From: Ingo Molnar <mingo@kernel.org> Date: Fri, 24 Apr 2015 00:07:33 +0000 (+0200) Subject: x86/fpu: Use 'struct fpu' in fpu_copy() X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=f9bc977fe734772a7ca4a467fe4fd74e1ea3a849;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git x86/fpu: Use 'struct fpu' in fpu_copy() 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> --- diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c index b685e9e90491..9aaba6abfae3 100644 --- a/arch/x86/kernel/fpu/core.c +++ b/arch/x86/kernel/fpu/core.c @@ -227,15 +227,12 @@ EXPORT_SYMBOL_GPL(fpstate_free); * In the 'lazy' case we save to the source context, mark the FPU lazy * via stts() and copy the source context into the destination context. */ -static void fpu_copy(struct task_struct *dst, struct task_struct *src) +static void fpu_copy(struct fpu *dst_fpu, struct fpu *src_fpu) { - struct fpu *dst_fpu = &dst->thread.fpu; - struct fpu *src_fpu = &src->thread.fpu; - - WARN_ON(src != current); + WARN_ON(src_fpu != ¤t->thread.fpu); if (use_eager_fpu()) { - memset(&dst->thread.fpu.state->xsave, 0, xstate_size); + memset(&dst_fpu->state->xsave, 0, xstate_size); __save_fpu(dst_fpu); } else { fpu__save(src_fpu); @@ -258,7 +255,7 @@ int fpu__copy(struct task_struct *dst, struct task_struct *src) if (err) return err; - fpu_copy(dst, src); + fpu_copy(dst_fpu, src_fpu); } return 0; }