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| author | Christoph Hellwig <hch@lst.de> | 2023-08-01 19:22:01 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-08-02 09:13:09 -0600 |
| commit | 925c86a19bacf8ce10eb666328fb3fa5aff7b951 (patch) | |
| tree | e5724b45449d43a6a695ff2ff0a1276e70a7ccf7 /fs/Kconfig | |
| parent | 487c607df790d366e67a7d6a30adf785cdd98e55 (diff) | |
| download | linux-925c86a19bacf8ce10eb666328fb3fa5aff7b951.tar.gz linux-925c86a19bacf8ce10eb666328fb3fa5aff7b951.tar.bz2 linux-925c86a19bacf8ce10eb666328fb3fa5aff7b951.zip | |
fs: add CONFIG_BUFFER_HEAD
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>
Diffstat (limited to 'fs/Kconfig')
| -rw-r--r-- | fs/Kconfig | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/Kconfig b/fs/Kconfig index 18d034ec7953..e8b17c81b83a 100644 --- a/fs/Kconfig +++ b/fs/Kconfig @@ -18,8 +18,12 @@ config VALIDATE_FS_PARSER config FS_IOMAP bool +config BUFFER_HEAD + bool + # old blockdev_direct_IO implementation. Use iomap for new code instead config LEGACY_DIRECT_IO + depends on BUFFER_HEAD bool if BLOCK |