[PATCH] asm/signal.h unification

New file - asm-generic/signal.h.  Contains declarations of
__sighandler_t, __sigrestore_t, SIG_DFL, SIG_IGN, SIG_ERR and default
definitions of SIG_BLOCK, SIG_UNBLOCK and SIG_SETMASK.

asm-*/signal.h switched to including it.  The only exception is
asm-parisc/signal.h that wants its own declaration of __sighandler_t;
that one is left as-is.

asm-ppc64/signal.h required one more thing - unlike everybody else it
used __sigrestorer_t instead of usual __sigrestore_t.  PPC64 switched to
common spelling.

Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/asm-mips/signal.h b/include/asm-mips/signal.h
index d813567..f2c470f 100644
--- a/include/asm-mips/signal.h
+++ b/include/asm-mips/signal.h
@@ -103,14 +103,7 @@
 #define SIG_SETMASK	3	/* for setting the signal mask */
 #define SIG_SETMASK32	256	/* Goodie from SGI for BSD compatibility:
 				   set only the low 32 bit of the sigset.  */
-
-/* Type of a signal handler.  */
-typedef void (*__sighandler_t)(int);
-
-/* Fake signal functions */
-#define SIG_DFL	((__sighandler_t)0)	/* default signal handling */
-#define SIG_IGN	((__sighandler_t)1)	/* ignore signal */
-#define SIG_ERR	((__sighandler_t)-1)	/* error return from signal */
+#include <asm-generic/signal.h>
 
 struct sigaction {
 	unsigned int	sa_flags;