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From: Goldwyn Rodrigues <rgoldwyn@suse.de>
To: linux-btrfs@vger.kernel.org
Cc: hch@infradead.org, dsterba@suse.cz,
	Goldwyn Rodrigues <rgoldwyn@suse.com>,
	"Darrick J . Wong" <darrick.wong@oracle.com>
Subject: [PATCH 3/7] iomap: Remove lockdep_assert_held()
Date: Fri, 22 May 2020 07:38:33 -0500
Message-ID: <20200522123837.1196-4-rgoldwyn@suse.de> (raw)
In-Reply-To: <20200522123837.1196-1-rgoldwyn@suse.de>

From: Goldwyn Rodrigues <rgoldwyn@suse.com>

Filesystems such as btrfs can perform direct I/O without holding the
inode->i_rwsem in some of the cases like writing within i_size.
So, remove the check for lockdep_assert_held() in iomap_dio_rw()

Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
---
 fs/iomap/direct-io.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/fs/iomap/direct-io.c b/fs/iomap/direct-io.c
index f88ba6e7f6af..e4addfc58107 100644
--- a/fs/iomap/direct-io.c
+++ b/fs/iomap/direct-io.c
@@ -416,8 +416,6 @@ iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
 	struct blk_plug plug;
 	struct iomap_dio *dio;
 
-	lockdep_assert_held(&inode->i_rwsem);
-
 	if (!count)
 		return 0;
 
-- 
2.25.0


  parent reply index

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-22 12:38 [PATCH 0/7 v8] btrfs direct-io using iomap Goldwyn Rodrigues
2020-05-22 12:38 ` [PATCH 1/7] fs: Export generic_file_buffered_read() Goldwyn Rodrigues
2020-05-25 12:25   ` David Sterba
2020-05-22 12:38 ` [PATCH 2/7] iomap: add a filesystem hook for direct I/O bio submission Goldwyn Rodrigues
2020-05-22 12:38 ` Goldwyn Rodrigues [this message]
2020-05-28 15:40   ` [PATCH 3/7] iomap: Remove lockdep_assert_held() Darrick J. Wong
2020-05-22 12:38 ` [PATCH 4/7] btrfs: Switch to iomap_dio_rw() for dio Goldwyn Rodrigues
2020-05-26 15:03   ` Johannes Thumshirn
2020-05-26 16:44     ` Goldwyn Rodrigues
2020-05-28 15:13       ` Filipe Manana
2020-05-22 12:38 ` [PATCH 5/7] fs: Remove dio_end_io() Goldwyn Rodrigues
2020-05-22 12:38 ` [PATCH 6/7] btrfs: remove BTRFS_INODE_READDIO_NEED_LOCK Goldwyn Rodrigues
2020-05-22 12:38 ` [PATCH 7/7] btrfs: btrfs: split btrfs_direct_IO Goldwyn Rodrigues

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