From: Dan Williams <dan.j.williams@intel.com>
To: linux-nvdimm@lists.01.org
Cc: Jan Kara <jack@suse.cz>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Alexander Viro <viro@zeniv.linux.org.uk>,
linux-fsdevel@vger.kernel.org, Christoph Hellwig <hch@lst.de>
Subject: [PATCH v2 4/5] dax: short circuit vma_is_fsdax() in the CONFIG_FS_DAX=n case
Date: Thu, 22 Feb 2018 23:18:01 -0800 [thread overview]
Message-ID: <151937028128.18973.18029610933124841542.stgit@dwillia2-desk3.amr.corp.intel.com> (raw)
In-Reply-To: <151937026001.18973.12034171121582300402.stgit@dwillia2-desk3.amr.corp.intel.com>
Do not bother looking up the file type in the case when Filesystem-DAX
is disabled at build time.
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org
Cc: Christoph Hellwig <hch@lst.de>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
include/linux/fs.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/linux/fs.h b/include/linux/fs.h
index b2fa9b4c1e51..8f80d9fff86d 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -3195,6 +3195,8 @@ static inline bool vma_is_fsdax(struct vm_area_struct *vma)
if (!vma->vm_file)
return false;
+ if (!IS_ENABLED(CONFIG_FS_DAX))
+ return false;
if (!vma_is_dax(vma))
return false;
inode = file_inode(vma->vm_file);
--
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next prev parent reply other threads:[~2018-02-23 7:27 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-23 7:17 [PATCH v2 0/5] vfio, dax: prevent long term filesystem-dax pins and other fixes Dan Williams
2018-02-23 7:17 ` [PATCH v2 1/5] dax: fix vma_is_fsdax() helper Dan Williams
2018-02-23 7:17 ` [PATCH v2 2/5] dax: fix dax_mapping() definition in the FS_DAX=n + DEV_DAX=y case Dan Williams
2018-02-26 9:44 ` Jan Kara
2018-02-23 7:17 ` [PATCH v2 3/5] dax: fix S_DAX definition Dan Williams
2018-02-26 9:43 ` Jan Kara
2018-02-23 7:18 ` Dan Williams [this message]
2018-02-23 7:18 ` [PATCH v2 5/5] vfio: disable filesystem-dax page pinning Dan Williams
2018-02-23 8:55 ` [PATCH v2 0/5] vfio, dax: prevent long term filesystem-dax pins and other fixes Haozhong Zhang
2018-02-23 16:56 ` Dan Williams
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