new helper: sigsuspend()

guts of saved_sigmask-based sigsuspend/rt_sigsuspend.  Takes
kernel sigset_t *.

Open-coded instances replaced with calling it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 1 insertions, 9 deletions

diff --git a/kernel/compat.c b/kernel/compat.c
index d2c67aa49ae6..c28a306ae05c 100644
--- a/kernel/compat.c
+++ b/kernel/compat.c
@@ -1073,15 +1073,7 @@ asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, compat
         if (copy_from_user(&newset32, unewset, sizeof(compat_sigset_t)))
                 return -EFAULT;
         sigset_from_compat(&newset, &newset32);
-        sigdelsetmask(&newset, sigmask(SIGKILL)|sigmask(SIGSTOP));
-
-        current->saved_sigmask = current->blocked;
-        set_current_blocked(&newset);
-
-        current->state = TASK_INTERRUPTIBLE;
-        schedule();
-        set_restore_sigmask();
-        return -ERESTARTNOHAND;
+        return sigsuspend(&newset);
 }
 #endif /* __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND */