diff options
| author | Matthew Wilcox (Oracle) | 2023-08-22 18:24:59 +0100 |
|---|---|---|
| committer | Andrew Morton | 2023-08-24 16:20:31 -0700 |
| commit | 8cfd014efd93e9450fcd4892bbfe8b10f41e53c3 (patch) | |
| tree | 7ae0d44b0ecb082d32f23dedce5cc6ed184cc33f | |
| parent | 61ff748b5b7b0c32daddbfb92c3bc15d938754dc (diff) | |
hugetlb: add documentation for vma_kernel_pagesize()
This is an exported symbol, so it should have kernel-doc. Update it to
mention folios, and point out that they might be larger than the supported
page size for this VMA.
Link: https://lkml.kernel.org/r/20230822172459.4190699-1-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | mm/hugetlb.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index cbc25826c9b0..ba6d39b71cb1 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -968,9 +968,14 @@ pgoff_t linear_hugepage_index(struct vm_area_struct *vma, } EXPORT_SYMBOL_GPL(linear_hugepage_index); -/* - * Return the size of the pages allocated when backing a VMA. In the majority - * cases this will be same size as used by the page table entries. +/** + * vma_kernel_pagesize - Page size granularity for this VMA. + * @vma: The user mapping. + * + * Folios in this VMA will be aligned to, and at least the size of the + * number of bytes returned by this function. + * + * Return: The default size of the folios allocated when backing a VMA. */ unsigned long vma_kernel_pagesize(struct vm_area_struct *vma) { |