[MIPS] IRIX: Fix off-by-one error in signal compat code.

Based on original patch by Roel Kluin <12o3l@tiscali.nl>.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 6 insertions, 2 deletions

diff --git a/arch/mips/kernel/irixsig.c b/arch/mips/kernel/irixsig.c
index a0a91056fda7..33506ff25910 100644
--- a/arch/mips/kernel/irixsig.c
+++ b/arch/mips/kernel/irixsig.c
@@ -24,8 +24,12 @@
 
 #define _BLOCKABLE (~(_S(SIGKILL) | _S(SIGSTOP)))
 
+#define _IRIX_NSIG              128
+#define _IRIX_NSIG_BPW          BITS_PER_LONG
+#define _IRIX_NSIG_WORDS        (_IRIX_NSIG / _IRIX_NSIG_BPW)
+
 typedef struct {
-        unsigned long sig[4];
+        unsigned long sig[_IRIX_NSIG_WORDS];
 } irix_sigset_t;
 
 struct sigctx_irix5 {
@@ -527,7 +531,7 @@ asmlinkage int irix_sigpoll_sys(unsigned long __user *set,
 
                 expire = schedule_timeout_interruptible(expire);
 
-                for (i=0; i<=4; i++)
+                for (i=0; i < _IRIX_NSIG_WORDS; i++)
                         tmp |= (current->pending.signal.sig[i] & kset.sig[i]);
 
                 if (tmp)