1 files changed, 33 insertions, 11 deletions

diff --git a/arch/arm64/include/asm/percpu.h b/arch/arm64/include/asm/percpu.h
index 09da25bc596f..4fde8c1df97f 100644
--- a/arch/arm64/include/asm/percpu.h
+++ b/arch/arm64/include/asm/percpu.h
@@ -204,25 +204,47 @@ static inline unsigned long __percpu_xchg(void *ptr, unsigned long val,
         return ret;
 }
 
+#define _percpu_read(pcp)                                               \
+({                                                                      \
+        typeof(pcp) __retval;                                           \
+        preempt_disable();                                              \
+        __retval = (typeof(pcp))__percpu_read(raw_cpu_ptr(&(pcp)),      \
+                                              sizeof(pcp));             \
+        preempt_enable();                                               \
+        __retval;                                                       \
+})
+
+#define _percpu_write(pcp, val)                                         \
+do {                                                                    \
+        preempt_disable();                                              \
+        __percpu_write(raw_cpu_ptr(&(pcp)), (unsigned long)(val),       \
+                                sizeof(pcp));                           \
+        preempt_enable();                                               \
+} while(0)                                                              \
+
+#define _pcp_protect(operation, pcp, val)                       \
+({                                                              \
+        typeof(pcp) __retval;                                   \
+        preempt_disable();                                      \
+        __retval = (typeof(pcp))operation(raw_cpu_ptr(&(pcp)),  \
+                                          (val), sizeof(pcp));  \
+        preempt_enable();                                       \
+        __retval;                                               \
+})
+
 #define _percpu_add(pcp, val) \
-        __percpu_add(raw_cpu_ptr(&(pcp)), val, sizeof(pcp))
+        _pcp_protect(__percpu_add, pcp, val)
 
-#define _percpu_add_return(pcp, val) (typeof(pcp)) (_percpu_add(pcp, val))
+#define _percpu_add_return(pcp, val) _percpu_add(pcp, val)
 
 #define _percpu_and(pcp, val) \
-        __percpu_and(raw_cpu_ptr(&(pcp)), val, sizeof(pcp))
+        _pcp_protect(__percpu_and, pcp, val)
 
 #define _percpu_or(pcp, val) \
-        __percpu_or(raw_cpu_ptr(&(pcp)), val, sizeof(pcp))
-
-#define _percpu_read(pcp) (typeof(pcp)) \
-        (__percpu_read(raw_cpu_ptr(&(pcp)), sizeof(pcp)))
-
-#define _percpu_write(pcp, val) \
-        __percpu_write(raw_cpu_ptr(&(pcp)), (unsigned long)(val), sizeof(pcp))
+        _pcp_protect(__percpu_or, pcp, val)
 
 #define _percpu_xchg(pcp, val) (typeof(pcp)) \
-        (__percpu_xchg(raw_cpu_ptr(&(pcp)), (unsigned long)(val), sizeof(pcp)))
+        _pcp_protect(__percpu_xchg, pcp, (unsigned long)(val))
 
 #define this_cpu_add_1(pcp, val) _percpu_add(pcp, val)
 #define this_cpu_add_2(pcp, val) _percpu_add(pcp, val)