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UPSTREAM: mm: Fix is_zero_page() usage in try_grab_page()

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The backport of upstream commit c8070b7875 ("mm: Don't pin ZERO_PAGE
in pin_user_pages()") into v6.1.130 noted below in Fixes does not
account for commit 0f0892356f ("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.

Bug: 411256892
Fixes: 476c1dfefa ("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>
Change-Id: I1a124e70161e48c9b3374aa3fc541c6a13ea1ff0
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit edde34b792)
Signed-off-by: Will McVicker <willmcvicker@google.com>
This commit is contained in:
Alex Williamson
2025-04-16 14:24:39 -06:00
committed by William McVicker
parent 53b26534cc
commit 3cd01bb5bd
1 changed files with 1 additions and 1 deletions
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mm/gup.c
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@@ -232,7 +232,7 @@ bool __must_check try_grab_page(struct page *page, unsigned int flags)
* and it is used in a *lot* of places. * and it is used in a *lot* of places.
*/ */
if (is_zero_page(page)) if (is_zero_page(page))
return 0; return true;
/* /*
* Similar to try_grab_folio(): be sure to *also* * Similar to try_grab_folio(): be sure to *also*