linux-kernel - arch/xtensa/include/uapi/asm/swab.h:24: undefined reference to `_

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Message-ID: <202506131034.JEmrFDve-lkp@intel.com>
Date: Fri, 13 Jun 2025 10:44:51 +0800
From: kernel test robot <lkp@...el.com>
To: Pohsun Su <pohsuns@...dia.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Robert Lin <robelin@...dia.com>
Subject: arch/xtensa/include/uapi/asm/swab.h:24: undefined reference to
 `__udivdi3'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   27605c8c0f69e319df156b471974e4e223035378
commit: b42d781e0350c969ef8155b800e33400f5f8b8a6 clocksource/drivers/timer-tegra186: Fix watchdog self-pinging
date:   4 weeks ago
config: xtensa-randconfig-r052-20250613 (https://download.01.org/0day-ci/archive/20250613/202506131034.JEmrFDve-lkp@intel.com/config)
compiler: xtensa-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250613/202506131034.JEmrFDve-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202506131034.JEmrFDve-lkp@intel.com/

All errors (new ones prefixed by >>):

   xtensa-linux-ld: drivers/clocksource/timer-tegra186.o: in function `readl_relaxed':
>> arch/xtensa/include/uapi/asm/swab.h:24: undefined reference to `__udivdi3'
   xtensa-linux-ld: drivers/clocksource/timer-tegra186.o: in function `readl_relaxed':
   drivers/clocksource/timer-tegra186.c:240: undefined reference to `__udivdi3'


vim +24 arch/xtensa/include/uapi/asm/swab.h

8903709b054a8d arch/xtensa/include/asm/swab.h Harvey Harrison 2009-01-07  19  
8903709b054a8d arch/xtensa/include/asm/swab.h Harvey Harrison 2009-01-07  20  static inline __attribute_const__ __u32 __arch_swab32(__u32 x)
8903709b054a8d arch/xtensa/include/asm/swab.h Harvey Harrison 2009-01-07  21  {
8903709b054a8d arch/xtensa/include/asm/swab.h Harvey Harrison 2009-01-07  22      __u32 res;
8903709b054a8d arch/xtensa/include/asm/swab.h Harvey Harrison 2009-01-07  23      /* instruction sequence from Xtensa ISA release 2/2000 */
8903709b054a8d arch/xtensa/include/asm/swab.h Harvey Harrison 2009-01-07 @24      __asm__("ssai     8           \n\t"
8903709b054a8d arch/xtensa/include/asm/swab.h Harvey Harrison 2009-01-07  25  	    "srli     %0, %1, 16  \n\t"
8903709b054a8d arch/xtensa/include/asm/swab.h Harvey Harrison 2009-01-07  26  	    "src      %0, %0, %1  \n\t"
8903709b054a8d arch/xtensa/include/asm/swab.h Harvey Harrison 2009-01-07  27  	    "src      %0, %0, %0  \n\t"
8903709b054a8d arch/xtensa/include/asm/swab.h Harvey Harrison 2009-01-07  28  	    "src      %0, %1, %0  \n"
8903709b054a8d arch/xtensa/include/asm/swab.h Harvey Harrison 2009-01-07  29  	    : "=&a" (res)
8903709b054a8d arch/xtensa/include/asm/swab.h Harvey Harrison 2009-01-07  30  	    : "a" (x)
8903709b054a8d arch/xtensa/include/asm/swab.h Harvey Harrison 2009-01-07  31  	    );
8903709b054a8d arch/xtensa/include/asm/swab.h Harvey Harrison 2009-01-07  32      return res;
8903709b054a8d arch/xtensa/include/asm/swab.h Harvey Harrison 2009-01-07  33  }
8903709b054a8d arch/xtensa/include/asm/swab.h Harvey Harrison 2009-01-07  34  #define __arch_swab32 __arch_swab32
8903709b054a8d arch/xtensa/include/asm/swab.h Harvey Harrison 2009-01-07  35  

:::::: The code at line 24 was first introduced by commit
:::::: 8903709b054a8dafe4e8c6d9a6444034d7aba36f xtensa: introduce swab.h

:::::: TO: Harvey Harrison <harvey.harrison@...il.com>
:::::: CC: Linus Torvalds <torvalds@...ux-foundation.org>

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