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authorChristoph Hellwig <hch@lst.de>2007-02-20 13:58:11 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-20 17:10:15 -0800
commit2be3c79046cf90d75d436708a4e0898c7a1f9d51 (patch)
tree2a5727bb2a4132af009afc24e54661dd32d3efe2
parentc9ffec48487849bc277de662a6c29aad64653b99 (diff)
downloadlinux-stericsson-2be3c79046cf90d75d436708a4e0898c7a1f9d51.tar.gz
[PATCH] affs: implement ->drop_inode
affs wants to truncate the inode when the last user goes away, currently it does that through a potentially racy i_count check in ->put_inode. But we already have a method that's called just after the we dropped the last reference, ->drop_inode. This patch implements affs_drop_inode to take advantage of this. Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/affs/affs.h1
-rw-r--r--fs/affs/inode.c17
-rw-r--r--fs/affs/super.c1
3 files changed, 13 insertions, 6 deletions
diff --git a/fs/affs/affs.h b/fs/affs/affs.h
index 7db2d287e9f3..232c69493683 100644
--- a/fs/affs/affs.h
+++ b/fs/affs/affs.h
@@ -171,6 +171,7 @@ extern unsigned long affs_parent_ino(struct inode *dir);
extern struct inode *affs_new_inode(struct inode *dir);
extern int affs_notify_change(struct dentry *dentry, struct iattr *attr);
extern void affs_put_inode(struct inode *inode);
+extern void affs_drop_inode(struct inode *inode);
extern void affs_delete_inode(struct inode *inode);
extern void affs_clear_inode(struct inode *inode);
extern void affs_read_inode(struct inode *inode);
diff --git a/fs/affs/inode.c b/fs/affs/inode.c
index fce6848a4641..c5b9d73c084a 100644
--- a/fs/affs/inode.c
+++ b/fs/affs/inode.c
@@ -243,12 +243,17 @@ affs_put_inode(struct inode *inode)
{
pr_debug("AFFS: put_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink);
affs_free_prealloc(inode);
- if (atomic_read(&inode->i_count) == 1) {
- mutex_lock(&inode->i_mutex);
- if (inode->i_size != AFFS_I(inode)->mmu_private)
- affs_truncate(inode);
- mutex_unlock(&inode->i_mutex);
- }
+}
+
+void
+affs_drop_inode(struct inode *inode)
+{
+ mutex_lock(&inode->i_mutex);
+ if (inode->i_size != AFFS_I(inode)->mmu_private)
+ affs_truncate(inode);
+ mutex_unlock(&inode->i_mutex);
+
+ generic_drop_inode(inode);
}
void
diff --git a/fs/affs/super.c b/fs/affs/super.c
index a324045d8554..c3986a1911b0 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -118,6 +118,7 @@ static const struct super_operations affs_sops = {
.read_inode = affs_read_inode,
.write_inode = affs_write_inode,
.put_inode = affs_put_inode,
+ .drop_inode = affs_drop_inode,
.delete_inode = affs_delete_inode,
.clear_inode = affs_clear_inode,
.put_super = affs_put_super,