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Diffstat (limited to 'fs/sysfs')
-rw-r--r--fs/sysfs/dir.c8
-rw-r--r--fs/sysfs/sysfs.h1
2 files changed, 8 insertions, 1 deletions
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index 079122695675..e9fddcc59447 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -15,6 +15,7 @@
DECLARE_RWSEM(sysfs_rename_sem);
spinlock_t sysfs_lock = SPIN_LOCK_UNLOCKED;
+spinlock_t kobj_sysfs_assoc_lock = SPIN_LOCK_UNLOCKED;
static spinlock_t sysfs_ino_lock = SPIN_LOCK_UNLOCKED;
static DEFINE_IDA(sysfs_ino_ida);
@@ -426,8 +427,13 @@ static void __sysfs_remove_dir(struct dentry *dentry)
void sysfs_remove_dir(struct kobject * kobj)
{
- __sysfs_remove_dir(kobj->dentry);
+ struct dentry *d = kobj->dentry;
+
+ spin_lock(&kobj_sysfs_assoc_lock);
kobj->dentry = NULL;
+ spin_unlock(&kobj_sysfs_assoc_lock);
+
+ __sysfs_remove_dir(d);
}
int sysfs_rename_dir(struct kobject * kobj, struct dentry *new_parent,
diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h
index 39ab0481379c..718e2e123fae 100644
--- a/fs/sysfs/sysfs.h
+++ b/fs/sysfs/sysfs.h
@@ -62,6 +62,7 @@ extern void sysfs_drop_dentry(struct sysfs_dirent *sd, struct dentry *parent);
extern int sysfs_setattr(struct dentry *dentry, struct iattr *iattr);
extern spinlock_t sysfs_lock;
+extern spinlock_t kobj_sysfs_assoc_lock;
extern struct rw_semaphore sysfs_rename_sem;
extern struct super_block * sysfs_sb;
extern const struct file_operations sysfs_dir_operations;