mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-08-28 14:34:17 -04:00
4e1fbffb33
The KSM selftest uses conditional expressions to skip accesses to
merge_across_nodes on systems without NUMA support. However, the ternary
operator is combined with logical OR without parentheses:
a || numa_available() ? 0 : b || c
Due to operator precedence rules, this is parsed as:
(a || numa_available()) ? 0 : (b || c)
instead of the intended:
a || (numa_available() ? 0 : b) || c
Add parentheses around the conditional expressions to ensure the
correct evaluation order.
Link: https://lore.kernel.org/ce859430287ed2642848c933a90eb9a69da361f0.1783446924.git.sayalip@linux.ibm.com
Fixes: 9aa1af954d ("selftests: vm: check numa_available() before operating "merge_across_nodes" in ksm_tests")
Signed-off-by: Sayali Patil <sayalip@linux.ibm.com>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Liam Howlett <liam@infradead.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: "Ritesh Harjani (IBM)" <ritesh.list@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>