This patch tries to add comments to make ext4_mb_mark_free_simple more readable. Signed-off-by: Coly Li <bosong.ly@xxxxxxxxxx> Cc: Alex Tomas <alex@xxxxxxxxxxxxx> Cc: Theodore Tso <tytso@xxxxxxxxxx> --- fs/ext4/mballoc.c | 7 ++++++- 1 files changed, 6 insertions(+), 1 deletions(-) diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index 458dce0..c5534f4 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -630,7 +630,12 @@ static int __mb_check_buddy(struct ext4_buddy *e4b, char *file, #define mb_check_buddy(e4b) #endif -/* FIXME!! need more doc */ +/* + * Devide blocks started from @first with length @len into + * smaller chunks with power of 2 blocks. + * Clear the bits in bitmap which the blocks of the chunk(s) covered, + * then increase bb_counters[] for corresponded chunk size. + */ static void ext4_mb_mark_free_simple(struct super_block *sb, void *buddy, ext4_grpblk_t first, ext4_grpblk_t len, struct ext4_group_info *grp) -- 1.7.3.4 -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
