x86/fpu/xstate: Clean up setup_xstate_comp() call

So call setup_xstate_comp() from the xstate init code, not
from the generic fpu__init_system() code.

This allows us to remove the protytype from xstate.h as well.

Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
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/xstate.h

@@ -227,6 +227,5 @@ static inline int copy_user_to_xregs(struct xregs_state __user *buf, u64 mask)
 }
 
 void *get_xsave_addr(struct xregs_state *xsave, int xstate);
-void setup_xstate_comp(void);
 
 #endif

arch/x86/kernel/fpu/init.c

@@ -262,7 +262,6 @@ void fpu__init_system(struct cpuinfo_x86 *c)
 	fpu__init_system_generic();
 	fpu__init_system_xstate_size_legacy();
 	fpu__init_system_xstate();
-	setup_xstate_comp();
 
 	fpu__init_system_ctx_switch();
 }

arch/x86/kernel/fpu/xstate.c

@@ -218,11 +218,8 @@ static void print_xstate_features(void)
  * This function sets up offsets and sizes of all extended states in
  * xsave area. This supports both standard format and compacted format
  * of the xsave aread.
- *
- * Input: void
- * Output: void
  */
-void setup_xstate_comp(void)
+static void setup_xstate_comp(void)
 {
 	unsigned int xstate_comp_sizes[sizeof(xfeatures_mask)*8];
 	int i;
@@ -355,6 +352,7 @@ void fpu__init_system_xstate(void)
 	update_regset_xstate_info(xstate_size, xfeatures_mask);
 	fpu__init_prepare_fx_sw_frame();
 	setup_init_fpu_buf();
+	setup_xstate_comp();
 
 	pr_info("x86/fpu: Enabled xstate features 0x%llx, context size is 0x%x bytes, using '%s' format.\n",
 		xfeatures_mask,