3 files changed, 8 insertions, 2 deletions

diff --git a/fs/read_write.c b/fs/read_write.c
index e9c9e2a667ce..07c53db04ec1 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -697,10 +697,12 @@ static ssize_t do_iter_readv_writev(struct file *filp, struct iov_iter *iter,
         struct kiocb kiocb;
         ssize_t ret;
 
-        if (flags)
+        if (flags & ~RWF_HIPRI)
                 return -EOPNOTSUPP;
 
         init_sync_kiocb(&kiocb, filp);
+        if (flags & RWF_HIPRI)
+                kiocb.ki_flags |= IOCB_HIPRI;
         kiocb.ki_pos = *ppos;
 
         ret = fn(&kiocb, iter);
@@ -715,7 +717,7 @@ static ssize_t do_loop_readv_writev(struct file *filp, struct iov_iter *iter,
 {
         ssize_t ret = 0;
 
-        if (flags)
+        if (flags & ~RWF_HIPRI)
                 return -EOPNOTSUPP;
 
         while (iov_iter_count(iter)) {
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 6ec87964644f..337de88ff50f 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -320,6 +320,7 @@ struct writeback_control;
 #define IOCB_EVENTFD            (1 << 0)
 #define IOCB_APPEND             (1 << 1)
 #define IOCB_DIRECT             (1 << 2)
+#define IOCB_HIPRI              (1 << 3)
 
 struct kiocb {
         struct file             *ki_filp;
diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h
index 41e0433b4a83..847c656729f8 100644
--- a/include/uapi/linux/fs.h
+++ b/include/uapi/linux/fs.h
@@ -305,4 +305,7 @@ struct fsxattr {
 #define SYNC_FILE_RANGE_WRITE           2
 #define SYNC_FILE_RANGE_WAIT_AFTER      4
 
+/* flags for preadv2/pwritev2: */
+#define RWF_HIPRI                       0x00000001 /* high priority request, poll if possible */
+
 #endif /* _UAPI_LINUX_FS_H */