UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

ext2: Simplify initialization in ext2_try_to_allocate() 

Somewhat simplify the logic initializing search start and end in
ext2_try_to_allocate(). No functional change.

Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jan Kara 2019-11-06 16:39:26 +01:00
parent 90f3741c2b
commit cf4eb321b3
1 changed files with 5 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
fs/ext2/balloc.c
View File

@ -671,29 +671,17 @@ ext2_try_to_allocate(struct super_block *sb, int group,
ext2_grpblk_t start, end;
unsigned long num = 0;
start = 0;
end = group_last_block - group_first_block + 1;
/* we do allocation within the reservation window if we have a window */
if (my_rsv) {
if (my_rsv->_rsv_start >= group_first_block)
start = my_rsv->_rsv_start - group_first_block;
else
/* reservation window cross group boundary */
start = 0;
end = my_rsv->_rsv_end - group_first_block + 1;
if (end > group_last_block - group_first_block + 1)
/* reservation window crosses group boundary */
end = group_last_block - group_first_block + 1;
if ((start <= grp_goal) && (grp_goal < end))
start = grp_goal;
else
if (my_rsv->_rsv_end < group_last_block)
end = my_rsv->_rsv_end - group_first_block + 1;
if (grp_goal < start || grp_goal >= end)
grp_goal = -1;
} else {
if (grp_goal > 0)
start = grp_goal;
else
start = 0;
end = group_last_block - group_first_block + 1;
}
BUG_ON(start > EXT2_BLOCKS_PER_GROUP(sb));
repeat: