x86/headers: Clean up the kernel's struct sigcontext types to be ABI-clean

Use the __u16/32/64 types we standardized on in ABI definitions
and which other sigcontext related types are already using.

This will help unify struct sigcontext types between native
32-bit, compat and 64-bit kernels.

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/1441438363-9999-10-git-send-email-mingo@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

arch/x86/include/asm/sigcontext.h

@@ -5,25 +5,25 @@
 
 #ifdef __i386__
 struct sigcontext {
-	unsigned short gs, __gsh;
-	unsigned short fs, __fsh;
-	unsigned short es, __esh;
-	unsigned short ds, __dsh;
-	unsigned long di;
-	unsigned long si;
-	unsigned long bp;
-	unsigned long sp;
-	unsigned long bx;
-	unsigned long dx;
-	unsigned long cx;
-	unsigned long ax;
-	unsigned long trapno;
-	unsigned long err;
-	unsigned long ip;
-	unsigned short cs, __csh;
-	unsigned long flags;
-	unsigned long sp_at_signal;
-	unsigned short ss, __ssh;
+	__u16				 gs, __gsh;
+	__u16				 fs, __fsh;
+	__u16				 es, __esh;
+	__u16				 ds, __dsh;
+	__u32				 di;
+	__u32				 si;
+	__u32				 bp;
+	__u32				 sp;
+	__u32				 bx;
+	__u32				 dx;
+	__u32				 cx;
+	__u32				 ax;
+	__u32				 trapno;
+	__u32				 err;
+	__u32				 ip;
+	__u16				 cs, __csh;
+	__u32				 flags;
+	__u32				 sp_at_signal;
+	__u16				 ss, __ssh;
 
 	/*
 	 * fpstate is really (struct _fpstate *) or (struct _xstate *)
@@ -32,38 +32,38 @@ struct sigcontext {
 	 * of extended memory layout. See comments at the definition of
 	 * (struct _fpx_sw_bytes)
 	 */
-	void __user *fpstate;		/* zero when no FPU/extended context */
-	unsigned long oldmask;
-	unsigned long cr2;
+	void __user			*fpstate; /* Zero when no FPU/extended context */
+	__u32				 oldmask;
+	__u32				 cr2;
 };
-#else /* __i386__ */
+#else /* __x86_64__: */
 struct sigcontext {
-	unsigned long r8;
-	unsigned long r9;
-	unsigned long r10;
-	unsigned long r11;
-	unsigned long r12;
-	unsigned long r13;
-	unsigned long r14;
-	unsigned long r15;
-	unsigned long di;
-	unsigned long si;
-	unsigned long bp;
-	unsigned long bx;
-	unsigned long dx;
-	unsigned long ax;
-	unsigned long cx;
-	unsigned long sp;
-	unsigned long ip;
-	unsigned long flags;
-	unsigned short cs;
-	unsigned short gs;
-	unsigned short fs;
-	unsigned short __pad0;
-	unsigned long err;
-	unsigned long trapno;
-	unsigned long oldmask;
-	unsigned long cr2;
+	__u64				 r8;
+	__u64				 r9;
+	__u64				 r10;
+	__u64				 r11;
+	__u64				 r12;
+	__u64				 r13;
+	__u64				 r14;
+	__u64				 r15;
+	__u64				 di;
+	__u64				 si;
+	__u64				 bp;
+	__u64				 bx;
+	__u64				 dx;
+	__u64				 ax;
+	__u64				 cx;
+	__u64				 sp;
+	__u64				 ip;
+	__u64				 flags;
+	__u16				 cs;
+	__u16				 gs;
+	__u16				 fs;
+	__u16				 __pad0;
+	__u64				 err;
+	__u64				 trapno;
+	__u64				 oldmask;
+	__u64				 cr2;
 
 	/*
 	 * fpstate is really (struct _fpstate *) or (struct _xstate *)
@@ -72,8 +72,8 @@ struct sigcontext {
 	 * of extended memory layout. See comments at the definition of
 	 * (struct _fpx_sw_bytes)
 	 */
-	void __user *fpstate;		/* zero when no FPU/extended context */
-	unsigned long reserved1[8];
+	void __user			*fpstate; /* Zero when no FPU/extended context */
+	__u64				 reserved1[8];
 };
-#endif /* !__i386__ */
+#endif /* !__x86_64__ */
 #endif /* _ASM_X86_SIGCONTEXT_H */