diff options
| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2024-04-12 20:35:00 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-05-05 17:53:45 -0700 |
| commit | 37bc2ff506b184411e4cc80f111c638b2b4c83d4 (patch) | |
| tree | d602c31d0164361c26059dff755aa442a912e88e /mm/page_vma_mapped.c | |
| parent | f2b37197c267206979213592923b418039d232dd (diff) | |
mm: return the address from page_mapped_in_vma()
The only user of this function calls page_address_in_vma() immediately
after page_mapped_in_vma() calculates it and uses it to return true/false.
Return the address instead, allowing memory-failure to skip the call to
page_address_in_vma().
Link: https://lkml.kernel.org/r/20240412193510.2356957-4-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Jane Chu <jane.chu@oracle.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Oscar Salvador <osalvador@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/page_vma_mapped.c')
| -rw-r--r-- | mm/page_vma_mapped.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/mm/page_vma_mapped.c b/mm/page_vma_mapped.c index 53b8868ede61..c202eab84936 100644 --- a/mm/page_vma_mapped.c +++ b/mm/page_vma_mapped.c @@ -319,11 +319,12 @@ next_pte: * @page: the page to test * @vma: the VMA to test * - * Returns 1 if the page is mapped into the page tables of the VMA, 0 - * if the page is not mapped into the page tables of this VMA. Only - * valid for normal file or anonymous VMAs. + * Return: The address the page is mapped at if the page is in the range + * covered by the VMA and present in the page table. If the page is + * outside the VMA or not present, returns -EFAULT. + * Only valid for normal file or anonymous VMAs. */ -int page_mapped_in_vma(struct page *page, struct vm_area_struct *vma) +unsigned long page_mapped_in_vma(struct page *page, struct vm_area_struct *vma) { struct folio *folio = page_folio(page); pgoff_t pgoff = folio->index + folio_page_idx(folio, page); @@ -336,9 +337,10 @@ int page_mapped_in_vma(struct page *page, struct vm_area_struct *vma) pvmw.address = vma_address(vma, pgoff, 1); if (pvmw.address == -EFAULT) - return 0; + goto out; if (!page_vma_mapped_walk(&pvmw)) - return 0; + return -EFAULT; page_vma_mapped_walk_done(&pvmw); - return 1; +out: + return pvmw.address; } |