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Mon, 28 Aug 2023 10:35:28 -0700 (PDT) Date: Mon, 28 Aug 2023 10:35:26 -0700 Mime-Version: 1.0 X-B4-Tracking: v=1; b=H4sIAN3a7GQC/x2MQQqAIBAAvyJ7TlCTlL4SEWFr7cVkjQikvycdB 2amQkEmLDCKCow3FTpTA90JCMeadpS0NQajTK+88TLnsDA2FfmSg3XWuKhsQA0tyYyRnn83ze/ 7AU72xYFeAAAA X-Developer-Key: i=ndesaulniers@google.com; a=ed25519; pk=eMOZeIQ4DYNKvsNmDNzVbQZqpdex34Aww3b8Ah957X4= X-Developer-Signature: v=1; a=ed25519-sha256; t=1693244127; l=1550; i=ndesaulniers@google.com; s=20230823; h=from:subject:message-id; bh=NZWt7Q1QVJ91SA9KKz/j+iZTrbry6bjB26P0pMnU6pg=; b=Lnj6TUFBIu7VQLLeAMH+ogFSMrSNMyHrSXXCmrtgK3wlnBjhUy65e3P0b8ELe49Ot/NrDh+ey mMP4H3R/vnDCbYmWUg1PYX7AhCj4SX0KW71DJ4i+pnvdz6PY03w3kZJ X-Mailer: b4 0.12.3 Message-ID: <20230828-ppc_rerevert-v1-1-74f55b818907@google.com> Subject: [PATCH] Revert "Revert "powerpc/xmon: Relax frame size for clang"" From: ndesaulniers@google.com To: Michael Ellerman Content-Type: text/plain; charset="utf-8" X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kernel test robot , Tom Rix , llvm@lists.linux.dev, Nick Desaulniers , linux-kernel@vger.kernel.org, Nathan Chancellor , Nicholas Piggin , linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" This reverts commit 7f3c5d099b6f8452dc4dcfe4179ea48e6a13d0eb. Turns out that this is reproducible still under specific compiler versions (mea culpa: I did not test every supported version of clang), and even a few randconfigs bots found. We'll have to revisit this again in the future, for now back this out. Reported-by: Nathan Chancellor Closes: https://github.com/ClangBuiltLinux/linux/issues/252#issuecomment-1690371256 Reported-by: kernel test robot Closes: https://lore.kernel.org/llvm/202308260344.Vc4Giuk7-lkp@intel.com/ Signed-off-by: Nick Desaulniers --- arch/powerpc/xmon/Makefile | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/powerpc/xmon/Makefile b/arch/powerpc/xmon/Makefile index 7705aa74a24d..d334de392e6c 100644 --- a/arch/powerpc/xmon/Makefile +++ b/arch/powerpc/xmon/Makefile @@ -10,6 +10,12 @@ KCSAN_SANITIZE := n # Disable ftrace for the entire directory ccflags-remove-$(CONFIG_FUNCTION_TRACER) += $(CC_FLAGS_FTRACE) +ifdef CONFIG_CC_IS_CLANG +# clang stores addresses on the stack causing the frame size to blow +# out. See https://github.com/ClangBuiltLinux/linux/issues/252 +KBUILD_CFLAGS += -Wframe-larger-than=4096 +endif + ccflags-$(CONFIG_PPC64) := $(NO_MINIMAL_TOC) obj-y += xmon.o nonstdio.o spr_access.o xmon_bpts.o --- base-commit: 2ee82481c392eec06a7ef28df61b7f0d8e45be2e change-id: 20230828-ppc_rerevert-647427f04ce1 Best regards, -- Nick Desaulniers