[PATCH] arm: Export cache flush management symbols when !MULTI_CACHE

[PATCH] arm: Export cache flush management symbols when !MULTI_CACHE

[Pantelis Antoniou]

When compiling a kernel without CONFIG_MULTI_CACHE enabled the
dma access functions end up not being exported. Fix it.

Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com>
---
 arch/arm/kernel/setup.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 3f6cbb2..4540dad 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -931,3 +931,12 @@ const struct seq_operations cpuinfo_op = {
 	.stop	= c_stop,
 	.show	= c_show
 };
+
+/* export the cache management functions */
+#ifndef MULTI_CACHE
+
+EXPORT_SYMBOL(__glue(_CACHE,_dma_map_area));
+EXPORT_SYMBOL(__glue(_CACHE,_dma_unmap_area));
+EXPORT_SYMBOL(__glue(_CACHE,_dma_flush_range));
+
+#endif
-- 
1.7.12

[PATCH] arm: Export cache flush management symbols when !MULTI_CACHE

[Russell King - ARM Linux]

On Fri, Jan 04, 2013 at 12:32:33AM +0200, Pantelis Antoniou wrote:
> When compiling a kernel without CONFIG_MULTI_CACHE enabled the
> dma access functions end up not being exported. Fix it.

Actually, that's exactly how these are supposed to be: no driver should
_ever_ reference these symbols directly, they should all be done via
the DMA API, which internally uses these.  Therefore, none of these
should ever appear in a module.