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| author | David Hildenbrand <david@redhat.com> | 2022-11-16 11:26:43 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-12-01 00:58:57 +0100 |
| commit | cdc5021cda194112bc0962d6a0e90b379968c504 (patch) | |
| tree | 12c5231ee46f8a17f2b12d6c80a021c866d2723b /crypto/sha1_generic.c | |
| parent | selftests/vm: cow: R/O long-term pinning reliability tests for non-anon pages (diff) | |
| download | linux-cdc5021cda194112bc0962d6a0e90b379968c504.tar.xz linux-cdc5021cda194112bc0962d6a0e90b379968c504.zip | |
mm: add early FAULT_FLAG_UNSHARE consistency checks
For now, FAULT_FLAG_UNSHARE only applies to anonymous pages, which
implies a COW mapping. Let's hide FAULT_FLAG_UNSHARE early if we're not
dealing with a COW mapping, such that we treat it like a read fault as
documented and don't have to worry about the flag throughout all fault
handlers.
While at it, centralize the check for mutual exclusion of
FAULT_FLAG_UNSHARE and FAULT_FLAG_WRITE and just drop the check that
either flag is set in the WP handler.
Link: https://lkml.kernel.org/r/20221116102659.70287-5-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'crypto/sha1_generic.c')
0 files changed, 0 insertions, 0 deletions