[norov:demotion2 3/6] mm/mempolicy.c:2155:11: error: use of undeclared identifier 'PG_demote'
From: kernel test robot
Date: Sun Aug 08 2021 - 19:03:15 EST
tree: https://github.com/norov/linux demotion2
head: f4bbcd30f7078209f786570ed763c18925916bfe
commit: dd58d1928e4d4b54398185ad21f39843d4138e14 [3/6] mm/demotion: introduce MPOL_F_DEMOTE for mbind() and set_mempolicy()
config: x86_64-randconfig-a001-20210808 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 41a6b50c25961addc04438b567ee1f4ef9e40f98)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/norov/linux/commit/dd58d1928e4d4b54398185ad21f39843d4138e14
git remote add norov https://github.com/norov/linux
git fetch --no-tags norov demotion2
git checkout dd58d1928e4d4b54398185ad21f39843d4138e14
# save the attached .config to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=x86_64 SHELL=/bin/bash
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>
All errors (new ones prefixed by >>):
>> mm/mempolicy.c:2155:11: error: use of undeclared identifier 'PG_demote'
set_bit(PG_demote, &page->flags);
^
1 error generated.
vim +/PG_demote +2155 mm/mempolicy.c
2065
2066 /**
2067 * alloc_pages_vma - Allocate a page for a VMA.
2068 * @gfp: GFP flags.
2069 * @order: Order of the GFP allocation.
2070 * @vma: Pointer to VMA or NULL if not available.
2071 * @addr: Virtual address of the allocation. Must be inside @vma.
2072 * @node: Which node to prefer for allocation (modulo policy).
2073 * @hugepage: For hugepages try only the preferred node if possible.
2074 *
2075 * Allocate a page for a specific address in @vma, using the appropriate
2076 * NUMA policy. When @vma is not NULL the caller must hold the mmap_lock
2077 * of the mm_struct of the VMA to prevent it from going away. Should be
2078 * used for all allocations for pages that will be mapped into user space.
2079 *
2080 * Return: The page on success or NULL if allocation fails.
2081 */
2082 struct page *alloc_pages_vma(gfp_t gfp, int order, struct vm_area_struct *vma,
2083 unsigned long addr, int node, bool hugepage)
2084 {
2085 unsigned short mode_flags;
2086 struct mempolicy *pol;
2087 struct page *page;
2088 int preferred_nid;
2089 nodemask_t *nmask;
2090
2091 pol = get_vma_policy(vma, addr);
2092 mode_flags = pol->flags;
2093
2094 if (pol->mode == MPOL_INTERLEAVE) {
2095 unsigned nid;
2096
2097 nid = interleave_nid(pol, vma, addr, PAGE_SHIFT + order);
2098 mpol_cond_put(pol);
2099 page = alloc_page_interleave(gfp, order, nid);
2100 goto out;
2101 }
2102
2103 if (pol->mode == MPOL_PREFERRED_MANY) {
2104 page = alloc_pages_preferred_many(gfp, order, node, pol);
2105 mpol_cond_put(pol);
2106 goto out;
2107 }
2108
2109 if (unlikely(IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE) && hugepage)) {
2110 int hpage_node = node;
2111
2112 /*
2113 * For hugepage allocation and non-interleave policy which
2114 * allows the current node (or other explicitly preferred
2115 * node) we only try to allocate from the current/preferred
2116 * node and don't fall back to other nodes, as the cost of
2117 * remote accesses would likely offset THP benefits.
2118 *
2119 * If the policy is interleave or does not allow the current
2120 * node in its nodemask, we allocate the standard way.
2121 */
2122 if (pol->mode == MPOL_PREFERRED)
2123 hpage_node = first_node(pol->nodes);
2124
2125 nmask = policy_nodemask(gfp, pol);
2126 if (!nmask || node_isset(hpage_node, *nmask)) {
2127 mpol_cond_put(pol);
2128 /*
2129 * First, try to allocate THP only on local node, but
2130 * don't reclaim unnecessarily, just compact.
2131 */
2132 page = __alloc_pages_node(hpage_node,
2133 gfp | __GFP_THISNODE | __GFP_NORETRY, order);
2134
2135 /*
2136 * If hugepage allocations are configured to always
2137 * synchronous compact or the vma has been madvised
2138 * to prefer hugepage backing, retry allowing remote
2139 * memory with both reclaim and compact as well.
2140 */
2141 if (!page && (gfp & __GFP_DIRECT_RECLAIM))
2142 page = __alloc_pages_node(hpage_node,
2143 gfp, order);
2144
2145 goto out;
2146 }
2147 }
2148
2149 nmask = policy_nodemask(gfp, pol);
2150 preferred_nid = policy_node(gfp, pol, node);
2151 page = __alloc_pages(gfp, order, preferred_nid, nmask);
2152 mpol_cond_put(pol);
2153 out:
2154 if (page && (mode_flags & MPOL_F_DEMOTE))
> 2155 set_bit(PG_demote, &page->flags);
2156
2157 return page;
2158 }
2159 EXPORT_SYMBOL(alloc_pages_vma);
2160
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
Attachment:
.config.gz
Description: application/gzip