Blackfin arch: disable pthread stack check for SMP at runtime

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/arch/blackfin/include/asm/system.h b/arch/blackfin/include/asm/system.h
index aa7d87b62b28..812e6e6e2cee 100644
--- a/arch/blackfin/include/asm/system.h
+++ b/arch/blackfin/include/asm/system.h
@@ -197,6 +197,7 @@ static inline unsigned long __xchg(unsigned long x, volatile void *ptr,
 
 asmlinkage struct task_struct *resume(struct task_struct *prev, struct task_struct *next);
 
+#ifndef CONFIG_SMP
 #define switch_to(prev,next,last) \
 do {    \
         memcpy (&task_thread_info(prev)->l1_task_info, L1_SCRATCH_TASK_INFO, \
@@ -205,5 +206,11 @@ do {    \
                 sizeof *L1_SCRATCH_TASK_INFO); \
         (last) = resume (prev, next);   \
 } while (0)
+#else
+#define switch_to(prev, next, last) \
+do {    \
+        (last) = resume(prev, next);   \
+} while (0)
+#endif
 
 #endif  /* _BLACKFIN_SYSTEM_H */