# \[PATCH RFC 3/6\] epoll: Add definition for epoll\_mod\_wait structures

- From: Fam Zheng \<hidden\>
- Date: 2015-01-20 09:57:55 
- List: linux-api
- Page: https://ratatoskr.run/linux-api/2015/01/91741
- Thread: https://ratatoskr.run/lkml/2015/01/91739/t.md

```text
Two structs involved in the coming syscall is defined. Flags in epoll_mod_cmd
are reserved, which makes better word alignment and may allow future extension.

Signed-off-by: Fam Zheng <redacted>
---
 include/uapi/linux/eventpoll.h | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/include/uapi/linux/eventpoll.h b/include/uapi/linux/eventpoll.h
index bc81fb2..e32a804 100644
--- a/include/uapi/linux/eventpoll.h
+++ b/include/uapi/linux/eventpoll.h
@@ -18,6 +18,8 @@
 #include <linux/fcntl.h>
 #include <linux/types.h>
 
+#include <linux/signal.h>
+
 /* Flags for epoll_create1.  */
 #define EPOLL_CLOEXEC O_CLOEXEC
 
@@ -61,6 +63,24 @@ struct epoll_event {
 	__u64 data;
 } EPOLL_PACKED;
 
+struct epoll_mod_cmd {
+	int flags;
+	int op;
+	int fd;
+	__u32 events;
+	__u64 data;
+	int error;
+} EPOLL_PACKED;
+
+struct epoll_wait_spec {
+	int maxevents;
+	struct epoll_event *events;
+	int clockid;
+	struct timespec timeout;
+	sigset_t *sigmask;
+	size_t sigsetsize;
+} EPOLL_PACKED;
+
 #ifdef CONFIG_PM_SLEEP
 static inline void ep_take_care_of_epollwakeup(struct epoll_event *epev)
 {
-- 
1.9.3
```