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Date:   Wed, 14 Jun 2023 09:44:54 -0700
From:   Sumitra Sharma <sumitraartsy@gmail.com>
To:     Forest Bond <forest@alittletooquiet.net>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org
Cc:     Ira Weiny <ira.weiny@intel.com>, Fabio <fmdefrancesco@gmail.com>,
        Deepak R Varma <drv@mailo.com>,
        Sumitra Sharma <sumitraartsy@gmail.com>
Subject: [PATCH] drivers/target: Call page_address() on page acquired with
 GFP_KERNEL flag
Message-ID: <20230614164454.GA390511@sumitra.com>
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rd_allocate_sgl_table() acquires a page with alloc_pages(GFP_KERNEL, 0).
Pages allocated with GFP_KERNEL cannot come from Highmem. This is why
there is no need to call kmap() on them.

Therefore, use a plain page_address() on that page.

Signed-off-by: Sumitra Sharma <sumitraartsy@gmail.com>
---
 drivers/target/target_core_rd.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/target/target_core_rd.c b/drivers/target/target_core_rd.c
index 6648c1c90e19..d8ea6aff39a2 100644
--- a/drivers/target/target_core_rd.c
+++ b/drivers/target/target_core_rd.c
@@ -159,9 +159,8 @@ static int rd_allocate_sgl_table(struct rd_dev *rd_dev, struct rd_dev_sg_table *
 			sg_assign_page(&sg[j], pg);
 			sg[j].length = PAGE_SIZE;
 
-			p = kmap(pg);
+			p = page_address(pg);
 			memset(p, init_payload, PAGE_SIZE);
-			kunmap(pg);
 		}
 
 		page_offset += sg_per_table;
-- 
2.25.1