[RFC PATCH 19/62] gfs2: switch to ->free_inode()

Al Viro
2019-04-16T17:59:53Z

... and use GFS2_I() to get the containing gfs2_inode by inode;
yes, we can feed the address of the first member of structure
to kmem_cache_free(), but let's do it in an obviously safe way.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/gfs2/super.c | 12 +++---------
1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index ca71163ff7cf..7b8d2306b3d3 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -1736,20 +1736,14 @@ static struct inode *gfs2_alloc_inode(struct super_block *sb)
return &ip->i_inode;
}

-static void gfs2_i_callback(struct rcu_head *head)
+static void gfs2_free_inode(struct inode *inode)
{
- struct inode *inode = container_of(head, struct inode, i_rcu);
- kmem_cache_free(gfs2_inode_cachep, inode);
-}
-
-static void gfs2_destroy_inode(struct inode *inode)
-{
- call_rcu(&inode->i_rcu, gfs2_i_callback);
+ kmem_cache_free(gfs2_inode_cachep, GFS2_I(inode));
}

const struct super_operations gfs2_super_ops = {
.alloc_inode = gfs2_alloc_inode,
- .destroy_inode = gfs2_destroy_inode,
+ .free_inode = gfs2_free_inode,
.write_inode = gfs2_write_inode,
.dirty_inode = gfs2_dirty_inode,
.evict_inode = gfs2_evict_inode,
--
2.11.0