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>
diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig
index 6b97aa8..672b7b0 100644
--- a/arch/blackfin/Kconfig
+++ b/arch/blackfin/Kconfig
@@ -808,7 +808,7 @@
config EXCEPTION_L1_SCRATCH
bool "Locate exception stack in L1 Scratch Memory"
default n
- depends on !APP_STACK_L1 && !SYSCALL_TAB_L1
+ depends on !APP_STACK_L1
help
Whenever an exception occurs, use the L1 Scratch memory for
stack storage. You cannot place the stacks of FLAT binaries
diff --git a/arch/blackfin/mach-common/entry.S b/arch/blackfin/mach-common/entry.S
index a063a43..f0636fd 100644
--- a/arch/blackfin/mach-common/entry.S
+++ b/arch/blackfin/mach-common/entry.S
@@ -36,7 +36,6 @@
#include <linux/init.h>
#include <linux/linkage.h>
#include <linux/unistd.h>
-#include <linux/threads.h>
#include <asm/blackfin.h>
#include <asm/errno.h>
#include <asm/fixed_code.h>
@@ -1588,19 +1587,3 @@
.long _sys_ni_syscall
.endr
END(_sys_call_table)
-
-#ifdef CONFIG_EXCEPTION_L1_SCRATCH
-/* .section .l1.bss.scratch */
-.set _exception_stack_top, L1_SCRATCH_START + L1_SCRATCH_LENGTH
-#else
-#ifdef CONFIG_SYSCALL_TAB_L1
-.section .l1.bss
-#else
-.bss
-#endif
-ENTRY(_exception_stack)
- .rept 1024 * NR_CPUS
- .long 0
- .endr
-_exception_stack_top:
-#endif
diff --git a/arch/blackfin/mm/init.c b/arch/blackfin/mm/init.c
index 9c3629b..00543c8 100644
--- a/arch/blackfin/mm/init.c
+++ b/arch/blackfin/mm/init.c
@@ -52,9 +52,14 @@
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 @@
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;