Messages in this thread Patch in this message | | | From | ira.weiny@intel ... | Subject | [PATCH] fs/coredump: Use kmap_local_page() | Date | Wed, 3 Feb 2021 14:33:28 -0800 |
| |
From: Ira Weiny <ira.weiny@intel.com>
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@linux-foundation.org> Cc: linux-kernel@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org Signed-off-by: Ira Weiny <ira.weiny@intel.com> --- 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
| |