[PATCH] powerpc: Merge signal.h

Having already merged the ppc and ppc64 versions of signal.c, this
patch finishes the job by merging signal.h.  The two versions were
almost identical already.  Notable changes:
	- We use BITS_PER_LONG to correctly size sigset_t
	- Remove some uneeded #includes and struct forward
declarations.  This does mean adding an include to signal_32.c which
relied on the indirect inclusion of sigcontext.h
	- As the ppc64 version, the merged signal.h has prototypes for
do_signal() and do_signal32().  Thus remove extra prototypes from
ppc_ksyms.c which had them directly.

Built and booted on POWER5 LPAR (ARCH=ppc64 and ARCH=powerpc).  Built
for 32-bit powermac (ARCH=ppc and ARCH=powerpc) and Walnut (ARCH=ppc).
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/kernel/ppc_ksyms.c

@@ -44,6 +44,7 @@
 #include <asm/cputable.h>
 #include <asm/btext.h>
 #include <asm/div64.h>
+#include <asm/signal.h>
 
 #ifdef  CONFIG_8xx
 #include <asm/commproc.h>
@@ -56,7 +57,6 @@ extern void machine_check_exception(struct pt_regs *regs);
 extern void alignment_exception(struct pt_regs *regs);
 extern void program_check_exception(struct pt_regs *regs);
 extern void single_step_exception(struct pt_regs *regs);
-extern int do_signal(sigset_t *, struct pt_regs *);
 extern int pmac_newworld;
 extern int sys_sigreturn(struct pt_regs *regs);
 

arch/powerpc/kernel/signal_32.c

@@ -42,6 +42,7 @@
 
 #include <asm/uaccess.h>
 #include <asm/cacheflush.h>
+#include <asm/sigcontext.h>
 #ifdef CONFIG_PPC64
 #include "ppc32.h"
 #include <asm/unistd.h>

arch/ppc/kernel/ppc_ksyms.c

@@ -46,6 +46,7 @@
 #include <asm/btext.h>
 #include <asm/div64.h>
 #include <asm/xmon.h>
+#include <asm/signal.h>
 
 #ifdef  CONFIG_8xx
 #include <asm/commproc.h>
@@ -57,7 +58,6 @@ extern void machine_check_exception(struct pt_regs *regs);
 extern void alignment_exception(struct pt_regs *regs);
 extern void program_check_exception(struct pt_regs *regs);
 extern void single_step_exception(struct pt_regs *regs);
-extern int do_signal(sigset_t *, struct pt_regs *);
 extern int pmac_newworld;
 extern int sys_sigreturn(struct pt_regs *regs);
 

include/asm-ppc/signal.h → include/asm-powerpc/signal.h

-#ifndef _ASMPPC_SIGNAL_H
-#define _ASMPPC_SIGNAL_H
+#ifndef _ASM_POWERPC_SIGNAL_H
+#define _ASM_POWERPC_SIGNAL_H
 
-#ifdef __KERNEL__
 #include <linux/types.h>
-#endif /* __KERNEL__ */
-
-/* Avoid too many header ordering problems.  */
-struct siginfo;
-
-/* Most things should be clean enough to redefine this at will, if care
-   is taken to make libc match.  */
+#include <linux/config.h>
 
 #define _NSIG		64
-#define _NSIG_BPW	32
+#define _NSIG_BPW	BITS_PER_LONG
 #define _NSIG_WORDS	(_NSIG / _NSIG_BPW)
 
 typedef unsigned long old_sigset_t;		/* at least 32 bits */
@@ -77,19 +70,19 @@ typedef struct {
  * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
  * Unix names RESETHAND and NODEFER respectively.
  */
-#define SA_NOCLDSTOP	0x00000001
-#define SA_NOCLDWAIT	0x00000002
-#define SA_SIGINFO	0x00000004
-#define SA_ONSTACK	0x08000000
-#define SA_RESTART	0x10000000
-#define SA_NODEFER	0x40000000
-#define SA_RESETHAND	0x80000000
+#define SA_NOCLDSTOP	0x00000001U
+#define SA_NOCLDWAIT	0x00000002U
+#define SA_SIGINFO	0x00000004U
+#define SA_ONSTACK	0x08000000U
+#define SA_RESTART	0x10000000U
+#define SA_NODEFER	0x40000000U
+#define SA_RESETHAND	0x80000000U
 
 #define SA_NOMASK	SA_NODEFER
 #define SA_ONESHOT	SA_RESETHAND
-#define SA_INTERRUPT	0x20000000 /* dummy -- ignored */
+#define SA_INTERRUPT	0x20000000u /* dummy -- ignored */
 
-#define SA_RESTORER	0x04000000
+#define SA_RESTORER	0x04000000U
 
 /*
  * sigaltstack controls
@@ -127,10 +120,13 @@ typedef struct sigaltstack {
 } stack_t;
 
 #ifdef __KERNEL__
-#include <asm/sigcontext.h>
+struct pt_regs;
+extern int do_signal(sigset_t *oldset, struct pt_regs *regs);
+extern int do_signal32(sigset_t *oldset, struct pt_regs *regs);
 #define ptrace_signal_deliver(regs, cookie) do { } while (0)
 #endif /* __KERNEL__ */
 
+#ifndef __powerpc64__
 /*
  * These are parameters to dbg_sigreturn syscall.  They enable or
  * disable certain debugging things that can be done from signal
@@ -149,5 +145,6 @@ struct sig_dbg_op {
 
 /* Enable or disable branch tracing.  The value sets the state. */
 #define SIG_DBG_BRANCH_TRACING		2
+#endif /* ! __powerpc64__ */
 
-#endif
+#endif /* _ASM_POWERPC_SIGNAL_H */

include/asm-ppc64/signal.h

-#ifndef _ASMPPC64_SIGNAL_H
-#define _ASMPPC64_SIGNAL_H
-
-#include <linux/types.h>
-#include <linux/compiler.h>
-#include <asm/siginfo.h>
-
-/* Avoid too many header ordering problems.  */
-struct siginfo;
-
-#define _NSIG		64
-#define _NSIG_BPW	64
-#define _NSIG_WORDS	(_NSIG / _NSIG_BPW)
-
-typedef unsigned long old_sigset_t;		/* at least 32 bits */
-
-typedef struct {
-	unsigned long sig[_NSIG_WORDS];
-} sigset_t;
-
-#define SIGHUP		 1
-#define SIGINT		 2
-#define SIGQUIT		 3
-#define SIGILL		 4
-#define SIGTRAP		 5
-#define SIGABRT		 6
-#define SIGIOT		 6
-#define SIGBUS		 7
-#define SIGFPE		 8
-#define SIGKILL		 9
-#define SIGUSR1		10
-#define SIGSEGV		11
-#define SIGUSR2		12
-#define SIGPIPE		13
-#define SIGALRM		14
-#define SIGTERM		15
-#define SIGSTKFLT	16
-#define SIGCHLD		17
-#define SIGCONT		18
-#define SIGSTOP		19
-#define SIGTSTP		20
-#define SIGTTIN		21
-#define SIGTTOU		22
-#define SIGURG		23
-#define SIGXCPU		24
-#define SIGXFSZ		25
-#define SIGVTALRM	26
-#define SIGPROF		27
-#define SIGWINCH	28
-#define SIGIO		29
-#define SIGPOLL		SIGIO
-/*
-#define SIGLOST		29
-*/
-#define SIGPWR		30
-#define SIGSYS		31
-#define	SIGUNUSED	31
-
-/* These should not be considered constants from userland.  */
-#define SIGRTMIN	32
-#define SIGRTMAX	_NSIG
-
-/*
- * SA_FLAGS values:
- *
- * SA_ONSTACK is not currently supported, but will allow sigaltstack(2).
- * SA_INTERRUPT is a no-op, but left due to historical reasons. Use the
- * SA_RESTART flag to get restarting signals (which were the default long ago)
- * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
- * SA_RESETHAND clears the handler when the signal is delivered.
- * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
- * SA_NODEFER prevents the current signal from being masked in the handler.
- *
- * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
- * Unix names RESETHAND and NODEFER respectively.
- */
-#define SA_NOCLDSTOP	0x00000001u
-#define SA_NOCLDWAIT	0x00000002u
-#define SA_SIGINFO	0x00000004u
-#define SA_ONSTACK	0x08000000u
-#define SA_RESTART	0x10000000u
-#define SA_NODEFER	0x40000000u
-#define SA_RESETHAND	0x80000000u
-
-#define SA_NOMASK	SA_NODEFER
-#define SA_ONESHOT	SA_RESETHAND
-#define SA_INTERRUPT	0x20000000u /* dummy -- ignored */
-
-#define SA_RESTORER	0x04000000u
-
-/* 
- * sigaltstack controls
- */
-#define SS_ONSTACK	1
-#define SS_DISABLE	2
-
-#define MINSIGSTKSZ	2048
-#define SIGSTKSZ	8192
-
-#include <asm-generic/signal.h>
-
-struct old_sigaction {
-	__sighandler_t sa_handler;
-	old_sigset_t sa_mask;
-	unsigned long sa_flags;
-	__sigrestore_t sa_restorer;
-};
-
-struct sigaction {
-	__sighandler_t sa_handler;
-	unsigned long sa_flags;
-	__sigrestore_t sa_restorer;
-	sigset_t sa_mask;		/* mask last for extensibility */
-};
-
-struct k_sigaction {
-	struct sigaction sa;
-};
-
-typedef struct sigaltstack {
-	void __user *ss_sp;
-	int ss_flags;
-	size_t ss_size;
-} stack_t;
-
-struct pt_regs;
-struct timespec;
-extern int do_signal(sigset_t *oldset, struct pt_regs *regs);
-extern int do_signal32(sigset_t *oldset, struct pt_regs *regs);
-#define ptrace_signal_deliver(regs, cookie) do { } while (0)
-
-#endif /* _ASMPPC64_SIGNAL_H */