linux-kernel - Is it possible to directly call do_path

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Message-ID: <4ae3c140701231032xd6eca27td46cc1c25e150e25@mail.gmail.com>
Date:	Tue, 23 Jan 2007 13:32:17 -0500
From:	"Xin Zhao" <uszhaoxin@...il.com>
To:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Is it possible to directly call do_path_lookup() in kernel?

Hi,

I tried to call the following code in a kernel module:

	error = do_path_lookup(AT_FDCWD, "/etc/profile.d/glib2.csh",
LOOKUP_PARENT, &nd);

I exported the function do_path_lookup() using
"EXPORT_SYMBOL_GPL(do_path_lookup);"

But do_path_lookup() caused the "general protection fault: 0000 [#1]"
kernel error.

I thought it could be the problem of protection error, so I used the
following codes to enclose the code that calls do_path_lookup(), but
still got the same error.

	fs = get_fs ();							  /* save previous value */
	set_fs (KERNEL_DS);						  /* use kernel limit */
        ......
        set_fs(fs);

Any idea on this?

Thanks a lot!

-x
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