1 /*
2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
6 * Copyright (c) 2018 François Tigeot <ftigeot@wolfpond.org>
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice unmodified, this list of conditions, and the following
14 * disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #ifndef _LINUX_STRING_H_
32 #define _LINUX_STRING_H_
33
34 #include <linux/compiler.h>
35 #include <linux/types.h>
36 #include <linux/stddef.h>
37 #include <sys/stdarg.h>
38
39 #define __UNCONST(a) ((void *)(unsigned long)(const void *)(a))
40
41 static inline void *
memchr_inv(const void * buffer,int c,size_t len)42 memchr_inv(const void *buffer, int c, size_t len)
43 {
44 const uint8_t byte = c; /* XXX lose */
45 const char *p;
46
47 for (p = buffer; len-- > 0; p++)
48 if (*p != byte)
49 return __UNCONST(p);
50
51 return NULL;
52 }
53
54 void *kmemdup(const void *src, size_t len, gfp_t gfp);
55
56 #include <asm/string_64.h> /* for memset64() */
57
58 #endif /* _LINUX_STRING_H_ */
59