x86/fpu: Move __save_fpu() into fpu/core.c

This helper function is only used in fpu/core.c, move it there.

This slightly speeds up compilation.
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>

arch/x86/include/asm/fpu-internal.h

@@ -501,17 +501,6 @@ static inline void user_fpu_begin(void)
 	preempt_enable();
 }
 
-static inline void __save_fpu(struct task_struct *tsk)
-{
-	if (use_xsave()) {
-		if (unlikely(system_state == SYSTEM_BOOTING))
-			xsave_state_booting(&tsk->thread.fpu.state->xsave);
-		else
-			xsave_state(&tsk->thread.fpu.state->xsave);
-	} else
-		fpu_fxsave(&tsk->thread.fpu);
-}
-
 /*
  * i387 state interaction
  */

arch/x86/kernel/fpu/core.c

@@ -125,6 +125,18 @@ void __kernel_fpu_end(void)
 }
 EXPORT_SYMBOL(__kernel_fpu_end);
 
+static void __save_fpu(struct task_struct *tsk)
+{
+	if (use_xsave()) {
+		if (unlikely(system_state == SYSTEM_BOOTING))
+			xsave_state_booting(&tsk->thread.fpu.state->xsave);
+		else
+			xsave_state(&tsk->thread.fpu.state->xsave);
+	} else {
+		fpu_fxsave(&tsk->thread.fpu);
+	}
+}
+
 /*
  * Save the FPU state (initialize it if necessary):
  *