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| author | Christoph Hellwig <hch@lst.de> | 2016-10-20 15:12:15 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2016-10-28 08:48:54 -0600 |
| commit | 87374179c535a98337569904727aa02f960fe79e (patch) | |
| tree | 6c71566fb8bda79fbf683e60e207739cbae50bad /include/linux/fs.h | |
| parent | ef295ecf090d3e86e5b742fc6ab34f1122a43773 (diff) | |
| download | linux-stable-87374179c535a98337569904727aa02f960fe79e.tar.gz linux-stable-87374179c535a98337569904727aa02f960fe79e.tar.bz2 linux-stable-87374179c535a98337569904727aa02f960fe79e.zip | |
block: add a proper block layer data direction encoding
Currently the block layer op_is_write, bio_data_dir and rq_data_dir
helper treat every operation that is not a READ as a data out operation.
This worked surprisingly long, but the new REQ_OP_ZONE_REPORT operation
actually adds a second operation that reads data from the device.
Surprisingly nothing critical relied on this direction, but this might
be a good opportunity to properly fix this issue up.
We take a little inspiration and use the least significant bit of the
operation number to encode the data direction, which just requires us
to renumber the operations to fix this scheme.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Shaun Tancheff <shaun.tancheff@seagate.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'include/linux/fs.h')
| -rw-r--r-- | include/linux/fs.h | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index 16d2b6e874d6..e3e878f12b25 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2499,11 +2499,6 @@ extern void make_bad_inode(struct inode *); extern bool is_bad_inode(struct inode *); #ifdef CONFIG_BLOCK -static inline bool op_is_write(unsigned int op) -{ - return op == REQ_OP_READ ? false : true; -} - /* * return data direction, READ or WRITE */ |