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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/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>
This commit is contained in:
Ira Weiny 2021-02-25 17:22:22 -08:00 • committed by Linus Torvalds
parent f9c8bc4604
commit 3159ed5779
1 changed files with 2 additions and 2 deletions
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4
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); page = get_dump_page(addr);
if (page) { if (page) {
void *kaddr = kmap(page); void *kaddr = kmap_local_page(page);
stop = !dump_emit(cprm, kaddr, PAGE_SIZE); stop = !dump_emit(cprm, kaddr, PAGE_SIZE);
kunmap(page); kunmap_local(kaddr);
put_page(page); put_page(page);
} else { } else {
stop = !dump_skip(cprm, PAGE_SIZE); stop = !dump_skip(cprm, PAGE_SIZE);