[leon-rdma:rdma-next 80/81] drivers/infiniband/hw/mlx4/mlx4_ib.h:948:46: sparse: sparse: cast truncates bits from constant value (1fffff000 becomes fffff000)

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/leon/linux-rdma.git rdma-next
head:   845d2ffec19e577cacf326ed496df4a7bb12642f
commit: 99af5949be7199ac79c2f922f02eb42c20080554 [80/81] RDMA/mlx4: Use ib_umem_find_best_pgsz() to calculate MTT size
config: arc-randconfig-r133-20241117 (https://download.01.org/0day-ci/archive/20241118/202411181852.09fun6Hi-lkp@intel.com/config)
compiler: arceb-elf-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20241118/202411181852.09fun6Hi-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/202411181852.09fun6Hi-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   drivers/infiniband/hw/mlx4/cq.c: note: in included file:
>> drivers/infiniband/hw/mlx4/mlx4_ib.h:948:46: sparse: sparse: cast truncates bits from constant value (1fffff000 becomes fffff000)
   drivers/infiniband/hw/mlx4/cq.c: note: in included file (through arch/arc/include/asm/irqflags.h, include/linux/irqflags.h, include/linux/spinlock.h, ...):
   arch/arc/include/asm/irqflags-arcv2.h:80:31: sparse: sparse: undefined identifier '__builtin_arc_lr'
   arch/arc/include/asm/irqflags-arcv2.h:83:17: sparse: sparse: undefined identifier '__builtin_arc_sr'
--
   drivers/infiniband/hw/mlx4/mr.c: note: in included file:
>> drivers/infiniband/hw/mlx4/mlx4_ib.h:948:46: sparse: sparse: cast truncates bits from constant value (1fffff000 becomes fffff000)
--
   drivers/infiniband/hw/mlx4/qp.c: note: in included file:
>> drivers/infiniband/hw/mlx4/mlx4_ib.h:948:46: sparse: sparse: cast truncates bits from constant value (1fffff000 becomes fffff000)

vim +948 drivers/infiniband/hw/mlx4/mlx4_ib.h

   926	
   927	struct ib_wq *mlx4_ib_create_wq(struct ib_pd *pd,
   928					struct ib_wq_init_attr *init_attr,
   929					struct ib_udata *udata);
   930	int mlx4_ib_destroy_wq(struct ib_wq *wq, struct ib_udata *udata);
   931	int mlx4_ib_modify_wq(struct ib_wq *wq, struct ib_wq_attr *wq_attr,
   932			      u32 wq_attr_mask, struct ib_udata *udata);
   933	
   934	int mlx4_ib_create_rwq_ind_table(struct ib_rwq_ind_table *ib_rwq_ind_tbl,
   935					 struct ib_rwq_ind_table_init_attr *init_attr,
   936					 struct ib_udata *udata);
   937	static inline int
   938	mlx4_ib_destroy_rwq_ind_table(struct ib_rwq_ind_table *wq_ind_table)
   939	{
   940		return 0;
   941	}
   942	static inline int mlx4_ib_umem_calc_optimal_mtt_size(struct ib_umem *umem,
   943							     u64 start,
   944							     int *num_of_mtts)
   945	{
   946		unsigned long pg_sz;
   947	
 > 948		pg_sz = ib_umem_find_best_pgsz(umem, MLX4_PAGE_SIZE_SUPPORTED, start);
   949		if (!pg_sz)
   950			return -EOPNOTSUPP;
   951	
   952		*num_of_mtts = ib_umem_num_dma_blocks(umem, pg_sz);
   953		return order_base_2(pg_sz);
   954	}
   955	

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