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>
17 lines
659 B
Plaintext
17 lines
659 B
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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config EFS_FS
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tristate "EFS 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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EFS is an older file system used for non-ISO9660 CD-ROMs and hard
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disk partitions by SGI's IRIX operating system (IRIX 6.0 and newer
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uses the XFS file system for hard disk partitions however).
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This implementation only offers read-only access. If you don't know
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what all this is about, it's safe to say N. For more information
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about EFS see its home page at <http://aeschi.ch.eu.org/efs/>.
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To compile the EFS file system support as a module, choose M here: the
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module will be called efs.
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