mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-09-10 15:49:01 -04:00
7e8983f317
The original version of mremap_test (7df666253f: "kselftests: vm: add mremap tests") validated remapped contents byte-by-byte and printed a mismatch index in case the bytes streams didn't match. That was rather inefficient, especially also if the test passed. Later, commit7033c6cc96("selftests/mm: mremap_test: optimize execution time from minutes to seconds using chunkwise memcmp") used memcmp() on bigger chunks, to fallback to byte-wise scanning to detect the problematic index only if it discovered a problem. However, the implementation is overly complicated (e.g., get_sqrt() is currently not optimal) and we don't really have to report the exact index: whoever debugs the failing test can figure that out. Let's simplify by just comparing both byte streams with memcmp() and not detecting the exact failed index. Link: https://lore.kernel.org/20260415044509.579428-1-dev.jain@arm.com Signed-off-by: Dev Jain <dev.jain@arm.com> Reported-by: Sarthak Sharma <sarthak.sharma@arm.com> Tested-by: Sarthak Sharma <sarthak.sharma@arm.com> Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org> Acked-by: David Hildenbrand (Arm) <david@kernel.org> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Liam Howlett <liam@infradead.org> Cc: Lorenzo Stoakes <ljs@kernel.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Ryan Roberts <ryan.roberts@arm.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@kernel.org> Cc: David Laight <david.laight.linux@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>