new helper: iter_is_iovec()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-12-17 04:46:46 -05:00
parent b1bc6d7f16
commit 777eda2c5b
3 changed files with 7 additions and 2 deletions
--- a/include/linux/uio.h
+++ b/include/linux/uio.h
@@ -101,6 +101,11 @@ static inline size_t iov_iter_count(struct iov_iter *i)
 	return i->count;
 }

+static inline bool iter_is_iovec(struct iov_iter *i)
+{
+	return !(i->type & (ITER_BVEC | ITER_KVEC));
+}
+
 /*
 * Cap the iov_iter by given limit; note that the second argument is
 * *not* the new size - it's upper limit for such.  Passing it a value