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[2003:f6:af46:5a00:bfa0:a096:5e5e:d85]) by smtp.gmail.com with ESMTPSA id u9-20020a05600c4d0900b003e1f2e43a1csm5393618wmp.48.2023.02.17.11.31.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 17 Feb 2023 11:31:19 -0800 (PST) From: Mathias Krause To: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Sean Christopherson , Paolo Bonzini , Mathias Krause Subject: [PATCH v2 1/2] KVM: x86: Shrink struct kvm_pmu Date: Fri, 17 Feb 2023 20:33:35 +0100 Message-Id: <20230217193336.15278-2-minipli@grsecurity.net> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230217193336.15278-1-minipli@grsecurity.net> References: <20230217193336.15278-1-minipli@grsecurity.net> MIME-Version: 1.0 X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1758108131938621574?= X-GMAIL-MSGID: =?utf-8?q?1758108131938621574?= Move the 'version' member to the beginning of the structure to reuse an existing hole instead of introducing another one. This allows us to save 8 bytes for 64 bit builds. Signed-off-by: Mathias Krause --- arch/x86/include/asm/kvm_host.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 6aaae18f1854..43329c60a6b5 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -516,6 +516,7 @@ struct kvm_pmc { #define KVM_PMC_MAX_FIXED 3 #define KVM_AMD_PMC_MAX_GENERIC 6 struct kvm_pmu { + u8 version; unsigned nr_arch_gp_counters; unsigned nr_arch_fixed_counters; unsigned available_event_types; @@ -528,7 +529,6 @@ struct kvm_pmu { u64 global_ovf_ctrl_mask; u64 reserved_bits; u64 raw_event_mask; - u8 version; struct kvm_pmc gp_counters[KVM_INTEL_PMC_MAX_GENERIC]; struct kvm_pmc fixed_counters[KVM_PMC_MAX_FIXED]; struct irq_work irq_work;