linux-kernel - [PATCH] arm64/mm: mark private VM_FAULT_X defines as vm_fault

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Message-Id: <20230502151909.128810-1-minhuadotchen@gmail.com>
Date:   Tue,  2 May 2023 23:19:06 +0800
From:   Min-Hua Chen <minhuadotchen@...il.com>
To:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>
Cc:     Min-Hua Chen <minhuadotchen@...il.com>,
        kernel test robot <lkp@...el.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] arm64/mm: mark private VM_FAULT_X defines as vm_fault_t

This patch fixes several sparse warnings for fault.c:

arch/arm64/mm/fault.c:493:24: sparse: warning: incorrect type in return expression (different base types)
arch/arm64/mm/fault.c:493:24: sparse:    expected restricted vm_fault_t
arch/arm64/mm/fault.c:493:24: sparse:    got int
arch/arm64/mm/fault.c:501:32: sparse: warning: incorrect type in return expression (different base types)
arch/arm64/mm/fault.c:501:32: sparse:    expected restricted vm_fault_t
arch/arm64/mm/fault.c:501:32: sparse:    got int
arch/arm64/mm/fault.c:503:32: sparse: warning: incorrect type in return expression (different base types)
arch/arm64/mm/fault.c:503:32: sparse:    expected restricted vm_fault_t
arch/arm64/mm/fault.c:503:32: sparse:    got int
arch/arm64/mm/fault.c:511:24: sparse: warning: incorrect type in return expression (different base types)
arch/arm64/mm/fault.c:511:24: sparse:    expected restricted vm_fault_t
arch/arm64/mm/fault.c:511:24: sparse:    got int
arch/arm64/mm/fault.c:670:13: sparse: warning: restricted vm_fault_t degrades to integer
arch/arm64/mm/fault.c:670:13: sparse: warning: restricted vm_fault_t degrades to integer
arch/arm64/mm/fault.c:713:39: sparse: warning: restricted vm_fault_t degrades to integer

Reported-by: kernel test robot <lkp@...el.com>
Signed-off-by: Min-Hua Chen <minhuadotchen@...il.com>
---
 arch/arm64/mm/fault.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
index 9e0db5c387e3..cb21ccd7940d 100644
--- a/arch/arm64/mm/fault.c
+++ b/arch/arm64/mm/fault.c
@@ -480,8 +480,8 @@ static void do_bad_area(unsigned long far, unsigned long esr,
 	}
 }
 
-#define VM_FAULT_BADMAP		0x010000
-#define VM_FAULT_BADACCESS	0x020000
+#define VM_FAULT_BADMAP		((__force vm_fault_t)0x010000)
+#define VM_FAULT_BADACCESS	((__force vm_fault_t)0x020000)
 
 static vm_fault_t __do_page_fault(struct mm_struct *mm, unsigned long addr,
 				  unsigned int mm_flags, unsigned long vm_flags,
-- 
2.34.1