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author | Oleg Nesterov <oleg@redhat.com> | 2011-04-28 11:36:20 +0200 |
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committer | Oleg Nesterov <oleg@redhat.com> | 2011-04-28 13:01:40 +0200 |
commit | b013c399245a88a73aaa031279f0c4d7cea7fe68 (patch) | |
tree | a008708eee3d659e4f416fdf56894d572ae798b8 /kernel/signal.c | |
parent | 702a5073fdb71eb29cd4912575289fb5044c1894 (diff) | |
download | kernel_goldelico_gta04-b013c399245a88a73aaa031279f0c4d7cea7fe68.zip kernel_goldelico_gta04-b013c399245a88a73aaa031279f0c4d7cea7fe68.tar.gz kernel_goldelico_gta04-b013c399245a88a73aaa031279f0c4d7cea7fe68.tar.bz2 |
signal: cleanup sys_sigprocmask()
Cleanup. Remove the unneeded goto's, we can simply read blocked.sig[0]
unconditionally and then copy-to-user it if oset != NULL.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Matt Fleming <matt.fleming@linux.intel.com>
Diffstat (limited to 'kernel/signal.c')
-rw-r--r-- | kernel/signal.c | 37 |
1 files changed, 16 insertions, 21 deletions
diff --git a/kernel/signal.c b/kernel/signal.c index e7ee4e6..c0af959 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -2889,29 +2889,28 @@ SYSCALL_DEFINE1(sigpending, old_sigset_t __user *, set) /** * sys_sigprocmask - examine and change blocked signals * @how: whether to add, remove, or set signals - * @set: signals to add or remove (if non-null) + * @nset: signals to add or remove (if non-null) * @oset: previous value of signal mask if non-null * * Some platforms have their own version with special arguments; * others support only sys_rt_sigprocmask. */ -SYSCALL_DEFINE3(sigprocmask, int, how, old_sigset_t __user *, set, +SYSCALL_DEFINE3(sigprocmask, int, how, old_sigset_t __user *, nset, old_sigset_t __user *, oset) { - int error; old_sigset_t old_set, new_set; + int error; - if (set) { - error = -EFAULT; - if (copy_from_user(&new_set, set, sizeof(*set))) - goto out; - new_set &= ~(sigmask(SIGKILL) | sigmask(SIGSTOP)); + old_set = current->blocked.sig[0]; - spin_lock_irq(¤t->sighand->siglock); - old_set = current->blocked.sig[0]; + if (nset) { + if (copy_from_user(&new_set, nset, sizeof(*nset))) + return -EFAULT; + new_set &= ~(sigmask(SIGKILL) | sigmask(SIGSTOP)); error = 0; + spin_lock_irq(¤t->sighand->siglock); switch (how) { default: error = -EINVAL; @@ -2930,19 +2929,15 @@ SYSCALL_DEFINE3(sigprocmask, int, how, old_sigset_t __user *, set, recalc_sigpending(); spin_unlock_irq(¤t->sighand->siglock); if (error) - goto out; - if (oset) - goto set_old; - } else if (oset) { - old_set = current->blocked.sig[0]; - set_old: - error = -EFAULT; + return error; + } + + if (oset) { if (copy_to_user(oset, &old_set, sizeof(*oset))) - goto out; + return -EFAULT; } - error = 0; -out: - return error; + + return 0; } #endif /* __ARCH_WANT_SYS_SIGPROCMASK */ |