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authorPeter Zijlstra <peterz@infradead.org>2020-08-18 15:57:37 +0200
committerIngo Molnar <mingo@kernel.org>2020-09-01 09:58:03 +0200
commit0340a6b7fb767f7f296b9bacc9a215920519a644 (patch)
treeaa04f191d261cc7274fd07c14f46cb06bbf5d969 /drivers/oprofile
parent70d932985757fbe978024db313001218e9f8fe5c (diff)
downloadlinux-0340a6b7fb767f7f296b9bacc9a215920519a644.tar.bz2
module: Fix up module_notifier return values
While auditing all module notifiers I noticed a whole bunch of fail wrt the return value. Notifiers have a 'special' return semantics. As is; NOTIFY_DONE vs NOTIFY_OK is a bit vague; but notifier_from_errno(0) results in NOTIFY_OK and NOTIFY_DONE has a comment that says "Don't care". From this I've used NOTIFY_DONE when the function completely ignores the callback and notifier_to_error() isn't used. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org> Reviewed-by: Robert Richter <rric@kernel.org> Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Link: https://lore.kernel.org/r/20200818135804.385360407@infradead.org
Diffstat (limited to 'drivers/oprofile')
-rw-r--r--drivers/oprofile/buffer_sync.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/oprofile/buffer_sync.c b/drivers/oprofile/buffer_sync.c
index 4d7695289eda..cc917865f13a 100644
--- a/drivers/oprofile/buffer_sync.c
+++ b/drivers/oprofile/buffer_sync.c
@@ -116,7 +116,7 @@ module_load_notify(struct notifier_block *self, unsigned long val, void *data)
{
#ifdef CONFIG_MODULES
if (val != MODULE_STATE_COMING)
- return 0;
+ return NOTIFY_DONE;
/* FIXME: should we process all CPU buffers ? */
mutex_lock(&buffer_mutex);
@@ -124,7 +124,7 @@ module_load_notify(struct notifier_block *self, unsigned long val, void *data)
add_event_entry(MODULE_LOADED_CODE);
mutex_unlock(&buffer_mutex);
#endif
- return 0;
+ return NOTIFY_OK;
}