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dm-pcache: remove unused 'allocated' variable in cache_data_alloc()

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The 'allocated' variable is never non-zero when its value is consumed.
'to_alloc' was always equal to key->len, so replace them with key->len
directly.

Signed-off-by: Jianyun Gao <jianyungao89@gmail.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
This commit is contained in:
Jianyun Gao 2026-07-17 16:38:56 +08:00 committed by Mikulas Patocka
parent 8765dcb96f
commit a46fd918f7
1 changed files with 2 additions and 5 deletions
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7
drivers/md/dm-pcache/cache_req.c
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@ -39,13 +39,11 @@ static int cache_data_alloc(struct pcache_cache *cache, struct pcache_cache_key
struct pcache_cache_pos *head_pos;
struct pcache_cache_segment *cache_seg;
u32 seg_remain;
u32 allocated = 0, to_alloc;
int ret = 0;
preempt_disable();
data_head = get_data_head(cache);
again:
to_alloc = key->len - allocated;
if (!data_head->head_pos.cache_seg) {
seg_remain = 0;
} else {
@ -57,10 +55,9 @@ static int cache_data_alloc(struct pcache_cache *cache, struct pcache_cache_key
seg_remain = cache_seg_remain(head_pos);
}
if (seg_remain > to_alloc) {
if (seg_remain > key->len) {
/* If remaining space in segment is sufficient for the cache key, allocate it. */
cache_pos_advance(head_pos, to_alloc);
allocated += to_alloc;
cache_pos_advance(head_pos, key->len);
cache_seg_get(cache_seg);
} else if (seg_remain) {
/* If remaining space is not enough, allocate the remaining space and adjust the cache key length. */