ftrace: ignore functions that cannot be kprobe-ed
kprobes already has an extensive list of annotations for functions
that should not be instrumented. Add notrace annotations to these
functions as well.
This is particularly useful for functions called by the NMI path.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/linux/kprobes.h b/include/linux/kprobes.h
index 0be7795..497b1d1 100644
--- a/include/linux/kprobes.h
+++ b/include/linux/kprobes.h
@@ -29,6 +29,7 @@
* <jkenisto@us.ibm.com> and Prasanna S Panchamukhi
* <prasanna@in.ibm.com> added function-return probes.
*/
+#include <linux/linkage.h>
#include <linux/list.h>
#include <linux/notifier.h>
#include <linux/smp.h>
@@ -47,7 +48,7 @@
#define KPROBE_HIT_SSDONE 0x00000008
/* Attach to insert probes on any functions which should be ignored*/
-#define __kprobes __attribute__((__section__(".kprobes.text")))
+#define __kprobes __attribute__((__section__(".kprobes.text"))) notrace
struct kprobe;
struct pt_regs;
@@ -256,7 +257,7 @@
#else /* CONFIG_KPROBES */
-#define __kprobes /**/
+#define __kprobes notrace
struct jprobe;
struct kretprobe;
diff --git a/kernel/notifier.c b/kernel/notifier.c
index 823be115..4282c0a 100644
--- a/kernel/notifier.c
+++ b/kernel/notifier.c
@@ -550,7 +550,7 @@
static ATOMIC_NOTIFIER_HEAD(die_chain);
-int notify_die(enum die_val val, const char *str,
+int notrace notify_die(enum die_val val, const char *str,
struct pt_regs *regs, long err, int trap, int sig)
{
struct die_args args = {