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-rw-r--r--kernel/signal.c24
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)
{