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SubjectRe: [PATCH] To add NULL pointer check

Hello Jaegeuk,
+-- On Wed, 3 Apr 2013, Jaegeuk Kim wrote --+
| Therefore, I think f2fs_write_data_pages() is better to handle this. Please
| review the modified patch. Thanks,
|
| diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
| index 47a2d7c..cf9ff5f 100644
| --- a/fs/f2fs/data.c
| +++ b/fs/f2fs/data.c
| @@ -559,6 +559,10 @@ static int f2fs_write_data_pages(struct
| address_space *mapping,
| int ret;
| long excess_nrtw = 0, desired_nrtw;
|
| + /* deal with chardevs and other special file */
| + if (!mapping->a_ops->writepage)
| + return 0;
| +
| if (wbc->nr_to_write < MAX_DESIRED_PAGES_WP) {
| desired_nrtw = MAX_DESIRED_PAGES_WP;
| excess_nrtw = desired_nrtw - wbc->nr_to_write;
|

Yeah, I considered this, it saves us a call to `write_cache_pages'; But then
thought it'll help if `__f2fs_writepage' is called from other place later.

I agree, above patch serves too.

Thank you.
--
Prasad J Pandit / Red Hat Security Response Team
DB7A 84C5 D3F9 7CD1 B5EB C939 D048 7860 3655 602B


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