openrisc: head: use THREAD_SIZE instead of magic constant

The stack size was hard coded to 0x2000, use the standard THREAD_SIZE
definition loaded from thread_info.h.

Signed-off-by: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
[shorne@gmail.com: Added body to the commit message]
Signed-off-by: Stafford Horne <shorne@gmail.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/arch/openrisc/kernel/head.S b/arch/openrisc/kernel/head.S
index 2346c5b39095..63ba2d96a860 100644
--- a/arch/openrisc/kernel/head.S
+++ b/arch/openrisc/kernel/head.S
@@ -24,6 +24,7 @@
 #include <asm/page.h>
 #include <asm/mmu.h>
 #include <asm/pgtable.h>
+#include <asm/thread_info.h>
 #include <asm/cache.h>
 #include <asm/spr_defs.h>
 #include <asm/asm-offsets.h>
@@ -486,7 +487,8 @@ _start:
         /*
          * set up initial ksp and current
          */
-        LOAD_SYMBOL_2_GPR(r1,init_thread_union+0x2000)  // setup kernel stack
+        /* setup kernel stack */
+        LOAD_SYMBOL_2_GPR(r1,init_thread_union + THREAD_SIZE)
         LOAD_SYMBOL_2_GPR(r10,init_thread_union)        // setup current
         tophys  (r31,r10)
         l.sw    TI_KSP(r31), r1