linux-kernel - [PATCH V6 2/8] fs: Remove unneeded IS

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Message-Id: <20200407182958.568475-3-ira.weiny@intel.com>
Date:   Tue,  7 Apr 2020 11:29:52 -0700
From:   ira.weiny@...el.com
To:     linux-kernel@...r.kernel.org
Cc:     Ira Weiny <ira.weiny@...el.com>,
        Dave Chinner <dchinner@...hat.com>, Jan Kara <jack@...e.cz>,
        "Darrick J. Wong" <darrick.wong@...cle.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Dave Chinner <david@...morbit.com>,
        Christoph Hellwig <hch@....de>,
        "Theodore Y. Ts'o" <tytso@....edu>, Jeff Moyer <jmoyer@...hat.com>,
        linux-ext4@...r.kernel.org, linux-xfs@...r.kernel.org,
        linux-fsdevel@...r.kernel.org
Subject: [PATCH V6 2/8] fs: Remove unneeded IS_DAX() check

From: Ira Weiny <ira.weiny@...el.com>

Remove the check because DAX now has it's own read/write methods and
file systems which support DAX check IS_DAX() prior to IOCB_DIRECT on
their own.  Therefore, it does not matter if the file state is DAX when
the iocb flags are created.

Reviewed-by: Dave Chinner <dchinner@...hat.com>
Reviewed-by: Jan Kara <jack@...e.cz>
Signed-off-by: Ira Weiny <ira.weiny@...el.com>

---
Changes from v3:
	Reword commit message.
	Reordered to be a 'pre-cleanup' patch
---
 include/linux/fs.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/fs.h b/include/linux/fs.h
index abedbffe2c9e..f97b99c36cee 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -3389,7 +3389,7 @@ extern int file_update_time(struct file *file);
 
 static inline bool io_is_direct(struct file *filp)
 {
-	return (filp->f_flags & O_DIRECT) || IS_DAX(filp->f_mapping->host);
+	return (filp->f_flags & O_DIRECT);
 }
 
 static inline bool vma_is_dax(struct vm_area_struct *vma)
-- 
2.25.1