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([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.gmail.com with ESMTPSA id r17sm9231641edt.33.2021.05.24.06.25.26 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 24 May 2021 06:25:26 -0700 (PDT) Subject: Re: [PATCH v2 02/10] KVM: selftests: simplify setup_demand_paging error handling To: Axel Rasmussen , Ben Gardon Cc: Aaron Lewis , Alexander Graf , Andrew Jones , Andrew Morton , Emanuele Giuseppe Esposito , Eric Auger , Jacob Xu , Makarand Sonare , Oliver Upton , Peter Xu , Shuah Khan , Yanan Wang , kvm , LKML , linux-kselftest@vger.kernel.org References: <20210519200339.829146-1-axelrasmussen@google.com> <20210519200339.829146-3-axelrasmussen@google.com> From: Paolo Bonzini Message-ID: <824fe2de-a087-d2b4-406a-e8c6c040b37a@redhat.com> Date: Mon, 24 May 2021 15:25:25 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 20/05/21 00:14, Axel Rasmussen wrote: > On Wed, May 19, 2021 at 2:45 PM Ben Gardon wrote: >> >> On Wed, May 19, 2021 at 1:03 PM Axel Rasmussen wrote: >>> >>> A small cleanup. Our caller writes: >>> >>> r = setup_demand_paging(...); >>> if (r < 0) exit(-r); >>> >>> Since we're just going to exit anyway, instead of returning an error we >>> can just re-use TEST_ASSERT. This makes the caller simpler, as well as >>> the function itself - no need to write our branches, etc. >>> >>> Signed-off-by: Axel Rasmussen >>> --- >>> .../selftests/kvm/demand_paging_test.c | 51 +++++++------------ >>> 1 file changed, 19 insertions(+), 32 deletions(-) >>> >>> diff --git a/tools/testing/selftests/kvm/demand_paging_test.c b/tools/testing/selftests/kvm/demand_paging_test.c >>> index 9398ba6ef023..601a1df24dd2 100644 >>> --- a/tools/testing/selftests/kvm/demand_paging_test.c >>> +++ b/tools/testing/selftests/kvm/demand_paging_test.c >>> @@ -9,6 +9,8 @@ >>> >>> #define _GNU_SOURCE /* for pipe2 */ >>> >>> +#include >>> +#include >> >> Why do the includes need to change in this commit? Is it for the PRIu64 below? > > Right, I didn't actually try compiling without these, but inttypes.h > defines PRIu64 and stdint.h defines uint64_t. In general I tend to > prefer including things like this because we're using their > definitions directly, even if we might be picking them up transiently > some other way. inttypes.h is defined to include stdint.h (stdint.h is mostly useful in freestanding environments and is usually provided by the C compiler, while inttypes.h is provided by libc). Paolo