[GFS2] Shrink gfs2_inode (8) - i_vn

This shrinks the size of the gfs2_inode by 8 bytes by
replacing the version counter with a one bit valid/invalid
flag.

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

1 files changed, 3 insertions, 2 deletions

diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c
index aad45b7a927d..9c2033714b08 100644
--- a/fs/gfs2/glops.c
+++ b/fs/gfs2/glops.c
@@ -305,8 +305,9 @@ static void inode_go_inval(struct gfs2_glock *gl, int flags)
         int data = (flags & DIO_DATA);
 
         if (meta) {
+                struct gfs2_inode *ip = gl->gl_object;
                 gfs2_meta_inval(gl);
-                gl->gl_vn++;
+                set_bit(GIF_INVALID, &ip->i_flags);
         }
         if (data)
                 gfs2_page_inval(gl);
@@ -351,7 +352,7 @@ static int inode_go_lock(struct gfs2_holder *gh)
         if (!ip)
                 return 0;
 
-        if (ip->i_vn != gl->gl_vn) {
+        if (test_bit(GIF_INVALID, &ip->i_flags)) {
                 error = gfs2_inode_refresh(ip);
                 if (error)
                         return error;