x86/headers: Convert sigcontext_ia32 uses to sigcontext_32

Use the new name in kernel code, and move the old name to the
user-space-only legacy section of the UAPI header.

Acked-by: Mikko Rapeli <mikko.rapeli@iki.fi>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.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>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/1441438363-9999-14-git-send-email-mingo@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

Author: ingomolnar

arch/x86/ia32/ia32_signal.c

@@ -68,7 +68,7 @@
 }
 
 static int ia32_restore_sigcontext(struct pt_regs *regs,
-				   struct sigcontext_ia32 __user *sc)
+				   struct sigcontext_32 __user *sc)
 {
 	unsigned int tmpflags, err = 0;
 	void __user *buf;
@@ -170,7 +170,7 @@ asmlinkage long sys32_rt_sigreturn(void)
  * Set up a signal frame.
  */
 
-static int ia32_setup_sigcontext(struct sigcontext_ia32 __user *sc,
+static int ia32_setup_sigcontext(struct sigcontext_32 __user *sc,
 				 void __user *fpstate,
 				 struct pt_regs *regs, unsigned int mask)
 {

arch/x86/include/asm/ia32.h

@@ -18,7 +18,7 @@ struct ucontext_ia32 {
 	unsigned int	  uc_flags;
 	unsigned int 	  uc_link;
 	compat_stack_t	  uc_stack;
-	struct sigcontext_ia32 uc_mcontext;
+	struct sigcontext_32 uc_mcontext;
 	compat_sigset_t	  uc_sigmask;	/* mask last for extensibility */
 };
 

arch/x86/include/asm/sigframe.h

@@ -22,7 +22,7 @@
 struct sigframe_ia32 {
 	u32 pretcode;
 	int sig;
-	struct sigcontext_ia32 sc;
+	struct sigcontext_32 sc;
 	/*
 	 * fpstate is unused. fpstate is moved/allocated after
 	 * retcode[] below. This movement allows to have the FP state and the

arch/x86/include/uapi/asm/sigcontext.h

@@ -190,6 +190,9 @@ struct _xstate {
 	/* New processor state extensions go here: */
 };
 
+/*
+ * The 32-bit signal frame:
+ */
 struct sigcontext_32 {
 	__u16				gs, __gsh;
 	__u16				fs, __fsh;
@@ -223,8 +226,9 @@ struct sigcontext_32 {
 	__u32				cr2;
 };
 
-#define sigcontext_ia32 sigcontext_32
-
+/*
+ * The 64-bit signal frame:
+ */
 struct sigcontext_64 {
 	__u64				r8;
 	__u64				r9;
@@ -282,7 +286,9 @@ struct sigcontext_64 {
  */
 #ifndef __KERNEL__
 
-#define _fpstate_ia32 _fpstate_32
+#define _fpstate_ia32			_fpstate_32
+#define sigcontext_ia32			sigcontext_32
+
 
 # ifdef __i386__
 struct sigcontext {

arch/x86/kernel/asm-offsets.c

@@ -43,15 +43,15 @@ void common(void) {
 
 #if defined(CONFIG_X86_32) || defined(CONFIG_IA32_EMULATION)
 	BLANK();
-	OFFSET(IA32_SIGCONTEXT_ax, sigcontext_ia32, ax);
-	OFFSET(IA32_SIGCONTEXT_bx, sigcontext_ia32, bx);
-	OFFSET(IA32_SIGCONTEXT_cx, sigcontext_ia32, cx);
-	OFFSET(IA32_SIGCONTEXT_dx, sigcontext_ia32, dx);
-	OFFSET(IA32_SIGCONTEXT_si, sigcontext_ia32, si);
-	OFFSET(IA32_SIGCONTEXT_di, sigcontext_ia32, di);
-	OFFSET(IA32_SIGCONTEXT_bp, sigcontext_ia32, bp);
-	OFFSET(IA32_SIGCONTEXT_sp, sigcontext_ia32, sp);
-	OFFSET(IA32_SIGCONTEXT_ip, sigcontext_ia32, ip);
+	OFFSET(IA32_SIGCONTEXT_ax, sigcontext_32, ax);
+	OFFSET(IA32_SIGCONTEXT_bx, sigcontext_32, bx);
+	OFFSET(IA32_SIGCONTEXT_cx, sigcontext_32, cx);
+	OFFSET(IA32_SIGCONTEXT_dx, sigcontext_32, dx);
+	OFFSET(IA32_SIGCONTEXT_si, sigcontext_32, si);
+	OFFSET(IA32_SIGCONTEXT_di, sigcontext_32, di);
+	OFFSET(IA32_SIGCONTEXT_bp, sigcontext_32, bp);
+	OFFSET(IA32_SIGCONTEXT_sp, sigcontext_32, sp);
+	OFFSET(IA32_SIGCONTEXT_ip, sigcontext_32, ip);
 
 	BLANK();
 	OFFSET(TI_sysenter_return, thread_info, sysenter_return);