+ mm-remove-foll_flags-in-__get_user_pages.patch added to mm-unstable branch

+ mm-remove-foll_flags-in-__get_user_pages.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm: remove foll_flags in __get_user_pages
has been added to the -mm mm-unstable branch.  Its filename is
     mm-remove-foll_flags-in-__get_user_pages.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-remove-foll_flags-in-__get_user_pages.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Josef Bacik <josef@toxicpanda.com>
Subject: mm: remove foll_flags in __get_user_pages
Date: Thu, 18 Jul 2024 17:26:07 -0400

Now that we're not passing around a pointer to the flags, there's no
reason to have an extra variable for the gup_flags, simply pass the
gup_flags directly everywhere.

Link: https://lkml.kernel.org/r/1e79b84bd30287cc9847f2aeb002374e6e60a10f.1721337845.git.josef@toxicpanda.com
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Acked-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/gup.c |   10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

--- a/mm/gup.c~mm-remove-foll_flags-in-__get_user_pages
+++ a/mm/gup.c
@@ -1437,7 +1437,6 @@ static long __get_user_pages(struct mm_s
 
 	do {
 		struct page *page;
-		unsigned int foll_flags = gup_flags;
 		unsigned int page_increm;
 
 		/* first iteration or cross vma bound */
@@ -1488,9 +1487,9 @@ retry:
 		}
 		cond_resched();
 
-		page = follow_page_mask(vma, start, foll_flags, &ctx);
+		page = follow_page_mask(vma, start, gup_flags, &ctx);
 		if (!page || PTR_ERR(page) == -EMLINK) {
-			ret = faultin_page(vma, start, foll_flags,
+			ret = faultin_page(vma, start, gup_flags,
 					   PTR_ERR(page) == -EMLINK, locked);
 			switch (ret) {
 			case 0:
@@ -1547,13 +1546,12 @@ next_page:
 				 * large folio, this should never fail.
 				 */
 				if (try_grab_folio(folio, page_increm - 1,
-						   foll_flags)) {
+						   gup_flags)) {
 					/*
 					 * Release the 1st page ref if the
 					 * folio is problematic, fail hard.
 					 */
-					gup_put_folio(folio, 1,
-						      foll_flags);
+					gup_put_folio(folio, 1, gup_flags);
 					ret = -EFAULT;
 					goto out;
 				}
_

Patches currently in -mm which might be from josef@toxicpanda.com are

mm-cleanup-flags-usage-in-faultin_page.patch
mm-remove-foll_flags-in-__get_user_pages.patch