From e0b401e3fef0f81fd87434793db1adb0d7568058 Mon Sep 17 00:00:00 2001 From: Huaisheng Ye Date: Mon, 30 Jul 2018 15:15:46 +0800 Subject: [PATCH] dax/super: Do not request a pointer kaddr when not required Function __bdev_dax_supported doesn't need to get local pointer kaddr from direct_access. Using NULL instead of having to pass in a useless local pointer that caller then just throw away. Signed-off-by: Huaisheng Ye Reviewed-by: Ross Zwisler Signed-off-by: Dave Jiang --- drivers/dax/super.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/dax/super.c b/drivers/dax/super.c index 903d9c4..c2f42b1 100644 --- a/drivers/dax/super.c +++ b/drivers/dax/super.c @@ -88,7 +88,6 @@ bool __bdev_dax_supported(struct block_device *bdev, int blocksize) bool dax_enabled = false; pgoff_t pgoff; int err, id; - void *kaddr; pfn_t pfn; long len; char buf[BDEVNAME_SIZE]; @@ -114,7 +113,7 @@ bool __bdev_dax_supported(struct block_device *bdev, int blocksize) } id = dax_read_lock(); - len = dax_direct_access(dax_dev, pgoff, 1, &kaddr, &pfn); + len = dax_direct_access(dax_dev, pgoff, 1, NULL, &pfn); dax_read_unlock(id); put_dax(dax_dev); -- 2.7.4