/* * Copyright (C) 2012 Red Hat. 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 v2 as published by the Free Software Foundation. * * 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, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 021110-1307, USA. */ struct rcu_string { struct rcu_head rcu; char str[0]; }; static inline struct rcu_string *rcu_string_strdup(const char *src, gfp_t mask) { size_t len = strlen(src) + 1; struct rcu_string *ret = kzalloc(sizeof(struct rcu_string) + (len * sizeof(char)), mask); if (!ret) return ret; strncpy(ret->str, src, len); return ret; } static inline void rcu_string_free(struct rcu_string *str) { if (str) kfree_rcu(str, rcu); } #define printk_in_rcu(fmt, ...) do { \ rcu_read_lock(); \ printk(fmt, __VA_ARGS__); \ rcu_read_unlock(); \ } while (0) #define printk_ratelimited_in_rcu(fmt, ...) do { \ rcu_read_lock(); \ printk_ratelimited(fmt, __VA_ARGS__); \ rcu_read_unlock(); \ } while (0) #define rcu_str_deref(rcu_str) ({ \ struct rcu_string *__str = rcu_dereference(rcu_str); \ __str->str; \ }) tr>
summaryrefslogtreecommitdiff
path: root/include/sound/info.h
diff options
context:
space:
mode:
authorzhong jiang <zhongjiang@huawei.com>2017-01-24 15:18:52 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-01-24 16:26:14 -0800
commit3277953de2f31dd03c6375e9a9f680ac37fc9d27 (patch)
tree6ba22924faa1b82ef2f0277db10a3f5abdc44157 /include/sound/info.h
parent3705ccfdd1e8b539225ce20e3925a945cc788d67 (diff)
mm: do not export ioremap_page_range symbol for external module
Recently, I've found cases in which ioremap_page_range was used incorrectly, in external modules, leading to crashes. This can be partly attributed to the fact that ioremap_page_range is lower-level, with fewer protections, as compared to the other functions that an external module would typically call. Those include: ioremap_cache ioremap_nocache ioremap_prot ioremap_uc ioremap_wc ioremap_wt ...each of which wraps __ioremap_caller, which in turn provides a safer way to achieve the mapping. Therefore, stop EXPORT-ing ioremap_page_range. Link: http://lkml.kernel.org/r/1485173220-29010-1-git-send-email-zhongjiang@huawei.com Signed-off-by: zhong jiang <zhongjiang@huawei.com> Reviewed-by: John Hubbard <jhubbard@nvidia.com> Suggested-by: John Hubbard <jhubbard@nvidia.com> Acked-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/sound/info.h')