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Commit 7c786059 authored by Coly Li's avatar Coly Li Committed by Theodore Ts'o
Browse files

mballoc: add comments to ext4_mb_mark_free_simple() 



This patch adds comments to ext4_mb_mark_free_simple to make it more
understandable.

Signed-off-by: default avatarColy Li <bosong.ly@taobao.com>
Cc: Alex Tomas <alex@clusterfs.com>
Cc: Theodore Tso <tytso@google.com>
parent 235772da

fs/ext4/mballoc.c

+6 −1
Original line number Diff line number Diff line
@@ -635,7 +635,12 @@ static int __mb_check_buddy(struct ext4_buddy *e4b, char *file, 
#define mb_check_buddy(e4b)

#endif



/* FIXME!! need more doc */

/*

 * Divide 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)