From: Vladimir Murzin <vladimir.murzin@arm.com>
Date: Mon, 14 Aug 2017 08:55:47 +0000 (+0100)
Subject: arm64: dma-mapping: Mark atomic_pool as __ro_after_init
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=8165f70648da0a4a51e5871693781b2cc29b29d6;p=linux.git

arm64: dma-mapping: Mark atomic_pool as __ro_after_init

atomic_pool is setup once while init stage and never changed after
that, so it is good candidate for __ro_after_init

Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---

diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c
index 7038e1a613976..614af886b7ef4 100644
--- a/arch/arm64/mm/dma-mapping.c
+++ b/arch/arm64/mm/dma-mapping.c
@@ -42,7 +42,7 @@ static pgprot_t __get_dma_pgprot(unsigned long attrs, pgprot_t prot,
 	return prot;
 }
 
-static struct gen_pool *atomic_pool;
+static struct gen_pool *atomic_pool __ro_after_init;
 
 #define DEFAULT_DMA_COHERENT_POOL_SIZE  SZ_256K
 static size_t atomic_pool_size __initdata = DEFAULT_DMA_COHERENT_POOL_SIZE;