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Fri, 09 Oct 2020 19:53:51 +0000 Received: from mga11.intel.com (unknown [192.55.52.93]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id 681c2b85-c394-4b4c-8973-c2248e976f5a; Fri, 09 Oct 2020 19:53:44 +0000 (UTC) Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:53:44 -0700 Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:53:43 -0700 X-Outflank-Mailman: Message body and most headers restored to incoming version X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 681c2b85-c394-4b4c-8973-c2248e976f5a IronPort-SDR: YziJI3PlJBzliL0ylJRMcYbG2UKox1qqh1obzhf8msK3M9/YjZBsW9yMJC4UnilOh3SrEyGsaD oNcf5vpnJ9Og== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="162068173" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="162068173" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False IronPort-SDR: Uit4axCqwtogby85Iv/hBLI1Moj4COtsBpPB5jXSVWpuENwpihzSQwSQg3nZnBMabzVvybSK2I 1kQ4taZ9oZgQ== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="298531484" From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Greg Kroah-Hartman , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , 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 50/58] drivers/android: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:50:25 -0700 Message-Id: <20201009195033.3208459-51-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 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: quoted-printable Content-Type: text/plain; charset="utf-8" From: Ira Weiny 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: Greg Kroah-Hartman Signed-off-by: Ira Weiny --- drivers/android/binder_alloc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/android/binder_alloc.c b/drivers/android/binder_alloc.c index 69609696a843..5f50856caad7 100644 --- a/drivers/android/binder_alloc.c +++ b/drivers/android/binder_alloc.c @@ -1118,9 +1118,9 @@ binder_alloc_copy_user_to_buffer(struct binder_alloc = *alloc, page =3D binder_alloc_get_page(alloc, buffer, buffer_offset, &pgoff); size =3D min_t(size_t, bytes, PAGE_SIZE - pgoff); - kptr =3D kmap(page) + pgoff; + kptr =3D kmap_thread(page) + pgoff; ret =3D copy_from_user(kptr, from, size); - kunmap(page); + kunmap_thread(page); if (ret) return bytes - size + ret; bytes -=3D size; --=20 2.28.0.rc0.12.gb6a658bd00c9