AcoSail/kernel_optimize_test
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235772da3e
kernel_optimize_test/fs/ext4
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Coly Li 235772da3e ext4: remove unncessary call mb_find_buddy() in debugging code 
In __mb_check_buddy(), look at the code below:
  591         fstart = -1;
  592         buddy = mb_find_buddy(e4b, 0, &max);
  593         for (i = 0; i < max; i++) {
  594                 if (!mb_test_bit(i, buddy)) {
  595                         MB_CHECK_ASSERT(i >= e4b->bd_info->bb_first_free);
  596                         if (fstart == -1) {
  597                                 fragments++;
  598                                 fstart = i;
  599                         }
  600                         continue;
  601                 }
  602                 fstart = -1;
  603                 /* check used bits only */
  604                 for (j = 0; j < e4b->bd_blkbits + 1; j++) {
  605                         buddy2 = mb_find_buddy(e4b, j, &max2);
  606                         k = i >> j;
  607                         MB_CHECK_ASSERT(k < max2);
  608                         MB_CHECK_ASSERT(mb_test_bit(k, buddy2));
  609                 }
  610         }
  611         MB_CHECK_ASSERT(!EXT4_MB_GRP_NEED_INIT(e4b->bd_info));
  612         MB_CHECK_ASSERT(e4b->bd_info->bb_fragments == fragments);
  613
  614         grp = ext4_get_group_info(sb, e4b->bd_group);
  615         buddy = mb_find_buddy(e4b, 0, &max);

On line 592, buddy is fetched by mb_find_buddy() with order 0, between
line 593 to line 615, buddy is not changed, therefore there is
no need to fetch buddy again from mb_find_buddy() with order 0 again.

We can safely remove the second mb_find_buddy() on line 615.

Signed-off-by: Coly Li <bosong.ly@taobao.com>
Cc: Alex Tomas <alex@clusterfs.com>
Cc: Theodore Tso <tytso@google.com>
2011-02-24 13:24:18 -05:00
..
acl.c ext2,3,4: provide simple rcu-walk ACL implementation 2011-01-07 17:50:30 +11:00
acl.h fs: provide rcu-walk aware permission i_ops 2011-01-07 17:50:29 +11:00
balloc.c ext4: replace i_delalloc_reserved_flag with EXT4_STATE_DELALLOC_RESERVED 2011-01-10 12:12:36 -05:00
bitmap.c
block_validity.c
dir.c ext4: Use ext4_error_file() to print the pathname to the corrupted inode 2011-01-10 12:10:55 -05:00
ext4_extents.h ext4: drop ec_type from the ext4_ext_cache structure 2011-01-10 12:13:26 -05:00
ext4_jbd2.c
ext4_jbd2.h ext4: dynamically allocate the jbd2_inode in ext4_inode_info as necessary 2011-01-10 12:29:43 -05:00
ext4.h ext4: serialize unaligned asynchronous DIO 2011-02-12 08:17:34 -05:00
extents.c ext4: Fix sparse warning: Using plain integer as NULL pointer 2011-02-21 21:01:42 -05:00
file.c ext4: serialize unaligned asynchronous DIO 2011-02-12 08:17:34 -05:00
fsync.c ext4: flush the i_completed_io_list during ext4_truncate 2011-01-10 12:47:05 -05:00
hash.c
ialloc.c ext4: Fix sparse warning: Using plain integer as NULL pointer 2011-02-21 21:01:42 -05:00
inode.c ext4: Fix sparse warning: Using plain integer as NULL pointer 2011-02-21 21:01:42 -05:00
ioctl.c ext4: Adjust minlen with discard_granularity in the FITRIM ioctl 2011-02-23 17:49:51 -05:00
Kconfig
Makefile
mballoc.c ext4: remove unncessary call mb_find_buddy() in debugging code 2011-02-24 13:24:18 -05:00
mballoc.h
migrate.c ext4: Fix sparse warning: Using plain integer as NULL pointer 2011-02-21 21:01:42 -05:00
move_extent.c
namei.c ext4: add error checking to calls to ext4_handle_dirty_metadata() 2011-01-10 12:46:59 -05:00
page-io.c ext4: Fix sparse warning: Using plain integer as NULL pointer 2011-02-21 21:01:42 -05:00
resize.c ext4: fix compile warnings with EXT4FS_DEBUG enabled 2011-02-21 20:39:58 -05:00
super.c ext4: enable acls and user_xattr by default 2011-02-23 17:51:51 -05:00
symlink.c
xattr_security.c
xattr_trusted.c
xattr_user.c
xattr.c ext4: Fix sparse warning: Using plain integer as NULL pointer 2011-02-21 21:01:42 -05:00
xattr.h