The patch titled
sysfs: flatten cleanup paths in sysfs_add_link() and create_dir()
has been added to the -mm tree. Its filename is
sysfs-flatten-cleanup-paths-in-sysfs_add_link-and-create_dir.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: sysfs: flatten cleanup paths in sysfs_add_link() and create_dir()
From: Tejun Heo <htejun@xxxxxxxxx>
Flatten cleanup paths in sysfs_add_link() and create_dir() to improve
readability and ease further changes to these functions. This is in
preparation of object reference simplification.
Signed-off-by: Tejun Heo <htejun@xxxxxxxxx>
Cc: Cornelia Huck <cornelia.huck@xxxxxxxxxx>
Cc: Dipankar Sarma <dipankar@xxxxxxxxxx>
Cc: Maneesh Soni <maneesh@xxxxxxxxxx>
Cc: Greg KH <greg@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/sysfs/dir.c | 73 +++++++++++++++++++++++++------------------
fs/sysfs/symlink.c | 25 ++++++++------
2 files changed, 57 insertions(+), 41 deletions(-)
diff -puN fs/sysfs/dir.c~sysfs-flatten-cleanup-paths-in-sysfs_add_link-and-create_dir fs/sysfs/dir.c
--- a/fs/sysfs/dir.c~sysfs-flatten-cleanup-paths-in-sysfs_add_link-and-create_dir
+++ a/fs/sysfs/dir.c
@@ -159,40 +159,53 @@ static int init_symlink(struct inode * i
return 0;
}
-static int create_dir(struct kobject * k, struct dentry * p,
- const char * n, struct dentry ** d)
+static int create_dir(struct kobject *kobj, struct dentry *parent,
+ const char *name, struct dentry **p_dentry)
{
int error;
umode_t mode = S_IFDIR| S_IRWXU | S_IRUGO | S_IXUGO;
+ struct dentry *dentry;
+ struct sysfs_dirent *sd;
- mutex_lock(&p->d_inode->i_mutex);
- *d = lookup_one_len(n, p, strlen(n));
- if (!IS_ERR(*d)) {
- if (sysfs_dirent_exist(p->d_fsdata, n))
- error = -EEXIST;
- else
- error = sysfs_make_dirent(p->d_fsdata, *d, k, mode,
- SYSFS_DIR);
- if (!error) {
- error = sysfs_create(*d, mode, init_dir);
- if (!error) {
- inc_nlink(p->d_inode);
- (*d)->d_op = &sysfs_dentry_ops;
- d_rehash(*d);
- }
- }
- if (error && (error != -EEXIST)) {
- struct sysfs_dirent *sd = (*d)->d_fsdata;
- if (sd) {
- list_del_init(&sd->s_sibling);
- sysfs_put(sd);
- }
- d_drop(*d);
- }
- dput(*d);
- } else
- error = PTR_ERR(*d);
- mutex_unlock(&p->d_inode->i_mutex);
+ mutex_lock(&parent->d_inode->i_mutex);
+
+ dentry = lookup_one_len(name, parent, strlen(name));
+ if (IS_ERR(dentry)) {
+ error = PTR_ERR(dentry);
+ goto out_unlock;
+ }
+
+ error = -EEXIST;
+ if (sysfs_dirent_exist(parent->d_fsdata, name))
+ goto out_dput;
+
+ error = sysfs_make_dirent(parent->d_fsdata, dentry, kobj, mode,
+ SYSFS_DIR);
+ if (error)
+ goto out_drop;
+
+ error = sysfs_create(dentry, mode, init_dir);
+ if (error)
+ goto out_sput;
+
+ inc_nlink(parent->d_inode);
+ dentry->d_op = &sysfs_dentry_ops;
+ d_rehash(dentry);
+
+ *p_dentry = dentry;
+ error = 0;
+ goto out_dput;
+
+ out_sput:
+ sd = dentry->d_fsdata;
+ list_del_init(&sd->s_sibling);
+ sysfs_put(sd);
+ out_drop:
+ d_drop(dentry);
+ out_dput:
+ dput(dentry);
+ out_unlock:
+ mutex_unlock(&parent->d_inode->i_mutex);
return error;
}
diff -puN fs/sysfs/symlink.c~sysfs-flatten-cleanup-paths-in-sysfs_add_link-and-create_dir fs/sysfs/symlink.c
--- a/fs/sysfs/symlink.c~sysfs-flatten-cleanup-paths-in-sysfs_add_link-and-create_dir
+++ a/fs/sysfs/symlink.c
@@ -49,30 +49,33 @@ static int sysfs_add_link(struct dentry
{
struct sysfs_dirent * parent_sd = parent->d_fsdata;
struct sysfs_symlink * sl;
- int error = 0;
+ int error;
error = -ENOMEM;
- sl = kmalloc(sizeof(*sl), GFP_KERNEL);
+ sl = kzalloc(sizeof(*sl), GFP_KERNEL);
if (!sl)
- goto exit1;
+ goto err_out;
sl->link_name = kmalloc(strlen(name) + 1, GFP_KERNEL);
if (!sl->link_name)
- goto exit2;
+ goto err_out;
strcpy(sl->link_name, name);
sl->target_kobj = kobject_get(target);
error = sysfs_make_dirent(parent_sd, NULL, sl, S_IFLNK|S_IRWXUGO,
SYSFS_KOBJ_LINK);
- if (!error)
- return 0;
+ if (error)
+ goto err_out;
+
+ return 0;
- kobject_put(target);
- kfree(sl->link_name);
-exit2:
- kfree(sl);
-exit1:
+ err_out:
+ if (sl) {
+ kobject_put(sl->target_kobj);
+ kfree(sl->link_name);
+ kfree(sl);
+ }
return error;
}
_
Patches currently in -mm which might be from htejun@xxxxxxxxx are
origin.patch
revert-gregkh-driver-sysfs-crash-debugging.patch
sysfs-fix-i_ino-handling-in-sysfs.patch
sysfs-fix-error-handling-in-binattr-write.patch
sysfs-move-release_sysfs_dirent-to-dirc.patch
sysfs-flatten-cleanup-paths-in-sysfs_add_link-and-create_dir.patch
sysfs-consolidate-sysfs_dirent-creation-functions.patch
sysfs-add-sysfs_dirent-s_parent.patch
sysfs-add-sysfs_dirent-s_name.patch
sysfs-make-sysfs_dirent-s_element-a-union.patch
sysfs-implement-kobj_sysfs_assoc_lock.patch
sysfs-reimplement-symlink-using-sysfs_dirent-tree.patch
sysfs-implement-bin_buffer.patch
sysfs-implement-sysfs_dirent-active-reference-and-immediate-disconnect.patch
sysfs-kill-attribute-file-orphaning.patch
sysfs-kill-unnecessary-attribute-owner.patch
sysfs-kill-unnecessary-attribute-owner-fix.patch
git-libata-all.patch
sata_nv-add-back-some-verbosity-into-adma-error_handler.patch
optional-led-trigger-for-libata.patch
drivers-ata-pata_cmd640c-fix-build-with-config_pm=n.patch
git-scsi-misc.patch
introduce-config_has_dma.patch
-
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
