sparc: fix fallout from system.h split
Fixes this build error:
kernel/signal.c: In function 'ptrace_stop':
kernel/signal.c:1860:3: error: implicit declaration of function 'synchronize_user_stack' [-Werror=implicit-function-declaration]
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/include/asm/ptrace.h b/arch/sparc/include/asm/ptrace.h
index ef8c7c0..9835adc 100644
--- a/arch/sparc/include/asm/ptrace.h
+++ b/arch/sparc/include/asm/ptrace.h
@@ -165,6 +165,7 @@
#ifdef __KERNEL__
#include <linux/threads.h>
+#include <asm/switch_to.h>
static inline int pt_regs_trap_type(struct pt_regs *regs)
{