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bh=tFNtQO4MJezSq1Da7LRhRWoB6TraF4nvtRNwdskfv0c=; b=AN/txhToM6VlnwEgn7HGPRictojfH48IrjrQmrfx8FKoMe1uAPwHyw9DVXi9+p/zBA4OL1 GjcGXbDQxc+wtE/nTiHWgzAahjG9JmRcY0zwQElGZAl6ao3WjA7xgG2wVgn/7TLVtKFFXM Egk201XAqXpEjCivCkaQwqEa7CoVeKRb2tsuV69zjlykGLOxSNiNuBxLKls83K6AkzIjOr Xj1rANFRnN5K0wfExrcRYzdFEsdabGo5kr8ZsKOBr+hlGcoRlFDS8bDR8qe4mnCB0gBXwY rprUBY1b5Y9EN3OcSAOlXsOkQ+KyM4nInQI/fuAKv58k7u7XNWYCqYipSTn8uA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1764011748; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=tFNtQO4MJezSq1Da7LRhRWoB6TraF4nvtRNwdskfv0c=; b=BUHhE29l2/cUl/S02UwFWAk8sb5W32l+hFpPVkHbR/s4lrnRqcOvRh24aTl+iTO7o9hQ8C 7rWaGHg6/XZcxeCA== To: kernel test robot Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, x86@kernel.org, Ingo Molnar , "Peter Zijlstra (Intel)" , Mathieu Desnoyers , linuxppc-dev@lists.ozlabs.org, Nathan Chancellor Subject: Re: [tip:core/rseq 25/39] include/linux/rseq_entry.h:132:3: error: invalid operand for instruction In-Reply-To: <202511250134.i0Jm8d7I-lkp@intel.com> References: <202511250134.i0Jm8d7I-lkp@intel.com> Date: Mon, 24 Nov 2025 20:15:46 +0100 Message-ID: <874iqji6n1.ffs@tglx> Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain On Tue, Nov 25 2025 at 01:37, kernel test robot wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git core/rseq > head: 21782b3a5cd40892cb2995aa1ec3e74dd1112f1d > commit: abc850e7616c91ebaa3f5ba3617ab0a104d45039 [25/39] rseq: Provide and use rseq_update_user_cs() > config: powerpc-randconfig-002-20251124 (https://download.01.org/0day-ci/archive/20251125/202511250134.i0Jm8d7I-lkp@intel.com/config) > compiler: clang version 16.0.6 (https://github.com/llvm/llvm-project 7cbf1a2591520c2491aa35339f227775f4d3adf6) > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251125/202511250134.i0Jm8d7I-lkp@intel.com/reproduce) > > If you fix the issue in a separate patch/commit (i.e. not just a new version of > the same patch/commit), kindly add following tags > | Reported-by: kernel test robot > | Closes: https://lore.kernel.org/oe-kbuild-all/202511250134.i0Jm8d7I-lkp@intel.com/ > > All errors (new ones prefixed by >>): > > In file included from kernel/rseq.c:75: >>> include/linux/rseq_entry.h:132:3: error: invalid operand for instruction > unsafe_get_user(start_ip, &ucs->start_ip, efault); > ^ > include/linux/uaccess.h:606:2: note: expanded from macro 'unsafe_get_user' > arch_unsafe_get_user(x, ptr, local_label); \ > ^ > arch/powerpc/include/asm/uaccess.h:458:2: note: expanded from macro 'arch_unsafe_get_user' > __get_user_size_goto(__gu_val, __gu_addr, sizeof(*(p)), e); \ > ^ > arch/powerpc/include/asm/uaccess.h:282:2: note: expanded from macro '__get_user_size_goto' > __get_user_size_allowed(x, ptr, size, __gus_retval); \ > ^ > arch/powerpc/include/asm/uaccess.h:273:10: note: expanded from macro '__get_user_size_allowed' > case 8: __get_user_asm2(x, (u64 __user *)ptr, retval); break; \ > ^ > arch/powerpc/include/asm/uaccess.h:256:4: note: expanded from macro '__get_user_asm2' > " li %1+1,0\n" \ > ^ > :7:5: note: instantiated into assembly here > li 31+1,0 Definitely not a problem of tip core/rseq. It just ends up in __get_user_asm2() and then the compiler gets unhappy about the PowerPC inline assembly for whatever reason. Thanks, tglx