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authorAkinobu Mita <akinobu.mita@gmail.com>2010-05-26 14:43:29 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-05-27 09:12:47 -0700
commitb957e043ee557ca9b6bc451755ecd849b28852a4 (patch)
treecd5046c854264a71a2de6261a0d2996a098b5c88 /include/linux/notifier.h
parente6bde73b07edeb703d4c89c1daabc09c303de11f (diff)
notifier: change notifier_from_errno(0) to return NOTIFY_OK
This changes notifier_from_errno(0) to be NOTIFY_OK instead of NOTIFY_STOP_MASK | NOTIFY_OK. Currently, the notifiers which return encapsulated errno value have to do something like this: err = do_something(); // returns -errno if (err) return notifier_from_errno(err); else return NOTIFY_OK; This change makes the above code simple: err = do_something(); // returns -errno return return notifier_from_errno(err); Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/notifier.h')
-rw-r--r--include/linux/notifier.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/include/linux/notifier.h b/include/linux/notifier.h
index 7c3609622334..540703b555cb 100644
--- a/include/linux/notifier.h
+++ b/include/linux/notifier.h
@@ -164,7 +164,10 @@ extern int __srcu_notifier_call_chain(struct srcu_notifier_head *nh,
/* Encapsulate (negative) errno value (in particular, NOTIFY_BAD <=> EPERM). */
static inline int notifier_from_errno(int err)
{
- return NOTIFY_STOP_MASK | (NOTIFY_OK - err);
+ if (err)
+ return NOTIFY_STOP_MASK | (NOTIFY_OK - err);
+
+ return NOTIFY_OK;
}
/* Restore (negative) errno value from notify return value. */