1 files changed, 38 insertions, 0 deletions

diff --git a/include/asm-generic/sembuf.h b/include/asm-generic/sembuf.h
new file mode 100644
index 000000000000..4cb2c13e5090
--- /dev/null
+++ b/include/asm-generic/sembuf.h
@@ -0,0 +1,38 @@
+#ifndef __ASM_GENERIC_SEMBUF_H
+#define __ASM_GENERIC_SEMBUF_H
+
+#include <asm/bitsperlong.h>
+
+/*
+ * The semid64_ds structure for x86 architecture.
+ * Note extra padding because this structure is passed back and forth
+ * between kernel and user space.
+ *
+ * semid64_ds was originally meant to be architecture specific, but
+ * everyone just ended up making identical copies without specific
+ * optimizations, so we may just as well all use the same one.
+ *
+ * 64 bit architectures typically define a 64 bit __kernel_time_t,
+ * so they do not need the first two padding words.
+ * On big-endian systems, the padding is in the wrong place.
+ *
+ * Pad space is left for:
+ * - 64-bit time_t to solve y2038 problem
+ * - 2 miscellaneous 32-bit values
+ */
+struct semid64_ds {
+        struct ipc64_perm sem_perm;     /* permissions .. see ipc.h */
+        __kernel_time_t sem_otime;      /* last semop time */
+#if __BITS_PER_LONG != 64
+        unsigned long   __unused1;
+#endif
+        __kernel_time_t sem_ctime;      /* last change time */
+#if __BITS_PER_LONG != 64
+        unsigned long   __unused2;
+#endif
+        unsigned long   sem_nsems;      /* no. of semaphores in array */
+        unsigned long   __unused3;
+        unsigned long   __unused4;
+};
+
+#endif /* __ASM_GENERIC_SEMBUF_H */