Hi Tomeu,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 83a7eefedc9b56fe7bfeff13b6c7356688ffa670]

url: https://github.com/intel-lab-lkp/linux/commits/Tomeu-Vizoso/iommu-rockchip-A... base: 83a7eefedc9b56fe7bfeff13b6c7356688ffa670 patch link: https://lore.kernel.org/r/20240612-6-10-rocket-v1-8-060e48eea250%40tomeuvizo... patch subject: [PATCH 8/9] accel/rocket: Add job submission IOCTL config: hexagon-allmodconfig (https://download.01.org/0day-ci/archive/20240613/202406131640.WbBaRMbr-lkp@i...) compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 4403cdbaf01379de96f8d0d6ea4f51a085e37766) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240613/202406131640.WbBaRMbr-lkp@i...)

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/202406131640.WbBaRMbr-lkp@intel.com/

All warnings (new ones prefixed by >>):

In file included from drivers/accel/rocket/rocket_job.c:6: In file included from include/drm/drm_file.h:39: In file included from include/drm/drm_prime.h:37: In file included from include/linux/scatterlist.h:8: In file included from include/linux/mm.h:2253: include/linux/vmstat.h:514:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 514 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~ In file included from drivers/accel/rocket/rocket_job.c:6: In file included from include/drm/drm_file.h:39: In file included from include/drm/drm_prime.h:37: In file included from include/linux/scatterlist.h:9: In file included from arch/hexagon/include/asm/io.h:328: include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 548 | val = __raw_readb(PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 561 | val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu' 37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x)) | ^ In file included from drivers/accel/rocket/rocket_job.c:6: In file included from include/drm/drm_file.h:39: In file included from include/drm/drm_prime.h:37: In file included from include/linux/scatterlist.h:9: In file included from arch/hexagon/include/asm/io.h:328: include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 574 | val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu' 35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x)) | ^ In file included from drivers/accel/rocket/rocket_job.c:6: In file included from include/drm/drm_file.h:39: In file included from include/drm/drm_prime.h:37: In file included from include/linux/scatterlist.h:9: In file included from arch/hexagon/include/asm/io.h:328: include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 585 | __raw_writeb(value, PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 595 | __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 605 | __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^

...

drivers/accel/rocket/rocket_job.c:353:11: warning: variable 'status' set but not used [-Wunused-but-set-variable]

353 | uint32_t status, raw_status; | ^

...

drivers/accel/rocket/rocket_job.c:353:19: warning: variable 'raw_status' set but not used [-Wunused-but-set-variable]

353 | uint32_t status, raw_status; | ^ drivers/accel/rocket/rocket_job.c:40:1: warning: unused function 'to_rocket_fence' [-Wunused-function] 40 | to_rocket_fence(struct dma_fence *fence) | ^~~~~~~~~~~~~~~ 10 warnings generated.

Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for IOMMU_IO_PGTABLE_LPAE Depends on [n]: IOMMU_SUPPORT [=y] && (ARM || ARM64 || COMPILE_TEST [=y]) && !GENERIC_ATOMIC64 [=y] Selected by [m]: - DRM_ACCEL_ROCKET [=m] && DRM [=m] && (ARM64 || COMPILE_TEST [=y]) && MMU [=y]

vim +/status +353 drivers/accel/rocket/rocket_job.c

350 351 static void rocket_job_handle_irq(struct rocket_core *core) 352 {

353 uint32_t status, raw_status;

354 355 pm_runtime_mark_last_busy(core->dev->dev); 356 357 status = rocket_read(core, REG_PC_INTERRUPT_STATUS); 358 raw_status = rocket_read(core, REG_PC_INTERRUPT_RAW_STATUS); 359 360 rocket_write(core, REG_PC_OPERATION_ENABLE, 0x0); 361 rocket_write(core, REG_PC_INTERRUPT_CLEAR, 0x1ffff); 362 363 spin_lock(&core->job_lock); 364 365 if (core->in_flight_job) 366 rocket_job_handle_done(core, core->in_flight_job); 367 368 spin_unlock(&core->job_lock); 369 } 370