linux-kernel - [PATCH 2/3] mm/hugetlb: Remove unnecessary if condition

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Message-ID: <20260115181438.223620-3-joshua.hahnjy@gmail.com>
Date: Thu, 15 Jan 2026 13:14:36 -0500
From: Joshua Hahn <joshua.hahnjy@...il.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: David Hildenbrand <david@...nel.org>,
	Muchun Song <muchun.song@...ux.dev>,
	Oscar Salvador <osalvador@...e.de>,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: [PATCH 2/3] mm/hugetlb: Remove unnecessary if condition

if (map_chg) is always true, since it is nested in another if statement
which checks for it already. Remove the check and un-indent for readability.

if (unlikely(map_chg == MAP_CHG_NEEDED && retval == 0)) {
	...

	if (map_chg) {
		...
	}
}

No functional change intended.

Signed-off-by: Joshua Hahn <joshua.hahnjy@...il.com>
---
 mm/hugetlb.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 88b9e997c9da..432a5054ca1d 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -3019,13 +3019,11 @@ struct folio *alloc_hugetlb_folio(struct vm_area_struct *vma,
 
 			rsv_adjust = hugepage_subpool_put_pages(spool, 1);
 			hugetlb_acct_memory(h, -rsv_adjust);
-			if (map_chg) {
-				spin_lock_irq(&hugetlb_lock);
-				hugetlb_cgroup_uncharge_folio_rsvd(
-				    hstate_index(h), pages_per_huge_page(h),
-				    folio);
-				spin_unlock_irq(&hugetlb_lock);
-			}
+			spin_lock_irq(&hugetlb_lock);
+			hugetlb_cgroup_uncharge_folio_rsvd(
+			    hstate_index(h), pages_per_huge_page(h),
+			    folio);
+			spin_unlock_irq(&hugetlb_lock);
 		}
 	}
 
-- 
2.47.3