[PATCH 192/208] x86/fpu: Move restore_init_xstate() out of fpu/internal.h

[Ingo Molnar]

Move restore_init_xstate() next to its sole caller.

Also rename it to copy_init_fpstate_to_fpregs() and add
some comments about what it does.

Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Fenghua Yu <fenghua.yu@xxxxxxxxx>
Cc: H. Peter Anvin <hpa@xxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 arch/x86/include/asm/fpu/internal.h |  8 --------
 arch/x86/kernel/fpu/core.c          | 14 +++++++++++++-
 2 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/arch/x86/include/asm/fpu/internal.h b/arch/x86/include/asm/fpu/internal.h
index 792fdbe64179..a1810eb39afa 100644
--- a/arch/x86/include/asm/fpu/internal.h
+++ b/arch/x86/include/asm/fpu/internal.h
@@ -341,14 +341,6 @@ static inline void fpregs_deactivate(struct fpu *fpu)
 	__fpregs_deactivate_hw();
 }
 
-static inline void restore_init_xstate(void)
-{
-	if (use_xsave())
-		xrstor_state(&init_fpstate.xsave, -1);
-	else
-		fxrstor_checking(&init_fpstate.fxsave);
-}
-
 /*
  * Definitions for the eXtended Control Register instructions
  */
diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c
index 43c3f40aa447..c9878a7c21cf 100644
--- a/arch/x86/kernel/fpu/core.c
+++ b/arch/x86/kernel/fpu/core.c
@@ -392,6 +392,18 @@ void fpu__drop(struct fpu *fpu)
 }
 
 /*
+ * Clear FPU registers by setting them up from
+ * the init fpstate:
+ */
+static inline void copy_init_fpstate_to_fpregs(void)
+{
+	if (use_xsave())
+		xrstor_state(&init_fpstate.xsave, -1);
+	else
+		fxrstor_checking(&init_fpstate.fxsave);
+}
+
+/*
  * Clear the FPU state back to init state.
  *
  * Called by sys_execve(), by the signal handler code and by various
@@ -409,7 +421,7 @@ void fpu__clear(struct fpu *fpu)
 			fpu__activate_curr(fpu);
 			user_fpu_begin();
 		}
-		restore_init_xstate();
+		copy_init_fpstate_to_fpregs();
 	}
 }
 
-- 
2.1.0

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