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: GdHOoe2CgN4Z8QtSwH48CYegfGQDzphHJdhrL7dkMVhJPRdKdvndKGG7T8IbZ9UjohN5JKrtfB
 oaF9Ql3ig3bQ==
IronPort-SDR: W4xxziDMxkncUnjnfmhtERgTle+fDEBI/syTBEG/tlt++YK2v+9/w8FvvM36z1FzCpPIzrEgyR
 3zBS2pDk0hzg==
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>,
        "James E.J. Bottomley" <jejb@linux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@oracle.com>, 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 42/58] drivers/scsi: Utilize new kmap_thread()
Date:   Fri,  9 Oct 2020 12:50:17 -0700
Message-Id: <20201009195033.3208459-43-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>

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

Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
 drivers/scsi/ipr.c     | 8 ++++----
 drivers/scsi/pmcraid.c | 8 ++++----
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index b0aa58d117cc..a5a0b8feb661 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -3923,9 +3923,9 @@ static int ipr_copy_ucode_buffer(struct ipr_sglist *sglist,
 			buffer += bsize_elem) {
 		struct page *page = sg_page(sg);
 
-		kaddr = kmap(page);
+		kaddr = kmap_thread(page);
 		memcpy(kaddr, buffer, bsize_elem);
-		kunmap(page);
+		kunmap_thread(page);
 
 		sg->length = bsize_elem;
 
@@ -3938,9 +3938,9 @@ static int ipr_copy_ucode_buffer(struct ipr_sglist *sglist,
 	if (len % bsize_elem) {
 		struct page *page = sg_page(sg);
 
-		kaddr = kmap(page);
+		kaddr = kmap_thread(page);
 		memcpy(kaddr, buffer, len % bsize_elem);
-		kunmap(page);
+		kunmap_thread(page);
 
 		sg->length = len % bsize_elem;
 	}
diff --git a/drivers/scsi/pmcraid.c b/drivers/scsi/pmcraid.c
index aa9ae2ae8579..4b05ba4b8a11 100644
--- a/drivers/scsi/pmcraid.c
+++ b/drivers/scsi/pmcraid.c
@@ -3269,13 +3269,13 @@ static int pmcraid_copy_sglist(
 	for (i = 0; i < (len / bsize_elem); i++, sg = sg_next(sg), buffer += bsize_elem) {
 		struct page *page = sg_page(sg);
 
-		kaddr = kmap(page);
+		kaddr = kmap_thread(page);
 		if (direction == DMA_TO_DEVICE)
 			rc = copy_from_user(kaddr, buffer, bsize_elem);
 		else
 			rc = copy_to_user(buffer, kaddr, bsize_elem);
 
-		kunmap(page);
+		kunmap_thread(page);
 
 		if (rc) {
 			pmcraid_err("failed to copy user data into sg list\n");
@@ -3288,14 +3288,14 @@ static int pmcraid_copy_sglist(
 	if (len % bsize_elem) {
 		struct page *page = sg_page(sg);
 
-		kaddr = kmap(page);
+		kaddr = kmap_thread(page);
 
 		if (direction == DMA_TO_DEVICE)
 			rc = copy_from_user(kaddr, buffer, len % bsize_elem);
 		else
 			rc = copy_to_user(buffer, kaddr, len % bsize_elem);
 
-		kunmap(page);
+		kunmap_thread(page);
 
 		sg->length = len % bsize_elem;
 	}
-- 
2.28.0.rc0.12.gb6a658bd00c9