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authorIngo Molnar <mingo@elte.hu>2008-07-29 12:00:59 +0200
committerIngo Molnar <mingo@elte.hu>2008-10-14 10:34:22 +0200
commit36dcd67ae994fece615b7c700958d215e884b9ae (patch)
tree2a4bed0cb9de673b7760b81f9fe03fd5f262c77e
parent9795302acf2817d0842e56d23df6008e43df0970 (diff)
downloadop-kernel-dev-36dcd67ae994fece615b7c700958d215e884b9ae.zip
op-kernel-dev-36dcd67ae994fece615b7c700958d215e884b9ae.tar.gz
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>
-rw-r--r--include/linux/kprobes.h5
-rw-r--r--kernel/notifier.c2
2 files changed, 4 insertions, 3 deletions
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 @@ void recycle_rp_inst(struct kretprobe_instance *ri, struct hlist_head *head);
#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 @@ EXPORT_SYMBOL(unregister_reboot_notifier);
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 = {
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