[RFC PATCH v2 1/5] new helper: iov_iter_rw()

From: Omar Sandoval <osandov@osandov.com>
To: Al Viro <viro@ZenIV.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
	Omar Sandoval <osandov@osandov.com>
Subject: [RFC PATCH v2 1/5] new helper: iov_iter_rw()
Date: Mon, 16 Mar 2015 18:20:19 -0700	[thread overview]
Message-ID: <c490fdcbd22c03345c8718f11a4f45b12978d131.1426553966.git.osandov@osandov.com> (raw)
In-Reply-To: <20150316173605.GX29656@ZenIV.linux.org.uk>

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

Signed-off-by: Omar Sandoval <osandov@osandov.com>
---
Thanks, Al, this is much better. Anything else you'd like me to address
for this series?

 include/linux/uio.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/linux/uio.h b/include/linux/uio.h
index 7188029..3d80a36 100644
--- a/include/linux/uio.h
+++ b/include/linux/uio.h
@@ -111,6 +111,12 @@ static inline bool iter_is_iovec(struct iov_iter *i)
 }
 
 /*
+ * Get one of READ or WRITE out of iter->type without any other flags OR'd in
+ * with it.
+ */
+#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
  * greater than the amount of data in iov_iter is fine - it'll just do
-- 
2.3.3

