diff options
Diffstat (limited to 'samples/livepatch/livepatch-shadow-mod.c')
| -rw-r--r-- | samples/livepatch/livepatch-shadow-mod.c | 44 |
1 files changed, 14 insertions, 30 deletions
diff --git a/samples/livepatch/livepatch-shadow-mod.c b/samples/livepatch/livepatch-shadow-mod.c index 4aa8a88d3cd6..5d83ad5a8118 100644 --- a/samples/livepatch/livepatch-shadow-mod.c +++ b/samples/livepatch/livepatch-shadow-mod.c @@ -1,18 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2017 Joe Lawrence <joe.lawrence@redhat.com> - * - * 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/>. */ /* @@ -96,28 +84,27 @@ MODULE_DESCRIPTION("Buggy module for shadow variable demo"); * Keep a list of all the dummies so we can clean up any residual ones * on module exit */ -LIST_HEAD(dummy_list); -DEFINE_MUTEX(dummy_list_mutex); +static LIST_HEAD(dummy_list); +static DEFINE_MUTEX(dummy_list_mutex); struct dummy { struct list_head list; unsigned long jiffies_expire; }; -noinline struct dummy *dummy_alloc(void) +static __used noinline struct dummy *dummy_alloc(void) { struct dummy *d; - void *leak; + int *leak; d = kzalloc(sizeof(*d), GFP_KERNEL); if (!d) return NULL; - d->jiffies_expire = jiffies + - msecs_to_jiffies(1000 * EXPIRE_PERIOD); + d->jiffies_expire = jiffies + secs_to_jiffies(EXPIRE_PERIOD); /* Oops, forgot to save leak! */ - leak = kzalloc(sizeof(int), GFP_KERNEL); + leak = kzalloc(sizeof(*leak), GFP_KERNEL); if (!leak) { kfree(d); return NULL; @@ -129,7 +116,7 @@ noinline struct dummy *dummy_alloc(void) return d; } -noinline void dummy_free(struct dummy *d) +static __used noinline void dummy_free(struct dummy *d) { pr_info("%s: dummy @ %p, expired = %lx\n", __func__, d, d->jiffies_expire); @@ -137,7 +124,8 @@ noinline void dummy_free(struct dummy *d) kfree(d); } -noinline bool dummy_check(struct dummy *d, unsigned long jiffies) +static __used noinline bool dummy_check(struct dummy *d, + unsigned long jiffies) { return time_after(jiffies, d->jiffies_expire); } @@ -163,8 +151,7 @@ static void alloc_work_func(struct work_struct *work) list_add(&d->list, &dummy_list); mutex_unlock(&dummy_list_mutex); - schedule_delayed_work(&alloc_dwork, - msecs_to_jiffies(1000 * ALLOC_PERIOD)); + schedule_delayed_work(&alloc_dwork, secs_to_jiffies(ALLOC_PERIOD)); } /* @@ -195,16 +182,13 @@ static void cleanup_work_func(struct work_struct *work) } mutex_unlock(&dummy_list_mutex); - schedule_delayed_work(&cleanup_dwork, - msecs_to_jiffies(1000 * CLEANUP_PERIOD)); + schedule_delayed_work(&cleanup_dwork, secs_to_jiffies(CLEANUP_PERIOD)); } static int livepatch_shadow_mod_init(void) { - schedule_delayed_work(&alloc_dwork, - msecs_to_jiffies(1000 * ALLOC_PERIOD)); - schedule_delayed_work(&cleanup_dwork, - msecs_to_jiffies(1000 * CLEANUP_PERIOD)); + schedule_delayed_work(&alloc_dwork, secs_to_jiffies(ALLOC_PERIOD)); + schedule_delayed_work(&cleanup_dwork, secs_to_jiffies(CLEANUP_PERIOD)); return 0; } |