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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=8Z9k7hZvEPmq++QcMDZiZsWcl46Vj1BocbQ0cOU/FNM=; b=rqGIReur4+qwTTOa9SHJ5CftC2nOKcgk8SNUlxL9AKoN8/yl03eWLDUyfec/53UArw HfXzz4K4QEHnhMl65gMyvt/7mS1lBy0f1vJdJaqscYq/uaSWMk4UDeTFemutGvINsqpC v4cc6YF//ddcWqVY+fWV9UTNSGLAq7QAROega23YN9UgLgF8/fO5HJjOQDO85GoKMszW R9ehPhL+JwTSGAFm/oruBLeC1nj6uazhSV6Iu+9dDmkmt8Ayk5UFAxV3vLqBGvbtmquD +LCRETQ4ogIRM8EbIhHSI7R6OhmpOilFcy30llyUfCXj9iW7fdXPAg4yfya70typLG12 jNXg== X-Gm-Message-State: AOAM533LP/XGi7W4eC6hzF6xUHyN2x073U7AWY4DvWV5qWY31QYDdDzd Yb9LBa1Sccj0uqyVRodQYuD13l4VH8dxEoFIL+Q= X-Google-Smtp-Source: ABdhPJz+7Css5KK1OpZUjZgXWLDi39JN/gWO7PRZZDMxz/EqUbcEpWKFi5QyByaFuSTBObLpkxNksopPJp16SrRkt4s= X-Received: from samitolvanen1.mtv.corp.google.com ([2620:15c:201:2:f693:9fff:fef4:1b6d]) (user=samitolvanen job=sendgmr) by 2002:a0c:e152:: with SMTP id c18mr18505590qvl.41.1600460102349; Fri, 18 Sep 2020 13:15:02 -0700 (PDT) Date: Fri, 18 Sep 2020 13:14:16 -0700 In-Reply-To: <20200918201436.2932360-1-samitolvanen@google.com> Message-Id: <20200918201436.2932360-11-samitolvanen@google.com> Mime-Version: 1.0 References: <20200918201436.2932360-1-samitolvanen@google.com> X-Mailer: git-send-email 2.28.0.681.g6f77f65b4e-goog Subject: [PATCH v3 10/30] treewide: remove DISABLE_LTO From: Sami Tolvanen To: Masahiro Yamada , Will Deacon X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200918_161507_266254_D655D46C X-CRM114-Status: GOOD ( 13.52 ) X-Spam-Score: -7.7 (-------) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-7.7 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:f4a listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -7.5 USER_IN_DEF_DKIM_WL From: address is in the default DKIM white-list 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.0 DKIMWL_WL_MED DKIMwl.org - Medium sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch@vger.kernel.org, x86@kernel.org, Kees Cook , "Paul E. McKenney" , kernel-hardening@lists.openwall.com, Peter Zijlstra , Greg Kroah-Hartman , linux-kbuild@vger.kernel.org, Nick Desaulniers , linux-kernel@vger.kernel.org, Steven Rostedt , clang-built-linux@googlegroups.com, Sami Tolvanen , linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org This change removes all instances of DISABLE_LTO from Makefiles, as they are currently unused, and the preferred method of disabling LTO is to filter out the flags instead. Suggested-by: Kees Cook Signed-off-by: Sami Tolvanen --- arch/arm64/kernel/vdso/Makefile | 1 - arch/sparc/vdso/Makefile | 2 -- arch/x86/entry/vdso/Makefile | 2 -- kernel/Makefile | 3 --- scripts/Makefile.build | 2 +- 5 files changed, 1 insertion(+), 9 deletions(-) diff --git a/arch/arm64/kernel/vdso/Makefile b/arch/arm64/kernel/vdso/Makefile index 45d5cfe46429..e836e300440f 100644 --- a/arch/arm64/kernel/vdso/Makefile +++ b/arch/arm64/kernel/vdso/Makefile @@ -31,7 +31,6 @@ ccflags-y := -fno-common -fno-builtin -fno-stack-protector -ffixed-x18 ccflags-y += -DDISABLE_BRANCH_PROFILING CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE) -Os $(CC_FLAGS_SCS) $(GCC_PLUGINS_CFLAGS) -KBUILD_CFLAGS += $(DISABLE_LTO) KASAN_SANITIZE := n UBSAN_SANITIZE := n OBJECT_FILES_NON_STANDARD := y diff --git a/arch/sparc/vdso/Makefile b/arch/sparc/vdso/Makefile index f44355e46f31..476c4b315505 100644 --- a/arch/sparc/vdso/Makefile +++ b/arch/sparc/vdso/Makefile @@ -3,8 +3,6 @@ # Building vDSO images for sparc. # -KBUILD_CFLAGS += $(DISABLE_LTO) - VDSO64-$(CONFIG_SPARC64) := y VDSOCOMPAT-$(CONFIG_COMPAT) := y diff --git a/arch/x86/entry/vdso/Makefile b/arch/x86/entry/vdso/Makefile index 215376d975a2..ecc27018ae13 100644 --- a/arch/x86/entry/vdso/Makefile +++ b/arch/x86/entry/vdso/Makefile @@ -9,8 +9,6 @@ ARCH_REL_TYPE_ABS := R_X86_64_JUMP_SLOT|R_X86_64_GLOB_DAT|R_X86_64_RELATIVE| ARCH_REL_TYPE_ABS += R_386_GLOB_DAT|R_386_JMP_SLOT|R_386_RELATIVE include $(srctree)/lib/vdso/Makefile -KBUILD_CFLAGS += $(DISABLE_LTO) - # Sanitizer runtimes are unavailable and cannot be linked here. KASAN_SANITIZE := n UBSAN_SANITIZE := n diff --git a/kernel/Makefile b/kernel/Makefile index 9a20016d4900..347254f07dab 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -38,9 +38,6 @@ KASAN_SANITIZE_kcov.o := n KCSAN_SANITIZE_kcov.o := n CFLAGS_kcov.o := $(call cc-option, -fno-conserve-stack) -fno-stack-protector -# cond_syscall is currently not LTO compatible -CFLAGS_sys_ni.o = $(DISABLE_LTO) - obj-y += sched/ obj-y += locking/ obj-y += power/ diff --git a/scripts/Makefile.build b/scripts/Makefile.build index 6ecf30c70ced..ed2b8ce9d4c2 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -111,7 +111,7 @@ endif # --------------------------------------------------------------------------- quiet_cmd_cc_s_c = CC $(quiet_modtag) $@ - cmd_cc_s_c = $(CC) $(filter-out $(DEBUG_CFLAGS), $(c_flags)) $(DISABLE_LTO) -fverbose-asm -S -o $@ $< + cmd_cc_s_c = $(CC) $(filter-out $(DEBUG_CFLAGS), $(c_flags)) -fverbose-asm -S -o $@ $< $(obj)/%.s: $(src)/%.c FORCE $(call if_changed_dep,cc_s_c)