[PATCH 4/8] nowait-aio: Introduce IOMAP_NOWAIT
From: Goldwyn Rodrigues <hidden>
Date: 2017-05-09 12:22:37
Also in:
linux-block, linux-btrfs, linux-ext4, linux-fsdevel, linux-xfs
Subsystem:
filesystems (vfs and infrastructure), filesystems [iomap], the rest · Maintainers:
Alexander Viro, Christian Brauner, Linus Torvalds
From: Goldwyn Rodrigues <redacted> IOCB_NOWAIT translates to IOMAP_NOWAIT for iomaps. This is used by XFS in the XFS patch. Signed-off-by: Goldwyn Rodrigues <redacted> Reviewed-by: Christoph Hellwig <hch@lst.de> --- fs/iomap.c | 2 ++ include/linux/iomap.h | 1 + 2 files changed, 3 insertions(+)
diff --git a/fs/iomap.c b/fs/iomap.c
index 141c3cd55a8b..d1c81753d411 100644
--- a/fs/iomap.c
+++ b/fs/iomap.c@@ -885,6 +885,8 @@ iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter, } else { dio->flags |= IOMAP_DIO_WRITE; flags |= IOMAP_WRITE; + if (iocb->ki_flags & IOCB_NOWAIT) + flags |= IOMAP_NOWAIT; } if (mapping->nrpages) {
diff --git a/include/linux/iomap.h b/include/linux/iomap.h
index 7291810067eb..53f6af89c625 100644
--- a/include/linux/iomap.h
+++ b/include/linux/iomap.h@@ -51,6 +51,7 @@ struct iomap { #define IOMAP_REPORT (1 << 2) /* report extent status, e.g. FIEMAP */ #define IOMAP_FAULT (1 << 3) /* mapping for page fault */ #define IOMAP_DIRECT (1 << 4) /* direct I/O */ +#define IOMAP_NOWAIT (1 << 5) /* Don't wait for writeback */ struct iomap_ops { /*
--
2.12.0