[zen-kernel-zen-kernel:5.7/zen-sauce 2/22] include/asm-generic/fixmap.h:32:19: error: comparison of unsigned expression >= 0 is always true

[zen-kernel-zen-kernel:5.7/zen-sauce 2/22] include/asm-generic/fixmap.h:32:19: error: comparison of unsigned expression >= 0 is always true

[kbuild test robot]

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tree:   https://github.com/zen-kernel/zen-kernel 5.7/zen-sauce
head:   9555af4960645728364e3b2aaae65e6ea7df0062
commit: a9bd5ac696bcd0860a8c32e9e00c9558e68c5854 [2/22] ZEN: Add VHBA driver
config: um-allmodconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-13) 9.3.0
reproduce (this is a W=1 build):
        git checkout a9bd5ac696bcd0860a8c32e9e00c9558e68c5854
        # save the attached .config to linux build tree
        make W=1 ARCH=um 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@intel.com>

All errors (new ones prefixed by >>, old ones prefixed by <<):

cc1: error: arch/um/include/uapi: No such file or directory [-Werror=missing-include-dirs]
In file included from include/linux/uaccess.h:11,
from include/linux/sched/task.h:11,
from include/linux/sched/signal.h:9,
from include/linux/rcuwait.h:6,
from include/linux/percpu-rwsem.h:7,
from include/linux/fs.h:34,
from include/linux/highmem.h:5,
from drivers/scsi/vhba/vhba.c:25:
arch/um/include/asm/uaccess.h: In function '__access_ok':
arch/um/include/asm/uaccess.h:17:29: error: comparison of unsigned expression >= 0 is always true [-Werror=type-limits]
17 |    (((unsigned long) (addr) >= FIXADDR_USER_START) &&          |                             ^~
arch/um/include/asm/uaccess.h:45:3: note: in expansion of macro '__access_ok_vsyscall'
45 |   __access_ok_vsyscall(addr, size) ||
|   ^~~~~~~~~~~~~~~~~~~~
In file included from include/linux/init.h:5,
from drivers/scsi/vhba/vhba.c:23:
include/asm-generic/fixmap.h: In function 'fix_to_virt':
>> include/asm-generic/fixmap.h:32:19: error: comparison of unsigned expression >= 0 is always true [-Werror=type-limits]
32 |  BUILD_BUG_ON(idx >= __end_of_fixed_addresses);
|                   ^~
include/linux/compiler.h:330:9: note: in definition of macro '__compiletime_assert'
330 |   if (!(condition))              |         ^~~~~~~~~
include/linux/compiler.h:350:2: note: in expansion of macro '_compiletime_assert'
350 |  _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
|  ^~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
39 | #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'
50 |  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'
32 |  BUILD_BUG_ON(idx >= __end_of_fixed_addresses);
|  ^~~~~~~~~~~~
In file included from drivers/scsi/vhba/vhba.c:42:
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]
483 | DEF_SCSI_QCMD(vhba_queuecommand)
|               ^~~~~~~~~~~~~~~~~
include/scsi/scsi_host.h:488:6: note: in definition of macro 'DEF_SCSI_QCMD'
488 |  int func_name(struct Scsi_Host *shost, struct scsi_cmnd *cmd)          |      ^~~~~~~~~
cc1: all warnings being treated as errors

vim +32 include/asm-generic/fixmap.h

d57c33c5daa4ef Mark Salter 2014-01-23  23  
d57c33c5daa4ef Mark Salter 2014-01-23  24  #ifndef __ASSEMBLY__
d57c33c5daa4ef Mark Salter 2014-01-23  25  /*
d57c33c5daa4ef Mark Salter 2014-01-23  26   * 'index to address' translation. If anyone tries to use the idx
d57c33c5daa4ef Mark Salter 2014-01-23  27   * directly without translation, we catch the bug with a NULL-deference
d57c33c5daa4ef Mark Salter 2014-01-23  28   * kernel oops. Illegal ranges of incoming indices are caught too.
d57c33c5daa4ef Mark Salter 2014-01-23  29   */
d57c33c5daa4ef Mark Salter 2014-01-23  30  static __always_inline unsigned long fix_to_virt(const unsigned int idx)
d57c33c5daa4ef Mark Salter 2014-01-23  31  {
d57c33c5daa4ef Mark Salter 2014-01-23 @32  	BUILD_BUG_ON(idx >= __end_of_fixed_addresses);
d57c33c5daa4ef Mark Salter 2014-01-23  33  	return __fix_to_virt(idx);
d57c33c5daa4ef Mark Salter 2014-01-23  34  }
d57c33c5daa4ef Mark Salter 2014-01-23  35  

:::::: The code at line 32 was first introduced by commit
:::::: d57c33c5daa4efa9e4d303bd0faf868080b532be add generic fixmap.h

:::::: TO: Mark Salter <msalter@redhat.com>
:::::: CC: Linus Torvalds <torvalds@linux-foundation.org>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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