Commit 9651eeab authored by Kemeng Shi's avatar Kemeng Shi Committed by Andrew Morton
Browse files

mm: correct stale comment of function check_pte 

Commit 2aff7a47 ("mm: Convert page_vma_mapped_walk to work on PFNs")
replaced page with pfns in page_vma_mapped_walk structure and updated
"@pvmw->page" to "@pvmw->pfn" in comment of function page_vma_mapped_walk.

This patch update stale "page" to "pfn" in comment of check_pte.

Link: https://lkml.kernel.org/r/20230707153953.1380615-1-shikemeng@huaweicloud.com


Signed-off-by: default avatarKemeng Shi <shikemeng@huaweicloud.com>
Reviewed-by: default avatarMatthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent b4fa966f

mm/page_vma_mapped.c

+7 −5
Original line number Diff line number Diff line
@@ -73,20 +73,22 @@ static bool map_pte(struct page_vma_mapped_walk *pvmw, spinlock_t **ptlp) 
}



/**

 * check_pte - check if @pvmw->page is mapped at the @pvmw->pte

 * @pvmw: page_vma_mapped_walk struct, includes a pair pte and page for checking

 * check_pte - check if [pvmw->pfn, @pvmw->pfn + @pvmw->nr_pages) is

 * mapped at the @pvmw->pte

 * @pvmw: page_vma_mapped_walk struct, includes a pair pte and pfn range

 * for checking

 *

 * page_vma_mapped_walk() found a place where @pvmw->page is *potentially*

 * page_vma_mapped_walk() found a place where pfn range is *potentially*

 * mapped. check_pte() has to validate this.

 *

 * pvmw->pte may point to empty PTE, swap PTE or PTE pointing to

 * arbitrary page.

 *

 * If PVMW_MIGRATION flag is set, returns true if @pvmw->pte contains migration

 * entry that points to @pvmw->page or any subpage in case of THP.

 * entry that points to [pvmw->pfn, @pvmw->pfn + @pvmw->nr_pages)

 *

 * If PVMW_MIGRATION flag is not set, returns true if pvmw->pte points to

 * pvmw->page or any subpage in case of THP.

 * [pvmw->pfn, @pvmw->pfn + @pvmw->nr_pages)

 *

 * Otherwise, return false.

 *