mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-11-23 10:06:28 +08:00
22b46bdc5f
Do a cleanup in the short headers: - add forward declarations for types referenced by pointers - add includes when types need them This fixes potential compilation problems if the headers are reordered or the missing includes are not provided indirectly. Signed-off-by: David Sterba <dsterba@suse.com>
59 lines
1.2 KiB
C
59 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (C) 2012 Red Hat. All rights reserved.
|
|
*/
|
|
|
|
#ifndef BTRFS_RCU_STRING_H
|
|
#define BTRFS_RCU_STRING_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/string.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/rcupdate.h>
|
|
#include <linux/printk.h>
|
|
|
|
struct rcu_string {
|
|
struct rcu_head rcu;
|
|
char str[];
|
|
};
|
|
|
|
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;
|
|
/* Warn if the source got unexpectedly truncated. */
|
|
if (WARN_ON(strscpy(ret->str, src, len) < 0)) {
|
|
kfree(ret);
|
|
return NULL;
|
|
}
|
|
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; \
|
|
})
|
|
|
|
#endif
|