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Message-Id: <b1c5048a0af78a2e27ea7e2ea041fbf41b9495bd.1449584350.git.geliangtang@163.com>
Date: Tue, 8 Dec 2015 22:20:39 +0800
From: Geliang Tang <geliangtang@....com>
To: "Theodore Ts'o" <tytso@....edu>,
Andreas Dilger <adilger.kernel@...ger.ca>
Cc: Geliang Tang <geliangtang@....com>, linux-ext4@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH] ext4: use list_for_each_entry*
Use list_for_each_entry*() instead of list_for_each*() to simplify
the code.
Signed-off-by: Geliang Tang <geliangtang@....com>
---
fs/ext4/mballoc.c | 22 +++++++---------------
fs/ext4/super.c | 27 +++++++++------------------
2 files changed, 16 insertions(+), 33 deletions(-)
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 61eaf74..920fcab 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -565,7 +565,7 @@ static int __mb_check_buddy(struct ext4_buddy *e4b, char *file,
struct ext4_group_info *grp;
int fragments = 0;
int fstart;
- struct list_head *cur;
+ struct ext4_prealloc_space *pa;
void *buddy;
void *buddy2;
@@ -637,10 +637,8 @@ static int __mb_check_buddy(struct ext4_buddy *e4b, char *file,
MB_CHECK_ASSERT(e4b->bd_info->bb_fragments == fragments);
grp = ext4_get_group_info(sb, e4b->bd_group);
- list_for_each(cur, &grp->bb_prealloc_list) {
+ list_for_each_entry(pa, &grp->bb_prealloc_list, pa_group_list) {
ext4_group_t groupnr;
- struct ext4_prealloc_space *pa;
- pa = list_entry(cur, struct ext4_prealloc_space, pa_group_list);
ext4_get_group_no_and_offset(sb, pa->pa_pstart, &groupnr, &k);
MB_CHECK_ASSERT(groupnr == e4b->bd_group);
for (i = 0; i < pa->pa_len; i++)
@@ -2684,12 +2682,11 @@ out:
/* need to called with the ext4 group lock held */
static void ext4_mb_cleanup_pa(struct ext4_group_info *grp)
{
- struct ext4_prealloc_space *pa;
- struct list_head *cur, *tmp;
+ struct ext4_prealloc_space *pa, *tmp;
int count = 0;
- list_for_each_safe(cur, tmp, &grp->bb_prealloc_list) {
- pa = list_entry(cur, struct ext4_prealloc_space, pa_group_list);
+ list_for_each_entry_safe(pa, tmp, &grp->bb_prealloc_list,
+ pa_group_list) {
list_del(&pa->pa_group_list);
count++;
kmem_cache_free(ext4_pspace_cachep, pa);
@@ -3469,7 +3466,6 @@ void ext4_mb_generate_from_pa(struct super_block *sb, void *bitmap,
{
struct ext4_group_info *grp = ext4_get_group_info(sb, group);
struct ext4_prealloc_space *pa;
- struct list_head *cur;
ext4_group_t groupnr;
ext4_grpblk_t start;
int preallocated = 0;
@@ -3483,8 +3479,7 @@ void ext4_mb_generate_from_pa(struct super_block *sb, void *bitmap,
* allocation in buddy when concurrent ext4_mb_put_pa()
* is dropping preallocation
*/
- list_for_each(cur, &grp->bb_prealloc_list) {
- pa = list_entry(cur, struct ext4_prealloc_space, pa_group_list);
+ list_for_each_entry(pa, &grp->bb_prealloc_list, pa_group_list) {
spin_lock(&pa->pa_lock);
ext4_get_group_no_and_offset(sb, pa->pa_pstart,
&groupnr, &start);
@@ -4077,11 +4072,8 @@ static void ext4_mb_show_ac(struct ext4_allocation_context *ac)
struct ext4_group_info *grp = ext4_get_group_info(sb, i);
struct ext4_prealloc_space *pa;
ext4_grpblk_t start;
- struct list_head *cur;
ext4_lock_group(sb, i);
- list_for_each(cur, &grp->bb_prealloc_list) {
- pa = list_entry(cur, struct ext4_prealloc_space,
- pa_group_list);
+ list_for_each_entry(pa, &grp->bb_prealloc_list, pa_group_list) {
spin_lock(&pa->pa_lock);
ext4_get_group_no_and_offset(sb, pa->pa_pstart,
NULL, &start);
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index f1b56ff..3d08fa0 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -766,21 +766,16 @@ static void ext4_blkdev_remove(struct ext4_sb_info *sbi)
}
}
-static inline struct inode *orphan_list_entry(struct list_head *l)
-{
- return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode;
-}
-
static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi)
{
- struct list_head *l;
+ struct ext4_inode_info *ei;
ext4_msg(sb, KERN_ERR, "sb orphan head is %d",
le32_to_cpu(sbi->s_es->s_last_orphan));
printk(KERN_ERR "sb_info orphan list:\n");
- list_for_each(l, &sbi->s_orphan) {
- struct inode *inode = orphan_list_entry(l);
+ list_for_each_entry(ei, &sbi->s_orphan, i_orphan) {
+ struct inode *inode = &ei->vfs_inode;
printk(KERN_ERR " "
"inode %s:%lu at %p: mode %o, nlink %d, next %d\n",
inode->i_sb->s_id, inode->i_ino, inode,
@@ -2668,8 +2663,7 @@ static struct task_struct *ext4_lazyinit_task;
static int ext4_lazyinit_thread(void *arg)
{
struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg;
- struct list_head *pos, *n;
- struct ext4_li_request *elr;
+ struct ext4_li_request *elr, *n;
unsigned long next_wakeup, cur;
BUG_ON(NULL == eli);
@@ -2684,9 +2678,8 @@ cont_thread:
goto exit_thread;
}
- list_for_each_safe(pos, n, &eli->li_request_list) {
- elr = list_entry(pos, struct ext4_li_request,
- lr_request);
+ list_for_each_entry_safe(elr, n, &eli->li_request_list,
+ lr_request) {
if (time_after_eq(jiffies, elr->lr_next_sched)) {
if (ext4_run_li_request(elr) != 0) {
@@ -2744,13 +2737,11 @@ exit_thread:
static void ext4_clear_request_list(void)
{
- struct list_head *pos, *n;
- struct ext4_li_request *elr;
+ struct ext4_li_request *elr, *n;
mutex_lock(&ext4_li_info->li_list_mtx);
- list_for_each_safe(pos, n, &ext4_li_info->li_request_list) {
- elr = list_entry(pos, struct ext4_li_request,
- lr_request);
+ list_for_each_entry_safe(elr, n, &ext4_li_info->li_request_list,
+ lr_request) {
ext4_remove_li_request(elr);
}
mutex_unlock(&ext4_li_info->li_list_mtx);
--
2.5.0
--
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