signals: add set_restore_sigmask

This adds the set_restore_sigmask() inline in <linux/thread_info.h> and
replaces every set_thread_flag(TIF_RESTORE_SIGMASK) with a call to it.  No
change, but abstracts the details of the flag protocol from all the calls.

Signed-off-by: Roland McGrath <roland@redhat.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 6 insertions, 7 deletions

diff --git a/fs/compat.c b/fs/compat.c
index 2ce4456aad30..9964d542ae9e 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -1720,7 +1720,7 @@ sticky:
                 if (sigmask) {
                         memcpy(&current->saved_sigmask, &sigsaved,
                                         sizeof(sigsaved));
-                        set_thread_flag(TIF_RESTORE_SIGMASK);
+                        set_restore_sigmask();
                 }
         } else if (sigmask)
                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
@@ -1791,7 +1791,7 @@ asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
                 if (sigmask) {
                         memcpy(&current->saved_sigmask, &sigsaved,
                                 sizeof(sigsaved));
-                        set_thread_flag(TIF_RESTORE_SIGMASK);
+                        set_restore_sigmask();
                 }
                 ret = -ERESTARTNOHAND;
         } else if (sigmask)
@@ -2117,7 +2117,7 @@ asmlinkage long compat_sys_epoll_pwait(int epfd,
                 if (err == -EINTR) {
                         memcpy(&current->saved_sigmask, &sigsaved,
                                sizeof(sigsaved));
-                        set_thread_flag(TIF_RESTORE_SIGMASK);
+                        set_restore_sigmask();
                 } else
                         sigprocmask(SIG_SETMASK, &sigsaved, NULL);
         }
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 0d237182d721..71af2fc0041e 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -1279,7 +1279,7 @@ asmlinkage long sys_epoll_pwait(int epfd, struct epoll_event __user *events,
                 if (error == -EINTR) {
                         memcpy(&current->saved_sigmask, &sigsaved,
                                sizeof(sigsaved));
-                        set_thread_flag(TIF_RESTORE_SIGMASK);
+                        set_restore_sigmask();
                 } else
                         sigprocmask(SIG_SETMASK, &sigsaved, NULL);
         }
@@ -1309,4 +1309,3 @@ static int __init eventpoll_init(void)
         return 0;
 }
 fs_initcall(eventpoll_init);
-
diff --git a/fs/select.c b/fs/select.c
index 00f58c5c7e05..32ce2b32fad1 100644
--- a/fs/select.c
+++ b/fs/select.c
@@ -498,7 +498,7 @@ sticky:
                 if (sigmask) {
                         memcpy(&current->saved_sigmask, &sigsaved,
                                         sizeof(sigsaved));
-                        set_thread_flag(TIF_RESTORE_SIGMASK);
+                        set_restore_sigmask();
                 }
         } else if (sigmask)
                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
@@ -805,7 +805,7 @@ asmlinkage long sys_ppoll(struct pollfd __user *ufds, unsigned int nfds,
                 if (sigmask) {
                         memcpy(&current->saved_sigmask, &sigsaved,
                                         sizeof(sigsaved));
-                        set_thread_flag(TIF_RESTORE_SIGMASK);
+                        set_restore_sigmask();
                 }
                 ret = -ERESTARTNOHAND;
         } else if (sigmask)