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arm64: dma-mapping: Mark atomic_pool as __ro_after_init

Message ID 1502700947-22654-2-git-send-email-vladimir.murzin@arm.com (mailing list archive)
State New, archived
Headers show

Commit Message

Vladimir Murzin Aug. 14, 2017, 8:55 a.m. UTC 
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>
---
 arch/arm64/mm/dma-mapping.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c
index 7038e1a..614af88 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;