linux-kernel - [PATCH] shmem: use list_for_each_entry_safe in shmem

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Date:	Thu,  3 Dec 2015 22:22:07 +0800
From:	Geliang Tang <geliangtang@....com>
To:	Hugh Dickins <hughd@...gle.com>
Cc:	Geliang Tang <geliangtang@....com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] shmem: use list_for_each_entry_safe in shmem_unuse

Simplify the code with list_for_each_entry_safe().

Signed-off-by: Geliang Tang <geliangtang@....com>
---
 mm/shmem.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/mm/shmem.c b/mm/shmem.c
index 9b05111..816685f 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -793,8 +793,7 @@ static int shmem_unuse_inode(struct shmem_inode_info *info,
  */
 int shmem_unuse(swp_entry_t swap, struct page *page)
 {
-	struct list_head *this, *next;
-	struct shmem_inode_info *info;
+	struct shmem_inode_info *info, *next;
 	struct mem_cgroup *memcg;
 	int error = 0;
 
@@ -818,8 +817,7 @@ int shmem_unuse(swp_entry_t swap, struct page *page)
 	error = -EAGAIN;
 
 	mutex_lock(&shmem_swaplist_mutex);
-	list_for_each_safe(this, next, &shmem_swaplist) {
-		info = list_entry(this, struct shmem_inode_info, swaplist);
+	list_for_each_entry_safe(info, next, &shmem_swaplist, swaplist) {
 		if (info->swapped)
 			error = shmem_unuse_inode(info, swap, &page);
 		else
-- 
2.5.0


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