buildid: use kmap_local_page()

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

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Peng Hao <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: flying-122

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;
 }