puzzle about open in kernel

["madsys" <admin@ercist.iscas.ac.cn>]

hi all,
	
	I have a puzzle about open() in kernel lately.

	see below please:

	init/main.c [init()]:
	---snip---
	if (open("/dev/console", O_RDWR, 0) < 0)
		printk("Warning: unable to open an initial console.\n");
	---snip---
	
    I know that open() is a wrapper of system call. But who can tell me why the kernel use system call "open" instead of the direct sys_open function in the kernel? Can we change it to the sys_open function here?
	

	thanx in advanced!
	madsys



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