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Diffstat (limited to 'include/linux/signal.h')
-rw-r--r--include/linux/signal.h15
1 files changed, 14 insertions, 1 deletions
diff --git a/include/linux/signal.h b/include/linux/signal.h
index b5d99482d3fe..1a5f88316b08 100644
--- a/include/linux/signal.h
+++ b/include/linux/signal.h
@@ -282,6 +282,9 @@ extern void signal_setup_done(int failed, struct ksignal *ksig, int stepping);
extern void exit_signals(struct task_struct *tsk);
extern void kernel_sigaction(int, __sighandler_t);
+#define SIG_KTHREAD ((__force __sighandler_t)2)
+#define SIG_KTHREAD_KERNEL ((__force __sighandler_t)3)
+
static inline void allow_signal(int sig)
{
/*
@@ -289,7 +292,17 @@ static inline void allow_signal(int sig)
* know it'll be handled, so that they don't get converted to
* SIGKILL or just silently dropped.
*/
- kernel_sigaction(sig, (__force __sighandler_t)2);
+ kernel_sigaction(sig, SIG_KTHREAD);
+}
+
+static inline void allow_kernel_signal(int sig)
+{
+ /*
+ * Kernel threads handle their own signals. Let the signal code
+ * know signals sent by the kernel will be handled, so that they
+ * don't get silently dropped.
+ */
+ kernel_sigaction(sig, SIG_KTHREAD_KERNEL);
}
static inline void disallow_signal(int sig)