diff options
| -rw-r--r-- | arch/x86/include/asm/fpu/internal.h | 23 | ||||
| -rw-r--r-- | arch/x86/kernel/fpu/core.c | 6 | ||||
| -rw-r--r-- | arch/x86/kernel/fpu/xstate.c | 6 | ||||
| -rw-r--r-- | arch/x86/kernel/process.c | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/signal.c | 2 |
5 files changed, 22 insertions, 17 deletions
diff --git a/arch/x86/include/asm/fpu/internal.h b/arch/x86/include/asm/fpu/internal.h index 0f17cd4e4e58..31bfda818f30 100644 --- a/arch/x86/include/asm/fpu/internal.h +++ b/arch/x86/include/asm/fpu/internal.h @@ -382,11 +382,17 @@ static inline void fpregs_deactivate(struct fpu *fpu) __fpregs_deactivate_hw(); } -static inline void drop_fpu(struct fpu *fpu) +/* + * Drops current FPU state: deactivates the fpregs and + * the fpstate. NOTE: it still leaves previous contents + * in the fpregs in the eager-FPU case. + * + * This function can be used in cases where we know that + * a state-restore is coming: either an explicit one, + * or a reschedule. + */ +static inline void fpu__drop(struct fpu *fpu) { - /* - * Forget coprocessor state.. - */ preempt_disable(); fpu->counter = 0; @@ -412,13 +418,12 @@ 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). + * Reset the FPU state back to init state. */ -static inline void fpu_reset_state(struct fpu *fpu) +static inline void fpu__reset(struct fpu *fpu) { if (!use_eager_fpu()) - drop_fpu(fpu); + fpu__drop(fpu); else restore_init_xstate(); } @@ -516,7 +521,7 @@ static inline void switch_fpu_finish(struct fpu *new_fpu, fpu_switch_t fpu_switc { if (fpu_switch.preload) { if (unlikely(restore_fpu_checking(new_fpu))) - fpu_reset_state(new_fpu); + fpu__reset(new_fpu); } } diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c index a2e2da2b08c5..bf217cde114d 100644 --- a/arch/x86/kernel/fpu/core.c +++ b/arch/x86/kernel/fpu/core.c @@ -116,7 +116,7 @@ void __kernel_fpu_end(void) if (fpu->fpregs_active) { if (WARN_ON(restore_fpu_checking(fpu))) - fpu_reset_state(fpu); + fpu__reset(fpu); } else { __fpregs_deactivate_hw(); } @@ -339,7 +339,7 @@ void fpu__restore(void) kernel_fpu_disable(); fpregs_activate(fpu); if (unlikely(restore_fpu_checking(fpu))) { - fpu_reset_state(fpu); + fpu__reset(fpu); force_sig_info(SIGSEGV, SEND_SIG_PRIV, tsk); } else { tsk->thread.fpu.counter++; @@ -360,7 +360,7 @@ void fpu__clear(struct task_struct *tsk) if (!use_eager_fpu()) { /* FPU state will be reallocated lazily at the first use. */ - drop_fpu(fpu); + fpu__drop(fpu); } else { if (!fpu->fpstate_active) { fpu__activate_curr(fpu); diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c index b8e5fee2aef3..5e3d9242bb95 100644 --- a/arch/x86/kernel/fpu/xstate.c +++ b/arch/x86/kernel/fpu/xstate.c @@ -401,7 +401,7 @@ int __restore_xstate_sig(void __user *buf, void __user *buf_fx, int size) config_enabled(CONFIG_IA32_EMULATION)); if (!buf) { - fpu_reset_state(fpu); + fpu__reset(fpu); return 0; } @@ -449,7 +449,7 @@ int __restore_xstate_sig(void __user *buf, void __user *buf_fx, int size) * We will be ready to restore/save the state only after * fpu->fpstate_active is again set. */ - drop_fpu(fpu); + fpu__drop(fpu); if (__copy_from_user(&fpu->state.xsave, buf_fx, state_size) || __copy_from_user(&env, buf, sizeof(env))) { @@ -474,7 +474,7 @@ int __restore_xstate_sig(void __user *buf, void __user *buf_fx, int size) */ user_fpu_begin(); if (restore_user_xstate(buf_fx, xfeatures, fx_only)) { - fpu_reset_state(fpu); + fpu__reset(fpu); return -1; } } diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c index 5d37c26fa89f..dde263fb2031 100644 --- a/arch/x86/kernel/process.c +++ b/arch/x86/kernel/process.c @@ -110,7 +110,7 @@ void exit_thread(void) kfree(bp); } - drop_fpu(fpu); + fpu__drop(fpu); } void flush_thread(void) diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c index 59cfc9c97491..6bf512390536 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(fpu); + fpu__reset(fpu); } signal_setup_done(failed, ksig, stepping); } |