]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commitdiff
fs/coredump: use kmap_local_page()
authorIra Weiny <ira.weiny@intel.com>
Fri, 26 Feb 2021 01:22:22 +0000 (17:22 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 26 Feb 2021 17:41:05 +0000 (09:41 -0800)
In dump_user_range() there is no reason for the mapping to be global.  Use
kmap_local_page() rather than kmap.

Link: https://lkml.kernel.org/r/20210203223328.558945-1-ira.weiny@intel.com
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/coredump.c

index ae778937a1ffe673756dccf47e17ef58f4470cbd..1c0fdc1aa70b4a6db13d27f44ac6437f2e158e4f 100644 (file)
@@ -897,10 +897,10 @@ 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);