On Wed, Feb 24, 2021 at 12:04 PM Mike Kravetz <mike.kravetz@xxxxxxxxxx> wrote: > > Expand comments, no functional change. > > Signed-off-by: Mike Kravetz <mike.kravetz@xxxxxxxxxx> Reviewed-by: Muchun Song <songmuchun@xxxxxxxxxxxxx> Thanks > --- > include/linux/hugetlb.h | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h > index cccd1aab69dd..c0467a7a1fe0 100644 > --- a/include/linux/hugetlb.h > +++ b/include/linux/hugetlb.h > @@ -476,6 +476,9 @@ unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, > * huegtlb page specific state flags. These flags are located in page.private > * of the hugetlb head page. Functions created via the below macros should be > * used to manipulate these flags. > + * Note: The hugetlb page subpool pointer previously located at page.private > + * was moved to page[1].private to make room for flags in the head page. See > + * hugetlb_page_subpool(). > * > * HPG_restore_reserve - Set when a hugetlb page consumes a reservation at > * allocation time. Cleared when page is fully instantiated. Free > -- > 2.29.2 >
