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b=LGaIyoO8QRryjQ9LLIYlo0Tj2q/DGPFidKNZu7x0kTeJ6YMfUAlZyBJuwnsHOzsLOY G7g5uICXAUiqHQWQLkUujURCTtj29Cu/nFON39ovH9SrLsH5HZDX5oPjpp0mX/b9u4NT zY8Et9TRV2ZpDeVEm8zPmD4euv9Xe2YEahLClCUlLEO2n0Uu03CjYelKiFMFufCeaapD 6O2Zom51C33kdl9F64rZy9WoTRYlPiXNIq9tMnvbpKFc4zWLDwizy5D2JeVLjiFMh4uS yo1ShRBSa4JtoH8FZcJKMPHR3FZ2oUZpJUx1tDvM674UPeQSVu6S9ZhXvBK6AehCq/NY ecXA== X-Gm-Message-State: AOJu0Yy2XTJclEzZH600ufzJWUcrk4mOMkWZvbfBZzD9qcMKMIb6asHK STw/MV3NrevPFXEhXiHvVcdMLx+LB8hyomzRmTIXFxEkUbB3A/f+hgjlx844XE0KfTZ0ZmFcIwX A+A== X-Google-Smtp-Source: AGHT+IHgBvu4/6UpOEaDnS659CK1Rn1/E5r8mTk00ZsUtMRUIXJafj8Ignnkw5WxXqtPYIrr50vXY4UIGHU= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:9d:3983:ac13:c240]) (user=seanjc job=sendgmr) by 2002:a17:902:ff02:b0:205:58ee:1567 with SMTP id d9443c01a7336-20c80362278mr43175ad.0.1728584692824; Thu, 10 Oct 2024 11:24:52 -0700 (PDT) Reply-To: Sean Christopherson Date: Thu, 10 Oct 2024 11:23:04 -0700 In-Reply-To: <20241010182427.1434605-1-seanjc@google.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20241010182427.1434605-1-seanjc@google.com> X-Mailer: git-send-email 2.47.0.rc1.288.g06298d1525-goog Message-ID: <20241010182427.1434605-3-seanjc@google.com> Subject: [PATCH v13 02/85] KVM: Allow calling kvm_release_page_{clean,dirty}() on a NULL page pointer From: Sean Christopherson To: Paolo Bonzini , Marc Zyngier , Oliver Upton , Tianrui Zhao , Bibo Mao , Huacai Chen , Michael Ellerman , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Christian Borntraeger , Janosch Frank , Claudio Imbrenda , Sean Christopherson Cc: kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, " =?utf-8?q?Alex_Benn=C3=A9e?= " , Yan Zhao , David Matlack , David Stevens , Andrew Jones Allow passing a NULL @page to kvm_release_page_{clean,dirty}(), there's no tangible benefit to forcing the callers to pre-check @page, and it ends up generating a lot of duplicate boilerplate code. Reviewed-by: Alex Bennée Tested-by: Alex Bennée Signed-off-by: Sean Christopherson --- virt/kvm/kvm_main.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 4b659a649dfa..2032292df0b0 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -3179,7 +3179,7 @@ static void kvm_set_page_accessed(struct page *page) void kvm_release_page_clean(struct page *page) { - if (WARN_ON(!page)) + if (!page) return; kvm_set_page_accessed(page); @@ -3204,7 +3204,7 @@ EXPORT_SYMBOL_GPL(kvm_release_pfn_clean); void kvm_release_page_dirty(struct page *page) { - if (WARN_ON(!page)) + if (!page) return; kvm_set_page_dirty(page);