[POWERPC] Consolidate sys_sigaltstack

sys_sigaltstack is the same on 32bit and 64 and we can consolidate it
to signal.c.  The only difference is that the 32bit code uses ints
for the unused register paramaters and 64bit unsigned long.  I've
changed it to unsigned long because it's the same width on 32bit.

(I also wonder who came up with this awkward calling convention.. :))

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

3 files changed, 7 insertions, 16 deletions

diff --git a/arch/powerpc/kernel/signal.c b/arch/powerpc/kernel/signal.c
index 88a12544e8b1..325d260abd4e 100644
--- a/arch/powerpc/kernel/signal.c
+++ b/arch/powerpc/kernel/signal.c
@@ -63,3 +63,10 @@ void check_syscall_restart(struct pt_regs *regs, struct k_sigaction *ka,
                 regs->ccr |= 0x10000000;
         }
 }
+
+long sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
+                unsigned long r5, unsigned long r6, unsigned long r7,
+                unsigned long r8, struct pt_regs *regs)
+{
+        return do_sigaltstack(uss, uoss, regs->gpr[1]);
+}
diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c
index e5cc803476a1..f5713bfcc56e 100644
--- a/arch/powerpc/kernel/signal_32.c
+++ b/arch/powerpc/kernel/signal_32.c
@@ -253,14 +253,6 @@ long sys_sigsuspend(old_sigset_t mask)
         return -ERESTARTNOHAND;
 }
 
-#ifdef CONFIG_PPC32
-long sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss, int r5,
-                int r6, int r7, int r8, struct pt_regs *regs)
-{
-        return do_sigaltstack(uss, uoss, regs->gpr[1]);
-}
-#endif
-
 long sys_sigaction(int sig, struct old_sigaction __user *act,
                 struct old_sigaction __user *oact)
 {
diff --git a/arch/powerpc/kernel/signal_64.c b/arch/powerpc/kernel/signal_64.c
index 5d2faf0fbf05..817f1cf4a405 100644
--- a/arch/powerpc/kernel/signal_64.c
+++ b/arch/powerpc/kernel/signal_64.c
@@ -66,14 +66,6 @@ struct rt_sigframe {
         char abigap[288];
 } __attribute__ ((aligned (16)));
 
-long sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss, unsigned long r5,
-                     unsigned long r6, unsigned long r7, unsigned long r8,
-                     struct pt_regs *regs)
-{
-        return do_sigaltstack(uss, uoss, regs->gpr[1]);
-}
-
-
 /*
  * Set up the sigcontext for the signal frame.
  */