[PATCH] fs/coredump: Use kmap_local_page()

[ira . weiny]

From: Ira Weiny <ira.weiny@xxxxxxxxx>

In dump_user_range() there is no reason for the mapping to be global.
Use kmap_local_page() rather than kmap.

Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: linux-fsdevel@xxxxxxxxxxxxxxx
Signed-off-by: Ira Weiny <ira.weiny@xxxxxxxxx>
---
 fs/coredump.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/coredump.c b/fs/coredump.c
index a2f6ecc8e345..53f63e176a2a 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -894,10 +894,10 @@ int dump_user_range(struct coredump_params *cprm, unsigned long start,
 		 */
 		page = get_dump_page(addr);
 		if (page) {
-			void *kaddr = kmap(page);
+			void *kaddr = kmap_local_page(page);
 
 			stop = !dump_emit(cprm, kaddr, PAGE_SIZE);
-			kunmap(page);
+			kunmap_local(kaddr);
 			put_page(page);
 		} else {
 			stop = !dump_skip(cprm, PAGE_SIZE);
-- 
2.28.0.rc0.12.gb6a658bd00c9