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f2fs: allow direct read for zoned device
commit 689fe57 upstream. This reverts dbf8e63 ("f2fs: remove device type check for direct IO"), and apply the below first version, since it contributed out-of-order DIO writes. For zoned devices, f2fs forbids direct IO and forces buffered IO to serialize write IOs. However, the constraint does not apply to read IOs. Cc: stable@vger.kernel.org Fixes: dbf8e63 ("f2fs: remove device type check for direct IO") Signed-off-by: Eunhee Rho <eunhee83.rho@samsung.com> Reviewed-by: Chao Yu <chao@kernel.org> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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