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| author | Al Viro <viro@zeniv.linux.org.uk> | 2015-11-17 01:07:57 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-02-16 20:09:38 +0100 |
| commit | 076e4ab3279eb3ddb206de44d04df7aeb2428e09 (patch) | |
| tree | 9c68c20e8d2241455fb03c68868c1da639a15afb /fs/inode.c | |
| parent | 33813d43dd593e1c32c567c75483233212b825ae (diff) | |
| download | linux-stable-076e4ab3279eb3ddb206de44d04df7aeb2428e09.tar.gz linux-stable-076e4ab3279eb3ddb206de44d04df7aeb2428e09.tar.bz2 linux-stable-076e4ab3279eb3ddb206de44d04df7aeb2428e09.zip | |
don't put symlink bodies in pagecache into highmem
commit 21fc61c73c3903c4c312d0802da01ec2b323d174 upstream.
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>
Signed-off-by: Jin Qian <jinqian@google.com>
Signed-off-by: Jin Qian <jinqian@android.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/inode.c')
| -rw-r--r-- | fs/inode.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/inode.c b/fs/inode.c index b0edef500590..b95615f3fc50 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -2028,3 +2028,9 @@ void inode_set_flags(struct inode *inode, unsigned int flags, new_flags) != old_flags)); } EXPORT_SYMBOL(inode_set_flags); + +void inode_nohighmem(struct inode *inode) +{ + mapping_set_gfp_mask(inode->i_mapping, GFP_USER); +} +EXPORT_SYMBOL(inode_nohighmem); |