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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>
20 lines
710 B
Plaintext
20 lines
710 B
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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config UDF_FS
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tristate "UDF file system support"
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select BUFFER_HEAD
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select CRC_ITU_T
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select NLS
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select LEGACY_DIRECT_IO
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help
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This is a file system used on some CD-ROMs and DVDs. Since the
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file system is supported by multiple operating systems and is more
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compatible with standard unix file systems, it is also suitable for
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removable USB disks. Say Y if you intend to mount DVD discs or CDRW's
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written in packet mode, or if you want to use UDF for removable USB
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disks. Please read <file:Documentation/filesystems/udf.rst>.
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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 udf.
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If unsure, say N.
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