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Message-ID: <202511201828.xfphUVkJ-lkp@intel.com>
Date: Thu, 20 Nov 2025 18:37:12 +0800
From: kernel test robot <lkp@...el.com>
To: George Guo <dongtai.guo@...ux.dev>, Huacai Chen <chenhuacai@...nel.org>,
WANG Xuerui <kernel@...0n.name>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
loongarch@...ts.linux.dev, linux-kernel@...r.kernel.org,
George Guo <dongtai.guo@...ux.dev>
Subject: Re: [PATCH 2/2] LoongArch: Enable 128-bit atomics cmpxchg support
Hi George,
kernel test robot noticed the following build errors:
[auto build test ERROR on 8b690556d8fe074b4f9835075050fba3fb180e93]
url: https://github.com/intel-lab-lkp/linux/commits/George-Guo/LoongArch-Add-128-bit-atomic-cmpxchg-support/20251120-160152
base: 8b690556d8fe074b4f9835075050fba3fb180e93
patch link: https://lore.kernel.org/r/20251120-2-v1-2-705bdc440550%40linux.dev
patch subject: [PATCH 2/2] LoongArch: Enable 128-bit atomics cmpxchg support
config: loongarch-allnoconfig (https://download.01.org/0day-ci/archive/20251120/202511201828.xfphUVkJ-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 9e9fe08b16ea2c4d9867fb4974edf2a3776d6ece)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251120/202511201828.xfphUVkJ-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/202511201828.xfphUVkJ-lkp@intel.com/
All errors (new ones prefixed by >>):
>> mm/slub.c:766:9: error: immediate must be a multiple of 4 in the range [-32768, 32764]
766 | return try_cmpxchg_freelist(&slab->freelist_counter.full, &old.full, new.full);
| ^
mm/slab.h:22:32: note: expanded from macro 'try_cmpxchg_freelist'
22 | # define try_cmpxchg_freelist try_cmpxchg128
| ^
include/linux/atomic/atomic-instrumented.h:4956:2: note: expanded from macro 'try_cmpxchg128'
4956 | raw_try_cmpxchg128(__ai_ptr, __ai_oldp, __VA_ARGS__); \
| ^
include/linux/atomic/atomic-arch-fallback.h:326:9: note: expanded from macro 'raw_try_cmpxchg128'
326 | ___r = raw_cmpxchg128((_ptr), ___o, (_new)); \
| ^
include/linux/atomic/atomic-arch-fallback.h:141:24: note: expanded from macro 'raw_cmpxchg128'
141 | #define raw_cmpxchg128 arch_cmpxchg128
| ^
arch/loongarch/include/asm/cmpxchg.h:244:2: note: expanded from macro 'arch_cmpxchg128'
244 | __cmpxchg128_asm("ll.d", "sc.d", ptr, o, n); \
| ^
arch/loongarch/include/asm/cmpxchg.h:137:3: note: expanded from macro '__cmpxchg128_asm'
137 | " " st " $t0, $t1, %2 \n" \
| ^
<inline asm>:7:23: note: instantiated into assembly here
7 | sc.d $t0, $t1, $a2, 0
| ^
>> mm/slub.c:766:9: error: immediate must be a multiple of 4 in the range [-32768, 32764]
766 | return try_cmpxchg_freelist(&slab->freelist_counter.full, &old.full, new.full);
| ^
mm/slab.h:22:32: note: expanded from macro 'try_cmpxchg_freelist'
22 | # define try_cmpxchg_freelist try_cmpxchg128
| ^
include/linux/atomic/atomic-instrumented.h:4956:2: note: expanded from macro 'try_cmpxchg128'
4956 | raw_try_cmpxchg128(__ai_ptr, __ai_oldp, __VA_ARGS__); \
| ^
include/linux/atomic/atomic-arch-fallback.h:326:9: note: expanded from macro 'raw_try_cmpxchg128'
326 | ___r = raw_cmpxchg128((_ptr), ___o, (_new)); \
| ^
include/linux/atomic/atomic-arch-fallback.h:141:24: note: expanded from macro 'raw_cmpxchg128'
141 | #define raw_cmpxchg128 arch_cmpxchg128
| ^
arch/loongarch/include/asm/cmpxchg.h:244:2: note: expanded from macro 'arch_cmpxchg128'
244 | __cmpxchg128_asm("ll.d", "sc.d", ptr, o, n); \
| ^
arch/loongarch/include/asm/cmpxchg.h:137:3: note: expanded from macro '__cmpxchg128_asm'
137 | " " st " $t0, $t1, %2 \n" \
| ^
<inline asm>:7:23: note: instantiated into assembly here
7 | sc.d $t0, $t1, $a3, 0
| ^
>> mm/slub.c:766:9: error: immediate must be a multiple of 4 in the range [-32768, 32764]
766 | return try_cmpxchg_freelist(&slab->freelist_counter.full, &old.full, new.full);
| ^
mm/slab.h:22:32: note: expanded from macro 'try_cmpxchg_freelist'
22 | # define try_cmpxchg_freelist try_cmpxchg128
| ^
include/linux/atomic/atomic-instrumented.h:4956:2: note: expanded from macro 'try_cmpxchg128'
4956 | raw_try_cmpxchg128(__ai_ptr, __ai_oldp, __VA_ARGS__); \
| ^
include/linux/atomic/atomic-arch-fallback.h:326:9: note: expanded from macro 'raw_try_cmpxchg128'
326 | ___r = raw_cmpxchg128((_ptr), ___o, (_new)); \
| ^
include/linux/atomic/atomic-arch-fallback.h:141:24: note: expanded from macro 'raw_cmpxchg128'
141 | #define raw_cmpxchg128 arch_cmpxchg128
| ^
arch/loongarch/include/asm/cmpxchg.h:244:2: note: expanded from macro 'arch_cmpxchg128'
244 | __cmpxchg128_asm("ll.d", "sc.d", ptr, o, n); \
| ^
arch/loongarch/include/asm/cmpxchg.h:137:3: note: expanded from macro '__cmpxchg128_asm'
137 | " " st " $t0, $t1, %2 \n" \
| ^
<inline asm>:7:23: note: instantiated into assembly here
7 | sc.d $t0, $t1, $a5, 0
| ^
>> mm/slub.c:766:9: error: immediate must be a multiple of 4 in the range [-32768, 32764]
766 | return try_cmpxchg_freelist(&slab->freelist_counter.full, &old.full, new.full);
| ^
mm/slab.h:22:32: note: expanded from macro 'try_cmpxchg_freelist'
22 | # define try_cmpxchg_freelist try_cmpxchg128
| ^
include/linux/atomic/atomic-instrumented.h:4956:2: note: expanded from macro 'try_cmpxchg128'
4956 | raw_try_cmpxchg128(__ai_ptr, __ai_oldp, __VA_ARGS__); \
| ^
include/linux/atomic/atomic-arch-fallback.h:326:9: note: expanded from macro 'raw_try_cmpxchg128'
326 | ___r = raw_cmpxchg128((_ptr), ___o, (_new)); \
| ^
include/linux/atomic/atomic-arch-fallback.h:141:24: note: expanded from macro 'raw_cmpxchg128'
141 | #define raw_cmpxchg128 arch_cmpxchg128
| ^
arch/loongarch/include/asm/cmpxchg.h:244:2: note: expanded from macro 'arch_cmpxchg128'
244 | __cmpxchg128_asm("ll.d", "sc.d", ptr, o, n); \
| ^
arch/loongarch/include/asm/cmpxchg.h:137:3: note: expanded from macro '__cmpxchg128_asm'
137 | " " st " $t0, $t1, %2 \n" \
| ^
<inline asm>:7:23: note: instantiated into assembly here
7 | sc.d $t0, $t1, $t3, 0
| ^
4 errors generated.
vim +766 mm/slub.c
881db7fb03a77a Christoph Lameter 2011-06-01 756
6801be4f2653e5 Peter Zijlstra 2023-05-31 757 static inline bool
6801be4f2653e5 Peter Zijlstra 2023-05-31 758 __update_freelist_fast(struct slab *slab,
6801be4f2653e5 Peter Zijlstra 2023-05-31 759 void *freelist_old, unsigned long counters_old,
6801be4f2653e5 Peter Zijlstra 2023-05-31 760 void *freelist_new, unsigned long counters_new)
6801be4f2653e5 Peter Zijlstra 2023-05-31 761 {
6801be4f2653e5 Peter Zijlstra 2023-05-31 762 #ifdef system_has_freelist_aba
6801be4f2653e5 Peter Zijlstra 2023-05-31 763 freelist_aba_t old = { .freelist = freelist_old, .counter = counters_old };
6801be4f2653e5 Peter Zijlstra 2023-05-31 764 freelist_aba_t new = { .freelist = freelist_new, .counter = counters_new };
6801be4f2653e5 Peter Zijlstra 2023-05-31 765
6801be4f2653e5 Peter Zijlstra 2023-05-31 @766 return try_cmpxchg_freelist(&slab->freelist_counter.full, &old.full, new.full);
6801be4f2653e5 Peter Zijlstra 2023-05-31 767 #else
6801be4f2653e5 Peter Zijlstra 2023-05-31 768 return false;
6801be4f2653e5 Peter Zijlstra 2023-05-31 769 #endif
6801be4f2653e5 Peter Zijlstra 2023-05-31 770 }
6801be4f2653e5 Peter Zijlstra 2023-05-31 771
--
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