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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2012-11-29 12:27:00 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-11-29 12:38:44 -0800 |
| commit | ab73857e354ab9e317613cba7db714e2c12c6547 (patch) | |
| tree | de5b6fec7caec530f0dd72c9394a1a7d0b6f9878 /fs/block_dev.c | |
| parent | blockdev: remove bd_block_size_semaphore again (diff) | |
| download | linux-dev-ab73857e354ab9e317613cba7db714e2c12c6547.tar.xz linux-dev-ab73857e354ab9e317613cba7db714e2c12c6547.zip | |
direct-io: don't read inode->i_blkbits multiple times
Since directio can work on a raw block device, and the block size of the
device can change under it, we need to do the same thing that
fs/buffer.c now does: read the block size a single time, using
ACCESS_ONCE().
Reading it multiple times can get different results, which will then
confuse the code because it actually encodes the i_blksize in
relationship to the underlying logical blocksize.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/block_dev.c')
0 files changed, 0 insertions, 0 deletions