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x86, um: get rid of system.h -> system.h include

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Long-term we want to split system.h and include barriers part from
underlying target; for now copy that part to sysdep.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Al Viro
2008-08-18 03:25:24 -04:00
committed by H. Peter Anvin
parent 32926b3be1
commit 6a0eec8224
7 changed files with 266 additions and 55 deletions
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35
arch/um/include/asm/system.h Normal file
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@@ -0,0 +1,35 @@
#ifndef __UM_SYSTEM_GENERIC_H
#define __UM_SYSTEM_GENERIC_H
#include "sysdep/system.h"
extern void *switch_to(void *prev, void *next, void *last);
extern int get_signals(void);
extern int set_signals(int enable);
extern int get_signals(void);
extern void block_signals(void);
extern void unblock_signals(void);
#define local_save_flags(flags) do { typecheck(unsigned long, flags); \
(flags) = get_signals(); } while(0)
#define local_irq_restore(flags) do { typecheck(unsigned long, flags); \
set_signals(flags); } while(0)
#define local_irq_save(flags) do { local_save_flags(flags); \
local_irq_disable(); } while(0)
#define local_irq_enable() unblock_signals()
#define local_irq_disable() block_signals()
#define irqs_disabled() \
({ \
unsigned long flags; \
local_save_flags(flags); \
(flags == 0); \
})
extern void *_switch_to(void *prev, void *next, void *last);
#define switch_to(prev, next, last) prev = _switch_to(prev, next, last)
#endif