f2fs: disallow switching io_bits option during remount

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If IO alignment feature is turned on after remount, we didn't
initialize mempool of it, it turns out we will encounter panic
during IO submission due to access NULL mempool pointer.

This feature should be set only at mount time, so simply deny
configuring during remount.

This fixes bug reported in bugzilla:

https://bugzilla.kernel.org/show_bug.cgi?id=204135

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

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Chao Yu 2019-07-12 16:57:00 +08:00 • committed by Jaegeuk Kim

parent c72db71ed6

commit 1f78adfab3

1 changed files with 7 additions and 0 deletions

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fs/f2fs/super.c

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