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Message-ID: <202507011949.4wad2fIh-lkp@intel.com>
Date: Tue, 1 Jul 2025 20:05:36 +0800
From: kernel test robot <lkp@...el.com>
To: Wander Lairson Costa <wander@...hat.com>,
	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Juri Lelli <juri.lelli@...hat.com>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Dietmar Eggemann <dietmar.eggemann@....com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
	Valentin Schneider <vschneid@...hat.com>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Boqun Feng <boqun.feng@...il.com>,
	David Woodhouse <dwmw@...zon.co.uk>, linux-kernel@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Clark Williams <williams@...hat.com>,
	Gabriele Monaco <gmonaco@...hat.com>
Subject: Re: [PATCH v2 1/2] trace/preemptirq: reduce overhead of
 irq_enable/disable tracepoints

Hi Wander,

kernel test robot noticed the following build errors:

[auto build test ERROR on trace/for-next]
[also build test ERROR on tip/sched/core linus/master v6.16-rc4 next-20250701]
[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/Wander-Lairson-Costa/trace-preemptirq-reduce-overhead-of-irq_enable-disable-tracepoints/20250701-035446
base:   https://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace for-next
patch link:    https://lore.kernel.org/r/20250630195243.701516-2-wander%40redhat.com
patch subject: [PATCH v2 1/2] trace/preemptirq: reduce overhead of irq_enable/disable tracepoints
config: arm-randconfig-004-20250701 (https://download.01.org/0day-ci/archive/20250701/202507011949.4wad2fIh-lkp@intel.com/config)
compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project e04c938cc08a90ae60440ce22d072ebc69d67ee8)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250701/202507011949.4wad2fIh-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/202507011949.4wad2fIh-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from kernel/bounds.c:13:
   In file included from include/linux/log2.h:12:
   In file included from include/linux/bitops.h:68:
   In file included from arch/arm/include/asm/bitops.h:28:
   In file included from include/linux/irqflags.h:20:
   In file included from include/linux/tracepoint-defs.h:11:
   In file included from include/linux/atomic.h:7:
   In file included from arch/arm/include/asm/atomic.h:16:
   In file included from arch/arm/include/asm/cmpxchg.h:124:
   include/asm-generic/cmpxchg-local.h:26:2: error: call to undeclared function 'raw_local_irq_save'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
      26 |         raw_local_irq_save(flags);
         |         ^
   include/asm-generic/cmpxchg-local.h:26:2: note: did you mean 'arch_local_irq_save'?
   arch/arm/include/asm/irqflags.h:72:29: note: 'arch_local_irq_save' declared here
      72 | static inline unsigned long arch_local_irq_save(void)
         |                             ^
   arch/arm/include/asm/irqflags.h:71:29: note: expanded from macro 'arch_local_irq_save'
      71 | #define arch_local_irq_save arch_local_irq_save
         |                             ^
   In file included from kernel/bounds.c:13:
   In file included from include/linux/log2.h:12:
   In file included from include/linux/bitops.h:68:
   In file included from arch/arm/include/asm/bitops.h:28:
   In file included from include/linux/irqflags.h:20:
   In file included from include/linux/tracepoint-defs.h:11:
   In file included from include/linux/atomic.h:7:
   In file included from arch/arm/include/asm/atomic.h:16:
   In file included from arch/arm/include/asm/cmpxchg.h:124:
   include/asm-generic/cmpxchg-local.h:47:2: error: call to undeclared function 'raw_local_irq_restore'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
      47 |         raw_local_irq_restore(flags);
         |         ^
   include/asm-generic/cmpxchg-local.h:47:2: note: did you mean 'arch_local_irq_restore'?
   arch/arm/include/asm/irqflags.h:169:20: note: 'arch_local_irq_restore' declared here
     169 | static inline void arch_local_irq_restore(unsigned long flags)
         |                    ^
   arch/arm/include/asm/irqflags.h:168:32: note: expanded from macro 'arch_local_irq_restore'
     168 | #define arch_local_irq_restore arch_local_irq_restore
         |                                ^
   In file included from kernel/bounds.c:13:
   In file included from include/linux/log2.h:12:
   In file included from include/linux/bitops.h:68:
   In file included from arch/arm/include/asm/bitops.h:28:
   In file included from include/linux/irqflags.h:20:
   In file included from include/linux/tracepoint-defs.h:11:
   In file included from include/linux/atomic.h:7:
   In file included from arch/arm/include/asm/atomic.h:16:
   In file included from arch/arm/include/asm/cmpxchg.h:124:
   include/asm-generic/cmpxchg-local.h:60:2: error: call to undeclared function 'raw_local_irq_save'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
      60 |         raw_local_irq_save(flags);
         |         ^
   include/asm-generic/cmpxchg-local.h:64:2: error: call to undeclared function 'raw_local_irq_restore'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
      64 |         raw_local_irq_restore(flags);
         |         ^
   In file included from kernel/bounds.c:13:
   In file included from include/linux/log2.h:12:
   In file included from include/linux/bitops.h:68:
   In file included from arch/arm/include/asm/bitops.h:28:
   In file included from include/linux/irqflags.h:20:
   In file included from include/linux/tracepoint-defs.h:11:
   In file included from include/linux/atomic.h:7:
   In file included from arch/arm/include/asm/atomic.h:16:
   In file included from arch/arm/include/asm/cmpxchg.h:148:
>> include/asm-generic/cmpxchg.h:33:3: error: call to undeclared function 'local_irq_save'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
      33 |                 local_irq_save(flags);
         |                 ^
>> include/asm-generic/cmpxchg.h:36:3: error: call to undeclared function 'local_irq_restore'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
      36 |                 local_irq_restore(flags);
         |                 ^
   In file included from kernel/bounds.c:13:
   In file included from include/linux/log2.h:12:
   In file included from include/linux/bitops.h:68:
   In file included from arch/arm/include/asm/bitops.h:28:
   In file included from include/linux/irqflags.h:20:
   In file included from include/linux/tracepoint-defs.h:11:
   In file included from include/linux/atomic.h:7:
>> arch/arm/include/asm/atomic.h:215:2: error: call to undeclared function 'raw_local_irq_save'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     215 |         raw_local_irq_save(flags);
         |         ^
>> arch/arm/include/asm/atomic.h:219:2: error: call to undeclared function 'raw_local_irq_restore'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     219 |         raw_local_irq_restore(flags);
         |         ^
   arch/arm/include/asm/atomic.h:232:1: error: call to undeclared function 'raw_local_irq_save'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     232 | ATOMIC_OPS(add, +=, add)
         | ^
   arch/arm/include/asm/atomic.h:228:2: note: expanded from macro 'ATOMIC_OPS'
     228 |         ATOMIC_OP(op, c_op, asm_op)                                     \
         |         ^
   arch/arm/include/asm/atomic.h:167:2: note: expanded from macro 'ATOMIC_OP'
     167 |         raw_local_irq_save(flags);                                      \
         |         ^
   arch/arm/include/asm/atomic.h:232:1: error: call to undeclared function 'raw_local_irq_restore'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   arch/arm/include/asm/atomic.h:228:2: note: expanded from macro 'ATOMIC_OPS'
     228 |         ATOMIC_OP(op, c_op, asm_op)                                     \
         |         ^
   arch/arm/include/asm/atomic.h:169:2: note: expanded from macro 'ATOMIC_OP'
     169 |         raw_local_irq_restore(flags);                                   \
         |         ^
   arch/arm/include/asm/atomic.h:232:1: error: call to undeclared function 'raw_local_irq_save'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   arch/arm/include/asm/atomic.h:229:2: note: expanded from macro 'ATOMIC_OPS'
     229 |         ATOMIC_OP_RETURN(op, c_op, asm_op)                              \
         |         ^
   arch/arm/include/asm/atomic.h:178:2: note: expanded from macro 'ATOMIC_OP_RETURN'
     178 |         raw_local_irq_save(flags);                                      \
         |         ^
   arch/arm/include/asm/atomic.h:232:1: error: call to undeclared function 'raw_local_irq_restore'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   arch/arm/include/asm/atomic.h:229:2: note: expanded from macro 'ATOMIC_OPS'
     229 |         ATOMIC_OP_RETURN(op, c_op, asm_op)                              \
         |         ^
   arch/arm/include/asm/atomic.h:181:2: note: expanded from macro 'ATOMIC_OP_RETURN'
     181 |         raw_local_irq_restore(flags);                                   \
         |         ^
   arch/arm/include/asm/atomic.h:232:1: error: call to undeclared function 'raw_local_irq_save'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   arch/arm/include/asm/atomic.h:230:2: note: expanded from macro 'ATOMIC_OPS'
     230 |         ATOMIC_FETCH_OP(op, c_op, asm_op)
         |         ^
   arch/arm/include/asm/atomic.h:192:2: note: expanded from macro 'ATOMIC_FETCH_OP'
     192 |         raw_local_irq_save(flags);                                      \
         |         ^
   arch/arm/include/asm/atomic.h:232:1: error: call to undeclared function 'raw_local_irq_restore'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   arch/arm/include/asm/atomic.h:230:2: note: expanded from macro 'ATOMIC_OPS'
     230 |         ATOMIC_FETCH_OP(op, c_op, asm_op)
         |         ^
   arch/arm/include/asm/atomic.h:195:2: note: expanded from macro 'ATOMIC_FETCH_OP'
     195 |         raw_local_irq_restore(flags);                                   \
         |         ^
   arch/arm/include/asm/atomic.h:233:1: error: call to undeclared function 'raw_local_irq_save'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     233 | ATOMIC_OPS(sub, -=, sub)
         | ^
   arch/arm/include/asm/atomic.h:228:2: note: expanded from macro 'ATOMIC_OPS'
     228 |         ATOMIC_OP(op, c_op, asm_op)                                     \
         |         ^
   arch/arm/include/asm/atomic.h:167:2: note: expanded from macro 'ATOMIC_OP'
     167 |         raw_local_irq_save(flags);                                      \
         |         ^
   arch/arm/include/asm/atomic.h:233:1: error: call to undeclared function 'raw_local_irq_restore'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   arch/arm/include/asm/atomic.h:228:2: note: expanded from macro 'ATOMIC_OPS'
     228 |         ATOMIC_OP(op, c_op, asm_op)                                     \
         |         ^
   arch/arm/include/asm/atomic.h:169:2: note: expanded from macro 'ATOMIC_OP'
     169 |         raw_local_irq_restore(flags);                                   \
         |         ^
   arch/arm/include/asm/atomic.h:233:1: error: call to undeclared function 'raw_local_irq_save'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   arch/arm/include/asm/atomic.h:229:2: note: expanded from macro 'ATOMIC_OPS'
     229 |         ATOMIC_OP_RETURN(op, c_op, asm_op)                              \
         |         ^
   arch/arm/include/asm/atomic.h:178:2: note: expanded from macro 'ATOMIC_OP_RETURN'
     178 |         raw_local_irq_save(flags);                                      \
         |         ^
   arch/arm/include/asm/atomic.h:233:1: error: call to undeclared function 'raw_local_irq_restore'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   arch/arm/include/asm/atomic.h:229:2: note: expanded from macro 'ATOMIC_OPS'
     229 |         ATOMIC_OP_RETURN(op, c_op, asm_op)                              \
         |         ^
   arch/arm/include/asm/atomic.h:181:2: note: expanded from macro 'ATOMIC_OP_RETURN'
     181 |         raw_local_irq_restore(flags);                                   \
         |         ^
   arch/arm/include/asm/atomic.h:233:1: error: call to undeclared function 'raw_local_irq_save'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   arch/arm/include/asm/atomic.h:230:2: note: expanded from macro 'ATOMIC_OPS'
     230 |         ATOMIC_FETCH_OP(op, c_op, asm_op)
         |         ^
   arch/arm/include/asm/atomic.h:192:2: note: expanded from macro 'ATOMIC_FETCH_OP'
     192 |         raw_local_irq_save(flags);                                      \
         |         ^
   fatal error: too many errors emitted, stopping now [-ferror-limit=]
   20 errors generated.
   make[3]: *** [scripts/Makefile.build:98: kernel/bounds.s] Error 1 shuffle=3679043308
   make[3]: Target 'prepare' not remade because of errors.
   make[2]: *** [Makefile:1274: prepare0] Error 2 shuffle=3679043308
   make[2]: Target 'prepare' not remade because of errors.
   make[1]: *** [Makefile:248: __sub-make] Error 2 shuffle=3679043308
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:248: __sub-make] Error 2 shuffle=3679043308
   make: Target 'prepare' not remade because of errors.


vim +/local_irq_save +33 include/asm-generic/cmpxchg.h

b4816afa398670 David Howells 2012-03-28  22  
b4816afa398670 David Howells 2012-03-28  23  static inline
82b993e8249ae3 Mark Rutland  2021-05-25  24  unsigned long __generic_xchg(unsigned long x, volatile void *ptr, int size)
b4816afa398670 David Howells 2012-03-28  25  {
b4816afa398670 David Howells 2012-03-28  26  	unsigned long ret, flags;
b4816afa398670 David Howells 2012-03-28  27  
b4816afa398670 David Howells 2012-03-28  28  	switch (size) {
b4816afa398670 David Howells 2012-03-28  29  	case 1:
b4816afa398670 David Howells 2012-03-28  30  #ifdef __xchg_u8
b4816afa398670 David Howells 2012-03-28  31  		return __xchg_u8(x, ptr);
b4816afa398670 David Howells 2012-03-28  32  #else
b4816afa398670 David Howells 2012-03-28 @33  		local_irq_save(flags);
b4816afa398670 David Howells 2012-03-28  34  		ret = *(volatile u8 *)ptr;
656e9007ef5862 Arnd Bergmann 2023-03-02  35  		*(volatile u8 *)ptr = (x & 0xffu);
b4816afa398670 David Howells 2012-03-28 @36  		local_irq_restore(flags);
b4816afa398670 David Howells 2012-03-28  37  		return ret;
b4816afa398670 David Howells 2012-03-28  38  #endif /* __xchg_u8 */
b4816afa398670 David Howells 2012-03-28  39  
b4816afa398670 David Howells 2012-03-28  40  	case 2:
b4816afa398670 David Howells 2012-03-28  41  #ifdef __xchg_u16
b4816afa398670 David Howells 2012-03-28  42  		return __xchg_u16(x, ptr);
b4816afa398670 David Howells 2012-03-28  43  #else
b4816afa398670 David Howells 2012-03-28  44  		local_irq_save(flags);
b4816afa398670 David Howells 2012-03-28  45  		ret = *(volatile u16 *)ptr;
656e9007ef5862 Arnd Bergmann 2023-03-02  46  		*(volatile u16 *)ptr = (x & 0xffffu);
b4816afa398670 David Howells 2012-03-28  47  		local_irq_restore(flags);
b4816afa398670 David Howells 2012-03-28  48  		return ret;
b4816afa398670 David Howells 2012-03-28  49  #endif /* __xchg_u16 */
b4816afa398670 David Howells 2012-03-28  50  
b4816afa398670 David Howells 2012-03-28  51  	case 4:
b4816afa398670 David Howells 2012-03-28  52  #ifdef __xchg_u32
b4816afa398670 David Howells 2012-03-28  53  		return __xchg_u32(x, ptr);
b4816afa398670 David Howells 2012-03-28  54  #else
b4816afa398670 David Howells 2012-03-28  55  		local_irq_save(flags);
b4816afa398670 David Howells 2012-03-28  56  		ret = *(volatile u32 *)ptr;
656e9007ef5862 Arnd Bergmann 2023-03-02  57  		*(volatile u32 *)ptr = (x & 0xffffffffu);
b4816afa398670 David Howells 2012-03-28  58  		local_irq_restore(flags);
b4816afa398670 David Howells 2012-03-28  59  		return ret;
b4816afa398670 David Howells 2012-03-28  60  #endif /* __xchg_u32 */
b4816afa398670 David Howells 2012-03-28  61  

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