Messages in this thread | | | From | Geert Uytterhoeven <> | Date | Tue, 28 Sep 2021 17:39:19 +0200 | Subject | Re: drivers/gpu/drm/kmb/kmb_dsi.c:812:2: warning: unused function 'set_test_mode_src_osc_freq_target_low_bits' |
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On Tue, Sep 28, 2021 at 5:09 PM kernel test robot <lkp@intel.com> wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master > head: 0513e464f9007b70b96740271a948ca5ab6e7dd7 > commit: ade896460e4a62f5e4a892a98d254937f6f5b64c drm: DRM_KMB_DISPLAY should depend on ARCH_KEEMBAY > date: 11 months ago > config: mips-randconfig-r013-20210928 (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 mips cross compiling tool for clang build > # apt-get install binutils-mips-linux-gnu > # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ade896460e4a62f5e4a892a98d254937f6f5b64c > git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > git fetch --no-tags linus master > git checkout ade896460e4a62f5e4a892a98d254937f6f5b64c > # save the attached .config to linux build tree > mkdir build_dir > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash drivers/gpu/drm/kmb/ drivers/net/ethernet/mellanox/mlxsw/ mm/ > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <lkp@intel.com> > > All warnings (new ones prefixed by >>): > > >> drivers/gpu/drm/kmb/kmb_dsi.c:812:2: warning: unused function 'set_test_mode_src_osc_freq_target_low_bits' > set_test_mode_src_osc_freq_target_low_bits(struct kmb_dsi > ^ > >> drivers/gpu/drm/kmb/kmb_dsi.c:824:2: warning: unused function 'set_test_mode_src_osc_freq_target_hi_bits' > set_test_mode_src_osc_freq_target_hi_bits(struct kmb_dsi
These two functions are "static inline", so there should not be such warning. Toolchain issue?
> ^ > fatal error: error in backend: Nested variants found in inline asm string: '.if ( 0x00 ) != -1)) 0x00 ) != -1)) : ($( static struct ftrace_branch_data __attribute__((__aligned__(4))) __attribute__((__section__("_ftrace_branch"))) __if_trace = $( .func = __func__, .file = "arch/mips/include/asm/barrier.h", .line = 16, $); 0x00 ) != -1)) : $))) ) && ( (1 << 0) ); .set push; .set mips64r2; .rept 1; sync 0x00; .endr; .set pop; .else; ; .endif' > clang-14: error: clang frontend command failed with exit code 70 (use -v to see invocation) > clang version 14.0.0 (git://gitmirror/llvm_project dc6e8dfdfe7efecfda318d43a06fae18b40eb498) > Target: mipsel-unknown-linux > Thread model: posix > InstalledDir: /opt/cross/clang-dc6e8dfdfe/bin > clang-14: note: diagnostic msg: > Makefile arch drivers fs include kernel mm net nr_bisected scripts source usr > > > vim +/set_test_mode_src_osc_freq_target_low_bits +812 drivers/gpu/drm/kmb/kmb_dsi.c > > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 810 > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 811 static inline void > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 @812 set_test_mode_src_osc_freq_target_low_bits(struct kmb_dsi *kmb_dsi, > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 813 u32 dphy_no, > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 814 u32 freq) > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 815 { > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 816 /* Typical rise/fall time=166, refer Table 1207 databook, > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 817 * sr_osc_freq_target[7:0] > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 818 */ > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 819 test_mode_send(kmb_dsi, dphy_no, TEST_CODE_SLEW_RATE_DDL_CYCLES, > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 820 (freq & 0x7f)); > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 821 } > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 822 > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 823 static inline void > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 @824 set_test_mode_src_osc_freq_target_hi_bits(struct kmb_dsi *kmb_dsi, > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 825 u32 dphy_no, > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 826 u32 freq) > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 827 { > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 828 u32 data; > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 829 > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 830 /* Flag this as high nibble */ > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 831 data = ((freq >> 6) & 0x1f) | (1 << 7); > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 832 > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 833 /* Typical rise/fall time=166, refer Table 1207 databook, > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 834 * sr_osc_freq_target[11:7] > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 835 */ > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 836 test_mode_send(kmb_dsi, dphy_no, TEST_CODE_SLEW_RATE_DDL_CYCLES, data); > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 837 } > 98521f4d4b4cb26 Anitha Chrisanthus 2020-11-04 838 > > :::::: The code at line 812 was first introduced by commit > :::::: 98521f4d4b4cb265374a4b1e13b41287a1960243 drm/kmb: Mipi DSI part of the display driver > > :::::: TO: Anitha Chrisanthus <anitha.chrisanthus@intel.com> > :::::: CC: Sam Ravnborg <sam@ravnborg.org> > > --- > 0-DAY CI Kernel Test Service, Intel Corporation > https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
Gr{oetje,eeting}s,
Geert
-- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
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