1/**
2 * @file compat24.h
3 * Compatability functions for 2.4 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 COMPAT24_H
13#define COMPAT24_H
14
15#include <linux/version.h>
16
17static inline pid_t op_get_tgid(void)
18{
19	return current->tgid;
20}
21
22#define pte_page_address(a) page_address(pte_page(a))
23#define oprof_wake_up(w) wake_up(w)
24#define lock_rtc(f) spin_lock_irqsave(&rtc_lock, f)
25#define unlock_rtc(f) spin_unlock_irqrestore(&rtc_lock, f)
26#define wind_dentries(d, v, r, m) wind_dentries_2_4(d, v, r, m)
27extern uint do_path_hash_2_4(struct dentry * dentry, struct vfsmount * vfsmnt);
28#define hash_path(f) do_path_hash_2_4((f)->f_dentry, (f)->f_vfsmnt)
29#define request_region_check request_region
30#define op_cpu_id() cpu_number_map(smp_processor_id())
31#define GET_VM_OFFSET(v) ((v)->vm_pgoff << PAGE_SHIFT)
32#define PTRACE_OFF(t) ((t)->ptrace &= ~PT_DTRACE)
33#define lock_execve() do { } while (0)
34#define unlock_execve() do { } while (0)
35#define lock_out_mmap() do { } while (0)
36#define unlock_out_mmap() do { } while (0)
37#define HAVE_MMAP2
38#define HAVE_FILE_OPERATIONS_OWNER
39
40/* ->owner field in 2.4 */
41#define INC_USE_COUNT_MAYBE
42#define DEC_USE_COUNT_MAYBE
43
44/* no global waitqueue spinlock in 2.4 */
45#define wq_is_lockable() (1)
46
47/* 2.4.3 introduced rw mmap semaphore  */
48#if V_AT_LEAST(2, 4, 3)
49	#define lock_mmap(mm) down_read(&mm->mmap_sem)
50	#define unlock_mmap(mm) up_read(&mm->mmap_sem)
51#else
52	#define lock_mmap(mm) down(&mm->mmap_sem)
53	#define unlock_mmap(mm) up(&mm->mmap_sem)
54#endif
55
56/* 2.4.26 exported the needed stuff for HT support */
57#if V_AT_LEAST(2, 4, 26) && defined(CONFIG_SMP)
58#define HT_SUPPORT
59#endif
60
61#endif /* COMPAT24_H */
62