[PATCH] fs-verity: use kmap_local_page() instead of kmap()

[Eric Biggers <ebiggers@kernel.org>]

From: Eric Biggers <ebiggers@google.com>

Convert the use of kmap() to its recommended replacement
kmap_local_page().  This avoids the overhead of doing a non-local
mapping, which is unnecessary in this case.

Signed-off-by: Eric Biggers <ebiggers@google.com>
---
 fs/verity/read_metadata.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/verity/read_metadata.c b/fs/verity/read_metadata.c
index 6ee849dc7bc183..2aefc5565152ad 100644
--- a/fs/verity/read_metadata.c
+++ b/fs/verity/read_metadata.c
@@ -53,14 +53,14 @@ static int fsverity_read_merkle_tree(struct inode *inode,
 			break;
 		}
 
-		virt = kmap(page);
+		virt = kmap_local_page(page);
 		if (copy_to_user(buf, virt + offs_in_page, bytes_to_copy)) {
-			kunmap(page);
+			kunmap_local(virt);
 			put_page(page);
 			err = -EFAULT;
 			break;
 		}
-		kunmap(page);
+		kunmap_local(virt);
 		put_page(page);
 
 		retval += bytes_to_copy;

base-commit: 568035b01cfb107af8d2e4bd2fb9aea22cf5b868
prerequisite-patch-id: 188e114bdf3546eb18e7984b70be8a7c773acec3
-- 
2.37.1