[GFS2] Get rid of gl_waiters2

This patch reduces memory by replacing the int variable
gl_waiters2 by a single bit in the gl_flags.

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

1 files changed, 4 insertions, 3 deletions

diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index befcda0e53a1..951cb91e7ddb 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -595,11 +595,12 @@ static void run_queue(struct gfs2_glock *gl)
                         blocked = rq_mutex(gh);
                 } else if (test_bit(GLF_DEMOTE, &gl->gl_flags)) {
                         blocked = rq_demote(gl);
-                        if (gl->gl_waiters2 && !blocked) {
+                        if (test_bit(GLF_WAITERS2, &gl->gl_flags) &&
+                                     !blocked) {
                                 set_bit(GLF_DEMOTE, &gl->gl_flags);
                                 gl->gl_demote_state = LM_ST_UNLOCKED;
                         }
-                        gl->gl_waiters2 = 0;
+                        clear_bit(GLF_WAITERS2, &gl->gl_flags);
                 } else if (!list_empty(&gl->gl_waiters3)) {
                         gh = list_entry(gl->gl_waiters3.next,
                                         struct gfs2_holder, gh_list);
@@ -710,7 +711,7 @@ static void handle_callback(struct gfs2_glock *gl, unsigned int state,
         } else if (gl->gl_demote_state != LM_ST_UNLOCKED &&
                         gl->gl_demote_state != state) {
                 if (test_bit(GLF_DEMOTE_IN_PROGRESS,  &gl->gl_flags)) 
-                        gl->gl_waiters2 = 1;
+                        set_bit(GLF_WAITERS2, &gl->gl_flags);
                 else 
                         gl->gl_demote_state = LM_ST_UNLOCKED;
         }