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Mon, 4 Nov 2024 18:10:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1730743828; bh=A9QEobhM0Tk66PTKUxkoy2PH75AkXVl7kAtDO3RqV40=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=OMfO1/O0f3WTFHcevl3ZKLDtacBxMdE3BT7RFEx/b3+uCvKbbdhBTvloMt0wa0OwX n90Z5gcaPjxU3VikQM87AaL+farAbSj6GceGjTrdFooAVP1M8KvLcXwQ38fUeWBv8N nSueT0gGDtEoY8EFJAIpvIVUUWXl5Q+eF6EU53irRc2UnkG16rz8Z0sqp62Nd22MA5 VHQu3uGLJaQJEr8WHqAb0R2V4++l7ByYkHuVDtoe7B8G75lQBftyc2Y6tQRfZwmKhm h8Lgj1UBc9z/xdcPqGhAJ2c/yL+WIAA6KPIsfzCpa8AVQaSz9Mv0vPpuMxziyvvJML 5V3YtcPfQjK/A== Date: Mon, 4 Nov 2024 18:10:26 +0000 From: Eric Biggers To: linux-kernel@vger.kernel.org Cc: linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-crypto@vger.kernel.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-mips@vger.kernel.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, loongarch@lists.linux.dev, sparclinux@vger.kernel.org, x86@kernel.org, Ard Biesheuvel Subject: Re: [PATCH v3 05/18] arm/crc32: expose CRC32 functions through lib Message-ID: <20241104181026.GC1049313@google.com> References: <20241103223154.136127-1-ebiggers@kernel.org> <20241103223154.136127-6-ebiggers@kernel.org> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20241103223154.136127-6-ebiggers@kernel.org> On Sun, Nov 03, 2024 at 02:31:41PM -0800, Eric Biggers wrote: > -static int __init crc32_pmull_mod_init(void) > -{ > - if (elf_hwcap2 & HWCAP2_PMULL) { > - crc32_pmull_algs[0].update = crc32_pmull_update; > - crc32_pmull_algs[1].update = crc32c_pmull_update; > - > - if (elf_hwcap2 & HWCAP2_CRC32) { > - fallback_crc32 = crc32_armv8_le; > - fallback_crc32c = crc32c_armv8_le; > - } else { > - fallback_crc32 = crc32_le; > - fallback_crc32c = __crc32c_le; > - } > - } else if (!(elf_hwcap2 & HWCAP2_CRC32)) { > - return -ENODEV; > - } [...] > +static u32 crc32_le_scalar(u32 crc, const u8 *p, size_t len) > +{ > + if (static_branch_likely(&have_crc32)) > + return crc32_armv8_le(crc, p, len); > + return crc32_le_base(crc, p, len); > +} kernel test robot reported a build error on this patch, "undefined symbol: __kcfi_typeid_crc32_armv8_le". It's because crc32-core.S uses SYM_TYPED_FUNC_START(crc32_armv8_le), and this patch makes crc32_armv8_le be called only via direct calls, not indirect calls as it was before. I will fix this by replacing SYM_TYPED_FUNC_START by SYM_FUNC_START. - Eric