v4.19.13 snapshot.
diff --git a/include/linux/restart_block.h b/include/linux/restart_block.h
new file mode 100644
index 0000000..5d83d0c
--- /dev/null
+++ b/include/linux/restart_block.h
@@ -0,0 +1,60 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Common syscall restarting data
+ */
+#ifndef __LINUX_RESTART_BLOCK_H
+#define __LINUX_RESTART_BLOCK_H
+
+#include <linux/compiler.h>
+#include <linux/types.h>
+#include <linux/time64.h>
+
+struct timespec;
+struct compat_timespec;
+struct pollfd;
+
+enum timespec_type {
+ TT_NONE = 0,
+ TT_NATIVE = 1,
+ TT_COMPAT = 2,
+};
+
+/*
+ * System call restart block.
+ */
+struct restart_block {
+ long (*fn)(struct restart_block *);
+ union {
+ /* For futex_wait and futex_wait_requeue_pi */
+ struct {
+ u32 __user *uaddr;
+ u32 val;
+ u32 flags;
+ u32 bitset;
+ u64 time;
+ u32 __user *uaddr2;
+ } futex;
+ /* For nanosleep */
+ struct {
+ clockid_t clockid;
+ enum timespec_type type;
+ union {
+ struct __kernel_timespec __user *rmtp;
+ struct compat_timespec __user *compat_rmtp;
+ };
+ u64 expires;
+ } nanosleep;
+ /* For poll */
+ struct {
+ struct pollfd __user *ufds;
+ int nfds;
+ int has_timeout;
+ unsigned long tv_sec;
+ unsigned long tv_nsec;
+ } poll;
+ };
+};
+
+extern long do_no_restart_syscall(struct restart_block *parm);
+
+#endif /* __LINUX_RESTART_BLOCK_H */