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path: root/drivers/md/raid5.c
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Diffstat (limited to 'drivers/md/raid5.c')
-rw-r--r--drivers/md/raid5.c34
1 files changed, 12 insertions, 22 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index dae740adaf65..31843604049c 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -73,10 +73,8 @@ static void print_raid5_conf (raid5_conf_t *conf);
73static void __release_stripe(raid5_conf_t *conf, struct stripe_head *sh) 73static void __release_stripe(raid5_conf_t *conf, struct stripe_head *sh)
74{ 74{
75 if (atomic_dec_and_test(&sh->count)) { 75 if (atomic_dec_and_test(&sh->count)) {
76 if (!list_empty(&sh->lru)) 76 BUG_ON(!list_empty(&sh->lru));
77 BUG(); 77 BUG_ON(atomic_read(&conf->active_stripes)==0);
78 if (atomic_read(&conf->active_stripes)==0)
79 BUG();
80 if (test_bit(STRIPE_HANDLE, &sh->state)) { 78 if (test_bit(STRIPE_HANDLE, &sh->state)) {
81 if (test_bit(STRIPE_DELAYED, &sh->state)) 79 if (test_bit(STRIPE_DELAYED, &sh->state))
82 list_add_tail(&sh->lru, &conf->delayed_list); 80 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
184 raid5_conf_t *conf = sh->raid_conf; 182 raid5_conf_t *conf = sh->raid_conf;
185 int i; 183 int i;
186 184
187 if (atomic_read(&sh->count) != 0) 185 BUG_ON(atomic_read(&sh->count) != 0);
188 BUG(); 186 BUG_ON(test_bit(STRIPE_HANDLE, &sh->state));
189 if (test_bit(STRIPE_HANDLE, &sh->state))
190 BUG();
191 187
192 CHECK_DEVLOCK(); 188 CHECK_DEVLOCK();
193 PRINTK("init_stripe called, stripe %llu\n", 189 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
269 init_stripe(sh, sector, pd_idx, disks); 265 init_stripe(sh, sector, pd_idx, disks);
270 } else { 266 } else {
271 if (atomic_read(&sh->count)) { 267 if (atomic_read(&sh->count)) {
272 if (!list_empty(&sh->lru)) 268 BUG_ON(!list_empty(&sh->lru));
273 BUG();
274 } else { 269 } else {
275 if (!test_bit(STRIPE_HANDLE, &sh->state)) 270 if (!test_bit(STRIPE_HANDLE, &sh->state))
276 atomic_inc(&conf->active_stripes); 271 atomic_inc(&conf->active_stripes);
@@ -465,8 +460,7 @@ static int drop_one_stripe(raid5_conf_t *conf)
465 spin_unlock_irq(&conf->device_lock); 460 spin_unlock_irq(&conf->device_lock);
466 if (!sh) 461 if (!sh)
467 return 0; 462 return 0;
468 if (atomic_read(&sh->count)) 463 BUG_ON(atomic_read(&sh->count));
469 BUG();
470 shrink_buffers(sh, conf->pool_size); 464 shrink_buffers(sh, conf->pool_size);
471 kmem_cache_free(conf->slab_cache, sh); 465 kmem_cache_free(conf->slab_cache, sh);
472 atomic_dec(&conf->active_stripes); 466 atomic_dec(&conf->active_stripes);
@@ -882,8 +876,7 @@ static void compute_parity(struct stripe_head *sh, int method)
882 ptr[0] = page_address(sh->dev[pd_idx].page); 876 ptr[0] = page_address(sh->dev[pd_idx].page);
883 switch(method) { 877 switch(method) {
884 case READ_MODIFY_WRITE: 878 case READ_MODIFY_WRITE:
885 if (!test_bit(R5_UPTODATE, &sh->dev[pd_idx].flags)) 879 BUG_ON(!test_bit(R5_UPTODATE, &sh->dev[pd_idx].flags));
886 BUG();
887 for (i=disks ; i-- ;) { 880 for (i=disks ; i-- ;) {
888 if (i==pd_idx) 881 if (i==pd_idx)
889 continue; 882 continue;
@@ -896,7 +889,7 @@ static void compute_parity(struct stripe_head *sh, int method)
896 if (test_and_clear_bit(R5_Overlap, &sh->dev[i].flags)) 889 if (test_and_clear_bit(R5_Overlap, &sh->dev[i].flags))
897 wake_up(&conf->wait_for_overlap); 890 wake_up(&conf->wait_for_overlap);
898 891
899 if (sh->dev[i].written) BUG(); 892 BUG_ON(sh->dev[i].written);
900 sh->dev[i].written = chosen; 893 sh->dev[i].written = chosen;
901 check_xor(); 894 check_xor();
902 } 895 }
@@ -912,7 +905,7 @@ static void compute_parity(struct stripe_head *sh, int method)
912 if (test_and_clear_bit(R5_Overlap, &sh->dev[i].flags)) 905 if (test_and_clear_bit(R5_Overlap, &sh->dev[i].flags))
913 wake_up(&conf->wait_for_overlap); 906 wake_up(&conf->wait_for_overlap);
914 907
915 if (sh->dev[i].written) BUG(); 908 BUG_ON(sh->dev[i].written);
916 sh->dev[i].written = chosen; 909 sh->dev[i].written = chosen;
917 } 910 }
918 break; 911 break;
@@ -995,8 +988,7 @@ static int add_stripe_bio(struct stripe_head *sh, struct bio *bi, int dd_idx, in
995 if (*bip && (*bip)->bi_sector < bi->bi_sector + ((bi->bi_size)>>9)) 988 if (*bip && (*bip)->bi_sector < bi->bi_sector + ((bi->bi_size)>>9))
996 goto overlap; 989 goto overlap;
997 990
998 if (*bip && bi->bi_next && (*bip) != bi->bi_next) 991 BUG_ON(*bip && bi->bi_next && (*bip) != bi->bi_next);
999 BUG();
1000 if (*bip) 992 if (*bip)
1001 bi->bi_next = *bip; 993 bi->bi_next = *bip;
1002 *bip = bi; 994 *bip = bi;
@@ -1430,8 +1422,7 @@ static void handle_stripe(struct stripe_head *sh)
1430 set_bit(STRIPE_HANDLE, &sh->state); 1422 set_bit(STRIPE_HANDLE, &sh->state);
1431 if (failed == 0) { 1423 if (failed == 0) {
1432 char *pagea; 1424 char *pagea;
1433 if (uptodate != disks) 1425 BUG_ON(uptodate != disks);
1434 BUG();
1435 compute_parity(sh, CHECK_PARITY); 1426 compute_parity(sh, CHECK_PARITY);
1436 uptodate--; 1427 uptodate--;
1437 pagea = page_address(sh->dev[sh->pd_idx].page); 1428 pagea = page_address(sh->dev[sh->pd_idx].page);
@@ -2096,8 +2087,7 @@ static void raid5d (mddev_t *mddev)
2096 2087
2097 list_del_init(first); 2088 list_del_init(first);
2098 atomic_inc(&sh->count); 2089 atomic_inc(&sh->count);
2099 if (atomic_read(&sh->count)!= 1) 2090 BUG_ON(atomic_read(&sh->count)!= 1);
2100 BUG();
2101 spin_unlock_irq(&conf->device_lock); 2091 spin_unlock_irq(&conf->device_lock);
2102 2092
2103 handled++; 2093 handled++;