linux-kernel - [PATCH RESEND v2 1/2] ucount: Fix atomic_long_inc

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Message-ID: <20250721174610.28361-1-ubizjak@gmail.com>
Date: Mon, 21 Jul 2025 19:45:57 +0200
From: Uros Bizjak <ubizjak@...il.com>
To: linux-kernel@...r.kernel.org
Cc: Uros Bizjak <ubizjak@...il.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	"Paul E. McKenney" <paulmck@...nel.org>,
	Alexey Gladkov <legion@...nel.org>,
	Roman Gushchin <roman.gushchin@...ux.dev>,
	MengEn Sun <mengensun@...cent.com>,
	Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH RESEND v2 1/2] ucount: Fix atomic_long_inc_below() argument type

The type of u argument of atomic_long_inc_below() should be long
to avoid unwanted truncation to int.

Fixes: f9c82a4ea89c ("Increase size of ucounts to atomic_long_t")
Signed-off-by: Uros Bizjak <ubizjak@...il.com>
Reviewed-by: "Eric W. Biederman" <ebiederm@...ssion.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: "Paul E. McKenney" <paulmck@...nel.org>
Cc: Alexey Gladkov <legion@...nel.org>
Cc: Roman Gushchin <roman.gushchin@...ux.dev>
Cc: MengEn Sun <mengensun@...cent.com>
Cc: "Thomas Weißschuh" <linux@...ssschuh.net>
---
 kernel/ucount.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/ucount.c b/kernel/ucount.c
index 8686e329b8f2..f629db485a07 100644
--- a/kernel/ucount.c
+++ b/kernel/ucount.c
@@ -199,7 +199,7 @@ void put_ucounts(struct ucounts *ucounts)
 	}
 }
 
-static inline bool atomic_long_inc_below(atomic_long_t *v, int u)
+static inline bool atomic_long_inc_below(atomic_long_t *v, long u)
 {
 	long c, old;
 	c = atomic_long_read(v);
-- 
2.50.1