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signals: eventpoll: do not use sigprocmask() 

sigprocmask() should die. None of the current callers actually
need this strange interface.

Change fs/eventpoll.c to use set_current_blocked(). This also
means we should not worry about SIGKILL/SIGSTOP.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Eric Wong <normalperson@yhbt.net>
Cc: Jason Baron <jbaron@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Oleg Nesterov 2013-07-03 15:08:14 -07:00 committed by Linus Torvalds
parent 29000caecb
commit 77d5591802
1 changed files with 6 additions and 6 deletions
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12
fs/eventpoll.c
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@ -1975,8 +1975,8 @@ SYSCALL_DEFINE6(epoll_pwait, int, epfd, struct epoll_event __user *, events,
return -EINVAL;
if (copy_from_user(&ksigmask, sigmask, sizeof(ksigmask)))
return -EFAULT;
sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP));
sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
sigsaved = current->blocked;
set_current_blocked(&ksigmask);
}
error = sys_epoll_wait(epfd, events, maxevents, timeout);
@ -1993,7 +1993,7 @@ SYSCALL_DEFINE6(epoll_pwait, int, epfd, struct epoll_event __user *, events,
sizeof(sigsaved));
set_restore_sigmask();
} else
sigprocmask(SIG_SETMASK, &sigsaved, NULL);
set_current_blocked(&sigsaved);
}
return error;
@ -2020,8 +2020,8 @@ COMPAT_SYSCALL_DEFINE6(epoll_pwait, int, epfd,
if (copy_from_user(&csigmask, sigmask, sizeof(csigmask)))
return -EFAULT;
sigset_from_compat(&ksigmask, &csigmask);
sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP));
sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
sigsaved = current->blocked;
set_current_blocked(&ksigmask);
}
err = sys_epoll_wait(epfd, events, maxevents, timeout);
@ -2038,7 +2038,7 @@ COMPAT_SYSCALL_DEFINE6(epoll_pwait, int, epfd,
sizeof(sigsaved));
set_restore_sigmask();
} else
sigprocmask(SIG_SETMASK, &sigsaved, NULL);
set_current_blocked(&sigsaved);
}
return err;