Received-SPF: pass (google.com: domain of linux-nfs-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
IronPort-SDR: BjVNbGWEsRp5ob82NyuDF9C0xKEegG65A+JRryG4Nh+TwGmSJ7KHpML9WJ4YeWqD9WoRDB2csA
 ScUnXHy+dHGw==
IronPort-SDR: JrRKqLJV6Da/4fMbj+O46I413eP5nzJr39umbL7Y1s6mKMem5hJdGDAmJBrAS4XWsKikzHiU+3
 eSwE6XBZdj5A==
From:   ira.weiny@intel.com
To:     Andrew Morton <akpm@linux-foundation.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        Andy Lutomirski <luto@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>
Cc:     Ira Weiny <ira.weiny@intel.com>,
        Luis Chamberlain <mcgrof@kernel.org>, x86@kernel.org,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Dan Williams <dan.j.williams@intel.com>,
        Fenghua Yu <fenghua.yu@intel.com>, linux-doc@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org,
        linux-fsdevel@vger.kernel.org, linux-mm@kvack.org,
        linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
        kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org,
        kexec@lists.infradead.org, linux-bcache@vger.kernel.org,
        linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org,
        linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org,
        linux-scsi@vger.kernel.org, target-devel@vger.kernel.org,
        linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org,
        linux-ext4@vger.kernel.org, linux-aio@kvack.org,
        io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org,
        linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net,
        reiserfs-devel@vger.kernel.org,
        linux-f2fs-devel@lists.sourceforge.net,
        linux-nilfs@vger.kernel.org, cluster-devel@redhat.com,
        ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org,
        linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org,
        linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org,
        dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org,
        drbd-dev@lists.linbit.com, linux-block@vger.kernel.org,
        xen-devel@lists.xenproject.org, linux-cachefs@redhat.com,
        samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org
Subject: [PATCH RFC PKS/PMEM 08/58] drivers/firmware_loader: Utilize new kmap_thread()
Date:   Fri,  9 Oct 2020 12:49:43 -0700
Message-Id: <20201009195033.3208459-9-ira.weiny@intel.com>
In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com>
References: <20201009195033.3208459-1-ira.weiny@intel.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

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

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

Cc: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
 drivers/base/firmware_loader/fallback.c | 4 ++--
 drivers/base/firmware_loader/main.c     | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/base/firmware_loader/fallback.c b/drivers/base/firmware_loader/fallback.c
index 283ca2de76d4..22dea9ba7a37 100644
--- a/drivers/base/firmware_loader/fallback.c
+++ b/drivers/base/firmware_loader/fallback.c
@@ -322,14 +322,14 @@ static void firmware_rw(struct fw_priv *fw_priv, char *buffer,
 		int page_ofs = offset & (PAGE_SIZE-1);
 		int page_cnt = min_t(size_t, PAGE_SIZE - page_ofs, count);
 
-		page_data = kmap(fw_priv->pages[page_nr]);
+		page_data = kmap_thread(fw_priv->pages[page_nr]);
 
 		if (read)
 			memcpy(buffer, page_data + page_ofs, page_cnt);
 		else
 			memcpy(page_data + page_ofs, buffer, page_cnt);
 
-		kunmap(fw_priv->pages[page_nr]);
+		kunmap_thread(fw_priv->pages[page_nr]);
 		buffer += page_cnt;
 		offset += page_cnt;
 		count -= page_cnt;
diff --git a/drivers/base/firmware_loader/main.c b/drivers/base/firmware_loader/main.c
index 63b9714a0154..cc884c9f8742 100644
--- a/drivers/base/firmware_loader/main.c
+++ b/drivers/base/firmware_loader/main.c
@@ -409,11 +409,11 @@ static int fw_decompress_xz_pages(struct device *dev, struct fw_priv *fw_priv,
 
 		/* decompress onto the new allocated page */
 		page = fw_priv->pages[fw_priv->nr_pages - 1];
-		xz_buf.out = kmap(page);
+		xz_buf.out = kmap_thread(page);
 		xz_buf.out_pos = 0;
 		xz_buf.out_size = PAGE_SIZE;
 		xz_ret = xz_dec_run(xz_dec, &xz_buf);
-		kunmap(page);
+		kunmap_thread(page);
 		fw_priv->size += xz_buf.out_pos;
 		/* partial decompression means either end or error */
 		if (xz_buf.out_pos != PAGE_SIZE)
-- 
2.28.0.rc0.12.gb6a658bd00c9