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Message-ID: <202512202218.FI6bB5kV-lkp@intel.com>
Date: Sat, 20 Dec 2025 22:45:45 +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 v3 2/3] riscv: introduce percpu.h into include/asm
Hi Yunhui,
kernel test robot noticed the following build warnings:
[auto build test WARNING on linus/master]
[also build test WARNING on v6.19-rc1 next-20251219]
[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/20251216-094956
base: linus/master
patch link: https://lore.kernel.org/r/20251216014721.42262-3-cuiyunhui%40bytedance.com
patch subject: [PATCH v3 2/3] riscv: introduce percpu.h into include/asm
config: riscv-randconfig-002-20251217 (https://download.01.org/0day-ci/archive/20251220/202512202218.FI6bB5kV-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/20251220/202512202218.FI6bB5kV-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/202512202218.FI6bB5kV-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:12:
In file included from arch/riscv/include/asm/io.h:140:
include/asm-generic/io.h:846:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
846 | insw(addr, buffer, count);
| ^~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:109:53: note: expanded from macro 'insw'
109 | #define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
| ~~~~~~~~~~ ^
In file included from mm/slub.c:14:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:13:
In file included from include/linux/cgroup.h:27:
In file included from include/linux/kernel_stat.h:8:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:12:
In file included from arch/riscv/include/asm/io.h:140:
include/asm-generic/io.h:854:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
854 | insl(addr, buffer, count);
| ^~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:110:53: note: expanded from macro 'insl'
110 | #define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
| ~~~~~~~~~~ ^
In file included from mm/slub.c:14:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:13:
In file included from include/linux/cgroup.h:27:
In file included from include/linux/kernel_stat.h:8:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:12:
In file included from arch/riscv/include/asm/io.h:140:
include/asm-generic/io.h:863:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
863 | outsb(addr, buffer, count);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:122:55: note: expanded from macro 'outsb'
122 | #define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
| ~~~~~~~~~~ ^
In file included from mm/slub.c:14:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:13:
In file included from include/linux/cgroup.h:27:
In file included from include/linux/kernel_stat.h:8:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:12:
In file included from arch/riscv/include/asm/io.h:140:
include/asm-generic/io.h:872:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
872 | outsw(addr, buffer, count);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:123:55: note: expanded from macro 'outsw'
123 | #define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
| ~~~~~~~~~~ ^
In file included from mm/slub.c:14:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:13:
In file included from include/linux/cgroup.h:27:
In file included from include/linux/kernel_stat.h:8:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:12:
In file included from arch/riscv/include/asm/io.h:140:
include/asm-generic/io.h:881:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
881 | outsl(addr, buffer, count);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:124:55: note: expanded from macro 'outsl'
124 | #define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
| ~~~~~~~~~~ ^
In file included from mm/slub.c:14:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:13:
In file included from include/linux/cgroup.h:27:
In file included from include/linux/kernel_stat.h:8:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:12:
In file included from arch/riscv/include/asm/io.h:140:
include/asm-generic/io.h:1209:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
1209 | return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
| ~~~~~~~~~~ ^
>> mm/slub.c:4385:9: warning: variable '__old' is uninitialized when used within its own initialization [-Wuninitialized]
4385 | return this_cpu_try_cmpxchg_freelist(s->cpu_slab->freelist_tid,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4386 | &old.freelist_tid, new.freelist_tid);
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mm/slab.h:31:39: note: expanded from macro 'this_cpu_try_cmpxchg_freelist'
31 | #define this_cpu_try_cmpxchg_freelist this_cpu_try_cmpxchg64
| ^
include/asm-generic/percpu.h:520:2: note: expanded from macro 'this_cpu_try_cmpxchg64'
520 | __cpu_fallback_try_cmpxchg(pcp, ovalp, nval, this_cpu_cmpxchg64)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/asm-generic/percpu.h:110:24: note: expanded from macro '__cpu_fallback_try_cmpxchg'
110 | __val = _cmpxchg(pcp, __old, nval); \
| ~~~~~~~~~~~~~~^~~~~~~~~~~~
note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/atomic/atomic-instrumented.h:4810:32: note: expanded from macro 'cmpxchg_relaxed'
4810 | raw_cmpxchg_relaxed(__ai_ptr, __VA_ARGS__); \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
arch/riscv/include/asm/cmpxchg.h:265:24: note: expanded from macro 'arch_cmpxchg_relaxed'
265 | _arch_cmpxchg((ptr), (o), (n), \
| ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
266 | SC_SFX(""), CAS_SFX(""), \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
267 | SC_PREPEND(""), SC_APPEND(""), \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
268 | CAS_PREPEND(""), CAS_APPEND(""))
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/cmpxchg.h:218:32: note: expanded from macro '_arch_cmpxchg'
218 | __typeof__(*(__ptr)) __old = (old); \
| ~~~~~ ^~~
mm/slub.c:4385:9: error: instruction requires the following: RV64I Base Instruction Set
mm/slab.h:31:39: note: expanded from macro 'this_cpu_try_cmpxchg_freelist'
31 | #define this_cpu_try_cmpxchg_freelist this_cpu_try_cmpxchg64
| ^
include/asm-generic/percpu.h:520:47: note: expanded from macro 'this_cpu_try_cmpxchg64'
520 | __cpu_fallback_try_cmpxchg(pcp, ovalp, nval, this_cpu_cmpxchg64)
| ^
<inline asm>:1:5: note: instantiated into assembly here
1 | 0: lr.d s9, 0(a1)
| ^
mm/slub.c:4385:9: error: instruction requires the following: RV64I Base Instruction Set
4385 | return this_cpu_try_cmpxchg_freelist(s->cpu_slab->freelist_tid,
| ^
mm/slab.h:31:39: note: expanded from macro 'this_cpu_try_cmpxchg_freelist'
31 | #define this_cpu_try_cmpxchg_freelist this_cpu_try_cmpxchg64
| ^
include/asm-generic/percpu.h:520:47: note: expanded from macro 'this_cpu_try_cmpxchg64'
520 | __cpu_fallback_try_cmpxchg(pcp, ovalp, nval, this_cpu_cmpxchg64)
| ^
<inline asm>:3:2: note: instantiated into assembly here
3 | sc.d a3, a0, 0(a1)
| ^
mm/slub.c:4385:9: error: instruction requires the following: RV64I Base Instruction Set
4385 | return this_cpu_try_cmpxchg_freelist(s->cpu_slab->freelist_tid,
| ^
mm/slab.h:31:39: note: expanded from macro 'this_cpu_try_cmpxchg_freelist'
31 | #define this_cpu_try_cmpxchg_freelist this_cpu_try_cmpxchg64
| ^
include/asm-generic/percpu.h:520:47: note: expanded from macro 'this_cpu_try_cmpxchg64'
520 | __cpu_fallback_try_cmpxchg(pcp, ovalp, nval, this_cpu_cmpxchg64)
| ^
<inline asm>:1:5: note: instantiated into assembly here
1 | 0: lr.d s9, 0(a1)
| ^
mm/slub.c:4385:9: error: instruction requires the following: RV64I Base Instruction Set
4385 | return this_cpu_try_cmpxchg_freelist(s->cpu_slab->freelist_tid,
| ^
mm/slab.h:31:39: note: expanded from macro 'this_cpu_try_cmpxchg_freelist'
31 | #define this_cpu_try_cmpxchg_freelist this_cpu_try_cmpxchg64
| ^
include/asm-generic/percpu.h:520:47: note: expanded from macro 'this_cpu_try_cmpxchg64'
520 | __cpu_fallback_try_cmpxchg(pcp, ovalp, nval, this_cpu_cmpxchg64)
| ^
<inline asm>:3:2: note: instantiated into assembly here
3 | sc.d a3, a0, 0(a1)
| ^
mm/slub.c:4385:9: error: instruction requires the following: RV64I Base Instruction Set
4385 | return this_cpu_try_cmpxchg_freelist(s->cpu_slab->freelist_tid,
| ^
mm/slab.h:31:39: note: expanded from macro 'this_cpu_try_cmpxchg_freelist'
31 | #define this_cpu_try_cmpxchg_freelist this_cpu_try_cmpxchg64
| ^
include/asm-generic/percpu.h:520:47: note: expanded from macro 'this_cpu_try_cmpxchg64'
520 | __cpu_fallback_try_cmpxchg(pcp, ovalp, nval, this_cpu_cmpxchg64)
| ^
<inline asm>:1:5: note: instantiated into assembly here
1 | 0: lr.d s10, 0(a1)
| ^
mm/slub.c:4385:9: error: instruction requires the following: RV64I Base Instruction Set
4385 | return this_cpu_try_cmpxchg_freelist(s->cpu_slab->freelist_tid,
| ^
mm/slab.h:31:39: note: expanded from macro 'this_cpu_try_cmpxchg_freelist'
31 | #define this_cpu_try_cmpxchg_freelist this_cpu_try_cmpxchg64
| ^
include/asm-generic/percpu.h:520:47: note: expanded from macro 'this_cpu_try_cmpxchg64'
520 | __cpu_fallback_try_cmpxchg(pcp, ovalp, nval, this_cpu_cmpxchg64)
| ^
<inline asm>:3:2: note: instantiated into assembly here
3 | sc.d a3, a0, 0(a1)
| ^
mm/slub.c:4385:9: error: instruction requires the following: RV64I Base Instruction Set
vim +/__old +4385 mm/slub.c
0b303fb402862d Vlastimil Babka 2021-05-08 4376
6801be4f2653e5 Peter Zijlstra 2023-05-31 4377 static inline bool
6801be4f2653e5 Peter Zijlstra 2023-05-31 4378 __update_cpu_freelist_fast(struct kmem_cache *s,
6801be4f2653e5 Peter Zijlstra 2023-05-31 4379 void *freelist_old, void *freelist_new,
6801be4f2653e5 Peter Zijlstra 2023-05-31 4380 unsigned long tid)
6801be4f2653e5 Peter Zijlstra 2023-05-31 4381 {
b244358e9a1cd6 Vlastimil Babka 2025-11-07 4382 struct freelist_tid old = { .freelist = freelist_old, .tid = tid };
b244358e9a1cd6 Vlastimil Babka 2025-11-07 4383 struct freelist_tid new = { .freelist = freelist_new, .tid = next_tid(tid) };
6801be4f2653e5 Peter Zijlstra 2023-05-31 4384
b244358e9a1cd6 Vlastimil Babka 2025-11-07 @4385 return this_cpu_try_cmpxchg_freelist(s->cpu_slab->freelist_tid,
b244358e9a1cd6 Vlastimil Babka 2025-11-07 4386 &old.freelist_tid, new.freelist_tid);
6801be4f2653e5 Peter Zijlstra 2023-05-31 4387 }
6801be4f2653e5 Peter Zijlstra 2023-05-31 4388
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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