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/coda/symlink.c b/fs/coda/symlink.c
index ab94ef6..03736e2 100644
--- a/fs/coda/symlink.c
+++ b/fs/coda/symlink.c
@@ -26,7 +26,7 @@
int error;
struct coda_inode_info *cii;
unsigned int len = PAGE_SIZE;
- char *p = kmap(page);
+ char *p = page_address(page);
cii = ITOC(inode);
@@ -34,13 +34,11 @@
if (error)
goto fail;
SetPageUptodate(page);
- kunmap(page);
unlock_page(page);
return 0;
fail:
SetPageError(page);
- kunmap(page);
unlock_page(page);
return error;
}