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bcache: split combined if-condition code into separate ones 

Split the combined '||' statements in if() check, to make the code easier
for debug.

Signed-off-by: Dongbo Cao <cdbdyx@163.com>
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Dongbo Cao 2018-10-08 20:41:20 +08:00 committed by Jens Axboe
parent 8792099f9a
commit f6027bca9e
1 changed files with 76 additions and 14 deletions
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90
drivers/md/bcache/super.c
View File

@ -2052,6 +2052,8 @@ static int cache_alloc(struct cache *ca)
size_t free;
size_t btree_buckets;
struct bucket *b;
int ret = -ENOMEM;
const char *err = NULL;
__module_get(THIS_MODULE);
kobject_init(&ca->kobj, &bch_cache_ktype);
@ -2070,26 +2072,86 @@ static int cache_alloc(struct cache *ca)
btree_buckets = ca->sb.njournal_buckets ?: 8;
free = roundup_pow_of_two(ca->sb.nbuckets) >> 10;
if (!init_fifo(&ca->free[RESERVE_BTREE], btree_buckets, GFP_KERNEL) ||
!init_fifo_exact(&ca->free[RESERVE_PRIO], prio_buckets(ca), GFP_KERNEL) ||
!init_fifo(&ca->free[RESERVE_MOVINGGC], free, GFP_KERNEL) ||
!init_fifo(&ca->free[RESERVE_NONE], free, GFP_KERNEL) ||
!init_fifo(&ca->free_inc, free << 2, GFP_KERNEL) ||
!init_heap(&ca->heap, free << 3, GFP_KERNEL) ||
!(ca->buckets = vzalloc(array_size(sizeof(struct bucket),
ca->sb.nbuckets))) ||
!(ca->prio_buckets = kzalloc(array3_size(sizeof(uint64_t),
prio_buckets(ca), 2),
GFP_KERNEL)) ||
!(ca->disk_buckets = alloc_bucket_pages(GFP_KERNEL, ca)))
return -ENOMEM;
if (!init_fifo(&ca->free[RESERVE_BTREE], btree_buckets,
GFP_KERNEL)) {
err = "ca->free[RESERVE_BTREE] alloc failed";
goto err_btree_alloc;
}
if (!init_fifo_exact(&ca->free[RESERVE_PRIO], prio_buckets(ca),
GFP_KERNEL)) {
err = "ca->free[RESERVE_PRIO] alloc failed";
goto err_prio_alloc;
}
if (!init_fifo(&ca->free[RESERVE_MOVINGGC], free, GFP_KERNEL)) {
err = "ca->free[RESERVE_MOVINGGC] alloc failed";
goto err_movinggc_alloc;
}
if (!init_fifo(&ca->free[RESERVE_NONE], free, GFP_KERNEL)) {
err = "ca->free[RESERVE_NONE] alloc failed";
goto err_none_alloc;
}
if (!init_fifo(&ca->free_inc, free << 2, GFP_KERNEL)) {
err = "ca->free_inc alloc failed";
goto err_free_inc_alloc;
}
if (!init_heap(&ca->heap, free << 3, GFP_KERNEL)) {
err = "ca->heap alloc failed";
goto err_heap_alloc;
}
ca->buckets = vzalloc(array_size(sizeof(struct bucket),
ca->sb.nbuckets));
if (!ca->buckets) {
err = "ca->buckets alloc failed";
goto err_buckets_alloc;
}
ca->prio_buckets = kzalloc(array3_size(sizeof(uint64_t),
prio_buckets(ca), 2),
GFP_KERNEL);
if (!ca->prio_buckets) {
err = "ca->prio_buckets alloc failed";
goto err_prio_buckets_alloc;
}
ca->disk_buckets = alloc_bucket_pages(GFP_KERNEL, ca);
if (!ca->disk_buckets) {
err = "ca->disk_buckets alloc failed";
goto err_disk_buckets_alloc;
}
ca->prio_last_buckets = ca->prio_buckets + prio_buckets(ca);
for_each_bucket(b, ca)
atomic_set(&b->pin, 0);
return 0;
err_disk_buckets_alloc:
kfree(ca->prio_buckets);
err_prio_buckets_alloc:
vfree(ca->buckets);
err_buckets_alloc:
free_heap(&ca->heap);
err_heap_alloc:
free_fifo(&ca->free_inc);
err_free_inc_alloc:
free_fifo(&ca->free[RESERVE_NONE]);
err_none_alloc:
free_fifo(&ca->free[RESERVE_MOVINGGC]);
err_movinggc_alloc:
free_fifo(&ca->free[RESERVE_PRIO]);
err_prio_alloc:
free_fifo(&ca->free[RESERVE_BTREE]);
err_btree_alloc:
module_put(THIS_MODULE);
if (err)
pr_notice("error %s: %s", ca->cache_dev_name, err);
return ret;
}
static int register_cache(struct cache_sb *sb, struct page *sb_page,