[GFS2] Fix a ref count bug and other clean ups

This fixes a ref count bug that sometimes showed up a umount time
(causing it to hang) but it otherwise mostly harmless. At the same
time there are some clean ups including making the log operations
structures const, moving a memory allocation so that its not done
in the fast path of checking to see if there is an outstanding
transaction related to a particular glock.

Removes the sd_log_wrap varaible which was updated, but never actually
used anywhere. Updates the gfs2 ioctl() to run without the kernel lock
(which it never needed anyway). Removes the "invalidate inodes" loop
from GFS2's put_super routine. This is done in kill super anyway so
we don't need to do it here. The loop was also bogus in that if there
are any inodes "stuck" at this point its a bug and we need to know
about it rather than hide it by hanging forever.

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

1 files changed, 3 insertions, 3 deletions

diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index 423cfa72b4c7..dfed83b37ab7 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -62,12 +62,12 @@ struct gfs2_log_operations {
 				 struct gfs2_log_descriptor *ld, __be64 *ptr,
 				 int pass);
 	void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
-	char *lo_name;
+	const char *lo_name;
 };
 
 struct gfs2_log_element {
 	struct list_head le_list;
-	struct gfs2_log_operations *le_ops;
+	const struct gfs2_log_operations *le_ops;
 };
 
 struct gfs2_bitmap {
@@ -618,6 +618,7 @@ struct gfs2_sbd {
 	unsigned int sd_log_num_rg;
 	unsigned int sd_log_num_databuf;
 	unsigned int sd_log_num_jdata;
+	unsigned int sd_log_num_hdrs;
 
 	struct list_head sd_log_le_gl;
 	struct list_head sd_log_le_buf;
@@ -631,7 +632,6 @@ struct gfs2_sbd {
 	uint64_t sd_log_sequence;
 	unsigned int sd_log_head;
 	unsigned int sd_log_tail;
-	uint64_t sd_log_wraps;
 	int sd_log_idle;
 
 	unsigned long sd_log_flush_time;