parisc: switch to generic compat rt_sigaction()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arch/parisc/Kconfig

@@ -24,6 +24,7 @@ config PARISC
 	select MODULES_USE_ELF_RELA
 	select CLONE_BACKWARDS
 	select GENERIC_SIGALTSTACK
+	select GENERIC_COMPAT_RT_SIGACTION
 	select GENERIC_COMPAT_RT_SIGQUEUEINFO
 	select GENERIC_COMPAT_RT_SIGPROCMASK
 	select GENERIC_COMPAT_RT_SIGPENDING

arch/parisc/kernel/signal32.c

@@ -60,34 +60,6 @@ sigset_64to32(compat_sigset_t *s32, sigset_t *s64)
 	s32->sig[1] = (s64->sig[0] >> 32) & 0xffffffffUL;
 }
 
-long
-sys32_rt_sigaction(int sig, const struct sigaction32 __user *act, struct sigaction32 __user *oact,
-                 size_t sigsetsize)
-{
-	struct k_sigaction32 new_sa32, old_sa32;
-	struct k_sigaction new_sa, old_sa;
-	int ret = -EINVAL;
-
-	if (act) {
-		if (copy_from_user(&new_sa32.sa, act, sizeof new_sa32.sa))
-			return -EFAULT;
-		new_sa.sa.sa_handler = (__sighandler_t)(unsigned long)new_sa32.sa.sa_handler;
-		new_sa.sa.sa_flags = new_sa32.sa.sa_flags;
-		sigset_32to64(&new_sa.sa.sa_mask, &new_sa32.sa.sa_mask);
-	}
-
-	ret = do_sigaction(sig, act ? &new_sa : NULL, oact ? &old_sa : NULL);
-
-	if (!ret && oact) {
-		sigset_64to32(&old_sa32.sa.sa_mask, &old_sa.sa.sa_mask);
-		old_sa32.sa.sa_flags = old_sa.sa.sa_flags;
-		old_sa32.sa.sa_handler = (__sighandler_t32)(unsigned long)old_sa.sa.sa_handler;
-		if (copy_to_user(oact, &old_sa32.sa, sizeof old_sa32.sa))
-			return -EFAULT;
-	}
-	return ret;
-}
-
 long
 restore_sigcontext32(struct compat_sigcontext __user *sc, struct compat_regfile __user * rf,
 		struct pt_regs *regs)

arch/parisc/kernel/signal32.h

@@ -21,17 +21,6 @@
 
 #include <linux/compat.h>
 
-typedef compat_uptr_t compat_sighandler_t;
-
-/* Most things should be clean enough to redefine this at will, if care
-   is taken to make libc match.  */
-
-struct compat_sigaction {
-        compat_sighandler_t sa_handler;
-        compat_uint_t sa_flags;
-        compat_sigset_t sa_mask;               /* mask last for extensibility */
-};
-
 /* 32-bit ucontext as seen from an 64-bit kernel */
 struct compat_ucontext {
         compat_uint_t uc_flags;
@@ -45,10 +34,6 @@ struct compat_ucontext {
 
 /* ELF32 signal handling */
 
-struct k_sigaction32 {
-	struct compat_sigaction sa;
-};
-
 int copy_siginfo_to_user32 (compat_siginfo_t __user *to, siginfo_t *from);
 int copy_siginfo_from_user32 (siginfo_t *to, compat_siginfo_t __user *from);
 

arch/parisc/kernel/sys32.h

@@ -33,16 +33,4 @@
     set_fs (old_fs); \
 }
 
-#ifdef CONFIG_COMPAT
-
-typedef __u32 __sighandler_t32;
-
-struct sigaction32 {
-	__sighandler_t32 sa_handler;
-	unsigned int sa_flags;
-	compat_sigset_t sa_mask;		/* mask last for extensibility */
-};
-
-#endif
-
 #endif

arch/parisc/kernel/syscall_table.S

@@ -265,7 +265,7 @@
 	ENTRY_SAME(prctl)
 	/* signals need a careful review */
 	ENTRY_SAME(rt_sigreturn_wrapper)
-	ENTRY_DIFF(rt_sigaction)
+	ENTRY_COMP(rt_sigaction)
 	ENTRY_COMP(rt_sigprocmask)	/* 175 */
 	ENTRY_COMP(rt_sigpending)
 	ENTRY_COMP(rt_sigtimedwait)