diff --git a/mem-pool.c b/mem-pool.c
index b7d789823e..08039ed069 100644
--- a/mem-pool.c
+++ b/mem-pool.c
@@ -12,11 +12,13 @@
  * `insert_after`. If `insert_after` is NULL, then insert block at the
  * head of the linked list.
  */
-static struct mp_block *mem_pool_alloc_block(struct mem_pool *mem_pool, size_t block_alloc, struct mp_block *insert_after)
+static struct mp_block *mem_pool_alloc_block(struct mem_pool *pool,
+					     size_t block_alloc,
+					     struct mp_block *insert_after)
 {
 	struct mp_block *p;
 
-	mem_pool->pool_alloc += sizeof(struct mp_block) + block_alloc;
+	pool->pool_alloc += sizeof(struct mp_block) + block_alloc;
 	p = xmalloc(st_add(sizeof(struct mp_block), block_alloc));
 
 	p->next_free = (char *)p->space;
@@ -26,28 +28,28 @@ static struct mp_block *mem_pool_alloc_block(struct mem_pool *mem_pool, size_t b
 		p->next_block = insert_after->next_block;
 		insert_after->next_block = p;
 	} else {
-		p->next_block = mem_pool->mp_block;
-		mem_pool->mp_block = p;
+		p->next_block = pool->mp_block;
+		pool->mp_block = p;
 	}
 
 	return p;
 }
 
-void mem_pool_init(struct mem_pool *mem_pool, size_t initial_size)
+void mem_pool_init(struct mem_pool *pool, size_t initial_size)
 {
-	mem_pool->mp_block = NULL;
-	mem_pool->pool_alloc = 0;
-	mem_pool->block_alloc = BLOCK_GROWTH_SIZE;
+	pool->mp_block = NULL;
+	pool->pool_alloc = 0;
+	pool->block_alloc = BLOCK_GROWTH_SIZE;
 
 	if (initial_size > 0)
-		mem_pool_alloc_block(mem_pool, initial_size, NULL);
+		mem_pool_alloc_block(pool, initial_size, NULL);
 }
 
-void mem_pool_discard(struct mem_pool *mem_pool, int invalidate_memory)
+void mem_pool_discard(struct mem_pool *pool, int invalidate_memory)
 {
 	struct mp_block *block, *block_to_free;
 
-	block = mem_pool->mp_block;
+	block = pool->mp_block;
 	while (block)
 	{
 		block_to_free = block;
@@ -59,11 +61,11 @@ void mem_pool_discard(struct mem_pool *mem_pool, int invalidate_memory)
 		free(block_to_free);
 	}
 
-	mem_pool->mp_block = NULL;
-	mem_pool->pool_alloc = 0;
+	pool->mp_block = NULL;
+	pool->pool_alloc = 0;
 }
 
-void *mem_pool_alloc(struct mem_pool *mem_pool, size_t len)
+void *mem_pool_alloc(struct mem_pool *pool, size_t len)
 {
 	struct mp_block *p = NULL;
 	void *r;
@@ -72,15 +74,15 @@ void *mem_pool_alloc(struct mem_pool *mem_pool, size_t len)
 	if (len & (sizeof(uintmax_t) - 1))
 		len += sizeof(uintmax_t) - (len & (sizeof(uintmax_t) - 1));
 
-	if (mem_pool->mp_block &&
-	    mem_pool->mp_block->end - mem_pool->mp_block->next_free >= len)
-		p = mem_pool->mp_block;
+	if (pool->mp_block &&
+	    pool->mp_block->end - pool->mp_block->next_free >= len)
+		p = pool->mp_block;
 
 	if (!p) {
-		if (len >= (mem_pool->block_alloc / 2))
-			return mem_pool_alloc_block(mem_pool, len, mem_pool->mp_block);
+		if (len >= (pool->block_alloc / 2))
+			return mem_pool_alloc_block(pool, len, pool->mp_block);
 
-		p = mem_pool_alloc_block(mem_pool, mem_pool->block_alloc, NULL);
+		p = mem_pool_alloc_block(pool, pool->block_alloc, NULL);
 	}
 
 	r = p->next_free;
@@ -88,10 +90,10 @@ void *mem_pool_alloc(struct mem_pool *mem_pool, size_t len)
 	return r;
 }
 
-void *mem_pool_calloc(struct mem_pool *mem_pool, size_t count, size_t size)
+void *mem_pool_calloc(struct mem_pool *pool, size_t count, size_t size)
 {
 	size_t len = st_mult(count, size);
-	void *r = mem_pool_alloc(mem_pool, len);
+	void *r = mem_pool_alloc(pool, len);
 	memset(r, 0, len);
 	return r;
 }
@@ -119,12 +121,12 @@ char *mem_pool_xstrndup(struct mem_pool *pool, const char *str, size_t len)
 	return memcpy(ret, str, minlen);
 }
 
-int mem_pool_contains(struct mem_pool *mem_pool, void *mem)
+int mem_pool_contains(struct mem_pool *pool, void *mem)
 {
 	struct mp_block *p;
 
 	/* Check if memory is allocated in a block */
-	for (p = mem_pool->mp_block; p; p = p->next_block)
+	for (p = pool->mp_block; p; p = p->next_block)
 		if ((mem >= ((void *)p->space)) &&
 		    (mem < ((void *)p->end)))
 			return 1;
diff --git a/mem-pool.h b/mem-pool.h
index 30b7a8c03b..022b3097e9 100644
--- a/mem-pool.h
+++ b/mem-pool.h
@@ -24,12 +24,12 @@ struct mem_pool {
 /*
  * Initialize mem_pool with specified initial size.
  */
-void mem_pool_init(struct mem_pool *mem_pool, size_t initial_size);
+void mem_pool_init(struct mem_pool *pool, size_t initial_size);
 
 /*
  * Discard all the memory the memory pool is responsible for.
  */
-void mem_pool_discard(struct mem_pool *mem_pool, int invalidate_memory);
+void mem_pool_discard(struct mem_pool *pool, int invalidate_memory);
 
 /*
  * Alloc memory from the mem_pool.
@@ -58,6 +58,6 @@ void mem_pool_combine(struct mem_pool *dst, struct mem_pool *src);
  * Check if a memory pointed at by 'mem' is part of the range of
  * memory managed by the specified mem_pool.
  */
-int mem_pool_contains(struct mem_pool *mem_pool, void *mem);
+int mem_pool_contains(struct mem_pool *pool, void *mem);
 
 #endif
