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925c86a19b
Add a new config option that controls building the buffer_head code, and select it from all file systems and stacking drivers that need it. For the block device nodes and alternative iomap based buffered I/O path is provided when buffer_head support is not enabled, and iomap needs a a small tweak to define the IOMAP_F_BUFFER_HEAD flag to 0 to not call into the buffer_head code when it doesn't exist. Otherwise this is just Kconfig and ifdef changes. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Luis Chamberlain <mcgrof@kernel.org> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/20230801172201.1923299-7-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
16 lines
578 B
Text
16 lines
578 B
Text
# SPDX-License-Identifier: GPL-2.0-only
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config QNX4FS_FS
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tristate "QNX4 file system support (read only)"
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depends on BLOCK
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select BUFFER_HEAD
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help
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This is the file system used by the real-time operating systems
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QNX 4 and QNX 6 (the latter is also called QNX RTP).
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Further information is available at <http://www.qnx.com/>.
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Say Y if you intend to mount QNX hard disks or floppies.
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To compile this file system support as a module, choose M here: the
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module will be called qnx4.
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If you don't know whether you need it, then you don't need it:
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answer N.
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