1 /**
2 * @file compat22.h
3 * Compatability functions for 2.2 kernels
4 *
5 * @remark Copyright 2002 OProfile authors
6 * @remark Read the file COPYING
7 *
8 * @author John Levon
9 * @author Philippe Elie
10 */
11
12 #ifndef COMPAT22_H
13 #define COMPAT22_H
14
15 #include <linux/smp_lock.h>
16
17 #define local_irq_disable() __cli()
18 #define local_irq_enable() __sti()
19 #define pte_page_address(a) pte_page(a)
20
21 #define GET_VM_OFFSET(v) ((v)->vm_offset)
22 #define MODULE_LICENSE(l)
23 #define NEED_2_2_DENTRIES
24 #define INC_USE_COUNT_MAYBE MOD_INC_USE_COUNT
25 #define DEC_USE_COUNT_MAYBE MOD_DEC_USE_COUNT
26 #define lock_execve lock_kernel
27 #define unlock_execve unlock_kernel
28
29 /* BKL-protected on 2.2 */
30 #define lock_mmap(mm) do {} while (0)
31 #define unlock_mmap(mm) do {} while (0)
32
33 /* on 2.2 we use pid as tgid, thread seperation is possible but
34 * each thread is in its own thread group */
op_get_tgid(void)35 static inline pid_t op_get_tgid(void)
36 {
37 return current->pid;
38 }
39
40 /* the wake_up path doesn't disable interrupts for wait queue
41 * manipulation. So let's force it to.
42 */
oprof_wake_up(struct wait_queue ** q)43 static inline void oprof_wake_up(struct wait_queue **q)
44 {
45 unsigned long flags;
46 save_flags(flags);
47 cli();
48 wake_up(q);
49 restore_flags(flags);
50 }
51
52 extern int wind_dentries_2_2(struct dentry * dentry);
53 extern uint do_path_hash_2_2(struct dentry * dentry);
54 #define wind_dentries(d, v, r, m) wind_dentries_2_2(d)
55 #define hash_path(f) do_path_hash_2_2((f)->f_dentry)
56
lock_out_mmap(void)57 static inline void lock_out_mmap(void)
58 {
59 lock_kernel();
60 down(¤t->mm->mmap_sem);
61 }
62
unlock_out_mmap(void)63 static inline void unlock_out_mmap(void)
64 {
65 unlock_kernel();
66 up(¤t->mm->mmap_sem);
67 }
68
69 /* different request_region */
70 #define request_region_check compat_request_region
71 void * compat_request_region (unsigned long start, unsigned long n, char const * name);
72
73 #define __exit
74
75 #define virt_to_page(va) MAP_NR(va)
76
77 /* 2.2 has no cpu_number_map on UP */
78 #ifdef CONFIG_SMP
79 #define op_cpu_id() cpu_number_map[smp_processor_id()]
80 #else
81 #define op_cpu_id() smp_processor_id()
82 #endif /* CONFIG_SMP */
83
84 /* provide a working smp_call_function */
85 #if !defined(CONFIG_SMP)
86
87 #undef smp_call_function
smp_call_function(void (* func)(void * info),void * info,int retry,int wait)88 static int inline smp_call_function (void (*func) (void * info), void * info,
89 int retry, int wait)
90 {
91 return 0;
92 }
93
94 #endif /* !CONFIG_SMP */
95
96 #if V_BEFORE(2, 2, 18)
97
98 /* 2.2.18 introduced module_init */
99 /* Not sure what version aliases were introduced in, but certainly in 2.91.66. */
100 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 91)
101 #define module_init(x) int init_module(void) __attribute__((alias(#x)));
102 #define module_exit(x) void cleanup_module(void) __attribute__((alias(#x)));
103 #else
104 #define module_init(x) int init_module(void) { return x(); }
105 #define module_exit(x) void cleanup_module(void) { x(); }
106 #endif
107
108 /* 2.2.18 introduced vmalloc_32 */
109 #define vmalloc_32 vmalloc
110
111 /* 2.2.18 add doubled linked list wait_queue and mutex */
112 #define DECLARE_WAIT_QUEUE_HEAD(q) struct wait_queue * q = NULL
113 #define DECLARE_MUTEX(foo) struct semaphore foo = MUTEX
114
115 /* 2.2.18 add THIS_MODULE */
116 #define THIS_MODULE (&__this_module)
117
118 /* 2.2.18 add BUG() FIXME: this is arch dependant would must use
119 * *(char *)0 = 0 instead ? */
120 #define BUG() __asm__ __volatile__("ud2\n");
121
122 #endif /* V_BEFORE(2,2,18) */
123
124 /* 2.2.18 introduced the rtc lock */
125 #ifdef RTC_LOCK
126 #define lock_rtc(f) spin_lock_irqsave(&rtc_lock, f)
127 #define unlock_rtc(f) spin_unlock_irqrestore(&rtc_lock, f)
128 #else
129 #define lock_rtc(f) do { save_flags(f); cli(); } while (0)
130 #define unlock_rtc(f) restore_flags(f)
131 #endif /* RTC_LOCK */
132
133 #if V_AT_LEAST(2, 2, 20)
134 #define PTRACE_OFF(t) ((t)->ptrace &= ~PT_DTRACE)
135 #else
136 #define PTRACE_OFF(t) ((t)->flags &= ~PF_DTRACE)
137 #endif
138
139 /* 2.2.21 introduced cpuid_edx */
140 #if V_BEFORE(2, 2, 21)
cpuid_edx(unsigned int op)141 static inline unsigned int cpuid_edx(unsigned int op)
142 {
143 unsigned int eax, edx;
144
145 __asm__("cpuid"
146 : "=a" (eax), "=d" (edx)
147 : "0" (op)
148 : "bx", "cx");
149 return edx;
150 }
151 #endif
152
153 #endif /* COMPAT22_H */
154