2007-07-26 20:32:40

by Andrew Morton

[permalink] [raw]
Subject: + remove-unused-bh-in-calls-to-ext234_get_group_desc.patch added to -mm tree


The patch titled
remove unused bh in calls to ext234_get_group_desc
has been added to the -mm tree. Its filename is
remove-unused-bh-in-calls-to-ext234_get_group_desc.patch

*** Remember to use Documentation/SubmitChecklist when testing your code ***

See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this

------------------------------------------------------
Subject: remove unused bh in calls to ext234_get_group_desc
From: Eric Sandeen <[email protected]>

ext[234]_get_group_desc never tests the bh argument, and only sets it if it
is passed in; it is perfectly happy with a NULL bh argument. But, many
callers send one in and never use it. May as well call with NULL like
other callers who don't use the bh.

Signed-off-by: Eric Sandeen <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---

fs/ext2/ialloc.c | 24 ++++++++----------------
fs/ext2/inode.c | 2 +-
fs/ext3/ialloc.c | 17 +++++++----------
fs/ext4/ialloc.c | 17 +++++++----------
4 files changed, 23 insertions(+), 37 deletions(-)

diff -puN fs/ext2/ialloc.c~remove-unused-bh-in-calls-to-ext234_get_group_desc fs/ext2/ialloc.c
--- a/fs/ext2/ialloc.c~remove-unused-bh-in-calls-to-ext234_get_group_desc
+++ a/fs/ext2/ialloc.c
@@ -177,7 +177,6 @@ static void ext2_preread_inode(struct in
unsigned long block_group;
unsigned long offset;
unsigned long block;
- struct buffer_head *bh;
struct ext2_group_desc * gdp;
struct backing_dev_info *bdi;

@@ -188,7 +187,7 @@ static void ext2_preread_inode(struct in
return;

block_group = (inode->i_ino - 1) / EXT2_INODES_PER_GROUP(inode->i_sb);
- gdp = ext2_get_group_desc(inode->i_sb, block_group, &bh);
+ gdp = ext2_get_group_desc(inode->i_sb, block_group, NULL);
if (gdp == NULL)
return;

@@ -217,11 +216,10 @@ static int find_group_dir(struct super_b
int ngroups = EXT2_SB(sb)->s_groups_count;
int avefreei = ext2_count_free_inodes(sb) / ngroups;
struct ext2_group_desc *desc, *best_desc = NULL;
- struct buffer_head *bh, *best_bh = NULL;
int group, best_group = -1;

for (group = 0; group < ngroups; group++) {
- desc = ext2_get_group_desc (sb, group, &bh);
+ desc = ext2_get_group_desc (sb, group, NULL);
if (!desc || !desc->bg_free_inodes_count)
continue;
if (le16_to_cpu(desc->bg_free_inodes_count) < avefreei)
@@ -231,7 +229,6 @@ static int find_group_dir(struct super_b
le16_to_cpu(best_desc->bg_free_blocks_count))) {
best_group = group;
best_desc = desc;
- best_bh = bh;
}
}
if (!best_desc)
@@ -284,7 +281,6 @@ static int find_group_orlov(struct super
int max_debt, max_dirs, min_blocks, min_inodes;
int group = -1, i;
struct ext2_group_desc *desc;
- struct buffer_head *bh;

freei = percpu_counter_read_positive(&sbi->s_freeinodes_counter);
avefreei = freei / ngroups;
@@ -295,7 +291,6 @@ static int find_group_orlov(struct super
if ((parent == sb->s_root->d_inode) ||
(EXT2_I(parent)->i_flags & EXT2_TOPDIR_FL)) {
struct ext2_group_desc *best_desc = NULL;
- struct buffer_head *best_bh = NULL;
int best_ndir = inodes_per_group;
int best_group = -1;

@@ -303,7 +298,7 @@ static int find_group_orlov(struct super
parent_group = (unsigned)group % ngroups;
for (i = 0; i < ngroups; i++) {
group = (parent_group + i) % ngroups;
- desc = ext2_get_group_desc (sb, group, &bh);
+ desc = ext2_get_group_desc (sb, group, NULL);
if (!desc || !desc->bg_free_inodes_count)
continue;
if (le16_to_cpu(desc->bg_used_dirs_count) >= best_ndir)
@@ -315,11 +310,9 @@ static int find_group_orlov(struct super
best_group = group;
best_ndir = le16_to_cpu(desc->bg_used_dirs_count);
best_desc = desc;
- best_bh = bh;
}
if (best_group >= 0) {
desc = best_desc;
- bh = best_bh;
group = best_group;
goto found;
}
@@ -345,7 +338,7 @@ static int find_group_orlov(struct super

for (i = 0; i < ngroups; i++) {
group = (parent_group + i) % ngroups;
- desc = ext2_get_group_desc (sb, group, &bh);
+ desc = ext2_get_group_desc (sb, group, NULL);
if (!desc || !desc->bg_free_inodes_count)
continue;
if (sbi->s_debts[group] >= max_debt)
@@ -362,7 +355,7 @@ static int find_group_orlov(struct super
fallback:
for (i = 0; i < ngroups; i++) {
group = (parent_group + i) % ngroups;
- desc = ext2_get_group_desc (sb, group, &bh);
+ desc = ext2_get_group_desc (sb, group, NULL);
if (!desc || !desc->bg_free_inodes_count)
continue;
if (le16_to_cpu(desc->bg_free_inodes_count) >= avefreei)
@@ -389,14 +382,13 @@ static int find_group_other(struct super
int parent_group = EXT2_I(parent)->i_block_group;
int ngroups = EXT2_SB(sb)->s_groups_count;
struct ext2_group_desc *desc;
- struct buffer_head *bh;
int group, i;

/*
* Try to place the inode in its parent directory
*/
group = parent_group;
- desc = ext2_get_group_desc (sb, group, &bh);
+ desc = ext2_get_group_desc (sb, group, NULL);
if (desc && le16_to_cpu(desc->bg_free_inodes_count) &&
le16_to_cpu(desc->bg_free_blocks_count))
goto found;
@@ -420,7 +412,7 @@ static int find_group_other(struct super
group += i;
if (group >= ngroups)
group -= ngroups;
- desc = ext2_get_group_desc (sb, group, &bh);
+ desc = ext2_get_group_desc (sb, group, NULL);
if (desc && le16_to_cpu(desc->bg_free_inodes_count) &&
le16_to_cpu(desc->bg_free_blocks_count))
goto found;
@@ -434,7 +426,7 @@ static int find_group_other(struct super
for (i = 0; i < ngroups; i++) {
if (++group >= ngroups)
group = 0;
- desc = ext2_get_group_desc (sb, group, &bh);
+ desc = ext2_get_group_desc (sb, group, NULL);
if (desc && le16_to_cpu(desc->bg_free_inodes_count))
goto found;
}
diff -puN fs/ext2/inode.c~remove-unused-bh-in-calls-to-ext234_get_group_desc fs/ext2/inode.c
--- a/fs/ext2/inode.c~remove-unused-bh-in-calls-to-ext234_get_group_desc
+++ a/fs/ext2/inode.c
@@ -1012,7 +1012,7 @@ static struct ext2_inode *ext2_get_inode
goto Einval;

block_group = (ino - 1) / EXT2_INODES_PER_GROUP(sb);
- gdp = ext2_get_group_desc(sb, block_group, &bh);
+ gdp = ext2_get_group_desc(sb, block_group, NULL);
if (!gdp)
goto Egdp;
/*
diff -puN fs/ext3/ialloc.c~remove-unused-bh-in-calls-to-ext234_get_group_desc fs/ext3/ialloc.c
--- a/fs/ext3/ialloc.c~remove-unused-bh-in-calls-to-ext234_get_group_desc
+++ a/fs/ext3/ialloc.c
@@ -204,14 +204,13 @@ static int find_group_dir(struct super_b
int ngroups = EXT3_SB(sb)->s_groups_count;
unsigned int freei, avefreei;
struct ext3_group_desc *desc, *best_desc = NULL;
- struct buffer_head *bh;
int group, best_group = -1;

freei = percpu_counter_read_positive(&EXT3_SB(sb)->s_freeinodes_counter);
avefreei = freei / ngroups;

for (group = 0; group < ngroups; group++) {
- desc = ext3_get_group_desc (sb, group, &bh);
+ desc = ext3_get_group_desc (sb, group, NULL);
if (!desc || !desc->bg_free_inodes_count)
continue;
if (le16_to_cpu(desc->bg_free_inodes_count) < avefreei)
@@ -269,7 +268,6 @@ static int find_group_orlov(struct super
ext3_grpblk_t min_blocks;
int group = -1, i;
struct ext3_group_desc *desc;
- struct buffer_head *bh;

freei = percpu_counter_read_positive(&sbi->s_freeinodes_counter);
avefreei = freei / ngroups;
@@ -286,7 +284,7 @@ static int find_group_orlov(struct super
parent_group = (unsigned)group % ngroups;
for (i = 0; i < ngroups; i++) {
group = (parent_group + i) % ngroups;
- desc = ext3_get_group_desc (sb, group, &bh);
+ desc = ext3_get_group_desc (sb, group, NULL);
if (!desc || !desc->bg_free_inodes_count)
continue;
if (le16_to_cpu(desc->bg_used_dirs_count) >= best_ndir)
@@ -319,7 +317,7 @@ static int find_group_orlov(struct super

for (i = 0; i < ngroups; i++) {
group = (parent_group + i) % ngroups;
- desc = ext3_get_group_desc (sb, group, &bh);
+ desc = ext3_get_group_desc (sb, group, NULL);
if (!desc || !desc->bg_free_inodes_count)
continue;
if (le16_to_cpu(desc->bg_used_dirs_count) >= max_dirs)
@@ -334,7 +332,7 @@ static int find_group_orlov(struct super
fallback:
for (i = 0; i < ngroups; i++) {
group = (parent_group + i) % ngroups;
- desc = ext3_get_group_desc (sb, group, &bh);
+ desc = ext3_get_group_desc (sb, group, NULL);
if (!desc || !desc->bg_free_inodes_count)
continue;
if (le16_to_cpu(desc->bg_free_inodes_count) >= avefreei)
@@ -358,14 +356,13 @@ static int find_group_other(struct super
int parent_group = EXT3_I(parent)->i_block_group;
int ngroups = EXT3_SB(sb)->s_groups_count;
struct ext3_group_desc *desc;
- struct buffer_head *bh;
int group, i;

/*
* Try to place the inode in its parent directory
*/
group = parent_group;
- desc = ext3_get_group_desc (sb, group, &bh);
+ desc = ext3_get_group_desc (sb, group, NULL);
if (desc && le16_to_cpu(desc->bg_free_inodes_count) &&
le16_to_cpu(desc->bg_free_blocks_count))
return group;
@@ -389,7 +386,7 @@ static int find_group_other(struct super
group += i;
if (group >= ngroups)
group -= ngroups;
- desc = ext3_get_group_desc (sb, group, &bh);
+ desc = ext3_get_group_desc (sb, group, NULL);
if (desc && le16_to_cpu(desc->bg_free_inodes_count) &&
le16_to_cpu(desc->bg_free_blocks_count))
return group;
@@ -403,7 +400,7 @@ static int find_group_other(struct super
for (i = 0; i < ngroups; i++) {
if (++group >= ngroups)
group = 0;
- desc = ext3_get_group_desc (sb, group, &bh);
+ desc = ext3_get_group_desc (sb, group, NULL);
if (desc && le16_to_cpu(desc->bg_free_inodes_count))
return group;
}
diff -puN fs/ext4/ialloc.c~remove-unused-bh-in-calls-to-ext234_get_group_desc fs/ext4/ialloc.c
--- a/fs/ext4/ialloc.c~remove-unused-bh-in-calls-to-ext234_get_group_desc
+++ a/fs/ext4/ialloc.c
@@ -204,14 +204,13 @@ static int find_group_dir(struct super_b
int ngroups = EXT4_SB(sb)->s_groups_count;
unsigned int freei, avefreei;
struct ext4_group_desc *desc, *best_desc = NULL;
- struct buffer_head *bh;
int group, best_group = -1;

freei = percpu_counter_read_positive(&EXT4_SB(sb)->s_freeinodes_counter);
avefreei = freei / ngroups;

for (group = 0; group < ngroups; group++) {
- desc = ext4_get_group_desc (sb, group, &bh);
+ desc = ext4_get_group_desc (sb, group, NULL);
if (!desc || !desc->bg_free_inodes_count)
continue;
if (le16_to_cpu(desc->bg_free_inodes_count) < avefreei)
@@ -269,7 +268,6 @@ static int find_group_orlov(struct super
ext4_grpblk_t min_blocks;
int group = -1, i;
struct ext4_group_desc *desc;
- struct buffer_head *bh;

freei = percpu_counter_read_positive(&sbi->s_freeinodes_counter);
avefreei = freei / ngroups;
@@ -287,7 +285,7 @@ static int find_group_orlov(struct super
parent_group = (unsigned)group % ngroups;
for (i = 0; i < ngroups; i++) {
group = (parent_group + i) % ngroups;
- desc = ext4_get_group_desc (sb, group, &bh);
+ desc = ext4_get_group_desc (sb, group, NULL);
if (!desc || !desc->bg_free_inodes_count)
continue;
if (le16_to_cpu(desc->bg_used_dirs_count) >= best_ndir)
@@ -322,7 +320,7 @@ static int find_group_orlov(struct super

for (i = 0; i < ngroups; i++) {
group = (parent_group + i) % ngroups;
- desc = ext4_get_group_desc (sb, group, &bh);
+ desc = ext4_get_group_desc (sb, group, NULL);
if (!desc || !desc->bg_free_inodes_count)
continue;
if (le16_to_cpu(desc->bg_used_dirs_count) >= max_dirs)
@@ -337,7 +335,7 @@ static int find_group_orlov(struct super
fallback:
for (i = 0; i < ngroups; i++) {
group = (parent_group + i) % ngroups;
- desc = ext4_get_group_desc (sb, group, &bh);
+ desc = ext4_get_group_desc (sb, group, NULL);
if (!desc || !desc->bg_free_inodes_count)
continue;
if (le16_to_cpu(desc->bg_free_inodes_count) >= avefreei)
@@ -361,14 +359,13 @@ static int find_group_other(struct super
int parent_group = EXT4_I(parent)->i_block_group;
int ngroups = EXT4_SB(sb)->s_groups_count;
struct ext4_group_desc *desc;
- struct buffer_head *bh;
int group, i;

/*
* Try to place the inode in its parent directory
*/
group = parent_group;
- desc = ext4_get_group_desc (sb, group, &bh);
+ desc = ext4_get_group_desc (sb, group, NULL);
if (desc && le16_to_cpu(desc->bg_free_inodes_count) &&
le16_to_cpu(desc->bg_free_blocks_count))
return group;
@@ -392,7 +389,7 @@ static int find_group_other(struct super
group += i;
if (group >= ngroups)
group -= ngroups;
- desc = ext4_get_group_desc (sb, group, &bh);
+ desc = ext4_get_group_desc (sb, group, NULL);
if (desc && le16_to_cpu(desc->bg_free_inodes_count) &&
le16_to_cpu(desc->bg_free_blocks_count))
return group;
@@ -406,7 +403,7 @@ static int find_group_other(struct super
for (i = 0; i < ngroups; i++) {
if (++group >= ngroups)
group = 0;
- desc = ext4_get_group_desc (sb, group, &bh);
+ desc = ext4_get_group_desc (sb, group, NULL);
if (desc && le16_to_cpu(desc->bg_free_inodes_count))
return group;
}
_

Patches currently in -mm which might be from [email protected] are

fix-inode_table-test-in-ext234_check_descriptors.patch
udf-fix-uid-and-gid-mount-option-ignorance.patch
remove-unused-bh-in-calls-to-ext234_get_group_desc.patch