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arm64: dma-mapping: Mark atomic_pool as __ro_after_init
author
Vladimir Murzin
<vladimir.murzin@arm.com>
Mon, 14 Aug 2017 08:55:47 +0000
(09:55 +0100)
committer
Catalin Marinas
<catalin.marinas@arm.com>
Mon, 21 Aug 2017 15:24:53 +0000
(16:24 +0100)
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>
arch/arm64/mm/dma-mapping.c
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diff --git
a/arch/arm64/mm/dma-mapping.c
b/arch/arm64/mm/dma-mapping.c
index
7038e1a
..
614af88
100644
(file)
--- 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;