[RESEND,3/7] mm/gup: Change GUP fast to use flags rather than a write 'bool'

Message ID	20190317183438.2057-4-ira.weiny@intel.com (mailing list archive)
State	Superseded
Headers	show Return-Path: <linux-mips-owner@kernel.org> From: ira.weiny@intel.com To: Andrew Morton <akpm@linux-foundation.org>, John Hubbard <jhubbard@nvidia.com>, Michal Hocko <mhocko@suse.com>, "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>, Peter Zijlstra <peterz@infradead.org>, Jason Gunthorpe <jgg@ziepe.ca>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, Paul Mackerras <paulus@samba.org>, "David S. Miller" <davem@davemloft.net>, Martin Schwidefsky <schwidefsky@de.ibm.com>, Heiko Carstens <heiko.carstens@de.ibm.com>, Rich Felker <dalias@libc.org>, Yoshinori Sato <ysato@users.sourceforge.jp>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>, Ralf Baechle <ralf@linux-mips.org>, James Hogan <jhogan@kernel.org> Cc: Ira Weiny <ira.weiny@intel.com>, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org Subject: [RESEND 3/7] mm/gup: Change GUP fast to use flags rather than a write 'bool' Date: Sun, 17 Mar 2019 11:34:34 -0700 Message-Id: <20190317183438.2057-4-ira.weiny@intel.com> In-Reply-To: <20190317183438.2057-1-ira.weiny@intel.com> References: <20190317183438.2057-1-ira.weiny@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-mips-owner@vger.kernel.org Precedence: bulk
Series	Add FOLL_LONGTERM to GUP fast and use it \| expand [RESEND,0/7] Add FOLL_LONGTERM to GUP fast and use it [RESEND,1/7] mm/gup: Replace get_user_pages_longterm() with FOLL_LONGTERM [RESEND,2/7] mm/gup: Change write parameter to flags in fast walk [RESEND,3/7] mm/gup: Change GUP fast to use flags rather than a write 'bool' [RESEND,4/7] mm/gup: Add FOLL_LONGTERM capability to GUP fast [RESEND,5/7] IB/hfi1: Use the new FOLL_LONGTERM flag to get_user_pages_fast() [RESEND,6/7] IB/qib: Use the new FOLL_LONGTERM flag to get_user_pages_fast() [RESEND,7/7] IB/mthca: Use the new FOLL_LONGTERM flag to get_user_pages_fast()

diff --git a/arch/mips/mm/gup.c b/arch/mips/mm/gup.c index 0d14e0d8eacf..4c2b4483683c 100644 --- a/arch/mips/mm/gup.c +++ b/arch/mips/mm/gup.c @@ -235,7 +235,7 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, * get_user_pages_fast() - pin user pages in memory * @start: starting user address * @nr_pages: number of pages from start to pin - * @write: whether pages will be written to + * @gup_flags: flags modifying pin behaviour * @pages: array that receives pointers to the pages pinned. * Should be at least nr_pages long. * @@ -247,8 +247,8 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, * requested. If nr_pages is 0 or negative, returns 0. If no pages * were pinned, returns -errno. */ -int get_user_pages_fast(unsigned long start, int nr_pages, int write, - struct page **pages) +int get_user_pages_fast(unsigned long start, int nr_pages, + unsigned int gup_flags, struct page **pages) { struct mm_struct *mm = current->mm; unsigned long addr, len, end; @@ -273,7 +273,8 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, next = pgd_addr_end(addr, end); if (pgd_none(pgd)) goto slow; - if (!gup_pud_range(pgd, addr, next, write, pages, &nr)) + if (!gup_pud_range(pgd, addr, next, gup_flags & FOLL_WRITE, + pages, &nr)) goto slow; } while (pgdp++, addr = next, addr != end); local_irq_enable(); @@ -289,7 +290,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, pages += nr; ret = get_user_pages_unlocked(start, (end - start) >> PAGE_SHIFT, - pages, write ? FOLL_WRITE : 0); + pages, gup_flags); /* Have to be a bit careful with return values */ if (nr > 0) { diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c b/arch/powerpc/kvm/book3s_64_mmu_hv.c index be7bc070eae5..ab3d484c5e2e 100644 --- a/arch/powerpc/kvm/book3s_64_mmu_hv.c +++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c @@ -600,7 +600,7 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu, /* If writing != 0, then the HPTE must allow writing, if we get here */ write_ok = writing; hva = gfn_to_hva_memslot(memslot, gfn); - npages = get_user_pages_fast(hva, 1, writing, pages); + npages = get_user_pages_fast(hva, 1, writing ? FOLL_WRITE : 0, pages); if (npages < 1) { /* Check if it's an I/O mapping */ down_read(&current->mm->mmap_sem); @@ -1193,7 +1193,7 @@ void *kvmppc_pin_guest_page(struct kvm *kvm, unsigned long gpa, if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID)) goto err; hva = gfn_to_hva_memslot(memslot, gfn); - npages = get_user_pages_fast(hva, 1, 1, pages); + npages = get_user_pages_fast(hva, 1, FOLL_WRITE, pages); if (npages < 1) goto err; page = pages[0]; diff --git a/arch/powerpc/kvm/e500_mmu.c b/arch/powerpc/kvm/e500_mmu.c index 24296f4cadc6..e0af53fd78c5 100644 --- a/arch/powerpc/kvm/e500_mmu.c +++ b/arch/powerpc/kvm/e500_mmu.c @@ -783,7 +783,7 @@ int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu, if (!pages) return -ENOMEM; - ret = get_user_pages_fast(cfg->array, num_pages, 1, pages); + ret = get_user_pages_fast(cfg->array, num_pages, FOLL_WRITE, pages); if (ret < 0) goto free_pages; diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c index 82162867f378..95ab979541be 100644 --- a/arch/s390/kvm/interrupt.c +++ b/arch/s390/kvm/interrupt.c @@ -2376,7 +2376,7 @@ static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr) ret = -EFAULT; goto out; } - ret = get_user_pages_fast(map->addr, 1, 1, &map->page); + ret = get_user_pages_fast(map->addr, 1, FOLL_WRITE, &map->page); if (ret < 0) goto out; BUG_ON(ret != 1); diff --git a/arch/s390/mm/gup.c b/arch/s390/mm/gup.c index 2809d11c7a28..0a6faf3d9960 100644 --- a/arch/s390/mm/gup.c +++ b/arch/s390/mm/gup.c @@ -265,7 +265,7 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, * get_user_pages_fast() - pin user pages in memory * @start: starting user address * @nr_pages: number of pages from start to pin - * @write: whether pages will be written to + * @gup_flags: flags modifying pin behaviour * @pages: array that receives pointers to the pages pinned. * Should be at least nr_pages long. * @@ -277,22 +277,22 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, * requested. If nr_pages is 0 or negative, returns 0. If no pages * were pinned, returns -errno. */ -int get_user_pages_fast(unsigned long start, int nr_pages, int write, - struct page **pages) +int get_user_pages_fast(unsigned long start, int nr_pages, + unsigned int gup_flags, struct page **pages) { int nr, ret; might_sleep(); start &= PAGE_MASK; - nr = __get_user_pages_fast(start, nr_pages, write, pages); + nr = __get_user_pages_fast(start, nr_pages, gup_flags & FOLL_WRITE, + pages); if (nr == nr_pages) return nr; /* Try to get the remaining pages with get_user_pages */ start += nr << PAGE_SHIFT; pages += nr; - ret = get_user_pages_unlocked(start, nr_pages - nr, pages, - write ? FOLL_WRITE : 0); + ret = get_user_pages_unlocked(start, nr_pages - nr, pages, gup_flags); /* Have to be a bit careful with return values */ if (nr > 0) ret = (ret < 0) ? nr : ret + nr; diff --git a/arch/sh/mm/gup.c b/arch/sh/mm/gup.c index 3e27f6d1f1ec..277c882f7489 100644 --- a/arch/sh/mm/gup.c +++ b/arch/sh/mm/gup.c @@ -204,7 +204,7 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, * get_user_pages_fast() - pin user pages in memory * @start: starting user address * @nr_pages: number of pages from start to pin - * @write: whether pages will be written to + * @gup_flags: flags modifying pin behaviour * @pages: array that receives pointers to the pages pinned. * Should be at least nr_pages long. * @@ -216,8 +216,8 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, * requested. If nr_pages is 0 or negative, returns 0. If no pages * were pinned, returns -errno. */ -int get_user_pages_fast(unsigned long start, int nr_pages, int write, - struct page **pages) +int get_user_pages_fast(unsigned long start, int nr_pages, + unsigned int gup_flags, struct page **pages) { struct mm_struct *mm = current->mm; unsigned long addr, len, end; @@ -241,7 +241,8 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, next = pgd_addr_end(addr, end); if (pgd_none(pgd)) goto slow; - if (!gup_pud_range(pgd, addr, next, write, pages, &nr)) + if (!gup_pud_range(pgd, addr, next, gup_flags & FOLL_WRITE, + pages, &nr)) goto slow; } while (pgdp++, addr = next, addr != end); local_irq_enable(); @@ -261,7 +262,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, ret = get_user_pages_unlocked(start, (end - start) >> PAGE_SHIFT, pages, - write ? FOLL_WRITE : 0); + gup_flags); /* Have to be a bit careful with return values */ if (nr > 0) { diff --git a/arch/sparc/mm/gup.c b/arch/sparc/mm/gup.c index aee6dba83d0e..1e770a517d4a 100644 --- a/arch/sparc/mm/gup.c +++ b/arch/sparc/mm/gup.c @@ -245,8 +245,8 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, return nr; } -int get_user_pages_fast(unsigned long start, int nr_pages, int write, - struct page **pages) +int get_user_pages_fast(unsigned long start, int nr_pages, + unsigned int gup_flags, struct page **pages) { struct mm_struct *mm = current->mm; unsigned long addr, len, end; @@ -303,7 +303,8 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, next = pgd_addr_end(addr, end); if (pgd_none(pgd)) goto slow; - if (!gup_pud_range(pgd, addr, next, write, pages, &nr)) + if (!gup_pud_range(pgd, addr, next, gup_flags & FOLL_WRITE, + pages, &nr)) goto slow; } while (pgdp++, addr = next, addr != end); @@ -324,7 +325,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, ret = get_user_pages_unlocked(start, (end - start) >> PAGE_SHIFT, pages, - write ? FOLL_WRITE : 0); + gup_flags); /* Have to be a bit careful with return values */ if (nr > 0) { diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h index 6bdca39829bc..08715034e315 100644 --- a/arch/x86/kvm/paging_tmpl.h +++ b/arch/x86/kvm/paging_tmpl.h @@ -140,7 +140,7 @@ static int FNAME(cmpxchg_gpte)(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, pt_element_t *table; struct page *page; - npages = get_user_pages_fast((unsigned long)ptep_user, 1, 1, &page); + npages = get_user_pages_fast((unsigned long)ptep_user, 1, FOLL_WRITE, &page); /* Check if the user is doing something meaningless. */ if (unlikely(npages != 1)) return -EFAULT; diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index b5b128a0a051..9d8c8d108d55 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -1804,7 +1804,7 @@ static struct page **sev_pin_memory(struct kvm *kvm, unsigned long uaddr, return NULL; /* Pin the user virtual address. */ - npinned = get_user_pages_fast(uaddr, npages, write ? FOLL_WRITE : 0, pages); + npinned = get_user_pages_fast(uaddr, npages, FOLL_WRITE, pages); if (npinned != npages) { pr_err("SEV: Failure locking %lu pages.\n", npages); goto err; diff --git a/drivers/fpga/dfl-afu-dma-region.c b/drivers/fpga/dfl-afu-dma-region.c index e18a786fc943..c438722bf4e1 100644 --- a/drivers/fpga/dfl-afu-dma-region.c +++ b/drivers/fpga/dfl-afu-dma-region.c @@ -102,7 +102,7 @@ static int afu_dma_pin_pages(struct dfl_feature_platform_data *pdata, goto unlock_vm; } - pinned = get_user_pages_fast(region->user_addr, npages, 1, + pinned = get_user_pages_fast(region->user_addr, npages, FOLL_WRITE, region->pages); if (pinned < 0) { ret = pinned; diff --git a/drivers/gpu/drm/via/via_dmablit.c b/drivers/gpu/drm/via/via_dmablit.c index 8bf3a7c23ed3..062067438f1d 100644 --- a/drivers/gpu/drm/via/via_dmablit.c +++ b/drivers/gpu/drm/via/via_dmablit.c @@ -243,7 +243,8 @@ via_lock_all_dma_pages(drm_via_sg_info_t *vsg, drm_via_dmablit_t *xfer) if (NULL == vsg->pages) return -ENOMEM; ret = get_user_pages_fast((unsigned long)xfer->mem_addr, - vsg->num_pages, vsg->direction == DMA_FROM_DEVICE, + vsg->num_pages, + vsg->direction == DMA_FROM_DEVICE ? FOLL_WRITE : 0, vsg->pages); if (ret != vsg->num_pages) { if (ret < 0) diff --git a/drivers/infiniband/hw/hfi1/user_pages.c b/drivers/infiniband/hw/hfi1/user_pages.c index 24b592c6522e..78ccacaf97d0 100644 --- a/drivers/infiniband/hw/hfi1/user_pages.c +++ b/drivers/infiniband/hw/hfi1/user_pages.c @@ -105,7 +105,8 @@ int hfi1_acquire_user_pages(struct mm_struct *mm, unsigned long vaddr, size_t np { int ret; - ret = get_user_pages_fast(vaddr, npages, writable, pages); + ret = get_user_pages_fast(vaddr, npages, writable ? FOLL_WRITE : 0, + pages); if (ret < 0) return ret; diff --git a/drivers/misc/genwqe/card_utils.c b/drivers/misc/genwqe/card_utils.c index 25265fd0fd6e..89cff9d1012b 100644 --- a/drivers/misc/genwqe/card_utils.c +++ b/drivers/misc/genwqe/card_utils.c @@ -603,7 +603,7 @@ int genwqe_user_vmap(struct genwqe_dev *cd, struct dma_mapping *m, void *uaddr, /* pin user pages in memory */ rc = get_user_pages_fast(data & PAGE_MASK, /* page aligned addr */ m->nr_pages, - m->write, /* readable/writable */ + m->write ? FOLL_WRITE : 0, /* readable/writable */ m->page_list); /* ptrs to pages */ if (rc < 0) goto fail_get_user_pages; diff --git a/drivers/misc/vmw_vmci/vmci_host.c b/drivers/misc/vmw_vmci/vmci_host.c index 997f92543dd4..422d08da3244 100644 --- a/drivers/misc/vmw_vmci/vmci_host.c +++ b/drivers/misc/vmw_vmci/vmci_host.c @@ -242,7 +242,7 @@ static int vmci_host_setup_notify(struct vmci_ctx *context, /* * Lock physical page backing a given user VA. */ - retval = get_user_pages_fast(uva, 1, 1, &context->notify_page); + retval = get_user_pages_fast(uva, 1, FOLL_WRITE, &context->notify_page); if (retval != 1) { context->notify_page = NULL; return VMCI_ERROR_GENERIC; diff --git a/drivers/misc/vmw_vmci/vmci_queue_pair.c b/drivers/misc/vmw_vmci/vmci_queue_pair.c index f5f1aac9d163..1174735f003d 100644 --- a/drivers/misc/vmw_vmci/vmci_queue_pair.c +++ b/drivers/misc/vmw_vmci/vmci_queue_pair.c @@ -659,7 +659,8 @@ static int qp_host_get_user_memory(u64 produce_uva, int err = VMCI_SUCCESS; retval = get_user_pages_fast((uintptr_t) produce_uva, - produce_q->kernel_if->num_pages, 1, + produce_q->kernel_if->num_pages, + FOLL_WRITE, produce_q->kernel_if->u.h.header_page); if (retval < (int)produce_q->kernel_if->num_pages) { pr_debug("get_user_pages_fast(produce) failed (retval=%d)", @@ -671,7 +672,8 @@ static int qp_host_get_user_memory(u64 produce_uva, } retval = get_user_pages_fast((uintptr_t) consume_uva, - consume_q->kernel_if->num_pages, 1, + consume_q->kernel_if->num_pages, + FOLL_WRITE, consume_q->kernel_if->u.h.header_page); if (retval < (int)consume_q->kernel_if->num_pages) { pr_debug("get_user_pages_fast(consume) failed (retval=%d)", diff --git a/drivers/platform/goldfish/goldfish_pipe.c b/drivers/platform/goldfish/goldfish_pipe.c index 321bc673c417..cef0133aa47a 100644 --- a/drivers/platform/goldfish/goldfish_pipe.c +++ b/drivers/platform/goldfish/goldfish_pipe.c @@ -274,7 +274,8 @@ static int pin_user_pages(unsigned long first_page, *iter_last_page_size = last_page_size; } - ret = get_user_pages_fast(first_page, requested_pages, !is_write, + ret = get_user_pages_fast(first_page, requested_pages, + !is_write ? FOLL_WRITE : 0, pages); if (ret <= 0) return -EFAULT; diff --git a/drivers/rapidio/devices/rio_mport_cdev.c b/drivers/rapidio/devices/rio_mport_cdev.c index 1e1f42e210a0..4a4a75fa26d5 100644 --- a/drivers/rapidio/devices/rio_mport_cdev.c +++ b/drivers/rapidio/devices/rio_mport_cdev.c @@ -868,7 +868,9 @@ rio_dma_transfer(struct file *filp, u32 transfer_mode, pinned = get_user_pages_fast( (unsigned long)xfer->loc_addr & PAGE_MASK, - nr_pages, dir == DMA_FROM_DEVICE, page_list); + nr_pages, + dir == DMA_FROM_DEVICE ? FOLL_WRITE : 0, + page_list); if (pinned != nr_pages) { if (pinned < 0) { diff --git a/drivers/sbus/char/oradax.c b/drivers/sbus/char/oradax.c index 6516bc3cb58b..790aa148670d 100644 --- a/drivers/sbus/char/oradax.c +++ b/drivers/sbus/char/oradax.c @@ -437,7 +437,7 @@ static int dax_lock_page(void *va, struct page **p) dax_dbg("uva %p", va); - ret = get_user_pages_fast((unsigned long)va, 1, 1, p); + ret = get_user_pages_fast((unsigned long)va, 1, FOLL_WRITE, p); if (ret == 1) { dax_dbg("locked page %p, for VA %p", *p, va); return 0; diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c index 19c022e66d63..3c6a18ad9a87 100644 --- a/drivers/scsi/st.c +++ b/drivers/scsi/st.c @@ -4922,7 +4922,8 @@ static int sgl_map_user_pages(struct st_buffer *STbp, /* Try to fault in all of the necessary pages */ /* rw==READ means read from drive, write into memory area */ - res = get_user_pages_fast(uaddr, nr_pages, rw == READ, pages); + res = get_user_pages_fast(uaddr, nr_pages, rw == READ ? FOLL_WRITE : 0, + pages); /* Errors and no page mapped should return here */ if (res < nr_pages) diff --git a/drivers/staging/gasket/gasket_page_table.c b/drivers/staging/gasket/gasket_page_table.c index 26755d9ca41d..f67fdf1d3817 100644 --- a/drivers/staging/gasket/gasket_page_table.c +++ b/drivers/staging/gasket/gasket_page_table.c @@ -486,8 +486,8 @@ static int gasket_perform_mapping(struct gasket_page_table *pg_tbl, ptes[i].dma_addr = pg_tbl->coherent_pages[0].paddr + off + i * PAGE_SIZE; } else { - ret = get_user_pages_fast(page_addr - offset, 1, 1, - &page); + ret = get_user_pages_fast(page_addr - offset, 1, + FOLL_WRITE, &page); if (ret <= 0) { dev_err(pg_tbl->device, diff --git a/drivers/tee/tee_shm.c b/drivers/tee/tee_shm.c index 0b9ab1d0dd45..49fd7312e2aa 100644 --- a/drivers/tee/tee_shm.c +++ b/drivers/tee/tee_shm.c @@ -273,7 +273,7 @@ struct tee_shm *tee_shm_register(struct tee_context *ctx, unsigned long addr, goto err; } - rc = get_user_pages_fast(start, num_pages, 1, shm->pages); + rc = get_user_pages_fast(start, num_pages, FOLL_WRITE, shm->pages); if (rc > 0) shm->num_pages = rc; if (rc != num_pages) { diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c b/drivers/vfio/vfio_iommu_spapr_tce.c index 8dbb270998f4..089c59c50d97 100644 --- a/drivers/vfio/vfio_iommu_spapr_tce.c +++ b/drivers/vfio/vfio_iommu_spapr_tce.c @@ -532,7 +532,8 @@ static int tce_iommu_use_page(unsigned long tce, unsigned long *hpa) enum dma_data_direction direction = iommu_tce_direction(tce); if (get_user_pages_fast(tce & PAGE_MASK, 1, - direction != DMA_TO_DEVICE, &page) != 1) + direction != DMA_TO_DEVICE ? FOLL_WRITE : 0, + &page) != 1) return -EFAULT; *hpa = __pa((unsigned long) page_address(page)); diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index a2e5dc7716e2..2da5969bccb9 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -1700,7 +1700,7 @@ static int set_bit_to_user(int nr, void __user *addr) int bit = nr + (log % PAGE_SIZE) * 8; int r; - r = get_user_pages_fast(log, 1, 1, &page); + r = get_user_pages_fast(log, 1, FOLL_WRITE, &page); if (r < 0) return r; BUG_ON(r != 1); diff --git a/drivers/video/fbdev/pvr2fb.c b/drivers/video/fbdev/pvr2fb.c index 8a53d1de611d..41390c8e0f67 100644 --- a/drivers/video/fbdev/pvr2fb.c +++ b/drivers/video/fbdev/pvr2fb.c @@ -686,7 +686,7 @@ static ssize_t pvr2fb_write(struct fb_info *info, const char *buf, if (!pages) return -ENOMEM; - ret = get_user_pages_fast((unsigned long)buf, nr_pages, true, pages); + ret = get_user_pages_fast((unsigned long)buf, nr_pages, FOLL_WRITE, pages); if (ret < nr_pages) { nr_pages = ret; ret = -EINVAL; diff --git a/drivers/virt/fsl_hypervisor.c b/drivers/virt/fsl_hypervisor.c index 8ba726e600e9..6446bcab4185 100644 --- a/drivers/virt/fsl_hypervisor.c +++ b/drivers/virt/fsl_hypervisor.c @@ -244,7 +244,7 @@ static long ioctl_memcpy(struct fsl_hv_ioctl_memcpy __user *p) /* Get the physical addresses of the source buffer */ num_pinned = get_user_pages_fast(param.local_vaddr - lb_offset, - num_pages, param.source != -1, pages); + num_pages, param.source != -1 ? FOLL_WRITE : 0, pages); if (num_pinned != num_pages) { /* get_user_pages() failed */ diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c index 7cf9c51318aa..02bc815982d4 100644 --- a/drivers/xen/gntdev.c +++ b/drivers/xen/gntdev.c @@ -852,7 +852,7 @@ static int gntdev_get_page(struct gntdev_copy_batch *batch, void __user *virt, unsigned long xen_pfn; int ret; - ret = get_user_pages_fast(addr, 1, writeable, &page); + ret = get_user_pages_fast(addr, 1, writeable ? FOLL_WRITE : 0, &page); if (ret < 0) return ret; diff --git a/fs/orangefs/orangefs-bufmap.c b/fs/orangefs/orangefs-bufmap.c index 443bcd8c3c19..5a7c4fda682f 100644 --- a/fs/orangefs/orangefs-bufmap.c +++ b/fs/orangefs/orangefs-bufmap.c @@ -269,7 +269,7 @@ orangefs_bufmap_map(struct orangefs_bufmap *bufmap, /* map the pages */ ret = get_user_pages_fast((unsigned long)user_desc->ptr, - bufmap->page_count, 1, bufmap->page_array); + bufmap->page_count, FOLL_WRITE, bufmap->page_array); if (ret < 0) return ret; diff --git a/include/linux/mm.h b/include/linux/mm.h index 6831077d126c..6607defbd8cc 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1531,8 +1531,8 @@ long get_user_pages_locked(unsigned long start, unsigned long nr_pages, long get_user_pages_unlocked(unsigned long start, unsigned long nr_pages, struct page **pages, unsigned int gup_flags); -int get_user_pages_fast(unsigned long start, int nr_pages, int write, - struct page **pages); +int get_user_pages_fast(unsigned long start, int nr_pages, + unsigned int gup_flags, struct page **pages); /* Container for pinned pfns / pages */ struct frame_vector { diff --git a/kernel/futex.c b/kernel/futex.c index c3b73b0311bc..1b9eca04fb0a 100644 --- a/kernel/futex.c +++ b/kernel/futex.c @@ -543,7 +543,7 @@ get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key, enum futex_a if (unlikely(should_fail_futex(fshared))) return -EFAULT; - err = get_user_pages_fast(address, 1, 1, &page); + err = get_user_pages_fast(address, 1, FOLL_WRITE, &page); /* * If write access is not required (eg. FUTEX_WAIT), try * and get read-only access. diff --git a/lib/iov_iter.c b/lib/iov_iter.c index ea36dc355da1..50e77ec427d0 100644 --- a/lib/iov_iter.c +++ b/lib/iov_iter.c @@ -1293,7 +1293,9 @@ ssize_t iov_iter_get_pages(struct iov_iter *i, len = maxpages * PAGE_SIZE; addr &= ~(PAGE_SIZE - 1); n = DIV_ROUND_UP(len, PAGE_SIZE); - res = get_user_pages_fast(addr, n, iov_iter_rw(i) != WRITE, pages); + res = get_user_pages_fast(addr, n, + iov_iter_rw(i) != WRITE ? FOLL_WRITE : 0, + pages); if (unlikely(res < 0)) return res; return (res == n ? len : res * PAGE_SIZE) - *start; @@ -1374,7 +1376,8 @@ ssize_t iov_iter_get_pages_alloc(struct iov_iter *i, p = get_pages_array(n); if (!p) return -ENOMEM; - res = get_user_pages_fast(addr, n, iov_iter_rw(i) != WRITE, p); + res = get_user_pages_fast(addr, n, + iov_iter_rw(i) != WRITE ? FOLL_WRITE : 0, p); if (unlikely(res < 0)) { kvfree(p); return res; diff --git a/mm/gup.c b/mm/gup.c index 2b21eeaf8cc8..0684a9536207 100644 --- a/mm/gup.c +++ b/mm/gup.c @@ -2025,7 +2025,7 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, * get_user_pages_fast() - pin user pages in memory * @start: starting user address * @nr_pages: number of pages from start to pin - * @write: whether pages will be written to + * @gup_flags: flags modifying pin behaviour * @pages: array that receives pointers to the pages pinned. * Should be at least nr_pages long. * @@ -2037,8 +2037,8 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, * requested. If nr_pages is 0 or negative, returns 0. If no pages * were pinned, returns -errno. */ -int get_user_pages_fast(unsigned long start, int nr_pages, int write, - struct page **pages) +int get_user_pages_fast(unsigned long start, int nr_pages, + unsigned int gup_flags, struct page **pages) { unsigned long addr, len, end; int nr = 0, ret = 0; @@ -2056,7 +2056,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, if (gup_fast_permitted(start, nr_pages)) { local_irq_disable(); - gup_pgd_range(addr, end, write ? FOLL_WRITE : 0, pages, &nr); + gup_pgd_range(addr, end, gup_flags, pages, &nr); local_irq_enable(); ret = nr; } @@ -2067,7 +2067,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, pages += nr; ret = get_user_pages_unlocked(start, nr_pages - nr, pages, - write ? FOLL_WRITE : 0); + gup_flags); /* Have to be a bit careful with return values */ if (nr > 0) { diff --git a/mm/util.c b/mm/util.c index d559bde497a9..f94a1ac09cd8 100644 --- a/mm/util.c +++ b/mm/util.c @@ -318,7 +318,7 @@ EXPORT_SYMBOL_GPL(__get_user_pages_fast); * get_user_pages_fast() - pin user pages in memory * @start: starting user address * @nr_pages: number of pages from start to pin - * @write: whether pages will be written to + * @gup_flags: flags modifying pin behaviour * @pages: array that receives pointers to the pages pinned. * Should be at least nr_pages long. * @@ -339,10 +339,10 @@ EXPORT_SYMBOL_GPL(__get_user_pages_fast); * were pinned, returns -errno. */ int __weak get_user_pages_fast(unsigned long start, - int nr_pages, int write, struct page **pages) + int nr_pages, unsigned int gup_flags, + struct page **pages) { - return get_user_pages_unlocked(start, nr_pages, pages, - write ? FOLL_WRITE : 0); + return get_user_pages_unlocked(start, nr_pages, pages, gup_flags); } EXPORT_SYMBOL_GPL(get_user_pages_fast); diff --git a/net/ceph/pagevec.c b/net/ceph/pagevec.c index d3736f5bffec..74cafc0142ea 100644 --- a/net/ceph/pagevec.c +++ b/net/ceph/pagevec.c @@ -27,7 +27,7 @@ struct page **ceph_get_direct_page_vector(const void __user *data, while (got < num_pages) { rc = get_user_pages_fast( (unsigned long)data + ((unsigned long)got * PAGE_SIZE), - num_pages - got, write_page, pages + got); + num_pages - got, write_page ? FOLL_WRITE : 0, pages + got); if (rc < 0) break; BUG_ON(rc == 0); diff --git a/net/rds/info.c b/net/rds/info.c index e367a97a18c8..03f6fd56d237 100644 --- a/net/rds/info.c +++ b/net/rds/info.c @@ -193,7 +193,7 @@ int rds_info_getsockopt(struct socket *sock, int optname, char __user *optval, ret = -ENOMEM; goto out; } - ret = get_user_pages_fast(start, nr_pages, 1, pages); + ret = get_user_pages_fast(start, nr_pages, FOLL_WRITE, pages); if (ret != nr_pages) { if (ret > 0) nr_pages = ret; diff --git a/net/rds/rdma.c b/net/rds/rdma.c index 182ab8430594..b340ed4fc43a 100644 --- a/net/rds/rdma.c +++ b/net/rds/rdma.c @@ -158,7 +158,8 @@ static int rds_pin_pages(unsigned long user_addr, unsigned int nr_pages, { int ret; - ret = get_user_pages_fast(user_addr, nr_pages, write, pages); + ret = get_user_pages_fast(user_addr, nr_pages, write ? FOLL_WRITE : 0, + pages); if (ret >= 0 && ret < nr_pages) { while (ret--)

[RESEND,3/7] mm/gup: Change GUP fast to use flags rather than a write 'bool'

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