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

Message ID c490fdcbd22c03345c8718f11a4f45b12978d131.1426553966.git.osandov@osandov.com (mailing list archive)
State New, archived
Headers show

Commit Message

Omar Sandoval March 17, 2015, 1:20 a.m. UTC
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(+)
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Patch

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