fs-verity: use kmap_local_page() instead of kmap()

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 <[email protected]> Reviewed-by: Fabio M. De Francesco <[email protected]> Link: https://lore.kernel.org/r/[email protected]
majek · Aug 19, 2022 · 8377e8a · 8377e8a
1 parent c987918
commit 8377e8a
Showing 1 changed file with 3 additions and 3 deletions.
diff --git 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;