ARM: 5988/1: pgprot_dmacoherent() for non-mmu builds
Commit 26a26d329688ab018e068b412b03d43d7c299f0a ("dma-mapping: switch
ARMv7 DMA mappings to retain 'memory' attribute") added a new macro,
pgprot_dmacoherent(), to correctly map DMA memory. The non-mmu pgtable
support code also needs to implement this macro, otherwise when
compiling you get:
CC arch/arm/mm/dma-mapping.o
arch/arm/mm/dma-mapping.c: In function 'dma_alloc_coherent':
arch/arm/mm/dma-mapping.c:320: error: implicit declaration of function 'pgprot_dmacoherent'
arch/arm/mm/dma-mapping.c:320: error: 'pgprot_kernel' undeclared (first use in this function)
arch/arm/mm/dma-mapping.c:320: error: (Each undeclared identifier is reported only once
arch/arm/mm/dma-mapping.c:320: error: for each function it appears in.)
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/include/asm/pgtable-nommu.h b/arch/arm/include/asm/pgtable-nommu.h
index 013cfcd..ffc0e857 100644
--- a/arch/arm/include/asm/pgtable-nommu.h
+++ b/arch/arm/include/asm/pgtable-nommu.h
@@ -67,6 +67,7 @@
*/
#define pgprot_noncached(prot) __pgprot(0)
#define pgprot_writecombine(prot) __pgprot(0)
+#define pgprot_dmacoherent(prot) __pgprot(0)
/*