Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[sfrench/cifs-2.6.git] / kernel / signal.c

diff --git a/kernel/signal.c b/kernel/signal.c
index fe08008133dad06e0acd6efdc98db25c64367565..6b982f2cf524d82e6b72f276f7d9010df9007e47 100644 (file)
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -28,7 +28,8 @@
 #include <linux/freezer.h>
 #include <linux/pid_namespace.h>
 #include <linux/nsproxy.h>
-#include <trace/events/sched.h>
+#define CREATE_TRACE_POINTS
+#include <trace/events/signal.h>
 
 #include <asm/param.h>
 #include <asm/uaccess.h>
@@ -856,7 +857,7 @@ static int __send_signal(int sig, struct siginfo *info, struct task_struct *t,
        struct sigqueue *q;
        int override_rlimit;
 
-       trace_sched_signal_send(sig, t);
+       trace_signal_generate(sig, info, t);
 
        assert_spin_locked(&t->sighand->siglock);
 
@@ -918,12 +919,21 @@ static int __send_signal(int sig, struct siginfo *info, struct task_struct *t,
                        break;
                }
        } else if (!is_si_special(info)) {
-               if (sig >= SIGRTMIN && info->si_code != SI_USER)
-               /*
-                * Queue overflow, abort.  We may abort if the signal was rt
-                * and sent by user using something other than kill().
-                */
+               if (sig >= SIGRTMIN && info->si_code != SI_USER) {
+                       /*
+                        * Queue overflow, abort.  We may abort if the
+                        * signal was rt and sent by user using something
+                        * other than kill().
+                        */
+                       trace_signal_overflow_fail(sig, group, info);
                        return -EAGAIN;
+               } else {
+                       /*
+                        * This is a silent loss of information.  We still
+                        * send the signal, but the *info bits are lost.
+                        */
+                       trace_signal_lose_info(sig, group, info);
+               }
        }
 
 out_set:
@@ -1859,6 +1869,9 @@ relock:
                        ka = &sighand->action[signr-1];
                }
 
+               /* Trace actually delivered signals. */
+               trace_signal_deliver(signr, info, ka);
+
                if (ka->sa.sa_handler == SIG_IGN) /* Do nothing.  */
                        continue;
                if (ka->sa.sa_handler != SIG_DFL) {