[kbuild-all] [zen-kernel-zen-kernel:5.6/zen-sauce 2/26] arch/um/include/asm/uaccess.h:17:29: error: comparison of unsigned expression >= 0 is always true

tree: https://github.com/zen-kernel/zen-kernel 5.6/zen-sauce head: 28b9700a330bb5957c6ad7263095d148d5c35242 commit: 571a78afe655a6e606ff127b57f7a01d3bc68614 [2/26] ZEN: Add VHBA driver config: um-allmodconfig (attached as .config) compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0 reproduce: git checkout 571a78afe655a6e606ff127b57f7a01d3bc68614 # save the attached .config to linux build tree make ARCH=um If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>, old ones prefixed by <<): In file included from include/linux/init.h:5:0, from drivers/scsi/vhba/vhba.c:23: include/asm-generic/fixmap.h: In function 'fix_to_virt': BUILD_BUG_ON(idx >= __end_of_fixed_addresses); ^ include/linux/compiler.h:330:9: note: in definition of macro '__compiletime_assert' if (!(condition)) ^~~~~~~~~ include/linux/compiler.h:350:2: note: in expansion of macro '_compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) ^~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert' #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) ^~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:50:2: note: in expansion of macro 'BUILD_BUG_ON_MSG' BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition) ^~~~~~~~~~~~~~~~ include/asm-generic/fixmap.h:32:2: note: in expansion of macro 'BUILD_BUG_ON' BUILD_BUG_ON(idx >= __end_of_fixed_addresses); ^~~~~~~~~~~~ In file included from include/linux/uaccess.h:11:0, from include/linux/highmem.h:9, from drivers/scsi/vhba/vhba.c:25: arch/um/include/asm/uaccess.h: In function '__access_ok': (((unsigned long) (addr) >= FIXADDR_USER_START) && ^ arch/um/include/asm/uaccess.h:45:3: note: in expansion of macro '__access_ok_vsyscall' __access_ok_vsyscall(addr, size) || ^~~~~~~~~~~~~~~~~~~~ In file included from drivers/scsi/vhba/vhba.c:42:0: drivers/scsi/vhba/vhba.c: At top level: drivers/scsi/vhba/vhba.c:483:15: error: no previous prototype for 'vhba_queuecommand' [-Werror=missing-prototypes] DEF_SCSI_QCMD(vhba_queuecommand) ^ include/scsi/scsi_host.h:488:6: note: in definition of macro 'DEF_SCSI_QCMD' int func_name(struct Scsi_Host *shost, struct scsi_cmnd *cmd) ^~~~~~~~~ cc1: all warnings being treated as errors vim +17 arch/um/include/asm/uaccess.h ^1da177e4c3f41 include/asm-um/uaccess.h Linus Torvalds 2005-04-16 11 fced95cacfc21b arch/um/include/asm/uaccess.h Al Viro 2011-08-18 12 #define __under_task_size(addr, size) \ fced95cacfc21b arch/um/include/asm/uaccess.h Al Viro 2011-08-18 13 (((unsigned long) (addr) < TASK_SIZE) && \ fced95cacfc21b arch/um/include/asm/uaccess.h Al Viro 2011-08-18 14 (((unsigned long) (addr) + (size)) < TASK_SIZE)) fced95cacfc21b arch/um/include/asm/uaccess.h Al Viro 2011-08-18 15 f8d65d27e677da arch/um/include/asm/uaccess.h Richard Weinberger 2015-05-12 16 #define __access_ok_vsyscall(addr, size) \ f8d65d27e677da arch/um/include/asm/uaccess.h Richard Weinberger 2015-05-12 @17 (((unsigned long) (addr) >= FIXADDR_USER_START) && \ fced95cacfc21b arch/um/include/asm/uaccess.h Al Viro 2011-08-18 18 ((unsigned long) (addr) + (size) <= FIXADDR_USER_END) && \ fced95cacfc21b arch/um/include/asm/uaccess.h Al Viro 2011-08-18 19 ((unsigned long) (addr) + (size) >= (unsigned long)(addr))) fced95cacfc21b arch/um/include/asm/uaccess.h Al Viro 2011-08-18 20 :::::: The code at line 17 was first introduced by commit :::::: f8d65d27e677da0ce33de570e3068308a77ed2b1 um: Rework uaccess code :::::: TO: Richard Weinberger <richard(a)nod.at&gt; :::::: CC: Richard Weinberger <richard(a)nod.at&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org