Commit bd8e0ff9 authored by Omar Sandoval's avatar Omar Sandoval Committed by Al Viro
Browse files

new helper: iov_iter_rw() 



Get either READ or WRITE out of iter->type.

Signed-off-by: default avatarOmar Sandoval <osandov@osandov.com>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 84363182

include/linux/uio.h

+8 −0
Original line number Diff line number Diff line
@@ -111,6 +111,14 @@ static inline bool iter_is_iovec(struct iov_iter *i) 
	return !(i->type & (ITER_BVEC | ITER_KVEC));

}



/*

 * Get one of READ or WRITE out of iter->type without any other flags OR'd in

 * with it.

 *

 * The ?: is just for type safety.

 */

#define iov_iter_rw(i) ((0 ? (struct iov_iter *)0 : (i))->type & RW_MASK)



/*

 * 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