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Commit 78bafebd authored by Eric Sesterhenn's avatar Eric Sesterhenn Committed by Adrian Bunk
Browse files

BUG_ON() Conversion in md/raid5.c 



this changes if() BUG(); constructs to BUG_ON() which is
cleaner and can better optimized away

Signed-off-by: default avatarEric Sesterhenn <snakebyte@gmx.de>
Signed-off-by: default avatarAdrian Bunk <bunk@stusta.de>
parent 733f8969

drivers/md/raid5.c

+12 −22
Original line number Diff line number Diff line
@@ -73,10 +73,8 @@ static void print_raid5_conf (raid5_conf_t *conf); 
static void __release_stripe(raid5_conf_t *conf, struct stripe_head *sh)

{

	if (atomic_dec_and_test(&sh->count)) {

		if (!list_empty(&sh->lru))

			BUG();

		if (atomic_read(&conf->active_stripes)==0)

			BUG();

		BUG_ON(!list_empty(&sh->lru));

		BUG_ON(atomic_read(&conf->active_stripes)==0);

		if (test_bit(STRIPE_HANDLE, &sh->state)) {

			if (test_bit(STRIPE_DELAYED, &sh->state))

				list_add_tail(&sh->lru, &conf->delayed_list);
@@ -184,10 +182,8 @@ static void init_stripe(struct stripe_head *sh, sector_t sector, int pd_idx, int 
	raid5_conf_t *conf = sh->raid_conf;

	int i;



	if (atomic_read(&sh->count) != 0)

		BUG();

	if (test_bit(STRIPE_HANDLE, &sh->state))

		BUG();

	BUG_ON(atomic_read(&sh->count) != 0);

	BUG_ON(test_bit(STRIPE_HANDLE, &sh->state));

	

	CHECK_DEVLOCK();

	PRINTK("init_stripe called, stripe %llu\n",
@@ -269,8 +265,7 @@ static struct stripe_head *get_active_stripe(raid5_conf_t *conf, sector_t sector 
				init_stripe(sh, sector, pd_idx, disks);

		} else {

			if (atomic_read(&sh->count)) {

				if (!list_empty(&sh->lru))

					BUG();

			  BUG_ON(!list_empty(&sh->lru));

			} else {

				if (!test_bit(STRIPE_HANDLE, &sh->state))

					atomic_inc(&conf->active_stripes);
@@ -465,8 +460,7 @@ static int drop_one_stripe(raid5_conf_t *conf) 
	spin_unlock_irq(&conf->device_lock);

	if (!sh)

		return 0;

	if (atomic_read(&sh->count))

		BUG();

	BUG_ON(atomic_read(&sh->count));

	shrink_buffers(sh, conf->pool_size);

	kmem_cache_free(conf->slab_cache, sh);

	atomic_dec(&conf->active_stripes);
@@ -882,8 +876,7 @@ static void compute_parity(struct stripe_head *sh, int method) 
	ptr[0] = page_address(sh->dev[pd_idx].page);

	switch(method) {

	case READ_MODIFY_WRITE:

		if (!test_bit(R5_UPTODATE, &sh->dev[pd_idx].flags))

			BUG();

		BUG_ON(!test_bit(R5_UPTODATE, &sh->dev[pd_idx].flags));

		for (i=disks ; i-- ;) {

			if (i==pd_idx)

				continue;
@@ -896,7 +889,7 @@ static void compute_parity(struct stripe_head *sh, int method) 
				if (test_and_clear_bit(R5_Overlap, &sh->dev[i].flags))

					wake_up(&conf->wait_for_overlap);



				if (sh->dev[i].written) BUG();

				BUG_ON(sh->dev[i].written);

				sh->dev[i].written = chosen;

				check_xor();

			}
@@ -912,7 +905,7 @@ static void compute_parity(struct stripe_head *sh, int method) 
				if (test_and_clear_bit(R5_Overlap, &sh->dev[i].flags))

					wake_up(&conf->wait_for_overlap);



				if (sh->dev[i].written) BUG();

				BUG_ON(sh->dev[i].written);

				sh->dev[i].written = chosen;

			}

		break;
@@ -995,8 +988,7 @@ static int add_stripe_bio(struct stripe_head *sh, struct bio *bi, int dd_idx, in 
	if (*bip && (*bip)->bi_sector < bi->bi_sector + ((bi->bi_size)>>9))

		goto overlap;



	if (*bip && bi->bi_next && (*bip) != bi->bi_next)

		BUG();

	BUG_ON(*bip && bi->bi_next && (*bip) != bi->bi_next);

	if (*bip)

		bi->bi_next = *bip;

	*bip = bi;
@@ -1430,8 +1422,7 @@ static void handle_stripe(struct stripe_head *sh) 
		set_bit(STRIPE_HANDLE, &sh->state);

		if (failed == 0) {

			char *pagea;

			if (uptodate != disks)

				BUG();

			BUG_ON(uptodate != disks);

			compute_parity(sh, CHECK_PARITY);

			uptodate--;

			pagea = page_address(sh->dev[sh->pd_idx].page);
@@ -2096,8 +2087,7 @@ static void raid5d (mddev_t *mddev) 


		list_del_init(first);

		atomic_inc(&sh->count);

		if (atomic_read(&sh->count)!= 1)

			BUG();

		BUG_ON(atomic_read(&sh->count)!= 1);

		spin_unlock_irq(&conf->device_lock);

		

		handled++;