diff options
| author | Arjan van de Ven <arjan@linux.intel.com> | 2008-08-15 15:29:38 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-09-10 09:08:53 +0200 |
| commit | ab7476cf76e560f0efda2a631a70aabe93009025 (patch) | |
| tree | d4e843760774d7099692950a6ac49ccdbc8b0d55 /kernel/notifier.c | |
| parent | fb822db465bd9fd4208eef1af4490539b236c54e (diff) | |
| download | lwn-ab7476cf76e560f0efda2a631a70aabe93009025.tar.gz lwn-ab7476cf76e560f0efda2a631a70aabe93009025.zip | |
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.c | 10 |
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; |