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X-CSE-ConnectionGUID: 4iTIxKV7SfaO4BPCY29ONw== X-CSE-MsgGUID: mGPLnRQqQImHa5DfBGvD5Q== X-IronPort-AV: E=McAfee;i="6800,10657,11804"; a="106543559" X-IronPort-AV: E=Sophos;i="6.24,181,1774335600"; d="scan'208";a="106543559" Received: from orviesa006.jf.intel.com ([10.64.159.146]) by fmvoesa101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Jun 2026 09:34:46 -0700 X-CSE-ConnectionGUID: pDOr7+UYSOWGM0VbsdpfOQ== X-CSE-MsgGUID: odw9bFdXS/GyOwGgzeuMrQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.24,181,1774335600"; d="scan'208";a="242573666" Received: from lkp-server01.sh.intel.com (HELO f0d55cb201f0) ([10.239.97.150]) by orviesa006.jf.intel.com with ESMTP; 01 Jun 2026 09:34:43 -0700 Received: from kbuild by f0d55cb201f0 with local (Exim 4.98.2) (envelope-from ) id 1wU5b6-00000000AoX-21Xf; Mon, 01 Jun 2026 16:34:40 +0000 Date: Tue, 02 Jun 2026 00:34:05 +0800 From: kernel test robot To: Thomas Ballasi Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, Andrew Morton , Linux Memory Management List Subject: mm/vmscan.c:6585:66: sparse: sparse: Using plain integer as NULL pointer Message-ID: <202606020025.ZBQ7ncEa-lkp@intel.com> User-Agent: s-nail v14.9.25 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: e43ffb69e0438cddd72aaa30898b4dc446f664f8 commit: 874a0a566ede40f3d6062cae8fe1022e616edd1a mm: vmscan: add cgroup IDs to vmscan tracepoints date: 8 weeks ago config: alpha-randconfig-r122-20260601 (https://download.01.org/0day-ci/archive/20260602/202606020025.ZBQ7ncEa-lkp@intel.com/config) compiler: alpha-linux-gcc (GCC) 12.5.0 sparse: v0.6.5-rc1 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260602/202606020025.ZBQ7ncEa-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 | Fixes: 874a0a566ede ("mm: vmscan: add cgroup IDs to vmscan tracepoints") | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202606020025.ZBQ7ncEa-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) >> mm/vmscan.c:6585:66: sparse: sparse: Using plain integer as NULL pointer mm/vmscan.c:6589:58: sparse: sparse: Using plain integer as NULL pointer vim +6585 mm/vmscan.c 6551 6552 unsigned long try_to_free_pages(struct zonelist *zonelist, int order, 6553 gfp_t gfp_mask, nodemask_t *nodemask) 6554 { 6555 unsigned long nr_reclaimed; 6556 struct scan_control sc = { 6557 .nr_to_reclaim = SWAP_CLUSTER_MAX, 6558 .gfp_mask = current_gfp_context(gfp_mask), 6559 .reclaim_idx = gfp_zone(gfp_mask), 6560 .order = order, 6561 .nodemask = nodemask, 6562 .priority = DEF_PRIORITY, 6563 .may_writepage = 1, 6564 .may_unmap = 1, 6565 .may_swap = 1, 6566 }; 6567 6568 /* 6569 * scan_control uses s8 fields for order, priority, and reclaim_idx. 6570 * Confirm they are large enough for max values. 6571 */ 6572 BUILD_BUG_ON(MAX_PAGE_ORDER >= S8_MAX); 6573 BUILD_BUG_ON(DEF_PRIORITY > S8_MAX); 6574 BUILD_BUG_ON(MAX_NR_ZONES > S8_MAX); 6575 6576 /* 6577 * Do not enter reclaim if fatal signal was delivered while throttled. 6578 * 1 is returned so that the page allocator does not OOM kill at this 6579 * point. 6580 */ 6581 if (throttle_direct_reclaim(sc.gfp_mask, zonelist, nodemask)) 6582 return 1; 6583 6584 set_task_reclaim_state(current, &sc.reclaim_state); > 6585 trace_mm_vmscan_direct_reclaim_begin(sc.gfp_mask, order, 0); 6586 6587 nr_reclaimed = do_try_to_free_pages(zonelist, &sc); 6588 6589 trace_mm_vmscan_direct_reclaim_end(nr_reclaimed, 0); 6590 set_task_reclaim_state(current, NULL); 6591 6592 return nr_reclaimed; 6593 } 6594 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki