6.1-stable review patch. If anyone has any objections, please let me know.
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From: Alex Williamson alex.williamson@redhat.com
The backport of upstream commit c8070b787519 ("mm: Don't pin ZERO_PAGE in pin_user_pages()") into v6.1.130 noted below in Fixes does not account for commit 0f0892356fa1 ("mm: allow multiple error returns in try_grab_page()"), which changed the return value of try_grab_page() from bool to int. Therefore returning 0, success in the upstream version, becomes an error here. Fix the return value.
Fixes: 476c1dfefab8 ("mm: Don't pin ZERO_PAGE in pin_user_pages()") Link: https://lore.kernel.org/all/Z_6uhLQjJ7SSzI13@eldamar.lan Reported-by: Salvatore Bonaccorso carnil@debian.org Reported-by: Milan Broz gmazyland@gmail.com Reviewed-by: David Hildenbrand david@redhat.com Cc: stable@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org Cc: Sasha Levin sashal@kernel.org Signed-off-by: Alex Williamson alex.williamson@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- mm/gup.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/gup.c +++ b/mm/gup.c @@ -232,7 +232,7 @@ bool __must_check try_grab_page(struct p * and it is used in a *lot* of places. */ if (is_zero_page(page)) - return 0; + return true;
/* * Similar to try_grab_folio(): be sure to *also*