From: kernel test robot <lkp@intel.com>
To: Will Deacon <will@kernel.org>
Cc: llvm@lists.linux.dev, kbuild-all@lists.01.org,
linux-kernel@vger.kernel.org
Subject: arch/arm64/kernel/proton-pack.c:558:13: warning: no previous prototype for function 'spectre_v4_patch_fw_mitigation_enable'
Date: Mon, 27 Sep 2021 22:37:21 +0800 [thread overview]
Message-ID: <202109272219.2UEG8dbd-lkp@intel.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 4380 bytes --]
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 92477dd1faa650e50bd3bb35a6c0b8d09198cc35
commit: c28762070ca651fe7a981b8f31d972c9b7d2c386 arm64: Rewrite Spectre-v4 mitigation code
date: 12 months ago
config: arm64-randconfig-r016-20210927 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project dc6e8dfdfe7efecfda318d43a06fae18b40eb498)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install arm64 cross compiling tool for clang build
# apt-get install binutils-aarch64-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c28762070ca651fe7a981b8f31d972c9b7d2c386
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout c28762070ca651fe7a981b8f31d972c9b7d2c386
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
arch/arm64/kernel/proton-pack.c:288:2: error: implicit declaration of function 'install_bp_hardening_cb' [-Werror,-Wimplicit-function-declaration]
install_bp_hardening_cb(cb);
^
arch/arm64/kernel/proton-pack.c:304:2: error: implicit declaration of function 'install_bp_hardening_cb' [-Werror,-Wimplicit-function-declaration]
install_bp_hardening_cb(qcom_link_stack_sanitisation);
^
>> arch/arm64/kernel/proton-pack.c:558:13: warning: no previous prototype for function 'spectre_v4_patch_fw_mitigation_enable' [-Wmissing-prototypes]
void __init spectre_v4_patch_fw_mitigation_enable(struct alt_instr *alt,
^
arch/arm64/kernel/proton-pack.c:558:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __init spectre_v4_patch_fw_mitigation_enable(struct alt_instr *alt,
^
static
>> arch/arm64/kernel/proton-pack.c:578:13: warning: no previous prototype for function 'spectre_v4_patch_fw_mitigation_conduit' [-Wmissing-prototypes]
void __init spectre_v4_patch_fw_mitigation_conduit(struct alt_instr *alt,
^
arch/arm64/kernel/proton-pack.c:578:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __init spectre_v4_patch_fw_mitigation_conduit(struct alt_instr *alt,
^
static
2 warnings and 2 errors generated.
vim +/spectre_v4_patch_fw_mitigation_enable +558 arch/arm64/kernel/proton-pack.c
553
554 /*
555 * Patch a branch over the Spectre-v4 mitigation code with a NOP so that
556 * we fallthrough and check whether firmware needs to be called on this CPU.
557 */
> 558 void __init spectre_v4_patch_fw_mitigation_enable(struct alt_instr *alt,
559 __le32 *origptr,
560 __le32 *updptr, int nr_inst)
561 {
562 BUG_ON(nr_inst != 1); /* Branch -> NOP */
563
564 if (spectre_v4_mitigations_off())
565 return;
566
567 if (cpus_have_final_cap(ARM64_SSBS))
568 return;
569
570 if (spectre_v4_mitigations_dynamic())
571 *updptr = cpu_to_le32(aarch64_insn_gen_nop());
572 }
573
574 /*
575 * Patch a NOP in the Spectre-v4 mitigation code with an SMC/HVC instruction
576 * to call into firmware to adjust the mitigation state.
577 */
> 578 void __init spectre_v4_patch_fw_mitigation_conduit(struct alt_instr *alt,
579 __le32 *origptr,
580 __le32 *updptr, int nr_inst)
581 {
582 u32 insn;
583
584 BUG_ON(nr_inst != 1); /* NOP -> HVC/SMC */
585
586 switch (arm_smccc_1_1_get_conduit()) {
587 case SMCCC_CONDUIT_HVC:
588 insn = aarch64_insn_get_hvc_value();
589 break;
590 case SMCCC_CONDUIT_SMC:
591 insn = aarch64_insn_get_smc_value();
592 break;
593 default:
594 return;
595 }
596
597 *updptr = cpu_to_le32(insn);
598 }
599
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 32122 bytes --]
next reply other threads:[~2021-09-27 14:38 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-27 14:37 kernel test robot [this message]
-- strict thread matches above, loose matches on Subject: below --
2021-08-13 23:11 arch/arm64/kernel/proton-pack.c:558:13: warning: no previous prototype for function 'spectre_v4_patch_fw_mitigation_enable' kernel test robot
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=202109272219.2UEG8dbd-lkp@intel.com \
--to=lkp@intel.com \
--cc=kbuild-all@lists.01.org \
--cc=linux-kernel@vger.kernel.org \
--cc=llvm@lists.linux.dev \
--cc=will@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).