[POWERPC] Merge creation of signal frame

The code for creating signal frames was still duplicated and split
in strange ways between 32 and 64 bits, including the SA_ONSTACK
handling being in do_signal on 32 bits but inside handle_rt_signal
on 64 bits etc...

This moves the 64 bits get_sigframe() to the generic signal.c,
cleans it a bit, moves the access_ok() call done by all callers to
it as well, and adapts/cleanups the 3 different signal handling cases
to use that common function.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/arch/powerpc/kernel/signal.h b/arch/powerpc/kernel/signal.h
index 190d4325f974..c284f75afe77 100644
--- a/arch/powerpc/kernel/signal.h
+++ b/arch/powerpc/kernel/signal.h
@@ -12,15 +12,17 @@
 
 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
 
+extern void __user * get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
+                                  size_t frame_size);
 extern void restore_sigmask(sigset_t *set);
 
 extern int handle_signal32(unsigned long sig, struct k_sigaction *ka,
                            siginfo_t *info, sigset_t *oldset,
-                           struct pt_regs *regs, unsigned long newsp);
+                           struct pt_regs *regs);
 
 extern int handle_rt_signal32(unsigned long sig, struct k_sigaction *ka,
                               siginfo_t *info, sigset_t *oldset,
-                              struct pt_regs *regs, unsigned long newsp);
+                              struct pt_regs *regs);
 
 extern int handle_rt_signal64(int signr, struct k_sigaction *ka,
                               siginfo_t *info, sigset_t *set,