From mboxrd@z Thu Jan 1 00:00:00 1970 From: ira.weiny@intel.com Date: Fri, 09 Oct 2020 19:50:16 +0000 Subject: [PATCH RFC PKS/PMEM 41/58] drivers/target: Utilize new kmap_thread() Message-Id: <20201009195033.3208459-42-ira.weiny@intel.com> List-Id: References: <20201009195033.3208459-1-ira.weiny@intel.com> In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: linux-aio@kvack.org, linux-efi@vger.kernel.org, kvm@vger.kernel.org, linux-doc@vger.kernel.org, linux-mmc@vger.kernel.org, Dave Hansen , dri-devel@lists.freedesktop.org, linux-mm@kvack.org, target-devel@vger.kernel.org, linux-mtd@lists.infradead.org, linux-kselftest@vger.kernel.org, samba-technical@lists.samba.org, Ira Weiny , ceph-devel@vger.kernel.org, drbd-dev@lists.linbit.com, devel@driverdev.osuosl.org, linux-cifs@vger.kernel.org, linux-nilfs@vger.kernel.org, linux-scsi@vger.kernel.org, linux-nvdimm@lists.01.org, linux-rdma@vger.kernel.org, x86@kernel.org, amd-gfx@lists.freedesktop.org, linux-afs@lists.infradead.org, cluster-devel@redhat.com, linux-cachefs@redhat.com, intel-wired-lan@lists.osuosl.org, xen-devel@lists.xenproject.org, linux-ext4@vger.kernel.org, Fenghua Yu , linux-um@lists.infradead.org, intel-gfx@lists.freedesktop.org, ecryptfs@vger.kernel.org, linux-erofs@lists.ozlabs.org, reiserfs-devel@vger.kernel.org, linux-block@vger.kernel.org, linux-bcache@vger.kernel.org, Dan Williams , io-uring@vger.kernel.org, linux-nfs@vger.kernel.org, linux-ntfs-dev@lists.sourceforge.net, netdev@vger.kernel.org, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, bpf@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-btrfs@vger.kernel.org From: Ira Weiny These 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. Signed-off-by: Ira Weiny --- drivers/target/target_core_iblock.c | 4 ++-- drivers/target/target_core_rd.c | 4 ++-- drivers/target/target_core_transport.c | 4 ++-- 3 files changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c index 1c181d31f4c8..df7b1568edb3 100644 --- a/drivers/target/target_core_iblock.c +++ b/drivers/target/target_core_iblock.c @@ -415,7 +415,7 @@ iblock_execute_zero_out(struct block_device *bdev, struct se_cmd *cmd) unsigned char *buf, *not_zero; int ret; - buf = kmap(sg_page(sg)) + sg->offset; + buf = kmap_thread(sg_page(sg)) + sg->offset; if (!buf) return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; /* @@ -423,7 +423,7 @@ iblock_execute_zero_out(struct block_device *bdev, struct se_cmd *cmd) * incoming WRITE_SAME payload does not contain zeros. */ not_zero = memchr_inv(buf, 0x00, cmd->data_length); - kunmap(sg_page(sg)); + kunmap_thread(sg_page(sg)); if (not_zero) return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; diff --git a/drivers/target/target_core_rd.c b/drivers/target/target_core_rd.c index 408bd975170b..dbbdd39c5bf9 100644 --- a/drivers/target/target_core_rd.c +++ b/drivers/target/target_core_rd.c @@ -159,9 +159,9 @@ static int rd_allocate_sgl_table(struct rd_dev *rd_dev, struct rd_dev_sg_table * sg_assign_page(&sg[j], pg); sg[j].length = PAGE_SIZE; - p = kmap(pg); + p = kmap_thread(pg); memset(p, init_payload, PAGE_SIZE); - kunmap(pg); + kunmap_thread(pg); } page_offset += sg_per_table; diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index ff26ab0a5f60..8d0bae5a92e5 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -1692,11 +1692,11 @@ int target_submit_cmd_map_sgls(struct se_cmd *se_cmd, struct se_session *se_sess unsigned char *buf = NULL; if (sgl) - buf = kmap(sg_page(sgl)) + sgl->offset; + buf = kmap_thread(sg_page(sgl)) + sgl->offset; if (buf) { memset(buf, 0, sgl->length); - kunmap(sg_page(sgl)); + kunmap_thread(sg_page(sgl)); } } -- 2.28.0.rc0.12.gb6a658bd00c9