From: kernel test robot <lkp@intel.com>
To: Huacai Chen <chenhuacai@loongson.cn>
Cc: oe-kbuild-all@lists.linux.dev
Subject: [chenhuacai-loongson:loongarch-next 9/22] arch/loongarch/include/asm/numa.h:17:48: warning: left shift count >= width of type
Date: Sat, 24 Oct 2026 08:03:32 +0800 [thread overview]
Message-ID: <202610240732.2HGud7k8-lkp@intel.com> (raw)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson.git loongarch-next
head: ce668200313df40f8c74752b9601a3a85def24f5
commit: 9c04d06741cd87a9e18cafff1cfeff8c5ff6727a [9/22] LoongArch: Use pa_to_nid()/nid_to_addrbase() rather than hard-code
config: loongarch-randconfig-1001-20261023 (https://download.01.org/0day-ci/archive/20261024/202610240732.2HGud7k8-lkp@intel.com/config)
compiler: loongarch64-linux-gcc (GCC) 16.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261024/202610240732.2HGud7k8-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202610240732.2HGud7k8-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from arch/loongarch/pci/pci.c:15:
arch/loongarch/pci/pci.c: In function 'mcfg_addr_init':
>> arch/loongarch/include/asm/numa.h:17:48: warning: left shift count >= width of type [-Wshift-count-overflow]
17 | #define nid_to_addrbase(nid) (_ULCAST_(nid) << NODE_ADDRSPACE_SHIFT)
| ^~
arch/loongarch/pci/pci.c:47:17: note: in expansion of macro 'nid_to_addrbase'
47 | return (nid_to_addrbase(node) | MCFG_EXT_PCICFG_BASE);
| ^~~~~~~~~~~~~~~
>> arch/loongarch/pci/pci.c:47:39: warning: conversion from 'long long unsigned int' to 'phys_addr_t' {aka 'unsigned int'} changes value from '16484084482048' to '0' [-Woverflow]
47 | return (nid_to_addrbase(node) | MCFG_EXT_PCICFG_BASE);
| ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
vim +17 arch/loongarch/include/asm/numa.h
d4b6f1562a3c32 Huacai Chen 2022-05-31 15
d4b6f1562a3c32 Huacai Chen 2022-05-31 16 #define pa_to_nid(addr) (((addr) & 0xf00000000000) >> NODE_ADDRSPACE_SHIFT)
d4b6f1562a3c32 Huacai Chen 2022-05-31 @17 #define nid_to_addrbase(nid) (_ULCAST_(nid) << NODE_ADDRSPACE_SHIFT)
d4b6f1562a3c32 Huacai Chen 2022-05-31 18
:::::: The code at line 17 was first introduced by commit
:::::: d4b6f1562a3c3284adcef81d6e4f183d7d34b8a9 LoongArch: Add Non-Uniform Memory Access (NUMA) support
:::::: TO: Huacai Chen <chenhuacai@loongson.cn>
:::::: CC: Huacai Chen <chenhuacai@loongson.cn>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
reply other threads:[~2026-10-24 0:04 UTC|newest]
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