diff mbox series

[v4,3/6] uio: return status with iov truncation

Message ID 1595605762-17010-4-git-send-email-joshi.k@samsung.com (mailing list archive)
State New, archived
Headers show
Series zone-append support in io-uring and aio | expand

Commit Message

Kanchan Joshi July 24, 2020, 3:49 p.m. UTC 
From: SelvaKumar S <selvakuma.s1@samsung.com>

Make iov_iter_truncate to report whether it actually truncated.
This helps callers which want to process the iov_iter in its entirety.

Signed-off-by: SelvaKumar S <selvakuma.s1@samsung.com>
Signed-off-by: Kanchan Joshi <joshi.k@samsung.com>
Signed-off-by: Nitesh Shetty <nj.shetty@samsung.com>
Signed-off-by: Javier Gonzalez <javier.gonz@samsung.com>
---
 include/linux/uio.h | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/include/linux/uio.h b/include/linux/uio.h
index 9576fd8..c681a60 100644
--- a/include/linux/uio.h
+++ b/include/linux/uio.h
@@ -241,7 +241,7 @@  static inline size_t iov_iter_count(const struct iov_iter *i)
  * greater than the amount of data in iov_iter is fine - it'll just do
  * nothing in that case.
  */
-static inline void iov_iter_truncate(struct iov_iter *i, u64 count)
+static inline bool iov_iter_truncate(struct iov_iter *i, u64 count)
 {
 	/*
 	 * count doesn't have to fit in size_t - comparison extends both
@@ -249,8 +249,11 @@  static inline void iov_iter_truncate(struct iov_iter *i, u64 count)
 	 * conversion in assignement is by definition greater than all
 	 * values of size_t, including old i->count.
 	 */
-	if (i->count > count)
+	if (i->count > count) {
 		i->count = count;
+		return true;
+	}
+	return false;
 }
 
 /*