x86/fpu: Mark fpu__init_prepare_fx_sw_frame() as __init

mainline inclusion
from mainline-v5.16-rc1
commit 96034455
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I590ZC
CVE: NA

Intel-SIG: commit 96034455 x86/fpu: Mark fpu__init_prepare_fx_sw_frame() as __init.

--------------------------------

No need to keep it around.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NBorislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20211015011539.296435736@linutronix.deSigned-off-by: NLin Wang <lin.x.wang@intel.com>
Signed-off-by: NAichun Shi <aichun.shi@intel.com>

arch/x86/include/asm/fpu/signal.h

@@ -31,6 +31,4 @@ fpu__alloc_mathframe(unsigned long sp, int ia32_frame,
 
 unsigned long fpu__get_fpstate_size(void);
 
-extern void fpu__init_prepare_fx_sw_frame(void);
-
 #endif /* _ASM_X86_FPU_SIGNAL_H */

arch/x86/kernel/fpu/internal.h

+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __X86_KERNEL_FPU_INTERNAL_H
+#define __X86_KERNEL_FPU_INTERNAL_H
+
+/* Init functions */
+extern void fpu__init_prepare_fx_sw_frame(void);
+
+#endif

arch/x86/kernel/fpu/signal.c

@@ -16,6 +16,8 @@
 #include <asm/trapnr.h>
 #include <asm/trace/fpu.h>
 
+#include "internal.h"
+
 static struct _fpx_sw_bytes fx_sw_reserved __ro_after_init;
 static struct _fpx_sw_bytes fx_sw_reserved_ia32 __ro_after_init;
 
@@ -514,7 +516,7 @@ unsigned long fpu__get_fpstate_size(void)
  * This will be saved when ever the FP and extended state context is
  * saved on the user stack during the signal handler delivery to the user.
  */
-void fpu__init_prepare_fx_sw_frame(void)
+void __init fpu__init_prepare_fx_sw_frame(void)
 {
 	int size = fpu_user_xstate_size + FP_XSTATE_MAGIC2_SIZE;
 

arch/x86/kernel/fpu/xstate.c

@@ -19,6 +19,7 @@
 
 #include <asm/tlbflush.h>
 
+#include "internal.h"
 #include "xstate.h"
 
 #define for_each_extended_xfeature(bit, mask)				\