[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>

22 files changed, 46 insertions, 242 deletions

diff --git a/include/asm-alpha/signal.h b/include/asm-alpha/signal.h
index 4e0842b415a..1a2c52a056f 100644
--- a/include/asm-alpha/signal.h
+++ b/include/asm-alpha/signal.h
@@ -113,16 +113,7 @@ typedef unsigned long sigset_t;
 #define SIG_UNBLOCK        2	/* for unblocking signals */
 #define SIG_SETMASK        3	/* for setting the signal mask */
 
-/* Type of a signal handler.  */
-typedef void __signalfn_t(int);
-typedef __signalfn_t __user *__sighandler_t;
-
-typedef void __restorefn_t(void);
-typedef __restorefn_t __user *__sigrestore_t;
-
-#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>
 
 #ifdef __KERNEL__
 struct osf_sigaction {
diff --git a/include/asm-arm/signal.h b/include/asm-arm/signal.h
index b860dc3c5dc..46e69ae395a 100644
--- a/include/asm-arm/signal.h
+++ b/include/asm-arm/signal.h
@@ -117,20 +117,7 @@ typedef unsigned long sigset_t;
 #define SA_IRQNOMASK		0x08000000
 #endif
 
-#define SIG_BLOCK          0	/* for blocking signals */
-#define SIG_UNBLOCK        1	/* for unblocking signals */
-#define SIG_SETMASK        2	/* for setting the signal mask */
-
-/* Type of a signal handler.  */
-typedef void __signalfn_t(int);
-typedef __signalfn_t __user *__sighandler_t;
-
-typedef void __restorefn_t(void);
-typedef __restorefn_t __user *__sigrestore_t;
-
-#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>
 
 #ifdef __KERNEL__
 struct old_sigaction {
diff --git a/include/asm-arm26/signal.h b/include/asm-arm26/signal.h
index a1aacefa656..dedb2928030 100644
--- a/include/asm-arm26/signal.h
+++ b/include/asm-arm26/signal.h
@@ -117,16 +117,7 @@ typedef unsigned long sigset_t;
 #define SA_IRQNOMASK		0x08000000
 #endif
 
-#define SIG_BLOCK          0	/* for blocking signals */
-#define SIG_UNBLOCK        1	/* for unblocking signals */
-#define SIG_SETMASK        2	/* for setting the signal mask */
-
-/* Type of a signal handler.  */
-typedef void (*__sighandler_t)(int);
-
-#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>
 
 #ifdef __KERNEL__
 struct old_sigaction {
diff --git a/include/asm-cris/signal.h b/include/asm-cris/signal.h
index 2330769ba55..dfe039593a7 100644
--- a/include/asm-cris/signal.h
+++ b/include/asm-cris/signal.h
@@ -108,16 +108,7 @@ typedef unsigned long sigset_t;
 #define MINSIGSTKSZ	2048
 #define SIGSTKSZ	8192
 
-#define SIG_BLOCK          0	/* for blocking signals */
-#define SIG_UNBLOCK        1	/* for unblocking signals */
-#define SIG_SETMASK        2	/* for setting the signal mask */
-
-/* Type of a signal handler.  */
-typedef void (*__sighandler_t)(int);
-
-#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>
 
 #ifdef __KERNEL__
 struct old_sigaction {
diff --git a/include/asm-frv/signal.h b/include/asm-frv/signal.h
index c930bb17687..d407bde57ec 100644
--- a/include/asm-frv/signal.h
+++ b/include/asm-frv/signal.h
@@ -107,16 +107,7 @@ typedef unsigned long sigset_t;
 #define MINSIGSTKSZ	2048
 #define SIGSTKSZ	8192
 
-#define SIG_BLOCK          0	/* for blocking signals */
-#define SIG_UNBLOCK        1	/* for unblocking signals */
-#define SIG_SETMASK        2	/* for setting the signal mask */
-
-/* Type of a signal handler.  */
-typedef void (*__sighandler_t)(int);
-
-#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>
 
 #ifdef __KERNEL__
 struct old_sigaction {
diff --git a/include/asm-generic/signal.h b/include/asm-generic/signal.h
new file mode 100644
index 00000000000..9418d6e9b8c
--- /dev/null
+++ b/include/asm-generic/signal.h
@@ -0,0 +1,21 @@
+#ifndef SIG_BLOCK
+#define SIG_BLOCK          0	/* for blocking signals */
+#endif
+#ifndef SIG_UNBLOCK
+#define SIG_UNBLOCK        1	/* for unblocking signals */
+#endif
+#ifndef SIG_SETMASK
+#define SIG_SETMASK        2	/* for setting the signal mask */
+#endif
+
+#ifndef __ASSEMBLY__
+typedef void __signalfn_t(int);
+typedef __signalfn_t __user *__sighandler_t;
+
+typedef void __restorefn_t(void);
+typedef __restorefn_t __user *__sigrestore_t;
+
+#define SIG_DFL	((__force __sighandler_t)0)	/* default signal handling */
+#define SIG_IGN	((__force __sighandler_t)1)	/* ignore signal */
+#define SIG_ERR	((__force __sighandler_t)-1)	/* error return from signal */
+#endif
diff --git a/include/asm-h8300/signal.h b/include/asm-h8300/signal.h
index ac3e01bd639..8eccdc17616 100644
--- a/include/asm-h8300/signal.h
+++ b/include/asm-h8300/signal.h
@@ -107,16 +107,7 @@ typedef unsigned long sigset_t;
 #define MINSIGSTKSZ	2048
 #define SIGSTKSZ	8192
 
-#define SIG_BLOCK          0	/* for blocking signals */
-#define SIG_UNBLOCK        1	/* for unblocking signals */
-#define SIG_SETMASK        2	/* for setting the signal mask */
-
-/* Type of a signal handler.  */
-typedef void (*__sighandler_t)(int);
-
-#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>
 
 #ifdef __KERNEL__
 struct old_sigaction {
diff --git a/include/asm-i386/signal.h b/include/asm-i386/signal.h
index 0f082bd1c45..cbb47d34aa3 100644
--- a/include/asm-i386/signal.h
+++ b/include/asm-i386/signal.h
@@ -110,20 +110,7 @@ typedef unsigned long sigset_t;
 #define MINSIGSTKSZ	2048
 #define SIGSTKSZ	8192
 
-#define SIG_BLOCK          0	/* for blocking signals */
-#define SIG_UNBLOCK        1	/* for unblocking signals */
-#define SIG_SETMASK        2	/* for setting the signal mask */
-
-/* Type of a signal handler.  */
-typedef void __signalfn_t(int);
-typedef __signalfn_t __user *__sighandler_t;
-
-typedef void __restorefn_t(void);
-typedef __restorefn_t __user *__sigrestore_t;
-
-#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>
 
 #ifdef __KERNEL__
 struct old_sigaction {
diff --git a/include/asm-ia64/signal.h b/include/asm-ia64/signal.h
index 85a577ae914..608168d713d 100644
--- a/include/asm-ia64/signal.h
+++ b/include/asm-ia64/signal.h
@@ -118,13 +118,7 @@
 
 #endif /* __KERNEL__ */
 
-#define SIG_BLOCK          0	/* for blocking signals */
-#define SIG_UNBLOCK        1	/* for unblocking signals */
-#define SIG_SETMASK        2	/* for setting the signal mask */
-
-#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>
 
 # ifndef __ASSEMBLY__
 
@@ -133,9 +127,6 @@
 /* Avoid too many header ordering problems.  */
 struct siginfo;
 
-/* Type of a signal handler.  */
-typedef void __user (*__sighandler_t)(int);
-
 typedef struct sigaltstack {
 	void __user *ss_sp;
 	int ss_flags;
diff --git a/include/asm-m32r/signal.h b/include/asm-m32r/signal.h
index 6e55fd42188..95f69b19195 100644
--- a/include/asm-m32r/signal.h
+++ b/include/asm-m32r/signal.h
@@ -114,20 +114,7 @@ typedef unsigned long sigset_t;
 #define MINSIGSTKSZ	2048
 #define SIGSTKSZ	8192
 
-#define SIG_BLOCK          0	/* for blocking signals */
-#define SIG_UNBLOCK        1	/* for unblocking signals */
-#define SIG_SETMASK        2	/* for setting the signal mask */
-
-/* Type of a signal handler.  */
-typedef void __signalfn_t(int);
-typedef __signalfn_t __user *__sighandler_t;
-
-typedef void __restorefn_t(void);
-typedef __restorefn_t __user *__sigrestore_t;
-
-#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>
 
 #ifdef __KERNEL__
 struct old_sigaction {
diff --git a/include/asm-m68k/signal.h b/include/asm-m68k/signal.h
index 1d016e9f19b..a0cdf908237 100644
--- a/include/asm-m68k/signal.h
+++ b/include/asm-m68k/signal.h
@@ -105,29 +105,20 @@ typedef unsigned long sigset_t;
 #define MINSIGSTKSZ	2048
 #define SIGSTKSZ	8192
 
-#define SIG_BLOCK          0	/* for blocking signals */
-#define SIG_UNBLOCK        1	/* for unblocking signals */
-#define SIG_SETMASK        2	/* for setting the signal mask */
-
-/* Type of a signal handler.  */
-typedef void (*__sighandler_t)(int);
-
-#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>
 
 #ifdef __KERNEL__
 struct old_sigaction {
 	__sighandler_t sa_handler;
 	old_sigset_t sa_mask;
 	unsigned long sa_flags;
-	void (*sa_restorer)(void);
+	__sigrestore_t sa_restorer;
 };
 
 struct sigaction {
 	__sighandler_t sa_handler;
 	unsigned long sa_flags;
-	void (*sa_restorer)(void);
+	__sigrestore_t sa_restorer;
 	sigset_t sa_mask;		/* mask last for extensibility */
 };
 
diff --git a/include/asm-m68knommu/signal.h b/include/asm-m68knommu/signal.h
index 37c9c8a024b..1d13187f606 100644
--- a/include/asm-m68knommu/signal.h
+++ b/include/asm-m68knommu/signal.h
@@ -105,16 +105,7 @@ typedef unsigned long sigset_t;
 #define MINSIGSTKSZ	2048
 #define SIGSTKSZ	8192
 
-#define SIG_BLOCK          0	/* for blocking signals */
-#define SIG_UNBLOCK        1	/* for unblocking signals */
-#define SIG_SETMASK        2	/* for setting the signal mask */
-
-/* Type of a signal handler.  */
-typedef void (*__sighandler_t)(int);
-
-#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>
 
 #ifdef __KERNEL__
 struct old_sigaction {
diff --git a/include/asm-mips/signal.h b/include/asm-mips/signal.h
index d81356731eb..f2c470f1d36 100644
--- a/include/asm-mips/signal.h
+++ b/include/asm-mips/signal.h
@@ -103,14 +103,7 @@ typedef unsigned long old_sigset_t;		/* at least 32 bits */
 #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;
diff --git a/include/asm-ppc/signal.h b/include/asm-ppc/signal.h
index d890dabd5a6..caf6ede3710 100644
--- a/include/asm-ppc/signal.h
+++ b/include/asm-ppc/signal.h
@@ -100,20 +100,7 @@ typedef struct {
 #define MINSIGSTKSZ	2048
 #define SIGSTKSZ	8192
 
-#define SIG_BLOCK          0	/* for blocking signals */
-#define SIG_UNBLOCK        1	/* for unblocking signals */
-#define SIG_SETMASK        2	/* for setting the signal mask */
-
-/* Type of a signal handler.  */
-typedef void __signalfn_t(int);
-typedef __signalfn_t __user *__sighandler_t;
-
-typedef void __restorefn_t(void);
-typedef __restorefn_t __user *__sigrestore_t;
-
-#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 old_sigaction {
 	__sighandler_t sa_handler;
diff --git a/include/asm-ppc64/signal.h b/include/asm-ppc64/signal.h
index a2d7bbb4bef..432df7dd355 100644
--- a/include/asm-ppc64/signal.h
+++ b/include/asm-ppc64/signal.h
@@ -97,33 +97,19 @@ typedef struct {
 #define MINSIGSTKSZ	2048
 #define SIGSTKSZ	8192
 
-#define SIG_BLOCK          0	/* for blocking signals */
-#define SIG_UNBLOCK        1	/* for unblocking signals */
-#define SIG_SETMASK        2	/* for setting the signal mask */
-
-/* Type of a signal handler.  */
-typedef void __sigfunction(int);
-typedef __sigfunction __user * __sighandler_t;
-
-/* Type of the restorer function */
-typedef void __sigrestorer(void);
-typedef __sigrestorer __user * __sigrestorer_t;
-
-#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 old_sigaction {
 	__sighandler_t sa_handler;
 	old_sigset_t sa_mask;
 	unsigned long sa_flags;
-	__sigrestorer_t sa_restorer;
+	__sigrestore_t sa_restorer;
 };
 
 struct sigaction {
 	__sighandler_t sa_handler;
 	unsigned long sa_flags;
-	__sigrestorer_t sa_restorer;
+	__sigrestore_t sa_restorer;
 	sigset_t sa_mask;		/* mask last for extensibility */
 };
 
diff --git a/include/asm-s390/signal.h b/include/asm-s390/signal.h
index bfed83a818c..3d6e11c6c1f 100644
--- a/include/asm-s390/signal.h
+++ b/include/asm-s390/signal.h
@@ -117,16 +117,7 @@ typedef unsigned long sigset_t;
 #define MINSIGSTKSZ     2048
 #define SIGSTKSZ        8192
 
-#define SIG_BLOCK          0    /* for blocking signals */
-#define SIG_UNBLOCK        1    /* for unblocking signals */
-#define SIG_SETMASK        2    /* for setting the signal mask */
-
-/* Type of a signal handler.  */
-typedef void (*__sighandler_t)(int);
-
-#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>
 
 #ifdef __KERNEL__
 struct old_sigaction {
diff --git a/include/asm-sh/signal.h b/include/asm-sh/signal.h
index 29f1ac1bf4d..d6e8eb0e65c 100644
--- a/include/asm-sh/signal.h
+++ b/include/asm-sh/signal.h
@@ -108,16 +108,7 @@ typedef unsigned long sigset_t;
 #define MINSIGSTKSZ	2048
 #define SIGSTKSZ	8192
 
-#define SIG_BLOCK          0	/* for blocking signals */
-#define SIG_UNBLOCK        1	/* for unblocking signals */
-#define SIG_SETMASK        2	/* for setting the signal mask */
-
-/* Type of a signal handler.  */
-typedef void (*__sighandler_t)(int);
-
-#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>
 
 #ifdef __KERNEL__
 struct old_sigaction {
diff --git a/include/asm-sh64/signal.h b/include/asm-sh64/signal.h
index 864c94ecc98..2400dc688a6 100644
--- a/include/asm-sh64/signal.h
+++ b/include/asm-sh64/signal.h
@@ -107,16 +107,7 @@ typedef struct {
 #define MINSIGSTKSZ	2048
 #define SIGSTKSZ	THREAD_SIZE
 
-#define SIG_BLOCK          0	/* for blocking signals */
-#define SIG_UNBLOCK        1	/* for unblocking signals */
-#define SIG_SETMASK        2	/* for setting the signal mask */
-
-/* Type of a signal handler.  */
-typedef void (*__sighandler_t)(int);
-
-#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>
 
 #ifdef __KERNEL__
 struct old_sigaction {
diff --git a/include/asm-sparc/signal.h b/include/asm-sparc/signal.h
index f792e10e704..aa9960ad0ca 100644
--- a/include/asm-sparc/signal.h
+++ b/include/asm-sparc/signal.h
@@ -174,16 +174,7 @@ struct sigstack {
 #define SA_STATIC_ALLOC		0x80
 #endif
 
-/* Type of a signal handler.  */
-#ifdef __KERNEL__
-typedef void (*__sighandler_t)(int, int, struct sigcontext *, char *);
-#else
-typedef void (*__sighandler_t)(int);
-#endif
-
-#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>
 
 #ifdef __KERNEL__
 struct __new_sigaction {
diff --git a/include/asm-sparc64/signal.h b/include/asm-sparc64/signal.h
index 466d021d703..becdf1bc592 100644
--- a/include/asm-sparc64/signal.h
+++ b/include/asm-sparc64/signal.h
@@ -177,21 +177,7 @@ struct sigstack {
 #define SA_STATIC_ALLOC		0x80
 #endif
 
-/* Type of a signal handler.  */
-#ifdef __KERNEL__
-typedef void __signalfn_t(int);
-typedef __signalfn_t __user *__sighandler_t;
-
-typedef void __restorefn_t(void);
-typedef __restorefn_t __user *__sigrestore_t;
-#else
-typedef void (*__sighandler_t)(int);
-typedef void (*__sigrestore_t)(void);
-#endif
-
-#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 __new_sigaction {
 	__sighandler_t		sa_handler;
diff --git a/include/asm-v850/signal.h b/include/asm-v850/signal.h
index ec3566c875d..cb52caa6992 100644
--- a/include/asm-v850/signal.h
+++ b/include/asm-v850/signal.h
@@ -110,17 +110,7 @@ typedef unsigned long sigset_t;
 #define MINSIGSTKSZ	2048
 #define SIGSTKSZ	8192
 
-#define SIG_BLOCK          0	/* for blocking signals */
-#define SIG_UNBLOCK        1	/* for unblocking signals */
-#define SIG_SETMASK        2	/* for setting the signal mask */
-
-/* Type of a signal handler.  */
-typedef void (*__sighandler_t)(int);
-
-#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>
 
 #ifdef __KERNEL__
 
diff --git a/include/asm-x86_64/signal.h b/include/asm-x86_64/signal.h
index 4987ad8082b..fe9b96d9481 100644
--- a/include/asm-x86_64/signal.h
+++ b/include/asm-x86_64/signal.h
@@ -116,21 +116,9 @@ typedef unsigned long sigset_t;
 #define MINSIGSTKSZ	2048
 #define SIGSTKSZ	8192
 
-#define SIG_BLOCK          0	/* for blocking signals */
-#define SIG_UNBLOCK        1	/* for unblocking signals */
-#define SIG_SETMASK        2	/* for setting the signal mask */
+#include <asm-generic/signal.h>
 
 #ifndef __ASSEMBLY__
-/* Type of a signal handler.  */
-typedef void __signalfn_t(int);
-typedef __signalfn_t __user *__sighandler_t;
-
-typedef void __restorefn_t(void);
-typedef __restorefn_t __user *__sigrestore_t;
-
-#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 */
 
 struct sigaction {
 	__sighandler_t sa_handler;