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| author | Ingo Molnar <mingo@kernel.org> | 2015-04-23 17:43:27 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-05-19 15:47:27 +0200 |
| commit | 384a23f939912d368d2b42e1b41992be09aaf266 (patch) | |
| tree | 76ba70899602452d2deea2c656841a5306649f4c | |
| parent | cb8818b6acb45a4e0acc2308df216f36cc5b950c (diff) | |
| download | blackbird-op-linux-384a23f939912d368d2b42e1b41992be09aaf266.tar.gz blackbird-op-linux-384a23f939912d368d2b42e1b41992be09aaf266.zip | |
x86/fpu: Use 'struct fpu' in switch_fpu_finish()
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/process_32.c | 10 | ||||
| -rw-r--r-- | arch/x86/kernel/process_64.c | 8 |
3 files changed, 13 insertions, 11 deletions
diff --git a/arch/x86/include/asm/fpu-internal.h b/arch/x86/include/asm/fpu-internal.h index 60d2c6f376f3..5fd9b3f9be0f 100644 --- a/arch/x86/include/asm/fpu-internal.h +++ b/arch/x86/include/asm/fpu-internal.h @@ -451,11 +451,9 @@ switch_fpu_prepare(struct fpu *old_fpu, struct fpu *new_fpu, int cpu) * state - all we need to do is to conditionally restore the register * state itself. */ -static inline void switch_fpu_finish(struct task_struct *new, fpu_switch_t fpu) +static inline void switch_fpu_finish(struct fpu *new_fpu, fpu_switch_t fpu_switch) { - struct fpu *new_fpu = &new->thread.fpu; - - if (fpu.preload) { + if (fpu_switch.preload) { if (unlikely(restore_fpu_checking(new_fpu))) fpu_reset_state(new_fpu); } diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c index 5b0ed71dde60..7adc314b5075 100644 --- a/arch/x86/kernel/process_32.c +++ b/arch/x86/kernel/process_32.c @@ -241,14 +241,16 @@ __visible __notrace_funcgraph struct task_struct * __switch_to(struct task_struct *prev_p, struct task_struct *next_p) { struct thread_struct *prev = &prev_p->thread, - *next = &next_p->thread; + *next = &next_p->thread; + struct fpu *prev_fpu = &prev->fpu; + struct fpu *next_fpu = &next->fpu; int cpu = smp_processor_id(); struct tss_struct *tss = &per_cpu(cpu_tss, cpu); - fpu_switch_t fpu; + fpu_switch_t fpu_switch; /* never put a printk in __switch_to... printk() calls wake_up*() indirectly */ - fpu = switch_fpu_prepare(&prev_p->thread.fpu, &next_p->thread.fpu, cpu); + fpu_switch = switch_fpu_prepare(prev_fpu, next_fpu, cpu); /* * Save away %gs. No need to save %fs, as it was saved on the @@ -318,7 +320,7 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p) if (prev->gs | next->gs) lazy_load_gs(next->gs); - switch_fpu_finish(next_p, fpu); + switch_fpu_finish(next_fpu, fpu_switch); this_cpu_write(current_task, next_p); diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index fefe65efd9d6..4504569c6c4e 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -273,12 +273,14 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p) { struct thread_struct *prev = &prev_p->thread; struct thread_struct *next = &next_p->thread; + struct fpu *prev_fpu = &prev->fpu; + struct fpu *next_fpu = &next->fpu; int cpu = smp_processor_id(); struct tss_struct *tss = &per_cpu(cpu_tss, cpu); unsigned fsindex, gsindex; - fpu_switch_t fpu; + fpu_switch_t fpu_switch; - fpu = switch_fpu_prepare(&prev_p->thread.fpu, &next_p->thread.fpu, cpu); + fpu_switch = switch_fpu_prepare(prev_fpu, next_fpu, cpu); /* We must save %fs and %gs before load_TLS() because * %fs and %gs may be cleared by load_TLS(). @@ -390,7 +392,7 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p) wrmsrl(MSR_KERNEL_GS_BASE, next->gs); prev->gsindex = gsindex; - switch_fpu_finish(next_p, fpu); + switch_fpu_finish(next_fpu, fpu_switch); /* * Switch the PDA and FPU contexts. |
