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Tue, 30 Jun 2026 10:33:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1782815639; bh=Gsl3tPUdzUJBW9EALbXP0CQ+gdTQn4E8pzPSD9/4upk=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=F+zXCaY5S4Ob1UllqUKHQ5eO6fIGVBOcOHk/A04DaLnNWPdqoUSiVZFTVE9Tuu+58 6zefI/15iK7W5WQGDL3b9kYNcVOo6bFhmLAyr5ouDGjwPzJ3zPD0YoT3/nEGAIm5Vx 6hbOC9zXmnWXjzrIU7FaU3hNeF220G3NPy8QovDFU9loPN3El6UiUf2pd098bM6DFG nlVN6m65S0okuyJtB0/b86tDd/9k2vTkbhsWnVGYsVckvuev7fnfpPdakop9K+Gi4j cpjsrnNH5lVmf/H/5LLrH5eDgT0AhmVlLlMrnVAoLk+Pv2lkeYSmzwiM7dohq0LBVc FHJt8/HE/HrjQ== Message-ID: Date: Tue, 30 Jun 2026 12:33:55 +0200 X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 3/3] selftests/mm: fix ternary operator precedence in ksm_tests To: Sayali Patil , Andrew Morton , Shuah Khan , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Ritesh Harjani Cc: Zi Yan , Michal Hocko , Oscar Salvador , Lorenzo Stoakes , Dev Jain , Liam.Howlett@oracle.com, linuxppc-dev@lists.ozlabs.org, Miaohe Lin , Venkat Rao Bagalkote References: From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 6/30/26 11:32, Sayali Patil wrote: > 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. > > Fixes: 9aa1af954db0 ("selftests: vm: check numa_available() before operating "merge_across_nodes" in ksm_tests") > Signed-off-by: Sayali Patil > --- LGTM, although the code is a bit ugly (already before your changes). Acked-by: David Hildenbrand (Arm) -- Cheers, David