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-rw-r--r--include/linux/blkdev.h2
-rw-r--r--include/linux/netdevice.h2
-rw-r--r--include/linux/smp.h8
3 files changed, 8 insertions, 4 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 25f6a0cb27d3..006fa09a641e 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -134,7 +134,7 @@ typedef __u32 __bitwise req_flags_t;
struct request {
struct list_head queuelist;
union {
- struct call_single_data csd;
+ call_single_data_t csd;
u64 fifo_time;
};
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 779b23595596..6557f320b66e 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -2774,7 +2774,7 @@ struct softnet_data {
unsigned int input_queue_head ____cacheline_aligned_in_smp;
/* Elements below can be accessed between CPUs for RPS/RFS */
- struct call_single_data csd ____cacheline_aligned_in_smp;
+ call_single_data_t csd ____cacheline_aligned_in_smp;
struct softnet_data *rps_ipi_next;
unsigned int cpu;
unsigned int input_queue_tail;
diff --git a/include/linux/smp.h b/include/linux/smp.h
index 68123c1fe549..98b1fe027fc9 100644
--- a/include/linux/smp.h
+++ b/include/linux/smp.h
@@ -14,13 +14,17 @@
#include <linux/llist.h>
typedef void (*smp_call_func_t)(void *info);
-struct call_single_data {
+struct __call_single_data {
struct llist_node llist;
smp_call_func_t func;
void *info;
unsigned int flags;
};
+/* Use __aligned() to avoid to use 2 cache lines for 1 csd */
+typedef struct __call_single_data call_single_data_t
+ __aligned(sizeof(struct __call_single_data));
+
/* total number of cpus in this system (may exceed NR_CPUS) */
extern unsigned int total_cpus;
@@ -48,7 +52,7 @@ void on_each_cpu_cond(bool (*cond_func)(int cpu, void *info),
smp_call_func_t func, void *info, bool wait,
gfp_t gfp_flags);
-int smp_call_function_single_async(int cpu, struct call_single_data *csd);
+int smp_call_function_single_async(int cpu, call_single_data_t *csd);
#ifdef CONFIG_SMP