linux-kernel - [PATCH] buildid: use kmap_local

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Message-Id: <20240306034804.62087-1-flyingpeng@tencent.com>
Date: Wed,  6 Mar 2024 11:48:04 +0800
From: flyingpenghao@...il.com
To: akpm@...ux-foundation.org
Cc: linux-kernel@...r.kernel.org,
	Peng Hao <flyingpeng@...cent.com>
Subject: [PATCH]  buildid: use kmap_local_page()

From: Peng Hao <flyingpeng@...cent.com>

From: Peng Hao <flyingpeng@...cent.com>

Use kmap_local_page() instead of kmap_atomic() which has been
deprecated.

Signed-off-by: Peng Hao <flyingpeng@...cent.com>
---
 lib/buildid.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/buildid.c b/lib/buildid.c
index e3a7acdeef0e..29fdfb4cccf0 100644
--- a/lib/buildid.c
+++ b/lib/buildid.c
@@ -140,7 +140,7 @@ int build_id_parse(struct vm_area_struct *vma, unsigned char *build_id,
 		return -EFAULT;	/* page not mapped */
 
 	ret = -EINVAL;
-	page_addr = kmap_atomic(page);
+	page_addr = kmap_local_page(page);
 	ehdr = (Elf32_Ehdr *)page_addr;
 
 	/* compare magic x7f "ELF" */
@@ -156,7 +156,7 @@ int build_id_parse(struct vm_area_struct *vma, unsigned char *build_id,
 	else if (ehdr->e_ident[EI_CLASS] == ELFCLASS64)
 		ret = get_build_id_64(page_addr, build_id, size);
 out:
-	kunmap_atomic(page_addr);
+	kunmap_local(page_addr);
 	put_page(page);
 	return ret;
 }
-- 
2.31.1