linux-kernel - [PATCH 1/2] riscv: process: use unsigned int instead of unsigned long for put

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Message-ID: <20250530205658.624195-2-cleger@rivosinc.com>
Date: Fri, 30 May 2025 22:56:57 +0200
From: Clément Léger <cleger@...osinc.com>
To: linux-riscv@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Cc: Clément Léger <cleger@...osinc.com>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	Alexandre Ghiti <alex@...ti.fr>
Subject: [PATCH 1/2] riscv: process: use unsigned int instead of unsigned long for put_user()

The specification of prctl() for GET_UNALIGN_CTL states that the value is
returned in an unsigned int * address passed as an unsigned long. Change
the type to match that and avoid an unaligned access as well.

Signed-off-by: Clément Léger <cleger@...osinc.com>
---
 arch/riscv/kernel/process.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/riscv/kernel/process.c b/arch/riscv/kernel/process.c
index 15d8f75902f8..9ee6d816b98b 100644
--- a/arch/riscv/kernel/process.c
+++ b/arch/riscv/kernel/process.c
@@ -57,7 +57,7 @@ int get_unalign_ctl(struct task_struct *tsk, unsigned long adr)
 	if (!unaligned_ctl_available())
 		return -EINVAL;
 
-	return put_user(tsk->thread.align_ctl, (unsigned long __user *)adr);
+	return put_user(tsk->thread.align_ctl, (unsigned int __user *)adr);
 }
 
 void __show_regs(struct pt_regs *regs)
-- 
2.49.0