[PATCH] m32r: fix build failure

[Sudip Mukherjee]

From: Sudip Mukherjee <sudipm.mukherjee@xxxxxxxxx>

The allmodconfig build of m32r is failing with the error:
lib/mpi/mpih-div.o: In function 'mpihelp_divrem':
mpih-div.c:(.text+0x40): undefined reference to 'abort'
mpih-div.c:(.text+0x40): relocation truncated to fit:
	R_M32R_26_PCREL_RELA against undefined symbol 'abort'

The function 'abort' was never defined for the m32r architecture.

Create 'abort' as is done in other arch like 'arm' and 'unicore32'.

Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@xxxxxxxxx>
---

The build log of next-20170929 is at:
https://travis-ci.org/sudipm-mukherjee/parport/jobs/281164217

 arch/m32r/kernel/traps.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/m32r/kernel/traps.c b/arch/m32r/kernel/traps.c
index 647dd94..72b96f2 100644
--- a/arch/m32r/kernel/traps.c
+++ b/arch/m32r/kernel/traps.c
@@ -114,6 +114,15 @@ static void set_eit_vector_entries(void)
 	_flush_cache_copyback_all();
 }
 
+void abort(void)
+{
+	BUG();
+
+	/* if that doesn't kill us, halt */
+	panic("Oops failed to kill thread");
+}
+EXPORT_SYMBOL(abort);
+
 void __init trap_init(void)
 {
 	set_eit_vector_entries();
-- 
2.7.4