From b772434be0891ed1081a08ae7cfd4666728f8e82 Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Tue, 16 Jul 2019 16:29:53 -0700 Subject: signal: simplify set_user_sigmask/restore_user_sigmask task->saved_sigmask and ->restore_sigmask are only used in the ret-from- syscall paths. This means that set_user_sigmask() can save ->blocked in ->saved_sigmask and do set_restore_sigmask() to indicate that ->blocked was modified. This way the callers do not need 2 sigset_t's passed to set/restore and restore_user_sigmask() renamed to restore_saved_sigmask_unless() turns into the trivial helper which just calls restore_saved_sigmask(). Link: http://lkml.kernel.org/r/20190606113206.GA9464@redhat.com Signed-off-by: Oleg Nesterov Cc: Deepa Dinamani Cc: Arnd Bergmann Cc: Jens Axboe Cc: Davidlohr Bueso Cc: Eric Wong Cc: Jason Baron Cc: Thomas Gleixner Cc: Al Viro Cc: Eric W. Biederman Cc: David Laight Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/eventpoll.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) (limited to 'fs/eventpoll.c') diff --git a/fs/eventpoll.c b/fs/eventpoll.c index 4c74c768ae43..0f9c073d78d5 100644 --- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -2313,19 +2313,17 @@ SYSCALL_DEFINE6(epoll_pwait, int, epfd, struct epoll_event __user *, events, size_t, sigsetsize) { int error; - sigset_t ksigmask, sigsaved; /* * If the caller wants a certain signal mask to be set during the wait, * we apply it here. */ - error = set_user_sigmask(sigmask, &ksigmask, &sigsaved, sigsetsize); + error = set_user_sigmask(sigmask, sigsetsize); if (error) return error; error = do_epoll_wait(epfd, events, maxevents, timeout); - - restore_user_sigmask(sigmask, &sigsaved, error == -EINTR); + restore_saved_sigmask_unless(error == -EINTR); return error; } @@ -2338,19 +2336,17 @@ COMPAT_SYSCALL_DEFINE6(epoll_pwait, int, epfd, compat_size_t, sigsetsize) { long err; - sigset_t ksigmask, sigsaved; /* * If the caller wants a certain signal mask to be set during the wait, * we apply it here. */ - err = set_compat_user_sigmask(sigmask, &ksigmask, &sigsaved, sigsetsize); + err = set_compat_user_sigmask(sigmask, sigsetsize); if (err) return err; err = do_epoll_wait(epfd, events, maxevents, timeout); - - restore_user_sigmask(sigmask, &sigsaved, err == -EINTR); + restore_saved_sigmask_unless(err == -EINTR); return err; } -- cgit v1.2.3-55-g7522