linux-kernel - [RFC PATCH v2 1/5] new helper: iov_iter

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Date:	Mon, 16 Mar 2015 18:20:19 -0700
From:	Omar Sandoval <osandov@...ndov.com>
To:	Al Viro <viro@...IV.linux.org.uk>
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	Omar Sandoval <osandov@...ndov.com>
Subject: [RFC PATCH v2 1/5] new helper: iov_iter_rw()

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

Signed-off-by: Omar Sandoval <osandov@...ndov.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

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