1 files changed, 23 insertions, 1 deletions

diff --git a/kernel/signal.c b/kernel/signal.c
index 00cd1ce998be..4a0934e03d5c 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -3352,7 +3352,29 @@ SYSCALL_DEFINE2(rt_sigsuspend, sigset_t __user *, unewset, size_t, sigsetsize)
                 return -EFAULT;
         return sigsuspend(&newset);
 }
-#endif /* __ARCH_WANT_SYS_RT_SIGSUSPEND */
+ 
+#ifdef CONFIG_COMPAT
+COMPAT_SYSCALL_DEFINE2(rt_sigsuspend, compat_sigset_t __user *, unewset, compat_size_t, sigsetsize)
+{
+#ifdef __BIG_ENDIAN
+        sigset_t newset;
+        compat_sigset_t newset32;
+
+        /* XXX: Don't preclude handling different sized sigset_t's.  */
+        if (sigsetsize != sizeof(sigset_t))
+                return -EINVAL;
+
+        if (copy_from_user(&newset32, unewset, sizeof(compat_sigset_t)))
+                return -EFAULT;
+        sigset_from_compat(&newset, &newset32);
+        return sigsuspend(&newset);
+#else
+        /* on little-endian bitmaps don't care about granularity */
+        return sys_rt_sigsuspend((sigset_t __user *)unewset, sigsetsize);
+#endif
+}
+#endif
+#endif
 
 __attribute__((weak)) const char *arch_vma_name(struct vm_area_struct *vma)
 {