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fs/coredump: use kmap_local_page()

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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/[email protected]
Signed-off-by: Ira Weiny <[email protected]>
Cc: Alexander Viro <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Ira Weiny authored and Linus Torvalds committed 2021-02-26 09:41:05 -08:00
1 parent f9c8bc4604
commit 3159ed5779
1 file changed
+2 -2
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fs/coredump.c
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@@ -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);