu);
}
void arch_release_task_struct(struct task_struct *tsk)