netdev - [PATCH RFC PKS/PMEM 39/58] fs/jffs2: Utilize new kmap

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Date:   Fri,  9 Oct 2020 12:50:14 -0700
From:   ira.weiny@...el.com
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>
Cc:     Ira Weiny <ira.weiny@...el.com>, x86@...nel.org,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Fenghua Yu <fenghua.yu@...el.com>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-nvdimm@...ts.01.org,
        linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
        linux-kselftest@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
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Subject: [PATCH RFC PKS/PMEM 39/58] fs/jffs2: Utilize new kmap_thread()

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

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

Signed-off-by: Ira Weiny <ira.weiny@...el.com>
---
 fs/jffs2/file.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/jffs2/file.c b/fs/jffs2/file.c
index 3e6d54f9b011..14dd2b18cc16 100644
--- a/fs/jffs2/file.c
+++ b/fs/jffs2/file.c
@@ -287,13 +287,13 @@ static int jffs2_write_end(struct file *filp, struct address_space *mapping,
 
 	/* In 2.4, it was already kmapped by generic_file_write(). Doesn't
 	   hurt to do it again. The alternative is ifdefs, which are ugly. */
-	kmap(pg);
+	kmap_thread(pg);
 
 	ret = jffs2_write_inode_range(c, f, ri, page_address(pg) + aligned_start,
 				      (pg->index << PAGE_SHIFT) + aligned_start,
 				      end - aligned_start, &writtenlen);
 
-	kunmap(pg);
+	kunmap_thread(pg);
 
 	if (ret) {
 		/* There was an error writing. */
-- 
2.28.0.rc0.12.gb6a658bd00c9