[android-common:android16-6.12-desktop 36/36] drivers/block/zram/zram_ioctl.c:128:23: error: alignment may not be specified for 'pidfd'

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

Hi Richard,

FYI, the error/warning still remains.

tree:   https://android.googlesource.com/kernel/common android16-6.12-desktop
head:   80789ec92e27cff976d5fc1f92a536be1bb3b14c
commit: 160a4092db67397d85b790f102f375ae0e045257 [36/36] ANDROID: zram: Add ZRAM_ANDROID_IOC_PROCESS_PREFETCH ioctl
config: arm-allyesconfig (https://download.01.org/0day-ci/archive/20260406/202604060832.eGI4CqSI-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260406/202604060832.eGI4CqSI-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/202604060832.eGI4CqSI-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/block/zram/zram_ioctl.c:128:23: error: alignment may not be specified for 'pidfd'
     128 |         __aligned_u64 pidfd,

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for INTEL_MEI_ME
   Depends on [n]: X86 && PCI [=y]
   Selected by [y]:
   - INTEL_MEI_HDCP [=y] && (DRM_I915 [=n] || DRM_XE [=y])
   - INTEL_MEI_PXP [=y] && (DRM_I915 [=n] || DRM_XE [=y])


vim +/pidfd +128 drivers/block/zram/zram_ioctl.c

   126	
   127	static int zram_ioctl_process_scan(struct zram *zram, unsigned int cmd,
 > 128		__aligned_u64 pidfd,
   129		struct zram_android_ioc_process_range_writeback *prwb,
   130		struct zram_pp_ctl *ctl)
   131	{
   132		struct mm_struct *mm;
   133		struct vm_area_struct *vma;
   134		struct task_struct *task;
   135		unsigned long start_addr = 0;
   136		u64 nr_remaining_pages = 0;
   137		unsigned int f_flags;
   138		int ret = 0;
   139	
   140		struct zram_process_walk_private private = {
   141			.zram = zram,
   142			.pp_ctl = ctl,
   143			.cmd = cmd,
   144		};
   145	
   146		if (cmd == ZRAM_ANDROID_IOC_PROCESS_RANGE_WRITEBACK) {
   147			start_addr = (unsigned long)prwb->start_addr;
   148			nr_remaining_pages = DIV_ROUND_UP_POW2(prwb->size, PAGE_SIZE);
   149		}
   150	
   151		if (!nr_remaining_pages)
   152			private.nr_remaining_pages = NR_PAGES_UNLIMITED;
   153		else
   154			private.nr_remaining_pages = nr_remaining_pages;
   155	
   156		task = pidfd_get_task(pidfd, &f_flags);
   157		if (IS_ERR(task))
   158			return PTR_ERR(task);
   159	
   160		mm = get_task_mm(task);
   161		if (!mm) {
   162			ret = -ESRCH;
   163			goto release_task;
   164		}
   165	
   166		if (start_addr >= mm->task_size) {
   167			ret = -EINVAL;
   168			goto release_mm;
   169		}
   170	
   171		if (!IS_ALIGNED(start_addr, PAGE_SIZE)) {
   172			ret = -EINVAL;
   173			goto release_mm;
   174		}
   175	
   176		VMA_ITERATOR(vmi, mm, start_addr);
   177		/* Iterates through all the VMAs of the process */
   178		mmap_read_lock(mm);
   179		for_each_vma(vmi, vma) {
   180			unsigned long start = max(vma->vm_start, start_addr);
   181	
   182			if (!vma_is_anonymous(vma) && (!can_do_file_pageout(vma) &&
   183						       (vma->vm_flags & VM_MAYSHARE)))
   184				continue;
   185	
   186			ret = walk_page_range(mm, start, vma->vm_end,
   187					      &zram_walk_ops, &private);
   188			if (ret)
   189				break;
   190		}
   191	
   192		if (cmd == ZRAM_ANDROID_IOC_PROCESS_RANGE_WRITEBACK) {
   193			if (ret > 0) {
   194				prwb->next_addr = private.next_addr;
   195				ret = 0;
   196			} else {
   197				prwb->next_addr = 0;
   198			}
   199		}
   200	
   201		mmap_read_unlock(mm);
   202	release_mm:
   203		mmput(mm);
   204	release_task:
   205		put_task_struct(task);
   206	
   207		return ret;
   208	}
   209	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki