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Date: Fri, 9 Oct 2020 12:50:25 -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>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 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, linux-fsdevel@...r.kernel.org, linux-mm@...ck.org, linux-kselftest@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org, kvm@...r.kernel.org, netdev@...r.kernel.org, bpf@...r.kernel.org, kexec@...ts.infradead.org, linux-bcache@...r.kernel.org, linux-mtd@...ts.infradead.org, devel@...verdev.osuosl.org, linux-efi@...r.kernel.org, linux-mmc@...r.kernel.org, linux-scsi@...r.kernel.org, target-devel@...r.kernel.org, linux-nfs@...r.kernel.org, ceph-devel@...r.kernel.org, linux-ext4@...r.kernel.org, linux-aio@...ck.org, io-uring@...r.kernel.org, linux-erofs@...ts.ozlabs.org, linux-um@...ts.infradead.org, linux-ntfs-dev@...ts.sourceforge.net, reiserfs-devel@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net, linux-nilfs@...r.kernel.org, cluster-devel@...hat.com, ecryptfs@...r.kernel.org, linux-cifs@...r.kernel.org, linux-btrfs@...r.kernel.org, linux-afs@...ts.infradead.org, linux-rdma@...r.kernel.org, amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org, drbd-dev@...ts.linbit.com, linux-block@...r.kernel.org, xen-devel@...ts.xenproject.org, linux-cachefs@...hat.com, samba-technical@...ts.samba.org, intel-wired-lan@...ts.osuosl.org Subject: [PATCH RFC PKS/PMEM 50/58] drivers/android: Utilize new kmap_thread() From: Ira Weiny <ira.weiny@...el.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: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Signed-off-by: Ira Weiny <ira.weiny@...el.com> --- 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 = binder_alloc_get_page(alloc, buffer, buffer_offset, &pgoff); size = min_t(size_t, bytes, PAGE_SIZE - pgoff); - kptr = kmap(page) + pgoff; + kptr = kmap_thread(page) + pgoff; ret = copy_from_user(kptr, from, size); - kunmap(page); + kunmap_thread(page); if (ret) return bytes - size + ret; bytes -= size; -- 2.28.0.rc0.12.gb6a658bd00c9
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