Re: [kbuild-all] Re: drivers/gpu/drm/kmb/kmb_dsi.c:812:2: warning: unused function 'set_test_mode_src_osc_freq_target_low_bits'
From: Chen, Rong A
Date: Thu Jun 30 2022 - 05:08:20 EST
On 6/30/2022 2:03 AM, Geert Uytterhoeven wrote:
Hi Kernel Test Robot,
On Wed, Jun 29, 2022 at 7:57 PM kernel test robot <lkp@xxxxxxxxx> wrote:
First bad commit (maybe != root cause):
Definitely not introduced by my patch.
Looks like these functions were never used at all.
Hi Geert,
Sorry for the inconvenience, we'll add the commit to ignore list.
Best Regards,
Rong Chen
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: d9b2ba67917c18822c6a09af41c32fa161f1606b
commit: ade896460e4a62f5e4a892a98d254937f6f5b64c drm: DRM_KMB_DISPLAY should depend on ARCH_KEEMBAY
date: 1 year, 8 months ago
config: mips-randconfig-r016-20220629 (https://download.01.org/0day-ci/archive/20220630/202206300147.qdDDrtfw-lkp@xxxxxxxxx/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project a774ba7f60d1fef403b5507b1b1a7475d3684d71)
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-mipsel-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 config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash drivers/gpu/drm/kmb/ drivers/net/ethernet/mellanox/mlxsw/ drivers/scsi/ufs/ drivers/staging/ fs/xfs/
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@xxxxxxxxx>
All warnings (new ones prefixed by >>):
drivers/gpu/drm/kmb/kmb_dsi.c:812:2: warning: unused function 'set_test_mode_src_osc_freq_target_low_bits'
set_test_mode_src_osc_freq_target_low_bits(struct kmb_dsi
^
drivers/gpu/drm/kmb/kmb_dsi.c:824:2: warning: unused function 'set_test_mode_src_osc_freq_target_hi_bits'
set_test_mode_src_osc_freq_target_hi_bits(struct kmb_dsi
^
fatal error: error in backend: Nested variants found in inline asm string: '.if ( 0x00 ) != -1)) 0x00 ) != -1)) : ($( 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-15: error: clang frontend command failed with exit code 70 (use -v to see invocation)
clang version 15.0.0 (git://gitmirror/llvm_project a774ba7f60d1fef403b5507b1b1a7475d3684d71)
Target: mipsel-unknown-linux
Thread model: posix
InstalledDir: /opt/cross/clang-a774ba7f60/bin
clang-15: note: diagnostic msg:
Makefile arch drivers fs include kernel mm nr_bisected scripts source usr
vim +/set_test_mode_src_osc_freq_target_low_bits +812 drivers/gpu/drm/kmb/kmb_dsi.c
98521f4d4b4cb2 Anitha Chrisanthus 2020-11-04 810
98521f4d4b4cb2 Anitha Chrisanthus 2020-11-04 811 static inline void
98521f4d4b4cb2 Anitha Chrisanthus 2020-11-04 @812 set_test_mode_src_osc_freq_target_low_bits(struct kmb_dsi *kmb_dsi,
98521f4d4b4cb2 Anitha Chrisanthus 2020-11-04 813 u32 dphy_no,
98521f4d4b4cb2 Anitha Chrisanthus 2020-11-04 814 u32 freq)
98521f4d4b4cb2 Anitha Chrisanthus 2020-11-04 815 {
98521f4d4b4cb2 Anitha Chrisanthus 2020-11-04 816 /* Typical rise/fall time=166, refer Table 1207 databook,
98521f4d4b4cb2 Anitha Chrisanthus 2020-11-04 817 * sr_osc_freq_target[7:0]
98521f4d4b4cb2 Anitha Chrisanthus 2020-11-04 818 */
98521f4d4b4cb2 Anitha Chrisanthus 2020-11-04 819 test_mode_send(kmb_dsi, dphy_no, TEST_CODE_SLEW_RATE_DDL_CYCLES,
98521f4d4b4cb2 Anitha Chrisanthus 2020-11-04 820 (freq & 0x7f));
98521f4d4b4cb2 Anitha Chrisanthus 2020-11-04 821 }
98521f4d4b4cb2 Anitha Chrisanthus 2020-11-04 822
98521f4d4b4cb2 Anitha Chrisanthus 2020-11-04 823 static inline void
98521f4d4b4cb2 Anitha Chrisanthus 2020-11-04 @824 set_test_mode_src_osc_freq_target_hi_bits(struct kmb_dsi *kmb_dsi,
98521f4d4b4cb2 Anitha Chrisanthus 2020-11-04 825 u32 dphy_no,
98521f4d4b4cb2 Anitha Chrisanthus 2020-11-04 826 u32 freq)
98521f4d4b4cb2 Anitha Chrisanthus 2020-11-04 827 {
98521f4d4b4cb2 Anitha Chrisanthus 2020-11-04 828 u32 data;
98521f4d4b4cb2 Anitha Chrisanthus 2020-11-04 829
98521f4d4b4cb2 Anitha Chrisanthus 2020-11-04 830 /* Flag this as high nibble */
98521f4d4b4cb2 Anitha Chrisanthus 2020-11-04 831 data = ((freq >> 6) & 0x1f) | (1 << 7);
98521f4d4b4cb2 Anitha Chrisanthus 2020-11-04 832
98521f4d4b4cb2 Anitha Chrisanthus 2020-11-04 833 /* Typical rise/fall time=166, refer Table 1207 databook,
98521f4d4b4cb2 Anitha Chrisanthus 2020-11-04 834 * sr_osc_freq_target[11:7]
98521f4d4b4cb2 Anitha Chrisanthus 2020-11-04 835 */
98521f4d4b4cb2 Anitha Chrisanthus 2020-11-04 836 test_mode_send(kmb_dsi, dphy_no, TEST_CODE_SLEW_RATE_DDL_CYCLES, data);
98521f4d4b4cb2 Anitha Chrisanthus 2020-11-04 837 }
98521f4d4b4cb2 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@xxxxxxxxx>
:::::: CC: Sam Ravnborg <sam@xxxxxxxxxxxx>
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
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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