Blackfin: fix link failure due to CONFIG_EXCEPTION_L1_SCRATCH

Move exception stack mess from entry.S to init.c to fix link failure when
CONFIG_EXCEPTION_L1_SCRATCH is in use.

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

1 files changed, 12 insertions, 2 deletions

diff --git a/arch/blackfin/mm/init.c b/arch/blackfin/mm/init.c
index 9c3629b9a689..00543c813f4a 100644
--- a/arch/blackfin/mm/init.c
+++ b/arch/blackfin/mm/init.c
@@ -52,9 +52,14 @@ static unsigned long empty_bad_page_table;
 
 static unsigned long empty_bad_page;
 
-unsigned long empty_zero_page;
+static unsigned long empty_zero_page;
 
-extern unsigned long exception_stack[NR_CPUS][1024];
+#ifndef CONFIG_EXCEPTION_L1_SCRATCH
+#if defined CONFIG_SYSCALL_TAB_L1
+__attribute__((l1_data))
+#endif
+static unsigned long exception_stack[NR_CPUS][1024];
+#endif
 
 struct blackfin_pda cpu_pda[NR_CPUS];
 EXPORT_SYMBOL(cpu_pda);
@@ -117,7 +122,12 @@ asmlinkage void __init init_pda(void)
         cpu_pda[0].next = &cpu_pda[1];
         cpu_pda[1].next = &cpu_pda[0];
 
+#ifdef CONFIG_EXCEPTION_L1_SCRATCH
+        cpu_pda[cpu].ex_stack = (unsigned long *)(L1_SCRATCH_START + \
+                                        L1_SCRATCH_LENGTH);
+#else
         cpu_pda[cpu].ex_stack = exception_stack[cpu + 1];
+#endif
 
 #ifdef CONFIG_SMP
         cpu_pda[cpu].imask = 0x1f;