Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#ifndef __UM_SYSTEM_GENERIC_H
2#define __UM_SYSTEM_GENERIC_H
3
4#include "asm/arch/system.h"
5
6#undef switch_to
7#undef local_irq_save
8#undef local_irq_restore
9#undef local_irq_disable
10#undef local_irq_enable
11#undef local_save_flags
12#undef local_irq_restore
13#undef local_irq_enable
14#undef local_irq_disable
15#undef local_irq_save
16#undef irqs_disabled
17
18extern void *switch_to(void *prev, void *next, void *last);
19
20extern int get_signals(void);
21extern int set_signals(int enable);
22extern int get_signals(void);
23extern void block_signals(void);
24extern void unblock_signals(void);
25
26#define local_save_flags(flags) do { typecheck(unsigned long, flags); \
27 (flags) = get_signals(); } while(0)
28#define local_irq_restore(flags) do { typecheck(unsigned long, flags); \
29 set_signals(flags); } while(0)
30
31#define local_irq_save(flags) do { local_save_flags(flags); \
32 local_irq_disable(); } while(0)
33
34#define local_irq_enable() unblock_signals()
35#define local_irq_disable() block_signals()
36
37#define irqs_disabled() \
38({ \
39 unsigned long flags; \
40 local_save_flags(flags); \
41 (flags == 0); \
42})
43
44extern void *_switch_to(void *prev, void *next, void *last);
45#define switch_to(prev, next, last) prev = _switch_to(prev, next, last)
46
47#endif