[PATCH] m32r: fix build failure

[Sudip Mukherjee <sudipm.mukherjee@gmail.com>]

m32r allmodconfig build was failing with the error:
ERROR: "smp_flush_cache_all" [drivers/misc/lkdtm.ko] undefined!

lkdtm driver at drivers/misc is using flush_icache_range() which for
m32r is defined as smp_flush_cache_all() if CONFIG_SMP is defined.
But as smp_flush_cache_all() was not exported so the build was failing
with the error of undefined symbol.

Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
---

Hi Andrew,
as usual sending the patch to you as m32r arch is orphan.
build log is at:
https://travis-ci.org/sudipm-mukherjee/parport/jobs/132180911

 arch/m32r/kernel/smp.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/m32r/kernel/smp.c b/arch/m32r/kernel/smp.c
index 62d6961..564052e 100644
--- a/arch/m32r/kernel/smp.c
+++ b/arch/m32r/kernel/smp.c
@@ -164,6 +164,7 @@ void smp_flush_cache_all(void)
 	spin_unlock(&flushcache_lock);
 	preempt_enable();
 }
+EXPORT_SYMBOL(smp_flush_cache_all);
 
 void smp_flush_cache_all_interrupt(void)
 {
-- 
1.9.1