linux-kernel - arch/powerpc/kernel/head_85xx.o: warning: objtool: .head.text+0x1a6c: unannotated intra-function call

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Date:   Mon, 16 Jan 2023 19:55:13 +0800
From:   kernel test robot <lkp@...el.com>
To:     Sathvika Vasireddy <sv@...ux.ibm.com>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Michael Ellerman <mpe@...erman.id.au>,
        "Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>
Subject: arch/powerpc/kernel/head_85xx.o: warning: objtool:
 .head.text+0x1a6c: unannotated intra-function call

Hi Sathvika,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   5dc4c995db9eb45f6373a956eb1f69460e69e6d4
commit: c984aef8c8326035570ff6e01d0ff9e79a5dfa76 objtool/powerpc: Add --mcount specific implementation
date:   8 weeks ago
config: powerpc-randconfig-c042-20230116
compiler: powerpc-linux-gcc (GCC) 12.1.0
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
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c984aef8c8326035570ff6e01d0ff9e79a5dfa76
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout c984aef8c8326035570ff6e01d0ff9e79a5dfa76
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash arch/powerpc/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> arch/powerpc/kernel/head_85xx.o: warning: objtool: .head.text+0x1a6c: unannotated intra-function call
--
   arch/powerpc/kvm/booke.c:626:6: warning: no previous prototype for 'kvmppc_watchdog_func' [-Wmissing-prototypes]
     626 | void kvmppc_watchdog_func(struct timer_list *t)
         |      ^~~~~~~~~~~~~~~~~~~~
   arch/powerpc/kvm/booke.c:1009:5: warning: no previous prototype for 'kvmppc_handle_exit' [-Wmissing-prototypes]
    1009 | int kvmppc_handle_exit(struct kvm_vcpu *vcpu, unsigned int exit_nr)
         |     ^~~~~~~~~~~~~~~~~~
   arch/powerpc/kvm/booke.c:1947:6: warning: no previous prototype for 'kvm_guest_protect_msr' [-Wmissing-prototypes]
    1947 | void kvm_guest_protect_msr(struct kvm_vcpu *vcpu, ulong prot_bitmap, bool set)
         |      ^~~~~~~~~~~~~~~~~~~~~
>> arch/powerpc/kvm/booke.o: warning: objtool: kvmppc_fill_pt_regs+0x30: unannotated intra-function call

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for HOTPLUG_CPU
   Depends on [n]: SMP [=y] && (PPC_PSERIES [=n] || PPC_PMAC [=n] || PPC_POWERNV [=n] || FSL_SOC_BOOKE [=n])
   Selected by [y]:
   - PM_SLEEP_SMP [=y] && SMP [=y] && (ARCH_SUSPEND_POSSIBLE [=y] || ARCH_HIBERNATION_POSSIBLE [=y]) && PM_SLEEP [=y]


objdump-func vmlinux.o .head.text:

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests

View attachment "config" of type "text/plain" (124365 bytes)