[ast-bpf:trylock 23/29] mm/page_alloc.c:7079:53: error: 'zone' undeclared

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/ast/bpf.git trylock
head:   1b2329dd88553224f4ef9a26e1b22cea83b071a5
commit: da4b036e3dc46bc8ab5add0a7d4944de54182afe [23/29] mm, bpf: Introduce try_alloc_pages() for opportunistic page allocation
config: x86_64-rhel-9.4 (https://download.01.org/0day-ci/archive/20250114/202501140820.eaqK0nPJ-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250114/202501140820.eaqK0nPJ-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/202501140820.eaqK0nPJ-lkp@intel.com/

All errors (new ones prefixed by >>):

   mm/page_alloc.c: In function 'try_alloc_pages_noprof':
>> mm/page_alloc.c:7079:53: error: 'zone' undeclared (first use in this function)
    7079 |         if (has_unaccepted_memory() && !list_empty(&zone->unaccepted_pages))
         |                                                     ^~~~
   mm/page_alloc.c:7079:53: note: each undeclared identifier is reported only once for each function it appears in


vim +/zone +7079 mm/page_alloc.c

  7035	
  7036	struct page *try_alloc_pages_noprof(int nid, unsigned int order)
  7037	{
  7038		/*
  7039		 * Do not specify __GFP_DIRECT_RECLAIM, since direct claim is not allowed.
  7040		 * Do not specify __GFP_KSWAPD_RECLAIM either, since wake up of kswapd
  7041		 * is not safe in arbitrary context.
  7042		 *
  7043		 * These two are the conditions for gfpflags_allow_spinning() being true.
  7044		 *
  7045		 * Specify __GFP_NOWARN since failing try_alloc_pages() is not a reason
  7046		 * to warn. Also warn would trigger printk() which is unsafe from
  7047		 * various contexts. We cannot use printk_deferred_enter() to mitigate,
  7048		 * since the running context is unknown.
  7049		 *
  7050		 * Specify __GFP_ZERO to make sure that call to kmsan_alloc_page() below
  7051		 * is safe in any context. Also zeroing the page is mandatory for
  7052		 * BPF use cases.
  7053		 *
  7054		 * Though __GFP_NOMEMALLOC is not checked in the code path below,
  7055		 * specify it here to highlight that try_alloc_pages()
  7056		 * doesn't want to deplete reserves.
  7057		 */
  7058		gfp_t alloc_gfp = __GFP_NOWARN | __GFP_ZERO | __GFP_NOMEMALLOC;
  7059		unsigned int alloc_flags = ALLOC_TRYLOCK;
  7060		struct alloc_context ac = { };
  7061		struct page *page;
  7062	
  7063		/*
  7064		 * In RT spin_trylock() may call raw_spin_lock() which is unsafe in NMI.
  7065		 * If spin_trylock() is called from hard IRQ the current task may be
  7066		 * waiting for one rt_spin_lock, but rt_spin_trylock() will mark the
  7067		 * task as the owner of another rt_spin_lock which will confuse PI
  7068		 * logic, so return immediately if called form hard IRQ or NMI.
  7069		 *
  7070		 * Note, irqs_disabled() case is ok. This function can be called
  7071		 * from raw_spin_lock_irqsave region.
  7072		 */
  7073		if (IS_ENABLED(CONFIG_PREEMPT_RT) && (in_nmi() || in_hardirq()))
  7074			return NULL;
  7075		if (!pcp_allowed_order(order))
  7076			return NULL;
  7077	
  7078	#ifdef CONFIG_UNACCEPTED_MEMORY
> 7079		if (has_unaccepted_memory() && !list_empty(&zone->unaccepted_pages))

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