From a4d8fc2e0652613426920aac429541127f8b26d8 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Thu, 23 Apr 2015 17:52:36 +0200 Subject: [PATCH] x86/fpu: Use 'struct fpu' in __fpu_save() Migrate this function to pure 'struct fpu' usage. Reviewed-by: Borislav Petkov Cc: Andy Lutomirski Cc: Dave Hansen Cc: Fenghua Yu Cc: H. Peter Anvin Cc: Linus Torvalds Cc: Oleg Nesterov Cc: Peter Zijlstra Cc: Thomas Gleixner Signed-off-by: Ingo Molnar --- arch/x86/kernel/fpu/core.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c index 9db4ef349c19..7c0530082253 100644 --- a/arch/x86/kernel/fpu/core.c +++ b/arch/x86/kernel/fpu/core.c @@ -125,15 +125,15 @@ void __kernel_fpu_end(void) } EXPORT_SYMBOL(__kernel_fpu_end); -static void __save_fpu(struct task_struct *tsk) +static void __save_fpu(struct fpu *fpu) { if (use_xsave()) { if (unlikely(system_state == SYSTEM_BOOTING)) - xsave_state_booting(&tsk->thread.fpu.state->xsave); + xsave_state_booting(&fpu->state->xsave); else - xsave_state(&tsk->thread.fpu.state->xsave); + xsave_state(&fpu->state->xsave); } else { - fpu_fxsave(&tsk->thread.fpu); + fpu_fxsave(fpu); } } @@ -151,7 +151,7 @@ void fpu__save(struct task_struct *tsk) preempt_disable(); if (fpu->has_fpu) { if (use_eager_fpu()) { - __save_fpu(tsk); + __save_fpu(fpu); } else { fpu_save_init(fpu); __thread_fpu_end(fpu); @@ -231,17 +231,17 @@ EXPORT_SYMBOL_GPL(fpstate_free); */ static void fpu_copy(struct task_struct *dst, struct task_struct *src) { + struct fpu *dst_fpu = &dst->thread.fpu; + struct fpu *src_fpu = &src->thread.fpu; + WARN_ON(src != current); if (use_eager_fpu()) { memset(&dst->thread.fpu.state->xsave, 0, xstate_size); - __save_fpu(dst); + __save_fpu(dst_fpu); } else { - struct fpu *dfpu = &dst->thread.fpu; - struct fpu *sfpu = &src->thread.fpu; - fpu__save(src); - memcpy(dfpu->state, sfpu->state, xstate_size); + memcpy(dst_fpu->state, src_fpu->state, xstate_size); } } -- GitLab