[linyunsheng:net-pp-inflight-fix_v3 3/3] include/linux/atomic/atomic-arch-fallback.h:846:16: sparse: sparse: constant integer operation overflow

[kernel test robot <lkp@intel.com>]

:::::: 
:::::: Manual check reason: "low confidence static check first_new_problem: include/linux/atomic/atomic-arch-fallback.h:846:16: sparse: sparse: constant integer operation overflow"
:::::: 

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
TO: Yunsheng Lin <linyunsheng@huawei.com>

tree:   https://github.com/gestionlin/linux.git net-pp-inflight-fix_v3
head:   bd72d37cdf0449e8175e573706b55a1b5186287a
commit: bd72d37cdf0449e8175e573706b55a1b5186287a [3/3] page_pool: fix IOMMU crash when driver has already unbound
:::::: branch date: 24 hours ago
:::::: commit date: 24 hours ago
config: x86_64-randconfig-121-20241008 (https://download.01.org/0day-ci/archive/20241008/202410082056.oGrW6vdm-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/20241008/202410082056.oGrW6vdm-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/r/202410082056.oGrW6vdm-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   net/core/page_pool.c: note: in included file (through include/linux/atomic.h, arch/x86/include/asm/thread_info.h, include/linux/thread_info.h, ...):
>> include/linux/atomic/atomic-arch-fallback.h:846:16: sparse: sparse: constant integer operation overflow
>> include/linux/atomic/atomic-arch-fallback.h:846:16: sparse: sparse: constant integer operation overflow

vim +846 include/linux/atomic/atomic-arch-fallback.h

37f8173dd84936 include/linux/atomic-arch-fallback.h        Peter Zijlstra 2020-01-24  825  
ad8110706f3811 include/linux/atomic/atomic-arch-fallback.h Mark Rutland   2023-06-05  826  /**
ad8110706f3811 include/linux/atomic/atomic-arch-fallback.h Mark Rutland   2023-06-05  827   * raw_atomic_sub_return_release() - atomic subtract with release ordering
ad8110706f3811 include/linux/atomic/atomic-arch-fallback.h Mark Rutland   2023-06-05  828   * @i: int value to subtract
ad8110706f3811 include/linux/atomic/atomic-arch-fallback.h Mark Rutland   2023-06-05  829   * @v: pointer to atomic_t
ad8110706f3811 include/linux/atomic/atomic-arch-fallback.h Mark Rutland   2023-06-05  830   *
ad8110706f3811 include/linux/atomic/atomic-arch-fallback.h Mark Rutland   2023-06-05  831   * Atomically updates @v to (@v - @i) with release ordering.
ad8110706f3811 include/linux/atomic/atomic-arch-fallback.h Mark Rutland   2023-06-05  832   *
ad8110706f3811 include/linux/atomic/atomic-arch-fallback.h Mark Rutland   2023-06-05  833   * Safe to use in noinstr code; prefer atomic_sub_return_release() elsewhere.
ad8110706f3811 include/linux/atomic/atomic-arch-fallback.h Mark Rutland   2023-06-05  834   *
ad8110706f3811 include/linux/atomic/atomic-arch-fallback.h Mark Rutland   2023-06-05  835   * Return: The updated value of @v.
ad8110706f3811 include/linux/atomic/atomic-arch-fallback.h Mark Rutland   2023-06-05  836   */
37f8173dd84936 include/linux/atomic-arch-fallback.h        Peter Zijlstra 2020-01-24  837  static __always_inline int
9257959a6e5b4f include/linux/atomic/atomic-arch-fallback.h Mark Rutland   2023-06-05  838  raw_atomic_sub_return_release(int i, atomic_t *v)
37f8173dd84936 include/linux/atomic-arch-fallback.h        Peter Zijlstra 2020-01-24  839  {
1d78814d41701c include/linux/atomic/atomic-arch-fallback.h Mark Rutland   2023-06-05  840  #if defined(arch_atomic_sub_return_release)
1d78814d41701c include/linux/atomic/atomic-arch-fallback.h Mark Rutland   2023-06-05  841  	return arch_atomic_sub_return_release(i, v);
1d78814d41701c include/linux/atomic/atomic-arch-fallback.h Mark Rutland   2023-06-05  842  #elif defined(arch_atomic_sub_return_relaxed)
37f8173dd84936 include/linux/atomic-arch-fallback.h        Peter Zijlstra 2020-01-24  843  	__atomic_release_fence();
37f8173dd84936 include/linux/atomic-arch-fallback.h        Peter Zijlstra 2020-01-24  844  	return arch_atomic_sub_return_relaxed(i, v);
9257959a6e5b4f include/linux/atomic/atomic-arch-fallback.h Mark Rutland   2023-06-05  845  #elif defined(arch_atomic_sub_return)
1d78814d41701c include/linux/atomic/atomic-arch-fallback.h Mark Rutland   2023-06-05 @846  	return arch_atomic_sub_return(i, v);
9257959a6e5b4f include/linux/atomic/atomic-arch-fallback.h Mark Rutland   2023-06-05  847  #else
9257959a6e5b4f include/linux/atomic/atomic-arch-fallback.h Mark Rutland   2023-06-05  848  #error "Unable to define raw_atomic_sub_return_release"
9257959a6e5b4f include/linux/atomic/atomic-arch-fallback.h Mark Rutland   2023-06-05  849  #endif
1d78814d41701c include/linux/atomic/atomic-arch-fallback.h Mark Rutland   2023-06-05  850  }
9257959a6e5b4f include/linux/atomic/atomic-arch-fallback.h Mark Rutland   2023-06-05  851  

:::::: The code at line 846 was first introduced by commit
:::::: 1d78814d41701c216e28fcf2656526146dec4a1a locking/atomic: scripts: simplify raw_atomic*() definitions

:::::: TO: Mark Rutland <mark.rutland@arm.com>
:::::: CC: Peter Zijlstra <peterz@infradead.org>

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