[GFS2] Use mutices rather than semaphores

As well as a number of minor bug fixes, this patch changes GFS
to use mutices rather than semaphores. This results in better
information in case there are any locking problems.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

fs/gfs2/glock.c

@@ -149,7 +149,7 @@ int gfs2_glock_put(struct gfs2_glock *gl)
 	struct gfs2_gl_hash_bucket *bucket = gl->gl_bucket;
 	int rv = 0;
 
-	down(&sdp->sd_invalidate_inodes_mutex);
+	mutex_lock(&sdp->sd_invalidate_inodes_mutex);
 
 	write_lock(&bucket->hb_lock);
 	if (kref_put(&gl->gl_ref, kill_glock)) {
@@ -161,7 +161,7 @@ int gfs2_glock_put(struct gfs2_glock *gl)
 	}
 	write_unlock(&bucket->hb_lock);
  out:
-	up(&sdp->sd_invalidate_inodes_mutex);
+	mutex_unlock(&sdp->sd_invalidate_inodes_mutex);
 	return rv;
 }
 
@@ -2312,9 +2312,9 @@ void gfs2_gl_hash_clear(struct gfs2_sbd *sdp, int wait)
 		   invalidate_inodes_mutex prevents glock_put()'s during
 		   an invalidate_inodes() */
 
-		down(&sdp->sd_invalidate_inodes_mutex);
+		mutex_lock(&sdp->sd_invalidate_inodes_mutex);
 		invalidate_inodes(sdp->sd_vfs);
-		up(&sdp->sd_invalidate_inodes_mutex);
+		mutex_unlock(&sdp->sd_invalidate_inodes_mutex);
 		yield();
 	}
 }

fs/gfs2/incore.h

@@ -88,7 +88,7 @@ struct gfs2_rgrpd {
 	uint64_t rd_rg_vn;
 	struct gfs2_bitmap *rd_bits;
 	unsigned int rd_bh_count;
-	struct semaphore rd_mutex;
+	struct mutex rd_mutex;
 	uint32_t rd_free_clone;
 	struct gfs2_log_element rd_le;
 	uint32_t rd_last_alloc_data;
@@ -277,7 +277,7 @@ enum {
 struct gfs2_file {
 	unsigned long f_flags;		/* GFF_... */
 
-	struct semaphore f_fl_mutex;
+	struct mutex f_fl_mutex;
 	struct gfs2_holder f_fl_gh;
 
 	struct gfs2_inode *f_inode;
@@ -510,7 +510,7 @@ struct gfs2_sbd {
 	struct gfs2_holder sd_live_gh;
 	struct gfs2_glock *sd_rename_gl;
 	struct gfs2_glock *sd_trans_gl;
-	struct semaphore sd_invalidate_inodes_mutex;
+	struct mutex sd_invalidate_inodes_mutex;
 
 	/* Inode Stuff */
 
@@ -528,12 +528,12 @@ struct gfs2_sbd {
 
 	/* Inum stuff */
 
-	struct semaphore sd_inum_mutex;
+	struct mutex sd_inum_mutex;
 
 	/* StatFS stuff */
 
 	spinlock_t sd_statfs_spin;
-	struct semaphore sd_statfs_mutex;
+	struct mutex sd_statfs_mutex;
 	struct gfs2_statfs_change sd_statfs_master;
 	struct gfs2_statfs_change sd_statfs_local;
 	unsigned long sd_statfs_sync_time;
@@ -542,7 +542,7 @@ struct gfs2_sbd {
 
 	uint64_t sd_rindex_vn;
 	spinlock_t sd_rindex_spin;
-	struct semaphore sd_rindex_mutex;
+	struct mutex sd_rindex_mutex;
 	struct list_head sd_rindex_list;
 	struct list_head sd_rindex_mru_list;
 	struct list_head sd_rindex_recent_list;
@@ -553,7 +553,7 @@ struct gfs2_sbd {
 
 	struct list_head sd_jindex_list;
 	spinlock_t sd_jindex_spin;
-	struct semaphore sd_jindex_mutex;
+	struct mutex sd_jindex_mutex;
 	unsigned int sd_journals;
 	unsigned long sd_jindex_refresh_time;
 
@@ -581,7 +581,7 @@ struct gfs2_sbd {
 	struct list_head sd_unlinked_list;
 	atomic_t sd_unlinked_count;
 	spinlock_t sd_unlinked_spin;
-	struct semaphore sd_unlinked_mutex;
+	struct mutex sd_unlinked_mutex;
 
 	unsigned int sd_unlinked_slots;
 	unsigned int sd_unlinked_chunks;
@@ -592,7 +592,7 @@ struct gfs2_sbd {
 	struct list_head sd_quota_list;
 	atomic_t sd_quota_count;
 	spinlock_t sd_quota_spin;
-	struct semaphore sd_quota_mutex;
+	struct mutex sd_quota_mutex;
 
 	unsigned int sd_quota_slots;
 	unsigned int sd_quota_chunks;
@@ -637,7 +637,7 @@ struct gfs2_sbd {
 	int sd_log_idle;
 
 	unsigned long sd_log_flush_time;
-	struct semaphore sd_log_flush_lock;
+	struct mutex sd_log_flush_lock;
 	struct list_head sd_log_flush_list;
 
 	unsigned int sd_log_flush_head;
@@ -659,7 +659,7 @@ struct gfs2_sbd {
 	/* For quiescing the filesystem */
 
 	struct gfs2_holder sd_freeze_gh;
-	struct semaphore sd_freeze_lock;
+	struct mutex sd_freeze_lock;
 	unsigned int sd_freeze_count;
 
 	/* Counters */

fs/gfs2/inode.c

@@ -782,11 +782,11 @@ static int pick_formal_ino_1(struct gfs2_sbd *sdp, uint64_t *formal_ino)
 	error = gfs2_trans_begin(sdp, RES_DINODE, 0);
 	if (error)
 		return error;
-	down(&sdp->sd_inum_mutex);
+	mutex_lock(&sdp->sd_inum_mutex);
 
 	error = gfs2_meta_inode_buffer(ip, &bh);
 	if (error) {
-		up(&sdp->sd_inum_mutex);
+		mutex_unlock(&sdp->sd_inum_mutex);
 		gfs2_trans_end(sdp);
 		return error;
 	}
@@ -800,14 +800,14 @@ static int pick_formal_ino_1(struct gfs2_sbd *sdp, uint64_t *formal_ino)
 		gfs2_inum_range_out(&ir,
 				    bh->b_data + sizeof(struct gfs2_dinode));
 		brelse(bh);
-		up(&sdp->sd_inum_mutex);
+		mutex_unlock(&sdp->sd_inum_mutex);
 		gfs2_trans_end(sdp);
 		return 0;
 	}
 
 	brelse(bh);
 
-	up(&sdp->sd_inum_mutex);
+	mutex_unlock(&sdp->sd_inum_mutex);
 	gfs2_trans_end(sdp);
 
 	return 1;
@@ -829,7 +829,7 @@ static int pick_formal_ino_2(struct gfs2_sbd *sdp, uint64_t *formal_ino)
 	error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0);
 	if (error)
 		goto out;
-	down(&sdp->sd_inum_mutex);
+	mutex_lock(&sdp->sd_inum_mutex);
 
 	error = gfs2_meta_inode_buffer(ip, &bh);
 	if (error)
@@ -869,7 +869,7 @@ static int pick_formal_ino_2(struct gfs2_sbd *sdp, uint64_t *formal_ino)
 	brelse(bh);
 
  out_end_trans:
-	up(&sdp->sd_inum_mutex);
+	mutex_unlock(&sdp->sd_inum_mutex);
 	gfs2_trans_end(sdp);
 
  out:

fs/gfs2/log.c

@@ -23,29 +23,16 @@
 
 #define PULL 1
 
-static inline int is_done(struct gfs2_sbd *sdp, atomic_t *a)
-{
-	int done;
-	gfs2_log_lock(sdp);
-	done = atomic_read(a) ? 0 : 1;
-	gfs2_log_unlock(sdp);
-	return done;
-}
-
 static void do_lock_wait(struct gfs2_sbd *sdp, wait_queue_head_t *wq,
 			 atomic_t *a)
 {
-	gfs2_log_unlock(sdp);
-	wait_event(*wq, is_done(sdp, a));
-	gfs2_log_lock(sdp);
+	wait_event(*wq, atomic_read(a) ? 0 : 1);
 }
 
 static void lock_for_trans(struct gfs2_sbd *sdp)
 {
-	gfs2_log_lock(sdp);
 	do_lock_wait(sdp, &sdp->sd_log_trans_wq, &sdp->sd_log_flush_count);
 	atomic_inc(&sdp->sd_log_trans_count);
-	gfs2_log_unlock(sdp);
 }
 
 static void unlock_from_trans(struct gfs2_sbd *sdp)
@@ -55,15 +42,13 @@ static void unlock_from_trans(struct gfs2_sbd *sdp)
 		wake_up(&sdp->sd_log_flush_wq);
 }
 
-void gfs2_lock_for_flush(struct gfs2_sbd *sdp)
+static void gfs2_lock_for_flush(struct gfs2_sbd *sdp)
 {
-	gfs2_log_lock(sdp);
 	atomic_inc(&sdp->sd_log_flush_count);
 	do_lock_wait(sdp, &sdp->sd_log_flush_wq, &sdp->sd_log_trans_count);
-	gfs2_log_unlock(sdp);
 }
 
-void gfs2_unlock_from_flush(struct gfs2_sbd *sdp)
+static void gfs2_unlock_from_flush(struct gfs2_sbd *sdp)
 {
 	gfs2_assert_warn(sdp, atomic_read(&sdp->sd_log_flush_count));
 	if (atomic_dec_and_test(&sdp->sd_log_flush_count))
@@ -209,7 +194,6 @@ int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks)
 
 	for (;;) {
 		gfs2_log_lock(sdp);
-
 		if (list_empty(&list)) {
 			list_add_tail(&list, &sdp->sd_log_blks_list);
 			while (sdp->sd_log_blks_list.next != &list) {
@@ -225,7 +209,6 @@ int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks)
 				set_current_state(TASK_RUNNING);
 			}
 		}
-
 		/* Never give away the last block so we can
 		   always pull the tail if we need to. */
 		if (sdp->sd_log_blks_free > blks) {
@@ -237,14 +220,12 @@ int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks)
 		}
 
 		gfs2_log_unlock(sdp);
-
 		gfs2_ail1_empty(sdp, 0);
 		gfs2_log_flush(sdp);
 
 		if (try++)
 			gfs2_ail1_start(sdp, 0);
 	}
-
 	lock_for_trans(sdp);
 
 	return 0;
@@ -512,22 +493,26 @@ void gfs2_log_flush_i(struct gfs2_sbd *sdp, struct gfs2_glock *gl)
 	ai = kzalloc(sizeof(struct gfs2_ail), GFP_NOFS | __GFP_NOFAIL);
 	INIT_LIST_HEAD(&ai->ai_ail1_list);
 	INIT_LIST_HEAD(&ai->ai_ail2_list);
-
 	gfs2_lock_for_flush(sdp);
-	down(&sdp->sd_log_flush_lock);
+
+	if (gl) {
+		gfs2_log_lock(sdp);
+		if (list_empty(&gl->gl_le.le_list)) {
+			gfs2_log_unlock(sdp);
+			gfs2_unlock_from_flush(sdp);
+			kfree(ai);
+			return;
+		}
+		gfs2_log_unlock(sdp);
+	}
+
+	mutex_lock(&sdp->sd_log_flush_lock);
 
 	gfs2_assert_withdraw(sdp,
 			sdp->sd_log_num_buf == sdp->sd_log_commited_buf);
 	gfs2_assert_withdraw(sdp,
 			sdp->sd_log_num_revoke == sdp->sd_log_commited_revoke);
 
-	if (gl && list_empty(&gl->gl_le.le_list)) {
-		up(&sdp->sd_log_flush_lock);
-		gfs2_unlock_from_flush(sdp);
-		kfree(ai);
-		return;
-	}
-
 	sdp->sd_log_flush_head = sdp->sd_log_head;
 	sdp->sd_log_flush_wrapped = 0;
 	ai->ai_first = sdp->sd_log_flush_head;
@@ -538,7 +523,6 @@ void gfs2_log_flush_i(struct gfs2_sbd *sdp, struct gfs2_glock *gl)
 	else if (sdp->sd_log_tail != current_tail(sdp) && !sdp->sd_log_idle)
 		log_write_header(sdp, 0, PULL);
 	lops_after_commit(sdp, ai);
-
 	sdp->sd_log_head = sdp->sd_log_flush_head;
 	if (sdp->sd_log_flush_wrapped)
 		sdp->sd_log_wraps++;
@@ -554,7 +538,7 @@ void gfs2_log_flush_i(struct gfs2_sbd *sdp, struct gfs2_glock *gl)
 	}
 	gfs2_log_unlock(sdp);
 
-	up(&sdp->sd_log_flush_lock);
+	mutex_unlock(&sdp->sd_log_flush_lock);
 	sdp->sd_vfs->s_dirt = 0;
 	gfs2_unlock_from_flush(sdp);
 
@@ -627,7 +611,7 @@ void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
 
 void gfs2_log_shutdown(struct gfs2_sbd *sdp)
 {
-	down(&sdp->sd_log_flush_lock);
+	mutex_lock(&sdp->sd_log_flush_lock);
 
 	gfs2_assert_withdraw(sdp, !atomic_read(&sdp->sd_log_trans_count));
 	gfs2_assert_withdraw(sdp, !sdp->sd_log_blks_reserved);
@@ -654,6 +638,6 @@ void gfs2_log_shutdown(struct gfs2_sbd *sdp)
 		sdp->sd_log_wraps++;
 	sdp->sd_log_tail = sdp->sd_log_head;
 
-	up(&sdp->sd_log_flush_lock);
+	mutex_unlock(&sdp->sd_log_flush_lock);
 }
 

fs/gfs2/log.h

@@ -42,9 +42,6 @@ static inline void gfs2_log_pointers_init(struct gfs2_sbd *sdp,
 	sdp->sd_log_head = sdp->sd_log_tail = value;
 }
 
-void gfs2_lock_for_flush(struct gfs2_sbd *sdp);
-void gfs2_unlock_from_flush(struct gfs2_sbd *sdp);
-
 unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct,
 			    unsigned int ssize);
 

fs/gfs2/lops.c

@@ -502,7 +502,8 @@ static void databuf_lo_before_commit(struct gfs2_sbd *sdp)
 	unsigned int total_dbuf = sdp->sd_log_num_databuf;
 	unsigned int total_jdata = sdp->sd_log_num_jdata;
 	unsigned int num, n;
-	__be64 *ptr;
+	__be64 *ptr = NULL;
+	unsigned i;
 
 	offset += (2*sizeof(__be64) - 1);
 	offset &= ~(2*sizeof(__be64) - 1);
@@ -513,14 +514,17 @@ static void databuf_lo_before_commit(struct gfs2_sbd *sdp)
 	 * Start writing ordered buffers, write journaled buffers
 	 * into the log along with a header
 	 */
+	gfs2_log_lock(sdp);
+	/* printk(KERN_INFO "locked in lops databuf_before_commit\n"); */
 	bd2 = bd1 = list_prepare_entry(bd1, &sdp->sd_log_le_databuf, bd_le.le_list);
 	while(total_dbuf) {
 		num = total_jdata;
 		if (num > limit)
 			num = limit;
+		/* printk(KERN_INFO "total_dbuf=%u num=%u\n", total_dbuf, num); */
 		n = 0;
+		i = 0;
 		list_for_each_entry_safe_continue(bd1, bdt, &sdp->sd_log_le_databuf, bd_le.le_list) {
-			gfs2_log_lock(sdp);
 			/* An ordered write buffer */
 			if (bd1->bd_bh && !buffer_pinned(bd1->bd_bh)) {
 				list_move(&bd1->bd_le.le_list, &started);
@@ -531,20 +535,28 @@ static void databuf_lo_before_commit(struct gfs2_sbd *sdp)
 				total_dbuf--;
 				if (bd1->bd_bh) {
 					get_bh(bd1->bd_bh);
-					gfs2_log_unlock(sdp);
 					if (buffer_dirty(bd1->bd_bh)) {
+						gfs2_log_unlock(sdp);
 						wait_on_buffer(bd1->bd_bh);
 						ll_rw_block(WRITE, 1, &bd1->bd_bh);
+						gfs2_log_lock(sdp);
 					}
 					brelse(bd1->bd_bh);
+					/* printk(KERN_INFO "db write %p\n", bd1); */
+					if (++i > 100000) {
+						printk(KERN_INFO "looping bd1=%p bdt=%p eol=%p started=%p\n", bd1, bdt, &sdp->sd_log_le_databuf, &started);
+						dump_stack();
+						BUG();
+					}
 					continue;
 				}
-				gfs2_log_unlock(sdp);
+				/* printk(KERN_INFO "db skip\n"); */
 				continue;
 			} else if (bd1->bd_bh) { /* A journaled buffer */
 				int magic;
 				gfs2_log_unlock(sdp);
-				/* printk(KERN_INFO "journaled buffer\n"); */
+				printk(KERN_INFO "journaled buffer %p\n", bd1->bd_bh);
+				printk(KERN_INFO "%lu %u %p %p\n", bd1->bd_bh->b_blocknr, bd1->bd_bh->b_size, bd1->bd_bh->b_data, bd1->bd_bh->b_page);  
 				if (!bh) {
 					bh = gfs2_log_get_buf(sdp);
 					ld = (struct gfs2_log_descriptor *)bh->b_data;
@@ -558,16 +570,21 @@ static void databuf_lo_before_commit(struct gfs2_sbd *sdp)
 					ld->ld_data2 = cpu_to_be32(0);
 					memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved));
 				}
+				/* printk(KERN_INFO "check_magic\n"); */
 				magic = gfs2_check_magic(bd1->bd_bh);
+				/* printk(KERN_INFO "write data\n"); */
 				*ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr);
 				*ptr++ = cpu_to_be64((__u64)magic);
+				/* printk(KERN_INFO "mark escaped or not\n"); */
 				clear_buffer_escaped(bd1->bd_bh);
 				if (unlikely(magic != 0))
 					set_buffer_escaped(bd1->bd_bh);
+				gfs2_log_lock(sdp);
 				if (n++ > num)
 					break;
 			}
 		}
+		gfs2_log_unlock(sdp);
 		if (bh) {
 			set_buffer_dirty(bh);
 			ll_rw_block(WRITE, 1, &bh);
@@ -575,10 +592,12 @@ static void databuf_lo_before_commit(struct gfs2_sbd *sdp)
 		}
 		n = 0;
 		/* printk(KERN_INFO "totals2: jdata=%u dbuf=%u\n", total_jdata, total_dbuf); */
+		gfs2_log_lock(sdp);
 		list_for_each_entry_continue(bd2, &sdp->sd_log_le_databuf, bd_le.le_list) {
 			if (!bd2->bd_bh)
 				continue;
 			/* copy buffer if it needs escaping */
+			gfs2_log_unlock(sdp);
 			if (unlikely(buffer_escaped(bd2->bd_bh))) {
 				void *kaddr;
 				struct page *page = bd2->bd_bh->b_page;
@@ -592,6 +611,7 @@ static void databuf_lo_before_commit(struct gfs2_sbd *sdp)
 			}
 			set_buffer_dirty(bh);
 			ll_rw_block(WRITE, 1, &bh);
+			gfs2_log_lock(sdp);
 			if (++n >= num)
 				break;
 		}
@@ -599,6 +619,8 @@ static void databuf_lo_before_commit(struct gfs2_sbd *sdp)
 		total_dbuf -= num;
 		total_jdata -= num;
 	}
+	gfs2_log_unlock(sdp);
+
 	/* printk(KERN_INFO "wait on ordered data buffers\n"); */
 	/* Wait on all ordered buffers */
 	while (!list_empty(&started)) {
@@ -701,12 +723,10 @@ static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
 
 	while (!list_empty(head)) {
 		bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list);
-		list_del_init(&bd->bd_le.le_list);
+		list_del(&bd->bd_le.le_list);
 		sdp->sd_log_num_databuf--;
 		sdp->sd_log_num_jdata--;
 		gfs2_unpin(sdp, bd->bd_bh, ai);
-		brelse(bd->bd_bh);
-		kfree(bd);
 	}
 	gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf);
 	gfs2_assert_warn(sdp, !sdp->sd_log_num_jdata);

fs/gfs2/meta_io.c

@@ -556,7 +556,7 @@ void gfs2_attach_bufdata(struct gfs2_glock *gl, struct buffer_head *bh, int meta
 		return;
 	}
 
-	bd = kmem_cache_alloc(gfs2_bufdata_cachep, GFP_KERNEL | __GFP_NOFAIL),
+	bd = kmem_cache_alloc(gfs2_bufdata_cachep, GFP_NOFS | __GFP_NOFAIL),
 	atomic_inc(&gl->gl_sbd->sd_bufdata_count);
 
 	memset(bd, 0, sizeof(struct gfs2_bufdata));

fs/gfs2/ops_address.c

@@ -189,7 +189,6 @@ static int gfs2_writepage(struct page *page, struct writeback_control *wbc)
 		gfs2_page_add_databufs(ip, page, 0, sdp->sd_vfs->s_blocksize-1);
 		done_trans = 1;
 	}
-
 	error = block_write_full_page(page, get_block_noalloc, wbc);
 	if (done_trans)
 		gfs2_trans_end(sdp);

fs/gfs2/ops_file.c

@@ -688,7 +688,7 @@ static int gfs2_open(struct inode *inode, struct file *file)
 	if (!fp)
 		return -ENOMEM;
 
-	init_MUTEX(&fp->f_fl_mutex);
+	mutex_init(&fp->f_fl_mutex);
 
 	fp->f_inode = ip;
 	fp->f_vfile = file;
@@ -858,7 +858,7 @@ static int do_flock(struct file *file, int cmd, struct file_lock *fl)
 	state = (fl->fl_type == F_WRLCK) ? LM_ST_EXCLUSIVE : LM_ST_SHARED;
 	flags = ((IS_SETLKW(cmd)) ? 0 : LM_FLAG_TRY) | GL_EXACT | GL_NOCACHE;
 
-	down(&fp->f_fl_mutex);
+	mutex_lock(&fp->f_fl_mutex);
 
 	gl = fl_gh->gh_gl;
 	if (gl) {
@@ -890,7 +890,7 @@ static int do_flock(struct file *file, int cmd, struct file_lock *fl)
 	}
 
  out:
-	up(&fp->f_fl_mutex);
+	mutex_unlock(&fp->f_fl_mutex);
 
 	return error;
 }
@@ -900,11 +900,11 @@ static void do_unflock(struct file *file, struct file_lock *fl)
 	struct gfs2_file *fp = get_v2fp(file);
 	struct gfs2_holder *fl_gh = &fp->f_fl_gh;
 
-	down(&fp->f_fl_mutex);
+	mutex_lock(&fp->f_fl_mutex);
 	flock_lock_file_wait(file, fl);
 	if (fl_gh->gh_gl)
 		gfs2_glock_dq_uninit(fl_gh);
-	up(&fp->f_fl_mutex);
+	mutex_unlock(&fp->f_fl_mutex);
 }
 
 /**

fs/gfs2/ops_fstype.c

@@ -59,29 +59,29 @@ static struct gfs2_sbd *init_sbd(struct super_block *sb)
 	INIT_LIST_HEAD(&sdp->sd_reclaim_list);
 	spin_lock_init(&sdp->sd_reclaim_lock);
 	init_waitqueue_head(&sdp->sd_reclaim_wq);
-	init_MUTEX(&sdp->sd_invalidate_inodes_mutex);
+	mutex_init(&sdp->sd_invalidate_inodes_mutex);
 
-	init_MUTEX(&sdp->sd_inum_mutex);
+	mutex_init(&sdp->sd_inum_mutex);
 	spin_lock_init(&sdp->sd_statfs_spin);
-	init_MUTEX(&sdp->sd_statfs_mutex);
+	mutex_init(&sdp->sd_statfs_mutex);
 
 	spin_lock_init(&sdp->sd_rindex_spin);
-	init_MUTEX(&sdp->sd_rindex_mutex);
+	mutex_init(&sdp->sd_rindex_mutex);
 	INIT_LIST_HEAD(&sdp->sd_rindex_list);
 	INIT_LIST_HEAD(&sdp->sd_rindex_mru_list);
 	INIT_LIST_HEAD(&sdp->sd_rindex_recent_list);
 
 	INIT_LIST_HEAD(&sdp->sd_jindex_list);
 	spin_lock_init(&sdp->sd_jindex_spin);
-	init_MUTEX(&sdp->sd_jindex_mutex);
+	mutex_init(&sdp->sd_jindex_mutex);
 
 	INIT_LIST_HEAD(&sdp->sd_unlinked_list);
 	spin_lock_init(&sdp->sd_unlinked_spin);
-	init_MUTEX(&sdp->sd_unlinked_mutex);
+	mutex_init(&sdp->sd_unlinked_mutex);
 
 	INIT_LIST_HEAD(&sdp->sd_quota_list);
 	spin_lock_init(&sdp->sd_quota_spin);
-	init_MUTEX(&sdp->sd_quota_mutex);
+	mutex_init(&sdp->sd_quota_mutex);
 
 	spin_lock_init(&sdp->sd_log_lock);
 	init_waitqueue_head(&sdp->sd_log_trans_wq);
@@ -99,12 +99,12 @@ static struct gfs2_sbd *init_sbd(struct super_block *sb)
 	INIT_LIST_HEAD(&sdp->sd_ail1_list);
 	INIT_LIST_HEAD(&sdp->sd_ail2_list);
 
-	init_MUTEX(&sdp->sd_log_flush_lock);
+	mutex_init(&sdp->sd_log_flush_lock);
 	INIT_LIST_HEAD(&sdp->sd_log_flush_list);
 
 	INIT_LIST_HEAD(&sdp->sd_revoke_list);
 
-	init_MUTEX(&sdp->sd_freeze_lock);
+	mutex_init(&sdp->sd_freeze_lock);
 
 	return sdp;
 }

fs/gfs2/ops_super.c

@@ -74,10 +74,10 @@ static void gfs2_put_super(struct super_block *sb)
 
 	/*  Unfreeze the filesystem, if we need to  */
 
-	down(&sdp->sd_freeze_lock);
+	mutex_lock(&sdp->sd_freeze_lock);
 	if (sdp->sd_freeze_count)
 		gfs2_glock_dq_uninit(&sdp->sd_freeze_gh);
-	up(&sdp->sd_freeze_lock);
+	mutex_unlock(&sdp->sd_freeze_lock);
 
 	kthread_stop(sdp->sd_inoded_process);
 	kthread_stop(sdp->sd_quotad_process);

fs/gfs2/quota.c

@@ -251,10 +251,10 @@ static int bh_get(struct gfs2_quota_data *qd)
 	struct buffer_head *bh;
 	int error;
 
-	down(&sdp->sd_quota_mutex);
+	mutex_lock(&sdp->sd_quota_mutex);
 
 	if (qd->qd_bh_count++) {
-		up(&sdp->sd_quota_mutex);
+		mutex_unlock(&sdp->sd_quota_mutex);
 		return 0;
 	}
 
@@ -276,7 +276,7 @@ static int bh_get(struct gfs2_quota_data *qd)
 		(bh->b_data + sizeof(struct gfs2_meta_header) +
 		 offset * sizeof(struct gfs2_quota_change));
 
-	up(&sdp->sd_quota_mutex);
+	mutex_lock(&sdp->sd_quota_mutex);
 
 	return 0;
 
@@ -285,7 +285,7 @@ static int bh_get(struct gfs2_quota_data *qd)
 
  fail:
 	qd->qd_bh_count--;
-	up(&sdp->sd_quota_mutex);
+	mutex_unlock(&sdp->sd_quota_mutex);
 	return error;
 }
 
@@ -293,14 +293,14 @@ static void bh_put(struct gfs2_quota_data *qd)
 {
 	struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
 
-	down(&sdp->sd_quota_mutex);
+	mutex_lock(&sdp->sd_quota_mutex);
 	gfs2_assert(sdp, qd->qd_bh_count);
 	if (!--qd->qd_bh_count) {
 		brelse(qd->qd_bh);
 		qd->qd_bh = NULL;
 		qd->qd_bh_qc = NULL;
 	}
-	up(&sdp->sd_quota_mutex);
+	mutex_unlock(&sdp->sd_quota_mutex);
 }
 
 static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp)
@@ -529,7 +529,7 @@ static void do_qc(struct gfs2_quota_data *qd, int64_t change)
 	struct gfs2_quota_change *qc = qd->qd_bh_qc;
 	int64_t x;
 
-	down(&sdp->sd_quota_mutex);
+	mutex_lock(&sdp->sd_quota_mutex);
 	gfs2_trans_add_bh(ip->i_gl, qd->qd_bh, 1);
 
 	if (!test_bit(QDF_CHANGE, &qd->qd_flags)) {
@@ -560,7 +560,7 @@ static void do_qc(struct gfs2_quota_data *qd, int64_t change)
 		slot_hold(qd);
 	}
 			
-	up(&sdp->sd_quota_mutex);
+	mutex_unlock(&sdp->sd_quota_mutex);
 }
 
 /**

fs/gfs2/rgrp.c

@@ -182,9 +182,9 @@ static void clear_rgrpdi(struct gfs2_sbd *sdp)
 
 void gfs2_clear_rgrpd(struct gfs2_sbd *sdp)
 {
-	down(&sdp->sd_rindex_mutex);
+	mutex_lock(&sdp->sd_rindex_mutex);
 	clear_rgrpdi(sdp);
-	up(&sdp->sd_rindex_mutex);
+	mutex_unlock(&sdp->sd_rindex_mutex);
 }
 
 /**
@@ -301,7 +301,7 @@ static int gfs2_ri_update(struct gfs2_inode *ip)
 		if (!rgd)
 			goto fail;
 
-		init_MUTEX(&rgd->rd_mutex);
+		mutex_init(&rgd->rd_mutex);
 		lops_init_le(&rgd->rd_le, &gfs2_rg_lops);
 		rgd->rd_sbd = sdp;
 
@@ -363,13 +363,13 @@ int gfs2_rindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ri_gh)
 
 	/* Read new copy from disk if we don't have the latest */
 	if (sdp->sd_rindex_vn != gl->gl_vn) {
-		down(&sdp->sd_rindex_mutex);
+		mutex_lock(&sdp->sd_rindex_mutex);
 		if (sdp->sd_rindex_vn != gl->gl_vn) {
 			error = gfs2_ri_update(ip);
 			if (error)
 				gfs2_glock_dq_uninit(ri_gh);
 		}
-		up(&sdp->sd_rindex_mutex);
+		mutex_unlock(&sdp->sd_rindex_mutex);
 	}
 
 	return error;
@@ -394,13 +394,13 @@ int gfs2_rgrp_bh_get(struct gfs2_rgrpd *rgd)
 	unsigned int x, y;
 	int error;
 
-	down(&rgd->rd_mutex);
+	mutex_lock(&rgd->rd_mutex);
 
 	spin_lock(&sdp->sd_rindex_spin);
 	if (rgd->rd_bh_count) {
 		rgd->rd_bh_count++;
 		spin_unlock(&sdp->sd_rindex_spin);
-		up(&rgd->rd_mutex);
+		mutex_unlock(&rgd->rd_mutex);
 		return 0;
 	}
 	spin_unlock(&sdp->sd_rindex_spin);
@@ -436,7 +436,7 @@ int gfs2_rgrp_bh_get(struct gfs2_rgrpd *rgd)
 	rgd->rd_bh_count++;
 	spin_unlock(&sdp->sd_rindex_spin);
 
-	up(&rgd->rd_mutex);
+	mutex_unlock(&rgd->rd_mutex);
 
 	return 0;
 
@@ -447,7 +447,7 @@ int gfs2_rgrp_bh_get(struct gfs2_rgrpd *rgd)
 		bi->bi_bh = NULL;
 		gfs2_assert_warn(sdp, !bi->bi_clone);
 	}
-	up(&rgd->rd_mutex);
+	mutex_unlock(&rgd->rd_mutex);
 
 	return error;
 }

fs/gfs2/super.c

@@ -279,7 +279,7 @@ int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh)
 
 	name.name = buf;
 
-	down(&sdp->sd_jindex_mutex);
+	mutex_lock(&sdp->sd_jindex_mutex);
 
 	for (;;) {
 		error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED,
@@ -317,7 +317,7 @@ int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh)
 		spin_unlock(&sdp->sd_jindex_spin);
 	}
 
-	up(&sdp->sd_jindex_mutex);
+	mutex_unlock(&sdp->sd_jindex_mutex);
 
 	return error;
 }
@@ -608,9 +608,9 @@ void gfs2_statfs_change(struct gfs2_sbd *sdp, int64_t total, int64_t free,
 	if (error)
 		return;
 
-	down(&sdp->sd_statfs_mutex);
+	mutex_lock(&sdp->sd_statfs_mutex);
 	gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1);
-	up(&sdp->sd_statfs_mutex);
+	mutex_unlock(&sdp->sd_statfs_mutex);
 
 	spin_lock(&sdp->sd_statfs_spin);
 	l_sc->sc_total += total;
@@ -659,9 +659,9 @@ int gfs2_statfs_sync(struct gfs2_sbd *sdp)
 	if (error)
 		goto out_bh2;
 
-	down(&sdp->sd_statfs_mutex);
+	mutex_lock(&sdp->sd_statfs_mutex);
 	gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1);
-	up(&sdp->sd_statfs_mutex);
+	mutex_unlock(&sdp->sd_statfs_mutex);
 
 	spin_lock(&sdp->sd_statfs_spin);
 	m_sc->sc_total += l_sc->sc_total;
@@ -910,7 +910,7 @@ int gfs2_freeze_fs(struct gfs2_sbd *sdp)
 {
 	int error = 0;
 
-	down(&sdp->sd_freeze_lock);
+	mutex_lock(&sdp->sd_freeze_lock);
 
 	if (!sdp->sd_freeze_count++) {
 		error = gfs2_lock_fs_check_clean(sdp, &sdp->sd_freeze_gh);
@@ -918,7 +918,7 @@ int gfs2_freeze_fs(struct gfs2_sbd *sdp)
 			sdp->sd_freeze_count--;
 	}
 
-	up(&sdp->sd_freeze_lock);
+	mutex_unlock(&sdp->sd_freeze_lock);
 
 	return error;
 }
@@ -935,11 +935,11 @@ int gfs2_freeze_fs(struct gfs2_sbd *sdp)
 
 void gfs2_unfreeze_fs(struct gfs2_sbd *sdp)
 {
-	down(&sdp->sd_freeze_lock);
+	mutex_lock(&sdp->sd_freeze_lock);
 
 	if (sdp->sd_freeze_count && !--sdp->sd_freeze_count)
 		gfs2_glock_dq_uninit(&sdp->sd_freeze_gh);
 
-	up(&sdp->sd_freeze_lock);
+	mutex_unlock(&sdp->sd_freeze_lock);
 }
 

fs/gfs2/sys.c

@@ -41,9 +41,9 @@ static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
 {
 	unsigned int count;
 
-	down(&sdp->sd_freeze_lock);
+	mutex_lock(&sdp->sd_freeze_lock);
 	count = sdp->sd_freeze_count;
-	up(&sdp->sd_freeze_lock);
+	mutex_unlock(&sdp->sd_freeze_lock);
 
 	return sprintf(buf, "%u\n", count);
 }

fs/gfs2/trans.c

@@ -33,7 +33,7 @@ int gfs2_trans_begin_i(struct gfs2_sbd *sdp, unsigned int blocks,
 		return -EINVAL;
 	}
 
-	tr = kzalloc(sizeof(struct gfs2_trans), GFP_KERNEL);
+	tr = kzalloc(sizeof(struct gfs2_trans), GFP_NOFS);
 	if (!tr)
 		return -ENOMEM;
 
@@ -51,7 +51,7 @@ int gfs2_trans_begin_i(struct gfs2_sbd *sdp, unsigned int blocks,
 
 	error = -ENOMEM;
 	tr->tr_t_gh = gfs2_holder_get(sdp->sd_trans_gl, LM_ST_SHARED,
-				      GL_NEVER_RECURSE, GFP_KERNEL);
+				      GL_NEVER_RECURSE, GFP_NOFS);
 	if (!tr->tr_t_gh)
 		goto fail;
 

fs/gfs2/unlinked.c

@@ -46,12 +46,12 @@ static int munge_ondisk(struct gfs2_sbd *sdp, unsigned int slot,
 		goto out;
 	}
 
-	down(&sdp->sd_unlinked_mutex);
+	mutex_lock(&sdp->sd_unlinked_mutex);
 	gfs2_trans_add_bh(ip->i_gl, bh, 1);
 	gfs2_unlinked_tag_out(ut, bh->b_data +
 				  sizeof(struct gfs2_meta_header) +
 				  offset * sizeof(struct gfs2_unlinked_tag));
-	up(&sdp->sd_unlinked_mutex);
+	mutex_unlock(&sdp->sd_unlinked_mutex);
 
  out:
 	brelse(bh);