vfs: add the RWF_HIPRI flag for preadv2/pwritev2

[cascardo/linux.git] / fs / read_write.c

diff --git a/fs/read_write.c b/fs/read_write.c
index e9c9e2a..07c53db 100644 (file)
--- 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)) {