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1408 | serge | 1 | #ifndef _LINUX_KERNEL_H |
2 | #define _LINUX_KERNEL_H |
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3 | |||
4 | /* |
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5 | * 'kernel.h' contains some often-used function prototypes etc |
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6 | */ |
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7 | |||
8 | #ifdef __KERNEL__ |
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9 | |||
10 | #include |
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11 | #include |
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12 | #include |
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13 | #include |
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14 | |||
15 | #define USHORT_MAX ((u16)(~0U)) |
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16 | #define SHORT_MAX ((s16)(USHORT_MAX>>1)) |
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17 | #define SHORT_MIN (-SHORT_MAX - 1) |
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18 | #define INT_MAX ((int)(~0U>>1)) |
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19 | #define INT_MIN (-INT_MAX - 1) |
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20 | #define UINT_MAX (~0U) |
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21 | #define LONG_MAX ((long)(~0UL>>1)) |
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22 | #define LONG_MIN (-LONG_MAX - 1) |
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23 | #define ULONG_MAX (~0UL) |
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24 | #define LLONG_MAX ((long long)(~0ULL>>1)) |
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25 | #define LLONG_MIN (-LLONG_MAX - 1) |
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26 | #define ULLONG_MAX (~0ULL) |
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27 | |||
28 | #define ALIGN(x,a) __ALIGN_MASK(x,(typeof(x))(a)-1) |
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29 | #define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask)) |
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30 | #define PTR_ALIGN(p, a) ((typeof(p))ALIGN((unsigned long)(p), (a))) |
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31 | #define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0) |
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32 | |||
33 | /** |
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34 | * upper_32_bits - return bits 32-63 of a number |
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35 | * @n: the number we're accessing |
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36 | * |
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37 | * A basic shift-right of a 64- or 32-bit quantity. Use this to suppress |
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38 | * the "right shift count >= width of type" warning when that quantity is |
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39 | * 32-bits. |
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40 | */ |
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41 | #define upper_32_bits(n) ((u32)(((n) >> 16) >> 16)) |
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42 | |||
43 | /** |
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44 | * lower_32_bits - return bits 0-31 of a number |
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45 | * @n: the number we're accessing |
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46 | */ |
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47 | #define lower_32_bits(n) ((u32)(n)) |
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48 | |||
49 | |||
50 | #define KERN_EMERG "<0>" /* system is unusable */ |
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51 | #define KERN_ALERT "<1>" /* action must be taken immediately */ |
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52 | #define KERN_CRIT "<2>" /* critical conditions */ |
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53 | #define KERN_ERR "<3>" /* error conditions */ |
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54 | #define KERN_WARNING "<4>" /* warning conditions */ |
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55 | #define KERN_NOTICE "<5>" /* normal but significant condition */ |
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56 | #define KERN_INFO "<6>" /* informational */ |
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57 | #define KERN_DEBUG "<7>" /* debug-level messages */ |
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58 | |||
59 | //int printk(const char *fmt, ...); |
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60 | |||
61 | #define printk(fmt, arg...) dbgprintf(fmt , ##arg) |
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62 | |||
63 | |||
64 | /* |
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65 | * min()/max()/clamp() macros that also do |
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66 | * strict type-checking.. See the |
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67 | * "unnecessary" pointer comparison. |
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68 | */ |
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69 | #define min(x, y) ({ \ |
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70 | typeof(x) _min1 = (x); \ |
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71 | typeof(y) _min2 = (y); \ |
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72 | (void) (&_min1 == &_min2); \ |
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73 | _min1 < _min2 ? _min1 : _min2; }) |
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74 | |||
75 | #define max(x, y) ({ \ |
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76 | typeof(x) _max1 = (x); \ |
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77 | typeof(y) _max2 = (y); \ |
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78 | (void) (&_max1 == &_max2); \ |
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79 | _max1 > _max2 ? _max1 : _max2; }) |
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80 | |||
81 | /* |
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82 | * ..and if you can't take the strict |
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83 | * types, you can specify one yourself. |
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84 | * |
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85 | * Or not use min/max/clamp at all, of course. |
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86 | */ |
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87 | #define min_t(type, x, y) ({ \ |
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88 | type __min1 = (x); \ |
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89 | type __min2 = (y); \ |
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90 | __min1 < __min2 ? __min1: __min2; }) |
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91 | |||
92 | #define max_t(type, x, y) ({ \ |
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93 | type __max1 = (x); \ |
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94 | type __max2 = (y); \ |
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95 | __max1 > __max2 ? __max1: __max2; }) |
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96 | |||
97 | /** |
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98 | * container_of - cast a member of a structure out to the containing structure |
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99 | * @ptr: the pointer to the member. |
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100 | * @type: the type of the container struct this is embedded in. |
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101 | * @member: the name of the member within the struct. |
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102 | * |
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103 | */ |
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104 | #define container_of(ptr, type, member) ({ \ |
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105 | const typeof( ((type *)0)->member ) *__mptr = (ptr); \ |
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106 | (type *)( (char *)__mptr - offsetof(type,member) );}) |
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107 | |||
108 | |||
109 | static inline void *kcalloc(size_t n, size_t size, uint32_t flags) |
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110 | { |
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111 | if (n != 0 && size > ULONG_MAX / n) |
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112 | return NULL; |
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113 | return kzalloc(n * size, 0); |
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114 | } |
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115 | |||
116 | #endif /* __KERNEL__ */ |
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117 | |||
118 | typedef unsigned long pgprotval_t; |
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119 | |||
120 | typedef struct pgprot { pgprotval_t pgprot; } pgprot_t; |
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121 | |||
122 | struct file {}; |
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123 | struct vm_area_struct {}; |
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124 | struct address_space {}; |
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125 | |||
126 | #define preempt_disable() do { } while (0) |
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127 | #define preempt_enable_no_resched() do { } while (0) |
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128 | #define preempt_enable() do { } while (0) |
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129 | #define preempt_check_resched() do { } while (0) |
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130 | |||
131 | #define preempt_disable_notrace() do { } while (0) |
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132 | #define preempt_enable_no_resched_notrace() do { } while (0) |
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133 | #define preempt_enable_notrace() do { } while (0) |
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134 | |||
135 | |||
136 | |||
137 | void free (void *ptr); |
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138 | |||
139 | #endif>>7>6>5>4>3>2>1>0> |
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140 |