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authorAl Viro <viro@zeniv.linux.org.uk>2012-04-27 13:58:59 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2012-06-01 12:58:51 -0400
commit77097ae503b170120ab66dd1d547f8577193f91f (patch)
treebee5b2e8d91b9ec8ab74c58cbec1796c7bacc2e5 /kernel/signal.c
parentedd63a2763bdae0daa4f0a4d4c5d61d1154352a5 (diff)
downloadlwn-77097ae503b170120ab66dd1d547f8577193f91f.tar.gz
lwn-77097ae503b170120ab66dd1d547f8577193f91f.zip
most of set_current_blocked() callers want SIGKILL/SIGSTOP removed from set
Only 3 out of 63 do not. Renamed the current variant to __set_current_blocked(), added set_current_blocked() that will exclude unblockable signals, switched open-coded instances to it. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel/signal.c')
-rw-r--r--kernel/signal.c18
1 files changed, 12 insertions, 6 deletions
diff --git a/kernel/signal.c b/kernel/signal.c
index b9be7e0fe41a..df8d721a9e6f 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -2524,7 +2524,16 @@ static void __set_task_blocked(struct task_struct *tsk, const sigset_t *newset)
* It is wrong to change ->blocked directly, this helper should be used
* to ensure the process can't miss a shared signal we are going to block.
*/
-void set_current_blocked(const sigset_t *newset)
+void set_current_blocked(sigset_t *newset)
+{
+ struct task_struct *tsk = current;
+ sigdelsetmask(newset, sigmask(SIGKILL) | sigmask(SIGSTOP));
+ spin_lock_irq(&tsk->sighand->siglock);
+ __set_task_blocked(tsk, newset);
+ spin_unlock_irq(&tsk->sighand->siglock);
+}
+
+void __set_current_blocked(const sigset_t *newset)
{
struct task_struct *tsk = current;
@@ -2564,7 +2573,7 @@ int sigprocmask(int how, sigset_t *set, sigset_t *oldset)
return -EINVAL;
}
- set_current_blocked(&newset);
+ __set_current_blocked(&newset);
return 0;
}
@@ -3138,7 +3147,7 @@ SYSCALL_DEFINE3(sigprocmask, int, how, old_sigset_t __user *, nset,
return -EINVAL;
}
- set_current_blocked(&new_blocked);
+ __set_current_blocked(&new_blocked);
}
if (oset) {
@@ -3202,7 +3211,6 @@ SYSCALL_DEFINE1(ssetmask, int, newmask)
int old = current->blocked.sig[0];
sigset_t newset;
- siginitset(&newset, newmask & ~(sigmask(SIGKILL) | sigmask(SIGSTOP)));
set_current_blocked(&newset);
return old;
@@ -3243,8 +3251,6 @@ SYSCALL_DEFINE0(pause)
int sigsuspend(sigset_t *set)
{
- sigdelsetmask(set, sigmask(SIGKILL)|sigmask(SIGSTOP));
-
current->saved_sigmask = current->blocked;
set_current_blocked(set);