linux-kernel - [PATCH 1/4] mm: mempool: extract common initialization code

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Message-Id: <20221005180341.1738796-2-shy828301@gmail.com>
Date:   Wed,  5 Oct 2022 11:03:38 -0700
From:   Yang Shi <shy828301@...il.com>
To:     mgorman@...hsingularity.net, agk@...hat.com, snitzer@...nel.org,
        dm-devel@...hat.com, akpm@...ux-foundation.org
Cc:     linux-mm@...ck.org, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/4] mm: mempool: extract common initialization code

Extract the common initialization code to __mempool_init() and
__mempool_create().  This will make adding mempool bulk init
code easier.

Signed-off-by: Yang Shi <shy828301@...il.com>
---
 mm/mempool.c | 57 ++++++++++++++++++++++++++++++++++------------------
 1 file changed, 37 insertions(+), 20 deletions(-)

diff --git a/mm/mempool.c b/mm/mempool.c
index 96488b13a1ef..ba32151f3843 100644
--- a/mm/mempool.c
+++ b/mm/mempool.c
@@ -176,9 +176,10 @@ void mempool_destroy(mempool_t *pool)
 }
 EXPORT_SYMBOL(mempool_destroy);
 
-int mempool_init_node(mempool_t *pool, int min_nr, mempool_alloc_t *alloc_fn,
-		      mempool_free_t *free_fn, void *pool_data,
-		      gfp_t gfp_mask, int node_id)
+static inline int __mempool_init(mempool_t *pool, int min_nr,
+				 mempool_alloc_t *alloc_fn,
+				 mempool_free_t *free_fn, void *pool_data,
+				 gfp_t gfp_mask, int node_id)
 {
 	spin_lock_init(&pool->lock);
 	pool->min_nr	= min_nr;
@@ -208,6 +209,14 @@ int mempool_init_node(mempool_t *pool, int min_nr, mempool_alloc_t *alloc_fn,
 
 	return 0;
 }
+
+int mempool_init_node(mempool_t *pool, int min_nr, mempool_alloc_t *alloc_fn,
+		      mempool_free_t *free_fn, void *pool_data,
+		      gfp_t gfp_mask, int node_id)
+{
+	return __mempool_init(pool, min_nr, alloc_fn, free_fn, pool_data,
+			      gfp_mask, node_id);
+}
 EXPORT_SYMBOL(mempool_init_node);
 
 /**
@@ -227,12 +236,31 @@ EXPORT_SYMBOL(mempool_init_node);
 int mempool_init(mempool_t *pool, int min_nr, mempool_alloc_t *alloc_fn,
 		 mempool_free_t *free_fn, void *pool_data)
 {
-	return mempool_init_node(pool, min_nr, alloc_fn, free_fn,
-				 pool_data, GFP_KERNEL, NUMA_NO_NODE);
+	return __mempool_init(pool, min_nr, alloc_fn, free_fn,
+			      pool_data, GFP_KERNEL, NUMA_NO_NODE);
 
 }
 EXPORT_SYMBOL(mempool_init);
 
+static mempool_t *__mempool_create(int min_nr, mempool_alloc_t *alloc_fn,
+				   mempool_free_t *free_fn, void *pool_data,
+				   gfp_t gfp_mask, int node_id)
+{
+	mempool_t *pool;
+
+	pool = kzalloc_node(sizeof(*pool), gfp_mask, node_id);
+	if (!pool)
+		return NULL;
+
+	if (__mempool_init(pool, min_nr, alloc_fn, free_fn, pool_data,
+			   gfp_mask, node_id)) {
+		kfree(pool);
+		return NULL;
+	}
+
+	return pool;
+}
+
 /**
  * mempool_create - create a memory pool
  * @min_nr:    the minimum number of elements guaranteed to be
@@ -252,8 +280,8 @@ EXPORT_SYMBOL(mempool_init);
 mempool_t *mempool_create(int min_nr, mempool_alloc_t *alloc_fn,
 				mempool_free_t *free_fn, void *pool_data)
 {
-	return mempool_create_node(min_nr, alloc_fn, free_fn, pool_data,
-				   GFP_KERNEL, NUMA_NO_NODE);
+	return __mempool_create(min_nr, alloc_fn, free_fn, pool_data,
+				GFP_KERNEL, NUMA_NO_NODE);
 }
 EXPORT_SYMBOL(mempool_create);
 
@@ -261,19 +289,8 @@ mempool_t *mempool_create_node(int min_nr, mempool_alloc_t *alloc_fn,
 			       mempool_free_t *free_fn, void *pool_data,
 			       gfp_t gfp_mask, int node_id)
 {
-	mempool_t *pool;
-
-	pool = kzalloc_node(sizeof(*pool), gfp_mask, node_id);
-	if (!pool)
-		return NULL;
-
-	if (mempool_init_node(pool, min_nr, alloc_fn, free_fn, pool_data,
-			      gfp_mask, node_id)) {
-		kfree(pool);
-		return NULL;
-	}
-
-	return pool;
+	return __mempool_create(min_nr, alloc_fn, free_fn, pool_data,
+				gfp_mask, node_id);
 }
 EXPORT_SYMBOL(mempool_create_node);
 
-- 
2.26.3