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Date: Tue, 5 May 2015 18:24:45 +0200
From: Ingo Molnar <mingo@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: Andy Lutomirski <luto@...capital.net>,
Borislav Petkov <bp@...en8.de>,
Dave Hansen <dave.hansen@...ux.intel.com>,
Fenghua Yu <fenghua.yu@...el.com>,
"H. Peter Anvin" <hpa@...or.com>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Oleg Nesterov <oleg@...hat.com>,
Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH 065/208] x86/fpu: Use 'struct fpu' in fpu_copy()
Migrate this function to pure 'struct fpu' usage.
Reviewed-by: Borislav Petkov <bp@...en8.de>
Cc: Andy Lutomirski <luto@...capital.net>
Cc: Dave Hansen <dave.hansen@...ux.intel.com>
Cc: Fenghua Yu <fenghua.yu@...el.com>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Oleg Nesterov <oleg@...hat.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
arch/x86/kernel/fpu/core.c | 11 ++++-------
1 file changed, 4 insertions(+), 7 deletions(-)
diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c
index 92cee0c18dc6..cfc2af98bcde 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;
}
--
2.1.0
--
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