[kbuild-all] [linux-stable-rc:linux-4.19.y 3686/9999] arch/mips/loongson64/common/mem.c:95:5: warning: no previous prototype for '__uncached_access'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.19.y head: e864f43593ccf9180c61738abdf1c1dde091367d commit: aaa81d9e6523b4fe55aee536ce10bcc1c55b5d0f [3686/9999] MIPS: Disable Loongson MMI instructions for kernel build config: mips-randconfig-r031-20210409 (attached as .config) compiler: mips64el-linux-gcc (GCC) 9.3.0 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 # https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.gi... git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git git fetch --no-tags linux-stable-rc linux-4.19.y git checkout aaa81d9e6523b4fe55aee536ce10bcc1c55b5d0f # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): 95 | int __uncached_access(struct file *file, unsigned long addr) | ^~~~~~~~~~~~~~~~~ -- 39 | void __weak __init mach_prom_init_machtype(void) | ^~~~~~~~~~~~~~~~~~~~~~~ -- In file included from sound/pci/au88x0/au8820.c:3: sound/pci/au88x0/au88x0_core.c: In function 'vortex_adbdma_setbuffers': 39 | #define hwwrite(x,y,z) writel((z),(x)+(y)) | ^~~~~~~~~~~~~~~~~~~ sound/pci/au88x0/au88x0_core.c:1115:3: note: in expansion of macro 'hwwrite' 1115 | hwwrite(vortex->mmio, | ^~~~~~~ In file included from sound/pci/au88x0/au8820.c:10: sound/pci/au88x0/au88x0_core.c:1119:2: note: here 1119 | case 3: | ^~~~ In file included from sound/pci/au88x0/au8820.c:3: 39 | #define hwwrite(x,y,z) writel((z),(x)+(y)) | ^~~~~~~~~~~~~~~~~~~ sound/pci/au88x0/au88x0_core.c:1122:3: note: in expansion of macro 'hwwrite' 1122 | hwwrite(vortex->mmio, | ^~~~~~~ In file included from sound/pci/au88x0/au8820.c:10: sound/pci/au88x0/au88x0_core.c:1126:2: note: here 1126 | case 2: | ^~~~ In file included from sound/pci/au88x0/au8820.c:3: 39 | #define hwwrite(x,y,z) writel((z),(x)+(y)) | ^~~~~~~~~~~~~~~~~~~ sound/pci/au88x0/au88x0_core.c:1128:3: note: in expansion of macro 'hwwrite' 1128 | hwwrite(vortex->mmio, | ^~~~~~~ In file included from sound/pci/au88x0/au8820.c:10: sound/pci/au88x0/au88x0_core.c:1132:2: note: here 1132 | case 1: | ^~~~ In file included from sound/pci/au88x0/au8820.c:3: sound/pci/au88x0/au88x0_core.c: In function 'vortex_wtdma_setbuffers': 39 | #define hwwrite(x,y,z) writel((z),(x)+(y)) | ^~~~~~~~~~~~~~~~~~~ sound/pci/au88x0/au88x0_core.c:1391:3: note: in expansion of macro 'hwwrite' 1391 | hwwrite(vortex->mmio, VORTEX_WTDMA_BUFBASE + (wtdma << 4) + 0xc, | ^~~~~~~ In file included from sound/pci/au88x0/au8820.c:10: sound/pci/au88x0/au88x0_core.c:1394:2: note: here 1394 | case 3: | ^~~~ In file included from sound/pci/au88x0/au8820.c:3: 39 | #define hwwrite(x,y,z) writel((z),(x)+(y)) | ^~~~~~~~~~~~~~~~~~~ sound/pci/au88x0/au88x0_core.c:1397:3: note: in expansion of macro 'hwwrite' 1397 | hwwrite(vortex->mmio, VORTEX_WTDMA_BUFBASE + (wtdma << 4) + 0x8, | ^~~~~~~ In file included from sound/pci/au88x0/au8820.c:10: sound/pci/au88x0/au88x0_core.c:1400:2: note: here 1400 | case 2: | ^~~~ In file included from sound/pci/au88x0/au8820.c:3: 39 | #define hwwrite(x,y,z) writel((z),(x)+(y)) | ^~~~~~~~~~~~~~~~~~~ sound/pci/au88x0/au88x0_core.c:1402:3: note: in expansion of macro 'hwwrite' 1402 | hwwrite(vortex->mmio, VORTEX_WTDMA_BUFBASE + (wtdma << 4) + 0x4, | ^~~~~~~ In file included from sound/pci/au88x0/au8820.c:10: sound/pci/au88x0/au88x0_core.c:1405:2: note: here 1405 | case 1: | ^~~~ -- sound/pci/hda/patch_realtek.c: In function 'alc269_suspend': 3565 | alc5505_dsp_suspend(codec); | ^ sound/pci/hda/patch_realtek.c: In function 'alc269_resume': sound/pci/hda/patch_realtek.c:3600:28: warning: suggest braces around empty body in an 'if' statement [-Wempty-body] 3600 | alc5505_dsp_resume(codec); | ^ -- sound/pci/lx6464es/lx_core.c: In function 'lx_interrupt_handle_async_events': 1005 | u64 urun_mask; | ^~~~~~~~~ 1004 | u64 orun_mask; | ^~~~~~~~~ vim +/__uncached_access +95 arch/mips/loongson64/common/mem.c 1a08f1524d2ee4 arch/mips/loongson/common/mem.c Huacai Chen 2014-03-21 93 42d226c7248a28 arch/mips/lemote/lm2e/mem.c Songmao Tian 2007-06-06 94 /* override of arch/mips/mm/cache.c: __uncached_access */ 42d226c7248a28 arch/mips/lemote/lm2e/mem.c Songmao Tian 2007-06-06 @95 int __uncached_access(struct file *file, unsigned long addr) 42d226c7248a28 arch/mips/lemote/lm2e/mem.c Songmao Tian 2007-06-06 96 { 6b2f3d1f769be5 arch/mips/loongson/common/mem.c Christoph Hellwig 2009-10-27 97 if (file->f_flags & O_DSYNC) 42d226c7248a28 arch/mips/lemote/lm2e/mem.c Songmao Tian 2007-06-06 98 return 1; 42d226c7248a28 arch/mips/lemote/lm2e/mem.c Songmao Tian 2007-06-06 99 42d226c7248a28 arch/mips/lemote/lm2e/mem.c Songmao Tian 2007-06-06 100 return addr >= __pa(high_memory) || 85749d24bcf904 arch/mips/loongson/common/mem.c Wu Zhangjin 2009-07-02 101 ((addr >= LOONGSON_MMIO_MEM_START) && 85749d24bcf904 arch/mips/loongson/common/mem.c Wu Zhangjin 2009-07-02 102 (addr < LOONGSON_MMIO_MEM_END)); 42d226c7248a28 arch/mips/lemote/lm2e/mem.c Songmao Tian 2007-06-06 103 } 22f1fdfd62a5f6 arch/mips/loongson/common/mem.c Wu Zhangjin 2009-11-11 104 :::::: The code at line 95 was first introduced by commit :::::: 42d226c7248a28ff8c478c06b7e9bd9ef5d73574 [MIPS] New files for lemote fulong mini-PC support :::::: TO: Songmao Tian <tiansm(a)lemote.com&gt; :::::: CC: Ralf Baechle <ralf(a)linux-mips.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org