x86/fpu: Make init_fpu() static

Now that the allocation users have been split off into a separate
function, init_fpu() has become local to i387.c: make it static.
Reviewed-by: NBorislav 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: NIngo Molnar <mingo@kernel.org>

arch/x86/include/asm/i387.h

@@ -20,8 +20,6 @@ struct user_i387_struct;
 
 extern int fpstate_alloc_init(struct task_struct *curr);
 
-extern int init_fpu(struct task_struct *child);
-
 extern void fpu_finit(struct fpu *fpu);
 extern int dump_fpu(struct pt_regs *, struct user_i387_struct *);
 extern void math_state_restore(void);

arch/x86/kernel/i387.c

@@ -283,7 +283,7 @@ EXPORT_SYMBOL_GPL(fpstate_alloc_init);
  * value at reset if we support XMM instructions and then
  * remember the current task has used the FPU.
  */
-int init_fpu(struct task_struct *tsk)
+static int init_fpu(struct task_struct *tsk)
 {
 	int ret;
 
@@ -306,7 +306,6 @@ int init_fpu(struct task_struct *tsk)
 	set_stopped_child_used_math(tsk);
 	return 0;
 }
-EXPORT_SYMBOL_GPL(init_fpu);
 
 /*
  * The xstateregs_active() routine is the same as the fpregs_active() routine,