diff options
Diffstat (limited to 'fs/sysfs/inode.c')
| -rw-r--r-- | fs/sysfs/inode.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c index e79e38d52c0..1a81ebce20e 100644 --- a/fs/sysfs/inode.c +++ b/fs/sysfs/inode.c @@ -13,6 +13,7 @@ #include <linux/backing-dev.h> #include <linux/capability.h> #include <linux/errno.h> +#include <asm/semaphore.h> #include "sysfs.h" extern struct super_block * sysfs_sb; @@ -209,6 +210,22 @@ const unsigned char * sysfs_get_name(struct sysfs_dirent *sd) return NULL; } +static inline void orphan_all_buffers(struct inode *node) +{ + struct sysfs_buffer_collection *set = node->i_private; + struct sysfs_buffer *buf; + + mutex_lock(&node->i_mutex); + if (node->i_private) { + list_for_each_entry(buf, &set->associates, associates) { + down(&buf->sem); + buf->orphaned = 1; + up(&buf->sem); + } + } + mutex_unlock(&node->i_mutex); +} + /* * Unhashes the dentry corresponding to given sysfs_dirent @@ -217,16 +234,23 @@ const unsigned char * sysfs_get_name(struct sysfs_dirent *sd) void sysfs_drop_dentry(struct sysfs_dirent * sd, struct dentry * parent) { struct dentry * dentry = sd->s_dentry; + struct inode *inode; if (dentry) { spin_lock(&dcache_lock); spin_lock(&dentry->d_lock); if (!(d_unhashed(dentry) && dentry->d_inode)) { + inode = dentry->d_inode; + spin_lock(&inode->i_lock); + __iget(inode); + spin_unlock(&inode->i_lock); dget_locked(dentry); __d_drop(dentry); spin_unlock(&dentry->d_lock); spin_unlock(&dcache_lock); simple_unlink(parent->d_inode, dentry); + orphan_all_buffers(inode); + iput(inode); } else { spin_unlock(&dentry->d_lock); spin_unlock(&dcache_lock); |