Messages in this thread | | | Date | Wed, 27 Oct 2021 13:36:44 +0800 | From | kernel test robot <> | Subject | [frederic-dynticks:preempt/arm-v2 2/4] arch/arm64/kernel/patching.c:93:6: warning: no previous prototype for function 'arch_static_call_transform' |
| |
tree: https://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git preempt/arm-v2 head: 5700542b609d9ab640210d7dd93621c7967688e6 commit: ede0a4b67ffccf492192c29ee88076d2abb8119b [2/4] arm64: implement support for static call trampolines config: arm64-randconfig-r003-20211027 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 5db7568a6a1fcb408eb8988abdaff2a225a8eb72) 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/frederic/linux-dynticks.git/commit/?id=ede0a4b67ffccf492192c29ee88076d2abb8119b git remote add frederic-dynticks https://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git git fetch --no-tags frederic-dynticks preempt/arm-v2 git checkout ede0a4b67ffccf492192c29ee88076d2abb8119b # 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/patching.c:93:6: warning: no previous prototype for function 'arch_static_call_transform' [-Wmissing-prototypes] void arch_static_call_transform(void *site, void *tramp, void *func, bool tail) ^ arch/arm64/kernel/patching.c:93:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void arch_static_call_transform(void *site, void *tramp, void *func, bool tail) ^ static 1 warning generated.
vim +/arch_static_call_transform +93 arch/arm64/kernel/patching.c
92 > 93 void arch_static_call_transform(void *site, void *tramp, void *func, bool tail) 94 { 95 /* 96 * -0x8 <literal> 97 * 0x0 bti c <--- trampoline entry point 98 * 0x4 <branch or nop> 99 * 0x8 ldr x16, <literal> 100 * 0xc cbz x16, 20 101 * 0x10 br x16 102 * 0x14 ret 103 */ 104 struct { 105 u64 literal; 106 __le32 insn[2]; 107 } insns; 108 u32 insn; 109 int ret; 110 111 insn = aarch64_insn_gen_hint(AARCH64_INSN_HINT_BTIC); 112 insns.literal = (u64)func; 113 insns.insn[0] = cpu_to_le32(insn); 114 115 if (!func) { 116 insn = aarch64_insn_gen_branch_reg(AARCH64_INSN_REG_LR, 117 AARCH64_INSN_BRANCH_RETURN); 118 } else { 119 insn = aarch64_insn_gen_branch_imm((u64)tramp + 4, (u64)func, 120 AARCH64_INSN_BRANCH_NOLINK); 121 122 /* 123 * Use a NOP if the branch target is out of range, and rely on 124 * the indirect call instead. 125 */ 126 if (insn == AARCH64_BREAK_FAULT) 127 insn = aarch64_insn_gen_hint(AARCH64_INSN_HINT_NOP); 128 } 129 insns.insn[1] = cpu_to_le32(insn); 130 131 ret = __aarch64_insn_write(tramp - 8, &insns, sizeof(insns)); 132 if (!WARN_ON(ret)) 133 caches_clean_inval_pou((u64)tramp - 8, sizeof(insns)); 134 } 135
--- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org [unhandled content-type:application/gzip] | |