1 files changed, 14 insertions, 4 deletions

diff --git a/arch/mips/include/asm/system.h b/arch/mips/include/asm/system.h
index cd30f83235bb..fcf5f98d90cc 100644
--- a/arch/mips/include/asm/system.h
+++ b/arch/mips/include/asm/system.h
@@ -32,6 +32,9 @@ extern asmlinkage void *resume(void *last, void *next, void *next_ti);
 
 struct task_struct;
 
+extern unsigned int ll_bit;
+extern struct task_struct *ll_task;
+
 #ifdef CONFIG_MIPS_MT_FPAFF
 
 /*
@@ -63,11 +66,18 @@ do {									\
 #define __mips_mt_fpaff_switch_to(prev) do { (void) (prev); } while (0)
 #endif
 
+#define __clear_software_ll_bit()                                       \
+do {                                                                    \
+        if (!__builtin_constant_p(cpu_has_llsc) || !cpu_has_llsc)       \
+                ll_bit = 0;                                             \
+} while (0)
+
 #define switch_to(prev, next, last)                                     \
 do {                                                                    \
         __mips_mt_fpaff_switch_to(prev);                                \
         if (cpu_has_dsp)                                                \
                 __save_dsp(prev);                                       \
+        __clear_software_ll_bit();                                      \
         (last) = resume(prev, next, task_thread_info(next));            \
 } while (0)
 
@@ -84,7 +94,7 @@ static inline unsigned long __xchg_u32(volatile int * m, unsigned int val)
 {
         __u32 retval;
 
-        if (cpu_has_llsc && R10000_LLSC_WAR) {
+        if (kernel_uses_llsc && R10000_LLSC_WAR) {
                 unsigned long dummy;
 
                 __asm__ __volatile__(
@@ -99,7 +109,7 @@ static inline unsigned long __xchg_u32(volatile int * m, unsigned int val)
                 : "=&r" (retval), "=m" (*m), "=&r" (dummy)
                 : "R" (*m), "Jr" (val)
                 : "memory");
-        } else if (cpu_has_llsc) {
+        } else if (kernel_uses_llsc) {
                 unsigned long dummy;
 
                 __asm__ __volatile__(
@@ -136,7 +146,7 @@ static inline __u64 __xchg_u64(volatile __u64 * m, __u64 val)
 {
         __u64 retval;
 
-        if (cpu_has_llsc && R10000_LLSC_WAR) {
+        if (kernel_uses_llsc && R10000_LLSC_WAR) {
                 unsigned long dummy;
 
                 __asm__ __volatile__(
@@ -149,7 +159,7 @@ static inline __u64 __xchg_u64(volatile __u64 * m, __u64 val)
                 : "=&r" (retval), "=m" (*m), "=&r" (dummy)
                 : "R" (*m), "Jr" (val)
                 : "memory");
-        } else if (cpu_has_llsc) {
+        } else if (kernel_uses_llsc) {
                 unsigned long dummy;
 
                 __asm__ __volatile__(