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>
diff --git a/fs/nfs/symlink.c b/fs/nfs/symlink.c
index b6de433..abd93bf 100644
--- a/fs/nfs/symlink.c
+++ b/fs/nfs/symlink.c
@@ -56,7 +56,7 @@
if (IS_ERR(page))
return ERR_CAST(page);
*cookie = page;
- return kmap(page);
+ return page_address(page);
}
/*
