mem-pool: only search head block for available space

diff --git a/mem-pool.c b/mem-pool.c
index 389d7af447036ef58e64d2041a8c6743a862817a..c80124f1fe12a1f8fb9478048b12d1fa5fcda944 100644 (file)
--- a/mem-pool.c
+++ b/mem-pool.c
@@ -21,16 +21,16 @@ static struct mp_block *mem_pool_alloc_block(struct mem_pool *mem_pool, size_t b
 
 void *mem_pool_alloc(struct mem_pool *mem_pool, size_t len)
 {
-       struct mp_block *p;
+       struct mp_block *p = NULL;
        void *r;
 
        /* round up to a 'uintmax_t' alignment */
        if (len & (sizeof(uintmax_t) - 1))
                len += sizeof(uintmax_t) - (len & (sizeof(uintmax_t) - 1));
 
-       for (p = mem_pool->mp_block; p; p = p->next_block)
-               if (p->end - p->next_free >= len)
-                       break;
+       if (mem_pool->mp_block &&
+           mem_pool->mp_block->end - mem_pool->mp_block->next_free >= len)
+               p = mem_pool->mp_block;
 
        if (!p) {
                if (len >= (mem_pool->block_alloc / 2)) {