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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>
hifive-unleashed-5.1
Ingo Molnar 2015-04-23 17:57:24 +02:00
parent a4d8fc2e06
commit 0c070595ce
3 changed files with 5 additions and 7 deletions
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2
arch/x86/include/asm/i387.h
View File

@ -100,7 +100,7 @@ static inline int user_has_fpu(void)
return current->thread.fpu.has_fpu;
}
extern void fpu__save(struct task_struct *tsk);
extern void fpu__save(struct fpu *fpu);
#endif /* __ASSEMBLY__ */

8
arch/x86/kernel/fpu/core.c
View File

@ -142,11 +142,9 @@ static void __save_fpu(struct fpu *fpu)
*
* This only ever gets called for the current task.
*/
void fpu__save(struct task_struct *tsk)
void fpu__save(struct fpu *fpu)
{
struct fpu *fpu = &tsk->thread.fpu;
WARN_ON(tsk != current);
WARN_ON(fpu != &current->thread.fpu);
preempt_disable();
if (fpu->has_fpu) {
@ -240,7 +238,7 @@ static void fpu_copy(struct task_struct *dst, struct task_struct *src)
memset(&dst->thread.fpu.state->xsave, 0, xstate_size);
__save_fpu(dst_fpu);
} else {
fpu__save(src);
fpu__save(src_fpu);
memcpy(dst_fpu->state, src_fpu->state, xstate_size);
}
}

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

@ -730,7 +730,7 @@ static void math_error(struct pt_regs *regs, int error_code, int trapnr)
/*
* Save the info for the exception handler and clear the error.
*/
fpu__save(task);
fpu__save(&task->thread.fpu);
task->thread.trap_nr = trapnr;
task->thread.error_code = error_code;
info.si_signo = SIGFPE;