Blackfin arch: Print out doublefault addresses, so debug can occur

Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/blackfin/mach-common/head.S b/arch/blackfin/mach-common/head.S
index 2c69ad49894e..fb7e2d426999 100644
--- a/arch/blackfin/mach-common/head.S
+++ b/arch/blackfin/mach-common/head.S
@@ -90,6 +90,12 @@ ENTRY(__start)
         [p0] = R0;
         SSYNC;
 
+        /* Save RETX, in case of doublefault */
+        p0.l = ___retx;
+        p0.h = ___retx;
+        R0 = RETX;
+        [P0] = R0;
+
         /* Let each Blackfin family do its own thing */
         call _mach_early_start;