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authorAl Viro <viro@zeniv.linux.org.uk>2015-11-17 09:07:57 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2015-12-09 06:41:36 +0300
commit21fc61c73c3903c4c312d0802da01ec2b323d174 (patch)
treea26c29e3fbb766f00b023724e9e5b8b9bba9b879 /fs/jfs/inode.c
parentaa80deab33a8fb180e718f5e45514db19aade165 (diff)
downloadlinux-21fc61c73c3903c4c312d0802da01ec2b323d174.tar.xz
don't put symlink bodies in pagecache into highmem
kmap() in page_follow_link_light() needed to go - allowing to hold an arbitrary number of kmaps for long is a great way to deadlocking the system. new helper (inode_nohighmem(inode)) needs to be used for pagecache symlinks inodes; done for all in-tree cases. page_follow_link_light() instrumented to yell about anything missed. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/jfs/inode.c')
-rw-r--r--fs/jfs/inode.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/jfs/inode.c b/fs/jfs/inode.c
index 41aa3ca6a6a4..9d9bae63ae2a 100644
--- a/fs/jfs/inode.c
+++ b/fs/jfs/inode.c
@@ -60,6 +60,7 @@ struct inode *jfs_iget(struct super_block *sb, unsigned long ino)
} else if (S_ISLNK(inode->i_mode)) {
if (inode->i_size >= IDATASIZE) {
inode->i_op = &page_symlink_inode_operations;
+ inode_nohighmem(inode);
inode->i_mapping->a_ops = &jfs_aops;
} else {
inode->i_op = &jfs_fast_symlink_inode_operations;