[GFS2] Use vmalloc() in dir code

When allocating memory to sort directory entries, use vmalloc()
rather than kmalloc() since for larger directories, the required
size can easily be graeter than the 128k maximum of kmalloc().

Also adding the first steps towards getting the AOP_TRUNCATED_PAGE
return code get in the glock code by flagging all places where we
request a glock and we are holding a page lock.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/gfs2/glock.h b/fs/gfs2/glock.h
index 560029de8d07..b6646e7fed15 100644
--- a/fs/gfs2/glock.h
+++ b/fs/gfs2/glock.h
@@ -27,6 +27,7 @@
 #define GL_SYNC                 0x00000800
 #define GL_NOCANCEL             0x00001000
 #define GL_NEVER_RECURSE        0x00002000
+#define GL_AOP                  0x00004000
 
 #define GLR_TRYFAILED           13
 #define GLR_CANCELED            14