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| author | Fabian Frederick | 2016-09-15 17:55:01 +0200 |
|---|---|---|
| committer | Theodore Ts'o | 2016-09-15 17:55:01 +0200 |
| commit | 518eaa6387df796d54e065e04502e800cae1df80 (patch) | |
| tree | 9b7ce844047f58763185a4a66cb7cd1f80666f51 /fs/ext4/ext4.h | |
| parent | ext4: remove unneeded test in ext4_alloc_file_blocks() (diff) | |
| download | kernel-qcow2-linux-518eaa6387df796d54e065e04502e800cae1df80.tar.gz kernel-qcow2-linux-518eaa6387df796d54e065e04502e800cae1df80.tar.xz kernel-qcow2-linux-518eaa6387df796d54e065e04502e800cae1df80.zip | |
ext4: create EXT4_MAX_BLOCKS() macro
Create a macro to calculate length + offset -> maximum blocks
This adds more readability.
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/ext4.h')
| -rw-r--r-- | fs/ext4/ext4.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 962a0444dc84..282a51b07c57 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -262,6 +262,9 @@ struct ext4_io_submit { (s)->s_first_ino) #endif #define EXT4_BLOCK_ALIGN(size, blkbits) ALIGN((size), (1 << (blkbits))) +#define EXT4_MAX_BLOCKS(size, offset, blkbits) \ + ((EXT4_BLOCK_ALIGN(size + offset, blkbits) >> blkbits) - (offset >> \ + blkbits)) /* Translate a block number to a cluster number */ #define EXT4_B2C(sbi, blk) ((blk) >> (sbi)->s_cluster_bits) |