[ARM] Replace extramask with a full copy of the sigmask

There's not much point in splitting the sigmask between two different
locations, so copy it entirely into a proper sigset_t.  This will
eventually allow rt_sigframe and sigframe to share more code.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 3 insertions, 10 deletions

diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c
index 0ddbf2795c5b..7a4213ef0f46 100644
--- a/arch/arm/kernel/signal.c
+++ b/arch/arm/kernel/signal.c
@@ -194,7 +194,7 @@ struct aux_sigframe {
  */
 struct sigframe {
         struct sigcontext sc;
-        unsigned long extramask[_NSIG_WORDS-1];
+        sigset_t sigmask;
         unsigned long retcode[2];
         struct aux_sigframe aux __attribute__((aligned(8)));
 };
@@ -264,10 +264,7 @@ asmlinkage int sys_sigreturn(struct pt_regs *regs)
 
         if (!access_ok(VERIFY_READ, frame, sizeof (*frame)))
                 goto badframe;
-        if (__get_user(set.sig[0], &frame->sc.oldmask)
-            || (_NSIG_WORDS > 1
-                && __copy_from_user(&set.sig[1], &frame->extramask,
-                                    sizeof(frame->extramask))))
+        if (__copy_from_user(&set, &frame->sigmask, sizeof(set)))
                 goto badframe;
 
         sigdelsetmask(&set, ~_BLOCKABLE);
@@ -486,11 +483,7 @@ setup_frame(int usig, struct k_sigaction *ka, sigset_t *set, struct pt_regs *reg
                 return 1;
 
         err |= setup_sigcontext(&frame->sc, &frame->aux, regs, set->sig[0]);
-
-        if (_NSIG_WORDS > 1) {
-                err |= __copy_to_user(frame->extramask, &set->sig[1],
-                                      sizeof(frame->extramask));
-        }
+        err |= __copy_to_user(&frame->sigmask, set, sizeof(*set));
 
         if (err == 0)
                 err = setup_return(regs, ka, frame->retcode, frame, usig);