github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-11-07 06:17:02 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

mm/page_vma_mapped: guard check_pmd() with CONFIG_TRANSPARENT_HUGEPAGE

Browse Source 
The kernel test robot reported a build failure on the parisc architecture
when expanding HPAGE_PMD_NR in check_pmd().

   mm/page_vma_mapped.c:142:13: note: in expansion of macro 'HPAGE_PMD_NR'
     if ((pfn + HPAGE_PMD_NR - 1) < pvmw->pfn)
                ^~~~~~~~~~~~

The config [1] in report link shows neither TRANSPARENT_HUGEPAGE nor
HUGETLB_PAGE is defined.  Then trigger the BUILD_BUG.

Fix it by define check_pmd() under CONFIG_TRANSPARENT_HUGEPAGE.

Link: https://lore.kernel.org/20260624082359.2869-1-richard.weiyang@gmail.com
Link: https://download.01.org/0day-ci/archive/20260624/202606240042.ffPsEXVc-lkp@intel.com/config [1]
Fixes: 2aff7a4755 ("mm: Convert page_vma_mapped_walk to work on PFNs")
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202606240042.ffPsEXVc-lkp@intel.com/
Cc: David Hildenbrand <david@kernel.org>
Cc: Harry Yoo <harry@kernel.org>
Cc: Jann Horn <jannh@google.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
This commit is contained in:
Wei Yang 2026-06-24 08:23:59 +00:00 committed by Andrew Morton
parent ae62466cda
commit 908dd0101e
1 changed files with 7 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
mm/page_vma_mapped.c
View File

@ -142,6 +142,7 @@ static bool check_pte(struct page_vma_mapped_walk *pvmw, unsigned long pte_nr)
return true;
}
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
/* Returns true if the two ranges overlap. Careful to not overflow. */
static bool check_pmd(unsigned long pfn, struct page_vma_mapped_walk *pvmw)
{
@ -151,6 +152,12 @@ static bool check_pmd(unsigned long pfn, struct page_vma_mapped_walk *pvmw)
return false;
return true;
}
#else
static bool check_pmd(unsigned long pfn, struct page_vma_mapped_walk *pvmw)
{
return false;
}
#endif
static void step_forward(struct page_vma_mapped_walk *pvmw, unsigned long size)
{