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

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 17:34:20 +02:00
parent 11f2d50b10
commit af2d94fddc
4 changed files with 8 additions and 11 deletions
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6
arch/x86/include/asm/fpu-internal.h
View File

@ -380,10 +380,8 @@ static inline void restore_init_xstate(void)
* Reset the FPU state in the eager case and drop it in the lazy case (later use
* will reinit it).
*/
static inline void fpu_reset_state(struct task_struct *tsk)
static inline void fpu_reset_state(struct fpu *fpu)
{
struct fpu *fpu = &tsk->thread.fpu;
if (!use_eager_fpu())
drop_fpu(fpu);
else
@ -460,7 +458,7 @@ static inline void switch_fpu_finish(struct task_struct *new, fpu_switch_t fpu)
if (fpu.preload) {
if (unlikely(restore_fpu_checking(new_fpu)))
fpu_reset_state(new);
fpu_reset_state(new_fpu);
}
}

7
arch/x86/kernel/fpu/core.c
View File

@ -112,12 +112,11 @@ EXPORT_SYMBOL(__kernel_fpu_begin);
void __kernel_fpu_end(void)
{
struct task_struct *me = current;
struct fpu *fpu = &me->thread.fpu;
struct fpu *fpu = &current->thread.fpu;
if (fpu->has_fpu) {
if (WARN_ON(restore_fpu_checking(fpu)))
fpu_reset_state(me);
fpu_reset_state(fpu);
} else if (!use_eager_fpu()) {
stts();
}
@ -371,7 +370,7 @@ void fpu__restore(void)
kernel_fpu_disable();
__thread_fpu_begin(fpu);
if (unlikely(restore_fpu_checking(fpu))) {
fpu_reset_state(tsk);
fpu_reset_state(fpu);
force_sig_info(SIGSEGV, SEND_SIG_PRIV, tsk);
} else {
tsk->thread.fpu.counter++;

4
arch/x86/kernel/fpu/xsave.c
View File

@ -343,7 +343,7 @@ int __restore_xstate_sig(void __user *buf, void __user *buf_fx, int size)
config_enabled(CONFIG_IA32_EMULATION));
if (!buf) {
fpu_reset_state(tsk);
fpu_reset_state(fpu);
return 0;
}
@ -417,7 +417,7 @@ int __restore_xstate_sig(void __user *buf, void __user *buf_fx, int size)
*/
user_fpu_begin();
if (restore_user_xstate(buf_fx, xstate_bv, fx_only)) {
fpu_reset_state(tsk);
fpu_reset_state(fpu);
return -1;
}
}

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

@ -667,7 +667,7 @@ handle_signal(struct ksignal *ksig, struct pt_regs *regs)
* Ensure the signal handler starts with the new fpu state.
*/
if (fpu->fpstate_active)
fpu_reset_state(current);
fpu_reset_state(fpu);
}
signal_setup_done(failed, ksig, stepping);
}