diff options
| author | Christian Brauner <christian@brauner.io> | 2018-08-21 22:00:02 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-08-22 10:52:50 -0700 |
| commit | b1d294c80393e7ba18b3c646fe9d8e6a206c7988 (patch) | |
| tree | 5a7c10536e092f2d259ccefe9ae2495beb659185 | |
| parent | 6527de953354e550bf6d941fdcd1aaf832317e8d (diff) | |
| download | linux-b1d294c80393e7ba18b3c646fe9d8e6a206c7988.tar.bz2 | |
signal: make do_sigpending() void
do_sigpending() returned 0 unconditionally so it doesn't make sense to
have it return at all. This allows us to simplify a bunch of syscall
callers.
Link: http://lkml.kernel.org/r/20180602103653.18181-5-christian@brauner.io
Signed-off-by: Christian Brauner <christian@brauner.io>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: James Morris <james.morris@microsoft.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | kernel/signal.c | 41 |
1 files changed, 20 insertions, 21 deletions
diff --git a/kernel/signal.c b/kernel/signal.c index f03886cd064e..10918c7b2ee3 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -2753,7 +2753,7 @@ COMPAT_SYSCALL_DEFINE4(rt_sigprocmask, int, how, compat_sigset_t __user *, nset, } #endif -static int do_sigpending(sigset_t *set) +static void do_sigpending(sigset_t *set) { spin_lock_irq(¤t->sighand->siglock); sigorsets(set, ¤t->pending.signal, @@ -2762,7 +2762,6 @@ static int do_sigpending(sigset_t *set) /* Outside the lock because only this thread touches it. */ sigandsets(set, ¤t->blocked, set); - return 0; } /** @@ -2774,15 +2773,16 @@ static int do_sigpending(sigset_t *set) SYSCALL_DEFINE2(rt_sigpending, sigset_t __user *, uset, size_t, sigsetsize) { sigset_t set; - int err; if (sigsetsize > sizeof(*uset)) return -EINVAL; - err = do_sigpending(&set); - if (!err && copy_to_user(uset, &set, sigsetsize)) - err = -EFAULT; - return err; + do_sigpending(&set); + + if (copy_to_user(uset, &set, sigsetsize)) + return -EFAULT; + + return 0; } #ifdef CONFIG_COMPAT @@ -2790,15 +2790,13 @@ COMPAT_SYSCALL_DEFINE2(rt_sigpending, compat_sigset_t __user *, uset, compat_size_t, sigsetsize) { sigset_t set; - int err; if (sigsetsize > sizeof(*uset)) return -EINVAL; - err = do_sigpending(&set); - if (!err) - err = put_compat_sigset(uset, &set, sigsetsize); - return err; + do_sigpending(&set); + + return put_compat_sigset(uset, &set, sigsetsize); } #endif @@ -3560,25 +3558,26 @@ int __compat_save_altstack(compat_stack_t __user *uss, unsigned long sp) SYSCALL_DEFINE1(sigpending, old_sigset_t __user *, uset) { sigset_t set; - int err; if (sizeof(old_sigset_t) > sizeof(*uset)) return -EINVAL; - err = do_sigpending(&set); - if (!err && copy_to_user(uset, &set, sizeof(old_sigset_t))) - err = -EFAULT; - return err; + do_sigpending(&set); + + if (copy_to_user(uset, &set, sizeof(old_sigset_t))) + return -EFAULT; + + return 0; } #ifdef CONFIG_COMPAT COMPAT_SYSCALL_DEFINE1(sigpending, compat_old_sigset_t __user *, set32) { sigset_t set; - int err = do_sigpending(&set); - if (!err) - err = put_user(set.sig[0], set32); - return err; + + do_sigpending(&set); + + return put_user(set.sig[0], set32); } #endif |