Messages in this thread | | | Date | Tue, 25 Jul 2023 21:26:07 -0700 | Subject | Re: arch/riscv/net/bpf_jit.h:241:30: sparse: sparse: cast truncates bits from constant value (7ff becomes ff) | From | Randy Dunlap <> |
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[add Luke Nelson]
[why on earth was this sent to me?]
On 7/25/23 16:34, kernel test robot wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master > head: af2e19389c2c1d8a299e04c5105b180ef0c5b5b5 > commit: 2d311f480b52eeb2e1fd432d64b78d82952c3808 riscv, bpf: Fix patch_text implicit declaration > date: 5 months ago > config: riscv-randconfig-r072-20230725 (https://download.01.org/0day-ci/archive/20230726/202307260704.dUElCrWU-lkp@intel.com/config) > compiler: riscv64-linux-gcc (GCC) 12.3.0 > reproduce: (https://download.01.org/0day-ci/archive/20230726/202307260704.dUElCrWU-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 <lkp@intel.com> > | Closes: https://lore.kernel.org/oe-kbuild-all/202307260704.dUElCrWU-lkp@intel.com/ > > sparse warnings: (new ones prefixed by >>) > WARNING: invalid argument to '-march': '_zicbom_zihintpause' > arch/riscv/net/bpf_jit_comp64.c: note: in included file: >>> arch/riscv/net/bpf_jit.h:241:30: sparse: sparse: cast truncates bits from constant value (7ff becomes ff) > > vim +241 arch/riscv/net/bpf_jit.h > > ca6cb5447ceca6 Luke Nelson 2020-03-04 238 > ca6cb5447ceca6 Luke Nelson 2020-03-04 239 static inline u32 rv_s_insn(u16 imm11_0, u8 rs2, u8 rs1, u8 funct3, u8 opcode) > ca6cb5447ceca6 Luke Nelson 2020-03-04 240 { > ca6cb5447ceca6 Luke Nelson 2020-03-04 @241 u8 imm11_5 = imm11_0 >> 5, imm4_0 = imm11_0 & 0x1f; > ca6cb5447ceca6 Luke Nelson 2020-03-04 242 > ca6cb5447ceca6 Luke Nelson 2020-03-04 243 return (imm11_5 << 25) | (rs2 << 20) | (rs1 << 15) | (funct3 << 12) | > ca6cb5447ceca6 Luke Nelson 2020-03-04 244 (imm4_0 << 7) | opcode; > ca6cb5447ceca6 Luke Nelson 2020-03-04 245 } > ca6cb5447ceca6 Luke Nelson 2020-03-04 246 > > :::::: The code at line 241 was first introduced by commit > :::::: ca6cb5447ceca6a87d6b62c9e5d41042c34f7ffa riscv, bpf: Factor common RISC-V JIT code > > :::::: TO: Luke Nelson <lukenels@cs.washington.edu> > :::::: CC: Daniel Borkmann <daniel@iogearbox.net> >
-- ~Randy
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