linux-ext4 - [PATCH RFC PKS/PMEM 25/58] fs/reiserfs: Utilize new kmap

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Message-Id: <20201009195033.3208459-26-ira.weiny@intel.com>
Date:   Fri,  9 Oct 2020 12:50:00 -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>, Jan Kara <jack@...e.cz>,
        "Theodore Ts'o" <tytso@....edu>,
        Randy Dunlap <rdunlap@...radead.org>,
        Alex Shi <alex.shi@...ux.alibaba.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,
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Subject: [PATCH RFC PKS/PMEM 25/58] fs/reiserfs: Utilize new kmap_thread()

From: Ira Weiny <ira.weiny@...el.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: Jan Kara <jack@...e.cz>
Cc: "Theodore Ts'o" <tytso@....edu>
Cc: Randy Dunlap <rdunlap@...radead.org>
Cc: Alex Shi <alex.shi@...ux.alibaba.com>
Signed-off-by: Ira Weiny <ira.weiny@...el.com>
---
 fs/reiserfs/journal.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/reiserfs/journal.c b/fs/reiserfs/journal.c
index e98f99338f8f..be8f56261e8c 100644
--- a/fs/reiserfs/journal.c
+++ b/fs/reiserfs/journal.c
@@ -4194,11 +4194,11 @@ static int do_journal_end(struct reiserfs_transaction_handle *th, int flags)
 					    SB_ONDISK_JOURNAL_SIZE(sb)));
 			set_buffer_uptodate(tmp_bh);
 			page = cn->bh->b_page;
-			addr = kmap(page);
+			addr = kmap_thread(page);
 			memcpy(tmp_bh->b_data,
 			       addr + offset_in_page(cn->bh->b_data),
 			       cn->bh->b_size);
-			kunmap(page);
+			kunmap_thread(page);
 			mark_buffer_dirty(tmp_bh);
 			jindex++;
 			set_buffer_journal_dirty(cn->bh);
-- 
2.28.0.rc0.12.gb6a658bd00c9