linux-kernel - Re: [PATCH v2 2/3] riscv: introduce percpu.h into include/asm

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Message-ID: <202512091137.3Qw1dX94-lkp@intel.com>
Date: Tue, 9 Dec 2025 11:55:54 +0800
From: kernel test robot <lkp@...el.com>
To: Yunhui Cui <cuiyunhui@...edance.com>, aou@...s.berkeley.edu,
	alex@...ti.fr, andii@...nel.org, andybnac@...il.com,
	apatel@...tanamicro.com, ast@...nel.org, ben.dooks@...ethink.co.uk,
	bjorn@...nel.org, bpf@...r.kernel.org, charlie@...osinc.com,
	cl@...two.org, conor.dooley@...rochip.com, cyrilbur@...storrent.com,
	daniel@...earbox.net, debug@...osinc.com, dennis@...nel.org,
	eddyz87@...il.com, haoluo@...gle.com, john.fastabend@...il.com,
	jolsa@...nel.org, kpsingh@...nel.org, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, linux-riscv@...ts.infradead.org,
	linux@...musvillemoes.dk, martin.lau@...ux.dev, palmer@...belt.com,
	pjw@...nel.org, puranjay@...nel.org
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev
Subject: Re: [PATCH v2 2/3] riscv: introduce percpu.h into include/asm

Hi Yunhui,

kernel test robot noticed the following build errors:

[auto build test ERROR on linus/master]
[also build test ERROR on v6.18 next-20251209]
[cannot apply to bpf-next/net bpf-next/master bpf/master]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Yunhui-Cui/riscv-remove-irqflags-h-inclusion-in-asm-bitops-h/20251208-115407
base:   linus/master
patch link:    https://lore.kernel.org/r/20251208034944.73113-3-cuiyunhui%40bytedance.com
patch subject: [PATCH v2 2/3] riscv: introduce percpu.h into include/asm
config: riscv-randconfig-002-20251209 (https://download.01.org/0day-ci/archive/20251209/202512091137.3Qw1dX94-lkp@intel.com/config)
compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251209/202512091137.3Qw1dX94-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/202512091137.3Qw1dX94-lkp@intel.com/

All errors (new ones prefixed by >>):

>> mm/slub.c:4380:9: error: call to undeclared function 'arch_cmpxchg128_local'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    4380 |         return this_cpu_try_cmpxchg_freelist(s->cpu_slab->freelist_tid,
         |                ^
   mm/slab.h:24:39: note: expanded from macro 'this_cpu_try_cmpxchg_freelist'
      24 | #define this_cpu_try_cmpxchg_freelist   this_cpu_try_cmpxchg128
         |                                         ^
   include/asm-generic/percpu.h:529:47: note: expanded from macro 'this_cpu_try_cmpxchg128'
     529 |         __cpu_fallback_try_cmpxchg(pcp, ovalp, nval, this_cpu_cmpxchg128)
         |                                                      ^
   1 error generated.


vim +/arch_cmpxchg128_local +4380 mm/slub.c

0b303fb402862d Vlastimil Babka 2021-05-08  4371  
6801be4f2653e5 Peter Zijlstra  2023-05-31  4372  static inline bool
6801be4f2653e5 Peter Zijlstra  2023-05-31  4373  __update_cpu_freelist_fast(struct kmem_cache *s,
6801be4f2653e5 Peter Zijlstra  2023-05-31  4374  			   void *freelist_old, void *freelist_new,
6801be4f2653e5 Peter Zijlstra  2023-05-31  4375  			   unsigned long tid)
6801be4f2653e5 Peter Zijlstra  2023-05-31  4376  {
b244358e9a1cd6 Vlastimil Babka 2025-11-07  4377  	struct freelist_tid old = { .freelist = freelist_old, .tid = tid };
b244358e9a1cd6 Vlastimil Babka 2025-11-07  4378  	struct freelist_tid new = { .freelist = freelist_new, .tid = next_tid(tid) };
6801be4f2653e5 Peter Zijlstra  2023-05-31  4379  
b244358e9a1cd6 Vlastimil Babka 2025-11-07 @4380  	return this_cpu_try_cmpxchg_freelist(s->cpu_slab->freelist_tid,
b244358e9a1cd6 Vlastimil Babka 2025-11-07  4381  					     &old.freelist_tid, new.freelist_tid);
6801be4f2653e5 Peter Zijlstra  2023-05-31  4382  }
6801be4f2653e5 Peter Zijlstra  2023-05-31  4383  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki