On Sat, 20 Jun 2020 at 21:22, kernel test robot <lkp@xxxxxxxxx> wrote: > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master > head: 4333a9b0b67bb4e8bcd91bdd80da80b0ec151162 > commit: 79591b7db21d255db158afaa48c557dcab631a1c spi: Add a PTP system timestamp to the transfer structure > date: 9 months ago > config: x86_64-randconfig-a014-20200620 (attached as .config) > compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project f5bbe390d23d7da0ffb110cdb24b583c2dc87eba) > 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 x86_64 cross compiling tool for clang build > # apt-get install binutils-x86-64-linux-gnu > git checkout 79591b7db21d255db158afaa48c557dcab631a1c > # save the attached .config to linux build tree > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <lkp@xxxxxxxxx> > > All warnings (new ones prefixed by >>, old ones prefixed by <<): > > >> drivers/gpu/drm/panel/panel-samsung-ld9040.c:240:12: warning: stack frame size of 8312 bytes in function 'ld9040_prepare' [-Wframe-larger-than=] > static int ld9040_prepare(struct drm_panel *panel) > ^ > 1 warning generated. > > vim +/ld9040_prepare +240 drivers/gpu/drm/panel/panel-samsung-ld9040.c > > ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26 239 > 099b3e8699322e drivers/gpu/drm/panel/panel-ld9040.c Ajay Kumar 2014-07-31 @240 static int ld9040_prepare(struct drm_panel *panel) > ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26 241 { > ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26 242 struct ld9040 *ctx = panel_to_ld9040(panel); > ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26 243 int ret; > ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26 244 > ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26 245 ret = ld9040_power_on(ctx); > ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26 246 if (ret < 0) > ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26 247 return ret; > ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26 248 > ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26 249 ld9040_init(ctx); > ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26 250 > ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26 251 ret = ld9040_clear_error(ctx); > ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26 252 > ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26 253 if (ret < 0) > 8141028278c2ea drivers/gpu/drm/panel/panel-ld9040.c Ajay Kumar 2014-07-31 254 ld9040_unprepare(panel); > ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26 255 > ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26 256 return ret; > ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26 257 } > ff219937763253 drivers/gpu/drm/panel/panel-ld9040.c Andrzej Hajda 2014-03-26 258 > > :::::: The code at line 240 was first introduced by commit > :::::: 099b3e8699322efb7229913d2c1651588205f182 drm/panel: ld9040: Add dummy prepare and unprepare routines > > :::::: TO: Ajay Kumar <ajaykumar.rs@xxxxxxxxxxx> > :::::: CC: Thierry Reding <treding@xxxxxxxxxx> > > --- > 0-DAY CI Kernel Test Service, Intel Corporation > https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx I really don't get what's the problem here. The listing of ld9040_prepare at the given commit and with the given .config is: 0000000000000630 <ld9040_prepare>: { 630: f3 0f 1e fa endbr64 634: e8 00 00 00 00 callq 639 <ld9040_prepare+0x9> 635: R_X86_64_PLT32 __fentry__-0x4 639: 41 56 push %r14 ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies); 63b: 48 8d 77 30 lea 0x30(%rdi),%rsi { 63f: 41 55 push %r13 641: 41 54 push %r12 ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies); 643: 4c 8d 67 f8 lea -0x8(%rdi),%r12 { 647: 55 push %rbp 648: 48 89 fd mov %rdi,%rbp ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies); 64b: bf 02 00 00 00 mov $0x2,%edi 650: e8 00 00 00 00 callq 655 <ld9040_prepare+0x25> 651: R_X86_64_PLT32 regulator_bulk_enable-0x4 655: 41 89 c5 mov %eax,%r13d if (ret < 0) 658: 85 c0 test %eax,%eax 65a: 0f 88 3f 02 00 00 js 89f <ld9040_prepare+0x26f> msleep(ctx->power_on_delay); 660: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 667: fc ff df 66a: 48 8d 7d 68 lea 0x68(%rbp),%rdi 66e: 48 89 fa mov %rdi,%rdx 671: 48 c1 ea 03 shr $0x3,%rdx 675: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax 679: 84 c0 test %al,%al 67b: 74 08 je 685 <ld9040_prepare+0x55> 67d: 3c 03 cmp $0x3,%al 67f: 0f 8e 38 02 00 00 jle 8bd <ld9040_prepare+0x28d> 685: 8b 7d 68 mov 0x68(%rbp),%edi gpiod_set_value(ctx->reset_gpio, 0); 688: 4c 8d 75 60 lea 0x60(%rbp),%r14 msleep(ctx->power_on_delay); 68c: e8 00 00 00 00 callq 691 <ld9040_prepare+0x61> 68d: R_X86_64_PLT32 msleep-0x4 gpiod_set_value(ctx->reset_gpio, 0); 691: 4c 89 f2 mov %r14,%rdx 694: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 69b: fc ff df 69e: 48 c1 ea 03 shr $0x3,%rdx 6a2: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 6a6: 0f 85 53 02 00 00 jne 8ff <ld9040_prepare+0x2cf> 6ac: 48 8b 7d 60 mov 0x60(%rbp),%rdi msleep(ctx->reset_delay); 6b0: 4c 8d 6d 6c lea 0x6c(%rbp),%r13 gpiod_set_value(ctx->reset_gpio, 0); 6b4: 31 f6 xor %esi,%esi 6b6: e8 00 00 00 00 callq 6bb <ld9040_prepare+0x8b> 6b7: R_X86_64_PLT32 gpiod_set_value-0x4 msleep(ctx->reset_delay); 6bb: 4c 89 ea mov %r13,%rdx 6be: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 6c5: fc ff df 6c8: 48 c1 ea 03 shr $0x3,%rdx 6cc: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx 6d0: 4c 89 e8 mov %r13,%rax 6d3: 83 e0 07 and $0x7,%eax 6d6: 83 c0 03 add $0x3,%eax 6d9: 38 d0 cmp %dl,%al 6db: 7c 08 jl 6e5 <ld9040_prepare+0xb5> 6dd: 84 d2 test %dl,%dl 6df: 0f 85 00 02 00 00 jne 8e5 <ld9040_prepare+0x2b5> 6e5: 8b 7d 6c mov 0x6c(%rbp),%edi 6e8: e8 00 00 00 00 callq 6ed <ld9040_prepare+0xbd> 6e9: R_X86_64_PLT32 msleep-0x4 gpiod_set_value(ctx->reset_gpio, 1); 6ed: 4c 89 f2 mov %r14,%rdx 6f0: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 6f7: fc ff df 6fa: 48 c1 ea 03 shr $0x3,%rdx 6fe: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 702: 0f 85 ea 01 00 00 jne 8f2 <ld9040_prepare+0x2c2> 708: 48 8b 7d 60 mov 0x60(%rbp),%rdi 70c: be 01 00 00 00 mov $0x1,%esi 711: e8 00 00 00 00 callq 716 <ld9040_prepare+0xe6> 712: R_X86_64_PLT32 gpiod_set_value-0x4 msleep(ctx->reset_delay); 716: 4c 89 ea mov %r13,%rdx 719: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 720: fc ff df 723: 48 c1 ea 03 shr $0x3,%rdx 727: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx 72b: 4c 89 e8 mov %r13,%rax 72e: 83 e0 07 and $0x7,%eax 731: 83 c0 03 add $0x3,%eax 734: 38 d0 cmp %dl,%al 736: 7c 08 jl 740 <ld9040_prepare+0x110> 738: 84 d2 test %dl,%dl 73a: 0f 85 98 01 00 00 jne 8d8 <ld9040_prepare+0x2a8> 740: 8b 7d 6c mov 0x6c(%rbp),%edi 743: e8 00 00 00 00 callq 748 <ld9040_prepare+0x118> 744: R_X86_64_PLT32 msleep-0x4 ld9040_dcs_write_seq_static(ctx, MCS_USER_SETTING, 0x5a, 0x5a); 748: ba 03 00 00 00 mov $0x3,%edx 74d: 48 c7 c6 00 00 00 00 mov $0x0,%rsi 750: R_X86_64_32S .rodata+0x520 754: 4c 89 e7 mov %r12,%rdi 757: e8 f4 fc ff ff callq 450 <ld9040_dcs_write> ld9040_dcs_write_seq_static(ctx, MCS_PANEL_CONDITION, 75c: ba 18 00 00 00 mov $0x18,%edx 761: 48 c7 c6 00 00 00 00 mov $0x0,%rsi 764: R_X86_64_32S .rodata+0x4e0 768: 4c 89 e7 mov %r12,%rdi 76b: e8 e0 fc ff ff callq 450 <ld9040_dcs_write> ld9040_dcs_write_seq_static(ctx, MCS_DISPCTL, 770: ba 06 00 00 00 mov $0x6,%edx 775: 48 c7 c6 00 00 00 00 mov $0x0,%rsi 778: R_X86_64_32S .rodata+0x4a0 77c: 4c 89 e7 mov %r12,%rdi 77f: e8 cc fc ff ff callq 450 <ld9040_dcs_write> ld9040_dcs_write_seq_static(ctx, MCS_MANPWR, 0x04); 784: ba 02 00 00 00 mov $0x2,%edx 789: 48 c7 c6 00 00 00 00 mov $0x0,%rsi 78c: R_X86_64_32S .rodata+0x460 790: 4c 89 e7 mov %r12,%rdi 793: e8 b8 fc ff ff callq 450 <ld9040_dcs_write> ld9040_dcs_write_seq_static(ctx, MCS_POWER_CTRL, 798: ba 08 00 00 00 mov $0x8,%edx 79d: 48 c7 c6 00 00 00 00 mov $0x0,%rsi 7a0: R_X86_64_32S .rodata+0x420 7a4: 4c 89 e7 mov %r12,%rdi 7a7: e8 a4 fc ff ff callq 450 <ld9040_dcs_write> ld9040_dcs_write_seq_static(ctx, MCS_ELVSS_ON, 0x0d, 0x00, 0x16); 7ac: ba 04 00 00 00 mov $0x4,%edx 7b1: 48 c7 c6 00 00 00 00 mov $0x0,%rsi 7b4: R_X86_64_32S .rodata+0x3e0 7b8: 4c 89 e7 mov %r12,%rdi 7bb: e8 90 fc ff ff callq 450 <ld9040_dcs_write> ld9040_dcs_write_seq_static(ctx, MCS_GTCON, 0x09, 0x00, 0x00); 7c0: ba 04 00 00 00 mov $0x4,%edx 7c5: 4c 89 e7 mov %r12,%rdi 7c8: 48 c7 c6 00 00 00 00 mov $0x0,%rsi 7cb: R_X86_64_32S .rodata+0x3a0 7cf: e8 7c fc ff ff callq 450 <ld9040_dcs_write> ld9040_dcs_write(ctx, ld9040_gammas[ctx->brightness], 7d4: 48 8d bd a8 00 00 00 lea 0xa8(%rbp),%rdi 7db: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 7e2: fc ff df 7e5: 48 89 fa mov %rdi,%rdx 7e8: 48 c1 ea 03 shr $0x3,%rdx 7ec: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax 7f0: 84 c0 test %al,%al 7f2: 74 08 je 7fc <ld9040_prepare+0x1cc> 7f4: 3c 03 cmp $0x3,%al 7f6: 0f 8e d2 00 00 00 jle 8ce <ld9040_prepare+0x29e> 7fc: 48 63 85 a8 00 00 00 movslq 0xa8(%rbp),%rax 803: 4c 89 e7 mov %r12,%rdi 806: 48 8d 14 80 lea (%rax,%rax,4),%rdx 80a: 48 8d 04 50 lea (%rax,%rdx,2),%rax 80e: ba 16 00 00 00 mov $0x16,%edx 813: 48 8d b4 00 00 00 00 lea 0x0(%rax,%rax,1),%rsi 81a: 00 817: R_X86_64_32S .rodata+0x840 81b: e8 30 fc ff ff callq 450 <ld9040_dcs_write> ld9040_dcs_write_seq_static(ctx, MCS_GAMMA_CTRL, 0x02, 0x5a); 820: ba 03 00 00 00 mov $0x3,%edx 825: 48 c7 c6 00 00 00 00 mov $0x0,%rsi 828: R_X86_64_32S .rodata+0x2e0 82c: 4c 89 e7 mov %r12,%rdi 82f: e8 1c fc ff ff callq 450 <ld9040_dcs_write> ld9040_dcs_write_seq_static(ctx, MIPI_DCS_EXIT_SLEEP_MODE); 834: ba 01 00 00 00 mov $0x1,%edx 839: 48 c7 c6 00 00 00 00 mov $0x0,%rsi 83c: R_X86_64_32S .rodata+0x360 840: 4c 89 e7 mov %r12,%rdi 843: e8 08 fc ff ff callq 450 <ld9040_dcs_write> ld9040_dcs_write_seq_static(ctx, MIPI_DCS_SET_DISPLAY_ON); 848: ba 01 00 00 00 mov $0x1,%edx 84d: 4c 89 e7 mov %r12,%rdi 850: 48 c7 c6 00 00 00 00 mov $0x0,%rsi 853: R_X86_64_32S .rodata+0x320 857: e8 f4 fb ff ff callq 450 <ld9040_dcs_write> int ret = ctx->error; 85c: 48 8d bd ac 00 00 00 lea 0xac(%rbp),%rdi 863: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 86a: fc ff df 86d: 48 89 fa mov %rdi,%rdx 870: 48 c1 ea 03 shr $0x3,%rdx 874: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx 878: 48 89 f8 mov %rdi,%rax 87b: 83 e0 07 and $0x7,%eax 87e: 83 c0 03 add $0x3,%eax 881: 38 d0 cmp %dl,%al 883: 7c 04 jl 889 <ld9040_prepare+0x259> 885: 84 d2 test %dl,%dl 887: 75 3e jne 8c7 <ld9040_prepare+0x297> 889: 44 8b ad ac 00 00 00 mov 0xac(%rbp),%r13d ctx->error = 0; 890: c7 85 ac 00 00 00 00 movl $0x0,0xac(%rbp) 897: 00 00 00 if (ret < 0) 89a: 45 85 ed test %r13d,%r13d 89d: 78 0b js 8aa <ld9040_prepare+0x27a> } 89f: 5d pop %rbp 8a0: 44 89 e8 mov %r13d,%eax 8a3: 41 5c pop %r12 8a5: 41 5d pop %r13 8a7: 41 5e pop %r14 8a9: c3 retq I don't see it having a stack frame of 8312 bytes? Thanks, -Vladimir _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
