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#ifndef __BACKPORT_KERNEL_H
#define __BACKPORT_KERNEL_H
#include_next <linux/kernel.h>
#include <linux/version.h>
/*
* some older kernels don't have this and thus don't
* include it from kernel.h like new kernels
*/
#include <linux/printk.h>
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25))
/**
* The following things are out of ./include/linux/kernel.h
* The new iwlwifi driver is using them.
*/
#define strict_strtoul LINUX_BACKPORT(strict_strtoul)
extern int strict_strtoul(const char *, unsigned int, unsigned long *);
#define strict_strtol LINUX_BACKPORT(strict_strtol)
extern int strict_strtol(const char *, unsigned int, long *);
#endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25)) */
/*
* This backports:
*
* From a3860c1c5dd1137db23d7786d284939c5761d517 Mon Sep 17 00:00:00 2001
* From: Xi Wang <xi.wang@gmail.com>
* Date: Thu, 31 May 2012 16:26:04 -0700
* Subject: [PATCH] introduce SIZE_MAX
*/
#ifndef SIZE_MAX
#define SIZE_MAX (~(size_t)0)
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,26)
extern const char hex_asc[];
#endif
#ifndef hex_asc_hi
#define hex_asc_hi(x) hex_asc[((x) & 0xf0) >> 4]
#endif
#ifndef hex_asc_lo
#define hex_asc_lo(x) hex_asc[((x) & 0x0f)]
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(3,2,0)
static inline char *hex_byte_pack(char *buf, u8 byte)
{
*buf++ = hex_asc_hi(byte);
*buf++ = hex_asc_lo(byte);
return buf;
}
#endif
/* This backports:
*
* commit 36a26c69b4c70396ef569c3452690fba0c1dec08
* Author: Nicholas Bellinger <nab@linux-iscsi.org>
* Date: Tue Jul 26 00:35:26 2011 -0700
*
* kernel.h: Add DIV_ROUND_UP_ULL and DIV_ROUND_UP_SECTOR_T macro usage
*/
#ifndef DIV_ROUND_UP_ULL
#define DIV_ROUND_UP_ULL(ll,d) \
({ unsigned long long _tmp = (ll)+(d)-1; do_div(_tmp, d); _tmp; })
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(3,0,0)
int __must_check kstrtoull_from_user(const char __user *s, size_t count, unsigned int base, unsigned long long *res);
int __must_check kstrtoll_from_user(const char __user *s, size_t count, unsigned int base, long long *res);
int __must_check kstrtoul_from_user(const char __user *s, size_t count, unsigned int base, unsigned long *res);
int __must_check kstrtol_from_user(const char __user *s, size_t count, unsigned int base, long *res);
int __must_check kstrtouint_from_user(const char __user *s, size_t count, unsigned int base, unsigned int *res);
int __must_check kstrtoint_from_user(const char __user *s, size_t count, unsigned int base, int *res);
int __must_check kstrtou16_from_user(const char __user *s, size_t count, unsigned int base, u16 *res);
int __must_check kstrtos16_from_user(const char __user *s, size_t count, unsigned int base, s16 *res);
int __must_check kstrtou8_from_user(const char __user *s, size_t count, unsigned int base, u8 *res);
int __must_check kstrtos8_from_user(const char __user *s, size_t count, unsigned int base, s8 *res);
static inline int __must_check kstrtou64_from_user(const char __user *s, size_t count, unsigned int base, u64 *res)
{
return kstrtoull_from_user(s, count, base, res);
}
static inline int __must_check kstrtos64_from_user(const char __user *s, size_t count, unsigned int base, s64 *res)
{
return kstrtoll_from_user(s, count, base, res);
}
static inline int __must_check kstrtou32_from_user(const char __user *s, size_t count, unsigned int base, u32 *res)
{
return kstrtouint_from_user(s, count, base, res);
}
static inline int __must_check kstrtos32_from_user(const char __user *s, size_t count, unsigned int base, s32 *res)
{
return kstrtoint_from_user(s, count, base, res);
}
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39)
/*
* kstrto* was included in kernel 2.6.38.4 and causes conflicts with the
* version included in compat-drivers. We use strict_strtol to check if
* kstrto* is already available.
*/
#ifndef strict_strtoull
/* Internal, do not use. */
int __must_check _kstrtoul(const char *s, unsigned int base, unsigned long *res);
int __must_check _kstrtol(const char *s, unsigned int base, long *res);
int __must_check kstrtoull(const char *s, unsigned int base, unsigned long long *res);
int __must_check kstrtoll(const char *s, unsigned int base, long long *res);
static inline int __must_check kstrtoul(const char *s, unsigned int base, unsigned long *res)
{
/*
* We want to shortcut function call, but
* __builtin_types_compatible_p(unsigned long, unsigned long long) = 0.
*/
if (sizeof(unsigned long) == sizeof(unsigned long long) &&
__alignof__(unsigned long) == __alignof__(unsigned long long))
return kstrtoull(s, base, (unsigned long long *)res);
else
return _kstrtoul(s, base, res);
}
static inline int __must_check kstrtol(const char *s, unsigned int base, long *res)
{
/*
* We want to shortcut function call, but
* __builtin_types_compatible_p(long, long long) = 0.
*/
if (sizeof(long) == sizeof(long long) &&
__alignof__(long) == __alignof__(long long))
return kstrtoll(s, base, (long long *)res);
else
return _kstrtol(s, base, res);
}
int __must_check kstrtouint(const char *s, unsigned int base, unsigned int *res);
int __must_check kstrtoint(const char *s, unsigned int base, int *res);
static inline int __must_check kstrtou64(const char *s, unsigned int base, u64 *res)
{
return kstrtoull(s, base, res);
}
static inline int __must_check kstrtos64(const char *s, unsigned int base, s64 *res)
{
return kstrtoll(s, base, res);
}
static inline int __must_check kstrtou32(const char *s, unsigned int base, u32 *res)
{
return kstrtouint(s, base, res);
}
static inline int __must_check kstrtos32(const char *s, unsigned int base, s32 *res)
{
return kstrtoint(s, base, res);
}
int __must_check kstrtou16(const char *s, unsigned int base, u16 *res);
int __must_check kstrtos16(const char *s, unsigned int base, s16 *res);
int __must_check kstrtou8(const char *s, unsigned int base, u8 *res);
int __must_check kstrtos8(const char *s, unsigned int base, s8 *res);
#endif /* ifndef strict_strtol */
#endif /* < 2.6.39 */
#ifndef USHRT_MAX
#define USHRT_MAX ((u16)(~0U))
#endif
#ifndef SHRT_MAX
#define SHRT_MAX ((s16)(USHRT_MAX>>1))
#endif
#ifndef SHRT_MIN
#define SHRT_MIN ((s16)(-SHRT_MAX - 1))
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35)
#define hex_to_bin LINUX_BACKPORT(hex_to_bin)
int hex_to_bin(char ch);
#endif
#ifndef __round_mask
#define __round_mask(x, y) ((__typeof__(x))((y)-1))
#define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)
#define round_down(x, y) ((x) & ~__round_mask(x, y))
#endif
#ifndef DIV_ROUND_CLOSEST
#define DIV_ROUND_CLOSEST(x, divisor) ({ \
typeof(divisor) __divisor = divisor; \
(((x) + ((__divisor) / 2)) / (__divisor)); \
})
#endif
#ifndef swap
#define swap(a, b) \
do { typeof(a) __tmp = (a); (a) = (b); (b) = __tmp; } while (0)
#endif
#ifndef lower_32_bits
#define lower_32_bits(n) ((u32)(n))
#endif
#ifndef USHORT_MAX
#define USHORT_MAX ((u16)(~0U))
#define SHORT_MAX ((s16)(USHORT_MAX>>1))
#define SHORT_MIN (-SHORT_MAX - 1)
#endif
#ifndef clamp
#define clamp(val, min, max) ({ \
typeof(val) __val = (val); \
typeof(min) __min = (min); \
typeof(max) __max = (max); \
(void) (&__val == &__min); \
(void) (&__val == &__max); \
__val = __val < __min ? __min: __val; \
__val > __max ? __max: __val; })
#endif
#ifndef clamp_t
#define clamp_t(type, val, min, max) ({ \
type __val = (val); \
type __min = (min); \
type __max = (max); \
__val = __val < __min ? __min: __val; \
__val > __max ? __max: __val; })
#endif
#ifndef clamp_val
#define clamp_val(val, min, max) ({ \
typeof(val) __val = (val); \
typeof(val) __min = (min); \
typeof(val) __max = (max); \
__val = __val < __min ? __min: __val; \
__val > __max ? __max: __val; })
#endif
#endif /* __BACKPORT_KERNEL_H */
/*
* We have to do this outside the include guard, because
* out own header (linux/export.h) has to include kernel.h
* indirectly (through module.h) and then undef's pr_fmt.
* Then, when the real kernel.h gets included again, it's
* not defined and we get problems ...
*/
#ifndef pr_fmt
#define pr_fmt(msg) msg
#endif
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