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-rw-r--r--include/linux/sem.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/sem.h b/include/linux/sem.h
index 8a4adbef8a0f..f2961afa2f66 100644
--- a/include/linux/sem.h
+++ b/include/linux/sem.h
@@ -79,6 +79,7 @@ struct seminfo {
#ifdef __KERNEL__
#include <asm/atomic.h>
#include <linux/rcupdate.h>
+#include <linux/cache.h>
struct task_struct;
@@ -91,7 +92,8 @@ struct sem {
/* One sem_array data structure for each set of semaphores in the system. */
struct sem_array {
- struct kern_ipc_perm sem_perm; /* permissions .. see ipc.h */
+ struct kern_ipc_perm ____cacheline_aligned_in_smp
+ sem_perm; /* permissions .. see ipc.h */
time_t sem_otime; /* last semop time */
time_t sem_ctime; /* last change time */
struct sem *sem_base; /* ptr to first semaphore in array */