+ mm-vmscan-avoid-signedness-error-for-gcc-54.patch added to mm-hotfixes-unstable branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: mm: vmscan: avoid signedness error for GCC 5.4
has been added to the -mm mm-hotfixes-unstable branch.  Its filename is
     mm-vmscan-avoid-signedness-error-for-gcc-54.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-vmscan-avoid-signedness-error-for-gcc-54.patch

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

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------------------------------------------------------
From: WangYuli <wangyuli@uniontech.com>
Subject: mm: vmscan: avoid signedness error for GCC 5.4
Date: Wed, 7 May 2025 12:08:27 +0800

To the GCC 5.4 compiler, (MAX_NR_TIERS - 1) (i.e., (4U - 1)) is unsigned,
whereas tier is a signed integer.

Then, the __types_ok check within the __careful_cmp_once macro failed,
triggered BUILD_BUG_ON.

Use min_t instead of min to circumvent this compiler error.

Fix follow error with gcc 5.4:
  mm/vmscan.c: In function `read_ctrl_pos':
  mm/vmscan.c:3166:728: error: call to `__compiletime_assert_887' declared with attribute error: min(tier, 4U - 1) signedness error

Link: https://lkml.kernel.org/r/62726950F697595A+20250507040827.1147510-1-wangyuli@uniontech.com
Fixes: 37a260870f2c ("mm/mglru: rework type selection")
Signed-off-by: WangYuli <wangyuli@uniontech.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/vmscan.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/vmscan.c~mm-vmscan-avoid-signedness-error-for-gcc-54
+++ a/mm/vmscan.c
@@ -3163,7 +3163,7 @@ static void read_ctrl_pos(struct lruvec
 	pos->gain = gain;
 	pos->refaulted = pos->total = 0;
 
-	for (i = tier % MAX_NR_TIERS; i <= min(tier, MAX_NR_TIERS - 1); i++) {
+	for (i = tier % MAX_NR_TIERS; i <= min_t(int, tier, MAX_NR_TIERS - 1); i++) {
 		pos->refaulted += lrugen->avg_refaulted[type][i] +
 				  atomic_long_read(&lrugen->refaulted[hist][type][i]);
 		pos->total += lrugen->avg_total[type][i] +
_

Patches currently in -mm which might be from wangyuli@uniontech.com are

mm-vmscan-avoid-signedness-error-for-gcc-54.patch
ocfs2-o2net_idle_timer-rename-del_timer_sync-in-comment.patch
treewide-fix-typo-previlege.patch