From: Ingo Molnar <mingo@kernel.org>
Date: Thu, 23 Apr 2015 15:34:20 +0000 (+0200)
Subject: x86/fpu: Use 'struct fpu' in fpu_reset_state()
X-Git-Tag: omap-for-v4.3/legacy-v2-signed~203^2~193
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=af2d94fddcf41e879908b35a8a5308fb94e989c5;p=pandora-kernel.git

x86/fpu: Use 'struct fpu' in fpu_reset_state()

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/include/asm/fpu-internal.h b/arch/x86/include/asm/fpu-internal.h
index 2d7934e4e394..579f7d0a399d 100644
--- a/arch/x86/include/asm/fpu-internal.h
+++ b/arch/x86/include/asm/fpu-internal.h
@@ -380,10 +380,8 @@ static inline void restore_init_xstate(void)
  * Reset the FPU state in the eager case and drop it in the lazy case (later use
  * will reinit it).
  */
-static inline void fpu_reset_state(struct task_struct *tsk)
+static inline void fpu_reset_state(struct fpu *fpu)
 {
-	struct fpu *fpu = &tsk->thread.fpu;
-
 	if (!use_eager_fpu())
 		drop_fpu(fpu);
 	else
@@ -460,7 +458,7 @@ static inline void switch_fpu_finish(struct task_struct *new, fpu_switch_t fpu)
 
 	if (fpu.preload) {
 		if (unlikely(restore_fpu_checking(new_fpu)))
-			fpu_reset_state(new);
+			fpu_reset_state(new_fpu);
 	}
 }
 
diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c
index 1ecd25028079..41c92897f574 100644
--- a/arch/x86/kernel/fpu/core.c
+++ b/arch/x86/kernel/fpu/core.c
@@ -112,12 +112,11 @@ EXPORT_SYMBOL(__kernel_fpu_begin);
 
 void __kernel_fpu_end(void)
 {
-	struct task_struct *me = current;
-	struct fpu *fpu = &me->thread.fpu;
+	struct fpu *fpu = &current->thread.fpu;
 
 	if (fpu->has_fpu) {
 		if (WARN_ON(restore_fpu_checking(fpu)))
-			fpu_reset_state(me);
+			fpu_reset_state(fpu);
 	} else if (!use_eager_fpu()) {
 		stts();
 	}
@@ -371,7 +370,7 @@ void fpu__restore(void)
 	kernel_fpu_disable();
 	__thread_fpu_begin(fpu);
 	if (unlikely(restore_fpu_checking(fpu))) {
-		fpu_reset_state(tsk);
+		fpu_reset_state(fpu);
 		force_sig_info(SIGSEGV, SEND_SIG_PRIV, tsk);
 	} else {
 		tsk->thread.fpu.counter++;
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