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From:   ira.weiny@intel.com
To:     Andrew Morton <akpm@linux-foundation.org>,
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Cc:     Ira Weiny <ira.weiny@intel.com>,
        Anton Altaparmakov <anton@tuxera.com>, x86@kernel.org,
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Subject: [PATCH RFC PKS/PMEM 29/58] fs/ntfs: Utilize new kmap_thread()
Date:   Fri,  9 Oct 2020 12:50:04 -0700
Message-Id: <20201009195033.3208459-30-ira.weiny@intel.com>
In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com>
References: <20201009195033.3208459-1-ira.weiny@intel.com>
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From: Ira Weiny <ira.weiny@intel.com>

The kmap() calls in this FS are localized to a single thread.  To avoid
the over head of global PKRS updates use the new kmap_thread() call.

Cc: Anton Altaparmakov <anton@tuxera.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
 fs/ntfs/aops.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/ntfs/aops.c b/fs/ntfs/aops.c
index bb0a43860ad2..11633d732809 100644
--- a/fs/ntfs/aops.c
+++ b/fs/ntfs/aops.c
@@ -1099,7 +1099,7 @@ static int ntfs_write_mst_block(struct page *page,
 	if (!nr_bhs)
 		goto done;
 	/* Map the page so we can access its contents. */
-	kaddr = kmap(page);
+	kaddr = kmap_thread(page);
 	/* Clear the page uptodate flag whilst the mst fixups are applied. */
 	BUG_ON(!PageUptodate(page));
 	ClearPageUptodate(page);
@@ -1276,7 +1276,7 @@ static int ntfs_write_mst_block(struct page *page,
 		iput(VFS_I(base_tni));
 	}
 	SetPageUptodate(page);
-	kunmap(page);
+	kunmap_thread(page);
 done:
 	if (unlikely(err && err != -ENOMEM)) {
 		/*
-- 
2.28.0.rc0.12.gb6a658bd00c9