linux-kernel - [PATCH 050/208] x86/fpu: Remove 'struct task_struct' usage from __thread_fpu

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Date:	Tue,  5 May 2015 18:24:30 +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 050/208] x86/fpu: Remove 'struct task_struct' usage from __thread_fpu_end()

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/include/asm/fpu-internal.h | 6 +++---
 arch/x86/kernel/fpu/core.c          | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/x86/include/asm/fpu-internal.h b/arch/x86/include/asm/fpu-internal.h
index cf0d4124fb3d..b1803a656651 100644
--- a/arch/x86/include/asm/fpu-internal.h
+++ b/arch/x86/include/asm/fpu-internal.h
@@ -344,9 +344,9 @@ static inline void __thread_set_has_fpu(struct fpu *fpu)
  * These generally need preemption protection to work,
  * do try to avoid using these on their own.
  */
-static inline void __thread_fpu_end(struct task_struct *tsk)
+static inline void __thread_fpu_end(struct fpu *fpu)
 {
-	__thread_clear_has_fpu(&tsk->thread.fpu);
+	__thread_clear_has_fpu(fpu);
 	if (!use_eager_fpu())
 		stts();
 }
@@ -372,7 +372,7 @@ static inline void drop_fpu(struct task_struct *tsk)
 		asm volatile("1: fwait\n"
 			     "2:\n"
 			     _ASM_EXTABLE(1b, 2b));
-		__thread_fpu_end(tsk);
+		__thread_fpu_end(fpu);
 	}
 
 	clear_stopped_child_used_math(tsk);
diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c
index 172315e29c25..96d175101cd8 100644
--- a/arch/x86/kernel/fpu/core.c
+++ b/arch/x86/kernel/fpu/core.c
@@ -143,7 +143,7 @@ void fpu__save(struct task_struct *tsk)
 			__save_fpu(tsk);
 		} else {
 			fpu_save_init(fpu);
-			__thread_fpu_end(tsk);
+			__thread_fpu_end(fpu);
 		}
 	}
 	preempt_enable();
-- 
2.1.0

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