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[195.150.55.226]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-bddc61de4c4sm737796466b.42.2026.05.28.07.11.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 28 May 2026 07:11:23 -0700 (PDT) From: Piotr Zarycki To: seanjc@google.com, pbonzini@redhat.com Cc: shuah@kernel.org, dmatlack@google.com, vkuznets@redhat.com, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Piotr Zarycki Subject: [PATCH v2] KVM: selftests: hyperv_tlb_flush: use swap() to swap PTEs Date: Thu, 28 May 2026 16:10:59 +0200 Message-ID: <20260528141059.3337431-1-piotr.zarycki@gmail.com> X-Mailer: git-send-email 2.54.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Replace the open-coded swap with the swap() macro. Signed-off-by: Piotr Zarycki --- tools/include/linux/kernel.h | 4 ++++ tools/testing/selftests/kvm/x86/hyperv_tlb_flush.c | 6 +----- 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/tools/include/linux/kernel.h b/tools/include/linux/kernel.h index c8c18d3908a9..381e457960dc 100644 --- a/tools/include/linux/kernel.h +++ b/tools/include/linux/kernel.h @@ -46,6 +46,10 @@ #define min_t(type, x, y) min((type)x, (type)y) #define clamp(val, lo, hi) min((typeof(val))max(val, lo), hi) =20 +#ifndef swap +#define swap(a, b) do { typeof(a) __tmp =3D (a); (a) =3D (b); (b) =3D __t= mp; } while (0) +#endif + #ifndef BUG_ON #ifdef NDEBUG #define BUG_ON(cond) do { if (cond) {} } while (0) diff --git a/tools/testing/selftests/kvm/x86/hyperv_tlb_flush.c b/tools/tes= ting/selftests/kvm/x86/hyperv_tlb_flush.c index 15ee8b7bfc11..514d41f00714 100644 --- a/tools/testing/selftests/kvm/x86/hyperv_tlb_flush.c +++ b/tools/testing/selftests/kvm/x86/hyperv_tlb_flush.c @@ -131,14 +131,10 @@ static void set_expected_val(void *addr, u64 val, int= vcpu_id) =20 /* * Update PTEs swapping two test pages. - * TODO: use swap()/xchg() when these are provided. */ static void swap_two_test_pages(gpa_t pte_gva1, gpa_t pte_gva2) { - u64 tmp =3D *(u64 *)pte_gva1; - - *(u64 *)pte_gva1 =3D *(u64 *)pte_gva2; - *(u64 *)pte_gva2 =3D tmp; + swap(*(u64 *)pte_gva1, *(u64 *)pte_gva2); } =20 /* --=20 2.54.0