linux-kernel - [PATCH] arch: arm: reuse addr variable in pfn

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Date:   Mon,  2 Sep 2019 18:46:22 +0200
From:   Clemens Gruber <clemens.gruber@...ruber.com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org,
        Clemens Gruber <clemens.gruber@...ruber.com>,
        Russell King <linux@...linux.org.uk>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        zhaoyang <huangzhaoyang@...il.com>
Subject: [PATCH] arch: arm: reuse addr variable in pfn_valid

Avoid calling __pfn_to_phys twice.

Cc: Russell King <linux@...linux.org.uk>
Cc: Mike Rapoport <rppt@...ux.ibm.com>
Cc: zhaoyang <huangzhaoyang@...il.com>
Signed-off-by: Clemens Gruber <clemens.gruber@...ruber.com>
---
 arch/arm/mm/init.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 98e17388a563..a5fe2bdc76de 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -179,7 +179,7 @@ int pfn_valid(unsigned long pfn)
 	if (__phys_to_pfn(addr) != pfn)
 		return 0;
 
-	return memblock_is_map_memory(__pfn_to_phys(pfn));
+	return memblock_is_map_memory(addr);
 }
 EXPORT_SYMBOL(pfn_valid);
 #endif
-- 
2.23.0