diff options
| author | Ingo Molnar <mingo@kernel.org> | 2015-04-23 15:34:20 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-05-19 13:47:26 (GMT) |
| commit | af2d94fddcf41e879908b35a8a5308fb94e989c5 (patch) | |
| tree | 903b84bbf46b3720b5e51505baa4bbb40e1fee2b | |
| parent | 11f2d50b10289f49676ec07bf3fef932473ef6d5 (diff) | |
| download | linux-af2d94fddcf41e879908b35a8a5308fb94e989c5.tar.xz | |
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>
| -rw-r--r-- | arch/x86/include/asm/fpu-internal.h | 6 | ||||
| -rw-r--r-- | arch/x86/kernel/fpu/core.c | 7 | ||||
| -rw-r--r-- | arch/x86/kernel/fpu/xsave.c | 4 | ||||
| -rw-r--r-- | arch/x86/kernel/signal.c | 2 |
4 files changed, 8 insertions, 11 deletions
diff --git a/arch/x86/include/asm/fpu-internal.h b/arch/x86/include/asm/fpu-internal.h index 2d7934e4..579f7d0 100644 --- a/arch/x86/include/asm/fpu-internal.h +++ b/arch/x86/include/asm/fpu-internal.h @@ -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); } } diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c index 1ecd250..41c9289 100644 --- a/arch/x86/kernel/fpu/core.c +++ b/arch/x86/kernel/fpu/core.c @@ -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 = ¤t->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++; diff --git a/arch/x86/kernel/fpu/xsave.c b/arch/x86/kernel/fpu/xsave.c index 049dc61..3953cbf 100644 --- a/arch/x86/kernel/fpu/xsave.c +++ b/arch/x86/kernel/fpu/xsave.c @@ -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; } } diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c index 20a9d35..bcb853e 100644 --- a/arch/x86/kernel/signal.c +++ b/arch/x86/kernel/signal.c @@ -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); } |