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Diffstat (limited to 'include/linux/percpu.h')
-rw-r--r--include/linux/percpu.h23
1 files changed, 14 insertions, 9 deletions
diff --git a/include/linux/percpu.h b/include/linux/percpu.h
index e12410e55e05..f965f833a643 100644
--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -27,10 +27,13 @@
* we force a syntax error here if it isn't.
*/
#define get_cpu_var(var) (*({ \
- extern int simple_identifier_##var(void); \
preempt_disable(); \
&__get_cpu_var(var); }))
-#define put_cpu_var(var) preempt_enable()
+
+#define put_cpu_var(var) do { \
+ (void)(var); \
+ preempt_enable(); \
+} while (0)
#ifdef CONFIG_SMP
@@ -182,17 +185,19 @@ static inline void *pcpu_lpage_remapped(void *kaddr)
#ifndef percpu_read
# define percpu_read(var) \
({ \
- typeof(var) __tmp_var__; \
- __tmp_var__ = get_cpu_var(var); \
- put_cpu_var(var); \
- __tmp_var__; \
+ typeof(var) *pr_ptr__ = &(var); \
+ typeof(var) pr_ret__; \
+ pr_ret__ = get_cpu_var(*pr_ptr__); \
+ put_cpu_var(*pr_ptr__); \
+ pr_ret__; \
})
#endif
#define __percpu_generic_to_op(var, val, op) \
do { \
- get_cpu_var(var) op val; \
- put_cpu_var(var); \
+ typeof(var) *pgto_ptr__ = &(var); \
+ get_cpu_var(*pgto_ptr__) op val; \
+ put_cpu_var(*pgto_ptr__); \
} while (0)
#ifndef percpu_write
@@ -304,7 +309,7 @@ do { \
#define _this_cpu_generic_to_op(pcp, val, op) \
do { \
preempt_disable(); \
- *__this_cpu_ptr(&pcp) op val; \
+ *__this_cpu_ptr(&(pcp)) op val; \
preempt_enable(); \
} while (0)