new compat_kernel.h

compat_kernel.h (text/plain), 1.21 KB, created by Florian Demski on 2006-12-07 09:09:27 UTC

#ifndef __COMPAT_KERNEL_H__
#   define __COMPAT_KERNEL_H__

#include <asm/unistd.h>

/*
 * Used by _syscallX macros. Note that this is global variable, so
 * do not rely on its contents too much. As exit() is only function
 * we use, and we never check return value from exit(), we have
 * no problem...
 */
extern int errno;


/*
 * compat_exit() provides an access to the exit() function. It must 
 * be named compat_exit(), as exit() (with different signature) is 
 * provided by x86-64, arm and other (but not by i386).
 */
//#define __NR_compat_exit __NR_exit
//static inline _syscall1(int, compat_exit, int, exit_code);


/*
 * wait_for_completion and friends did not exist before 2.4.9.
 */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 4, 9)

#define compat_complete_and_exit(comp, status) complete_and_exit(comp, status)

#else

/*
 * See compat_wait_for_completion in compat_completion.h.
 * compat_exit implicitly performs an unlock_kernel, in resident code,
 * ensuring that the thread is no longer running in module code when the
 * module is unloaded.
 */
#define compat_complete_and_exit(comp, status) do { \
   lock_kernel(); \
   up(comp); \
   compat_exit(status); \
} while (0)

#endif


#endif /* __COMPAT_KERNEL_H__ */