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gfs2: Improve gfs2_block_map comment

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Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
This commit is contained in:
Andreas Gruenbacher 2018-03-05 06:24:28 -07:00 committed by Bob Peterson
parent b9e03f1861
commit d39d18e0ef
1 changed files with 11 additions and 4 deletions
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15
fs/gfs2/bmap.c
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@ -812,15 +812,22 @@ do_alloc:
}
/**
* gfs2_block_map - Map a block from an inode to a disk block
* gfs2_block_map - Map one or more blocks of an inode to a disk block
* @inode: The inode
* @lblock: The logical block number
* @bh_map: The bh to be mapped
* @create: True if its ok to alloc blocks to satify the request
*
* Sets buffer_mapped() if successful, sets buffer_boundary() if a
* read of metadata will be required before the next block can be
* mapped. Sets buffer_new() if new blocks were allocated.
* The size of the requested mapping is defined in bh_map->b_size.
*
* Clears buffer_mapped(bh_map) and leaves bh_map->b_size unchanged
* when @lblock is not mapped. Sets buffer_mapped(bh_map) and
* bh_map->b_size to indicate the size of the mapping when @lblock and
* successive blocks are mapped, up to the requested size.
*
* Sets buffer_boundary() if a read of metadata will be required
* before the next block can be mapped. Sets buffer_new() if new
* blocks were allocated.
*
* Returns: errno
*/