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-rw-r--r--include/asm-generic/percpu.h53
1 files changed, 30 insertions, 23 deletions
diff --git a/include/asm-generic/percpu.h b/include/asm-generic/percpu.h
index 4d9f233c4ba8..40e887068da2 100644
--- a/include/asm-generic/percpu.h
+++ b/include/asm-generic/percpu.h
@@ -65,6 +65,11 @@ extern void setup_per_cpu_areas(void);
#define PER_CPU_DEF_ATTRIBUTES
#endif
+#define raw_cpu_generic_read(pcp) \
+({ \
+ *raw_cpu_ptr(&(pcp)); \
+})
+
#define raw_cpu_generic_to_op(pcp, val, op) \
do { \
*raw_cpu_ptr(&(pcp)) op val; \
@@ -72,34 +77,39 @@ do { \
#define raw_cpu_generic_add_return(pcp, val) \
({ \
- raw_cpu_add(pcp, val); \
- raw_cpu_read(pcp); \
+ typeof(&(pcp)) __p = raw_cpu_ptr(&(pcp)); \
+ \
+ *__p += val; \
+ *__p; \
})
#define raw_cpu_generic_xchg(pcp, nval) \
({ \
+ typeof(&(pcp)) __p = raw_cpu_ptr(&(pcp)); \
typeof(pcp) __ret; \
- __ret = raw_cpu_read(pcp); \
- raw_cpu_write(pcp, nval); \
+ __ret = *__p; \
+ *__p = nval; \
__ret; \
})
#define raw_cpu_generic_cmpxchg(pcp, oval, nval) \
({ \
+ typeof(&(pcp)) __p = raw_cpu_ptr(&(pcp)); \
typeof(pcp) __ret; \
- __ret = raw_cpu_read(pcp); \
+ __ret = *__p; \
if (__ret == (oval)) \
- raw_cpu_write(pcp, nval); \
+ *__p = nval; \
__ret; \
})
#define raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \
({ \
+ typeof(&(pcp1)) __p1 = raw_cpu_ptr(&(pcp1)); \
+ typeof(&(pcp2)) __p2 = raw_cpu_ptr(&(pcp2)); \
int __ret = 0; \
- if (raw_cpu_read(pcp1) == (oval1) && \
- raw_cpu_read(pcp2) == (oval2)) { \
- raw_cpu_write(pcp1, nval1); \
- raw_cpu_write(pcp2, nval2); \
+ if (*__p1 == (oval1) && *__p2 == (oval2)) { \
+ *__p1 = nval1; \
+ *__p2 = nval2; \
__ret = 1; \
} \
(__ret); \
@@ -109,7 +119,7 @@ do { \
({ \
typeof(pcp) __ret; \
preempt_disable(); \
- __ret = *this_cpu_ptr(&(pcp)); \
+ __ret = raw_cpu_generic_read(pcp); \
preempt_enable(); \
__ret; \
})
@@ -118,17 +128,17 @@ do { \
do { \
unsigned long __flags; \
raw_local_irq_save(__flags); \
- *raw_cpu_ptr(&(pcp)) op val; \
+ raw_cpu_generic_to_op(pcp, val, op); \
raw_local_irq_restore(__flags); \
} while (0)
+
#define this_cpu_generic_add_return(pcp, val) \
({ \
typeof(pcp) __ret; \
unsigned long __flags; \
raw_local_irq_save(__flags); \
- raw_cpu_add(pcp, val); \
- __ret = raw_cpu_read(pcp); \
+ __ret = raw_cpu_generic_add_return(pcp, val); \
raw_local_irq_restore(__flags); \
__ret; \
})
@@ -138,8 +148,7 @@ do { \
typeof(pcp) __ret; \
unsigned long __flags; \
raw_local_irq_save(__flags); \
- __ret = raw_cpu_read(pcp); \
- raw_cpu_write(pcp, nval); \
+ __ret = raw_cpu_generic_xchg(pcp, nval); \
raw_local_irq_restore(__flags); \
__ret; \
})
@@ -149,9 +158,7 @@ do { \
typeof(pcp) __ret; \
unsigned long __flags; \
raw_local_irq_save(__flags); \
- __ret = raw_cpu_read(pcp); \
- if (__ret == (oval)) \
- raw_cpu_write(pcp, nval); \
+ __ret = raw_cpu_generic_cmpxchg(pcp, oval, nval); \
raw_local_irq_restore(__flags); \
__ret; \
})
@@ -168,16 +175,16 @@ do { \
})
#ifndef raw_cpu_read_1
-#define raw_cpu_read_1(pcp) (*raw_cpu_ptr(&(pcp)))
+#define raw_cpu_read_1(pcp) raw_cpu_generic_read(pcp)
#endif
#ifndef raw_cpu_read_2
-#define raw_cpu_read_2(pcp) (*raw_cpu_ptr(&(pcp)))
+#define raw_cpu_read_2(pcp) raw_cpu_generic_read(pcp)
#endif
#ifndef raw_cpu_read_4
-#define raw_cpu_read_4(pcp) (*raw_cpu_ptr(&(pcp)))
+#define raw_cpu_read_4(pcp) raw_cpu_generic_read(pcp)
#endif
#ifndef raw_cpu_read_8
-#define raw_cpu_read_8(pcp) (*raw_cpu_ptr(&(pcp)))
+#define raw_cpu_read_8(pcp) raw_cpu_generic_read(pcp)
#endif
#ifndef raw_cpu_write_1