The patch titled
notifier: change notifier_from_errno(0) to return NOTIFY_OK
has been added to the -mm tree. Its filename is
notifier-change-notifier_from_errno0-to-return-notify_ok.patch
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------------------------------------------------------
Subject: notifier: change notifier_from_errno(0) to return NOTIFY_OK
From: Akinobu Mita <akinobu.mita@xxxxxxxxx>
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@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/notifier.h | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff -puN include/linux/notifier.h~notifier-change-notifier_from_errno0-to-return-notify_ok include/linux/notifier.h
--- a/include/linux/notifier.h~notifier-change-notifier_from_errno0-to-return-notify_ok
+++ a/include/linux/notifier.h
@@ -164,7 +164,10 @@ extern int __srcu_notifier_call_chain(st
/* 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. */
_
Patches currently in -mm which might be from akinobu.mita@xxxxxxxxx are
intel-iommu-use-for_each_set_bit.patch
bitops-rename-for_each_bit-to-for_each_set_bit-mtd.patch
cpu-hotplug-introduce-cpu_notify-__cpu_notify-cpu_notify_nofail.patch
cpu-hotplug-return-better-errno-on-cpu-hotplug-failure.patch
notifier-change-notifier_from_errno0-to-return-notify_ok.patch
x86-convert-cpu-notifier-to-return-encapsulate-errno-value.patch
topology-convert-cpu-notifier-to-return-encapsulate-errno-value.patch
kernel-convert-cpu-notifier-to-return-encapsulate-errno-value.patch
slab-convert-cpu-notifier-to-return-encapsulate-errno-value.patch
iucv-convert-cpu-notifier-to-return-encapsulate-errno-value.patch
ehca-convert-cpu-notifier-to-return-encapsulate-errno-value.patch
s390-convert-cpu-notifier-to-return-encapsulate-errno-value.patch
md-convert-cpu-notifier-to-return-encapsulate-errno-value.patch
fault-injection-add-cpu-notifier-error-injection-module.patch
bitops-remove-temporary-for_each_bit.patch
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