diff options
Diffstat (limited to 'drivers/sbus/char/oradax.c')
| -rw-r--r-- | drivers/sbus/char/oradax.c | 47 |
1 files changed, 16 insertions, 31 deletions
diff --git a/drivers/sbus/char/oradax.c b/drivers/sbus/char/oradax.c index 6516bc3cb58b..a536dd6f4f7c 100644 --- a/drivers/sbus/char/oradax.c +++ b/drivers/sbus/char/oradax.c @@ -1,18 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. */ /* @@ -30,7 +18,7 @@ * the recommended way for applications to use the coprocessor, and * the driver interface is not intended for general use. * - * See Documentation/sparc/oradax/oracle-dax.txt for more details. + * See Documentation/arch/sparc/oradax/oracle-dax.rst for more details. */ #include <linux/uaccess.h> @@ -238,8 +226,10 @@ static int dax_ccb_info(u64 ca, struct ccb_info_result *info); static int dax_ccb_kill(u64 ca, u16 *kill_res); static struct cdev c_dev; -static struct class *cl; static dev_t first; +static const struct class cl = { + .name = DAX_NAME, +}; static int max_ccb_version; static int dax_debug; @@ -335,14 +325,11 @@ static int __init dax_attach(void) goto done; } - cl = class_create(THIS_MODULE, DAX_NAME); - if (IS_ERR(cl)) { - dax_err("class_create failed"); - ret = PTR_ERR(cl); + ret = class_register(&cl); + if (ret) goto class_error; - } - if (device_create(cl, NULL, first, NULL, dax_name) == NULL) { + if (device_create(&cl, NULL, first, NULL, dax_name) == NULL) { dax_err("device_create failed"); ret = -ENXIO; goto device_error; @@ -359,9 +346,9 @@ static int __init dax_attach(void) goto done; cdev_error: - device_destroy(cl, first); + device_destroy(&cl, first); device_error: - class_destroy(cl); + class_unregister(&cl); class_error: unregister_chrdev_region(first, 1); done: @@ -374,8 +361,8 @@ static void __exit dax_detach(void) { pr_info("Cleaning up DAX module\n"); cdev_del(&c_dev); - device_destroy(cl, first); - class_destroy(cl); + device_destroy(&cl, first); + class_unregister(&cl); unregister_chrdev_region(first, 1); } module_exit(dax_detach); @@ -401,7 +388,7 @@ static int dax_devmap(struct file *f, struct vm_area_struct *vma) /* completion area is mapped read-only for user */ if (vma->vm_flags & VM_WRITE) return -EPERM; - vma->vm_flags &= ~VM_MAYWRITE; + vm_flags_clear(vma, VM_MAYWRITE); if (remap_pfn_range(vma, vma->vm_start, ctx->ca_buf_ra >> PAGE_SHIFT, len, vma->vm_page_prot)) @@ -422,9 +409,7 @@ static void dax_unlock_pages(struct dax_ctx *ctx, int ccb_index, int nelem) if (p) { dax_dbg("freeing page %p", p); - if (j == OUT) - set_page_dirty(p); - put_page(p); + unpin_user_pages_dirty_lock(&p, 1, j == OUT); ctx->pages[i][j] = NULL; } } @@ -437,13 +422,13 @@ 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 = pin_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; } - dax_dbg("get_user_pages failed, va=%p, ret=%d", va, ret); + dax_dbg("pin_user_pages failed, va=%p, ret=%d", va, ret); return -1; } |