Essentially, the minimal variant of ->evict_inode(). It's
a trimmed-down clear_inode(), sans any fs callbacks. Once
it returns we know that no async writeback will be happening;
every ->evict_inode() instance should do that once and do that
before doing anything ->write_inode() could interfere with
(e.g. freeing the on-disk inode).
Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
---
fs/hugetlbfs/inode.c | 2 +-
fs/inode.c | 12 ++++++++++++
include/linux/fs.h | 1 +
3 files changed, 14 insertions(+), 1 deletions(-)
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index bf1a2f4..6e5bd42 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -374,7 +374,7 @@ static void truncate_hugepages(struct inode *inode, loff_t lstart)
static void hugetlbfs_evict_inode(struct inode *inode)
{
truncate_hugepages(inode, 0);
- clear_inode(inode);
+ end_writeback(inode);
}
static inline void
diff --git a/fs/inode.c b/fs/inode.c
index 139d475..3f45360 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -294,6 +294,18 @@ void __iget(struct inode *inode)
inodes_stat.nr_unused--;
}
+void end_writeback(struct inode *inode)
+{
+ might_sleep();
+ BUG_ON(inode->i_data.nrpages);
+ BUG_ON(!list_empty(&inode->i_data.private_list));
+ BUG_ON(!(inode->i_state & I_FREEING));
+ BUG_ON(inode->i_state & I_CLEAR);
+ inode_sync_wait(inode);
+ inode->i_state = I_FREEING | I_CLEAR;
+}
+EXPORT_SYMBOL(end_writeback);
+
/**
* clear_inode - clear an inode
* @inode: inode to clear
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 788b003..cea7283 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2170,6 +2170,7 @@ extern void unlock_new_inode(struct inode *);
extern void __iget(struct inode * inode);
extern void iget_failed(struct inode *);
extern void clear_inode(struct inode *);
+extern void end_writeback(struct inode *);
extern void destroy_inode(struct inode *);
extern void __destroy_inode(struct inode *);
extern struct inode *new_inode(struct super_block *);
--
1.5.6.5
--
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