From: James Bottomley <James.Bottomley@suse.de>
Date: Mon, 25 Jan 2010 17:42:22 +0000 (-0600)
Subject: arm: add mm API for DMA to vmalloc/vmap areas
X-Git-Tag: firefly_0821_release~9833^2~3105^2~2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=252a9afff76097667429b583e8b5b170b47665a4;p=firefly-linux-kernel-4.4.55.git

arm: add mm API for DMA to vmalloc/vmap areas

ARM cannot prevent cache movein, so this patch implements both the
flush and invalidate pieces of the API.

Signed-off-by: James Bottomley <James.Bottomley@suse.de>
---

diff --git a/arch/arm/include/asm/cacheflush.h b/arch/arm/include/asm/cacheflush.h
index 730aefcfbee3..4ae503cb1b8a 100644
--- a/arch/arm/include/asm/cacheflush.h
+++ b/arch/arm/include/asm/cacheflush.h
@@ -432,6 +432,16 @@ static inline void __flush_icache_all(void)
 	    : "r" (0));
 #endif
 }
+static inline void flush_kernel_vmap_range(void *addr, int size)
+{
+	if ((cache_is_vivt() || cache_is_vipt_aliasing()))
+	  __cpuc_flush_dcache_area(addr, (size_t)size);
+}
+static inline void invalidate_kernel_vmap_range(void *addr, int size)
+{
+	if ((cache_is_vivt() || cache_is_vipt_aliasing()))
+	  __cpuc_flush_dcache_area(addr, (size_t)size);
+}
 
 #define ARCH_HAS_FLUSH_ANON_PAGE
 static inline void flush_anon_page(struct vm_area_struct *vma,