summaryrefslogtreecommitdiff
path: root/kernel/notifier.c
diff options
context:
space:
mode:
authorArjan van de Ven <arjan@linux.intel.com>2008-08-15 15:29:38 -0700
committerIngo Molnar <mingo@elte.hu>2008-09-10 09:08:53 +0200
commitab7476cf76e560f0efda2a631a70aabe93009025 (patch)
treed4e843760774d7099692950a6ac49ccdbc8b0d55 /kernel/notifier.c
parentfb822db465bd9fd4208eef1af4490539b236c54e (diff)
downloadlinux-sh-ab7476cf76e560f0efda2a631a70aabe93009025.tar.gz
debug: add notifier chain debugging, v2
- unbreak ia64 (and powerpc) where function pointers dont point at code but at data (reported by Tony Luck) [ mingo@elte.hu: various cleanups ] Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/notifier.c')
-rw-r--r--kernel/notifier.c10
1 files changed, 1 insertions, 9 deletions
diff --git a/kernel/notifier.c b/kernel/notifier.c
index 143fdd77dbf7..0f39e398ef60 100644
--- a/kernel/notifier.c
+++ b/kernel/notifier.c
@@ -21,10 +21,6 @@ BLOCKING_NOTIFIER_HEAD(reboot_notifier_list);
static int notifier_chain_register(struct notifier_block **nl,
struct notifier_block *n)
{
- if (!kernel_text_address((unsigned long)n->notifier_call)) {
- WARN(1, "Invalid notifier registered!");
- return 0;
- }
while ((*nl) != NULL) {
if (n->priority > (*nl)->priority)
break;
@@ -38,10 +34,6 @@ static int notifier_chain_register(struct notifier_block **nl,
static int notifier_chain_cond_register(struct notifier_block **nl,
struct notifier_block *n)
{
- if (!kernel_text_address((unsigned long)n->notifier_call)) {
- WARN(1, "Invalid notifier registered!");
- return 0;
- }
while ((*nl) != NULL) {
if ((*nl) == n)
return 0;
@@ -92,7 +84,7 @@ static int __kprobes notifier_call_chain(struct notifier_block **nl,
next_nb = rcu_dereference(nb->next);
#ifdef CONFIG_DEBUG_NOTIFIERS
- if (!kernel_text_address((unsigned long)nb->notifier_call)) {
+ if (unlikely(!func_ptr_is_kernel_text(nb->notifier_call))) {
WARN(1, "Invalid notifier called!");
nb = next_nb;
continue;