linux-kernel - [PATCH] um: define set_pte_at() as a static inline function, not a macro

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Message-Id: <20190313101439.7092-1-brgl@bgdev.pl>
Date:   Wed, 13 Mar 2019 11:14:39 +0100
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Jeff Dike <jdike@...toit.com>, Richard Weinberger <richard@....at>,
        Anton Ivanov <anton.ivanov@...bridgegreys.com>
Cc:     linux-um@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: [PATCH] um: define set_pte_at() as a static inline function, not a macro

From: Bartosz Golaszewski <bgolaszewski@...libre.com>

When defined as macro, the mm argument is unused and subsequently the
variable passed as mm is considered unused by the compiler. This fixes
a build warning.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
---
 arch/um/include/asm/pgtable.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/um/include/asm/pgtable.h b/arch/um/include/asm/pgtable.h
index 9c04562310b3..b377df76cc28 100644
--- a/arch/um/include/asm/pgtable.h
+++ b/arch/um/include/asm/pgtable.h
@@ -263,7 +263,12 @@ static inline void set_pte(pte_t *pteptr, pte_t pteval)
 	*pteptr = pte_mknewpage(*pteptr);
 	if(pte_present(*pteptr)) *pteptr = pte_mknewprot(*pteptr);
 }
-#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
+
+static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
+			      pte_t *pteptr, pte_t pteval)
+{
+	set_pte(pteptr, pteval);
+}
 
 #define __HAVE_ARCH_PTE_SAME
 static inline int pte_same(pte_t pte_a, pte_t pte_b)
-- 
2.20.1