Looks like we might have to replace the IS_ENABLED with an ifdef to cater for the 32-bit phys_addr_t and overzealous compilers.
On Tue, Aug 25, 2020 at 01:45:38PM +0800, kernel test robot wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > master > head: 6a9dc5fd6170d0a41c8a14eb19e63d94bea5705a > commit: d7e673ec2c8e0ea39c4c70fc490d67d7fbda869d dma-pool: Only allocate from > CMA when in same memory zone > date: 11 days ago > config: arc-randconfig-m031-20200824 (attached as .config) > compiler: arc-elf-gcc (GCC) 9.3.0 > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <[email protected]> > > New smatch warnings: > kernel/dma/pool.c:79 cma_in_zone() warn: always true condition '(end <= > ((((32) == 64)) ?~0:((1 << (32)) - 1))) => (0-u32max <= u32max)' > > Old smatch warnings: > arch/arc/include/asm/thread_info.h:65 current_thread_info() error: > uninitialized symbol 'sp'. > > # > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d7e673ec2c8e0ea39c4c70fc490d67d7fbda869d > git remote add linus > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > git fetch --no-tags linus master > git checkout d7e673ec2c8e0ea39c4c70fc490d67d7fbda869d > vim +79 kernel/dma/pool.c > > 59 > 60 static bool cma_in_zone(gfp_t gfp) > 61 { > 62 unsigned long size; > 63 phys_addr_t end; > 64 struct cma *cma; > 65 > 66 cma = dev_get_cma_area(NULL); > 67 if (!cma) > 68 return false; > 69 > 70 size = cma_get_size(cma); > 71 if (!size) > 72 return false; > 73 > 74 /* CMA can't cross zone boundaries, see > cma_activate_area() */ > 75 end = cma_get_base(cma) + size - 1; > 76 if (IS_ENABLED(CONFIG_ZONE_DMA) && (gfp & GFP_DMA)) > 77 return end <= DMA_BIT_MASK(zone_dma_bits); > 78 if (IS_ENABLED(CONFIG_ZONE_DMA32) && (gfp & GFP_DMA32)) > > 79 return end <= DMA_BIT_MASK(32); > 80 return true; > 81 } > 82 > > --- > 0-DAY CI Kernel Test Service, Intel Corporation > https://lists.01.org/hyperkitty/list/[email protected] ---end quoted text---
