Add test that pages have the exclusive pin bias when providing FOLL_EXCLUSIVE.
Signed-off-by: Elliot Berman <[email protected]> --- mm/gup_test.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/mm/gup_test.c b/mm/gup_test.c index eeb3f4d87c510..9c6b8c93e44a7 100644 --- a/mm/gup_test.c +++ b/mm/gup_test.c @@ -66,6 +66,26 @@ static void verify_dma_pinned(unsigned int cmd, struct page **pages, } } +static void verify_exclusive_pinned(unsigned int gup_flags, struct page **pages, + unsigned long nr_pages) +{ + unsigned long i; + const struct folio *folio; + + if (!(gup_flags & FOLL_EXCLUSIVE)) + return; + + for (i = 0; i < nr_pages; i++) { + folio = page_folio(pages[i]); + + if (WARN(!folio_maybe_exclusive_pinned(folio), + "pages[%lu] is not exclusive pinned\n", i)) { + dump_page(&folio->page, "gup_test failure"); + break; + } + } +} + static void dump_pages_test(struct gup_test *gup, struct page **pages, unsigned long nr_pages) { @@ -185,6 +205,8 @@ static int __gup_test_ioctl(unsigned int cmd, */ verify_dma_pinned(cmd, pages, nr_pages); + verify_exclusive_pinned(gup->gup_flags, pages, nr_pages); + if (cmd == DUMP_USER_PAGES_TEST) dump_pages_test(gup, pages, nr_pages); -- 2.34.1
