From mboxrd@z Thu Jan  1 00:00:00 1970
From: Johannes Berg <johannes@sipsolutions.net>
Subject: cannot size expression - exported array in kernel
Date: Mon, 21 Nov 2011 11:06:57 +0100
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Here's some code from net/wireless/util.c, expressed as a test case. I
have no idea how to fix it. The actual output is:

+sizeof-external.c:11:16: error: cannot size expression

while none is expected.

johannes

/***** begin file validation/sizeof-external.c **** */
/* #include file that declares it */
extern const unsigned char bridge_tunnel_header[6];

/* define it */
const unsigned char bridge_tunnel_header[] = { 1, 2, 3, 4, 5, 6 };
/* EXPORT_SYMBOL it */
extern typeof(bridge_tunnel_header) bridge_tunnel_header; /* ... */

static int bth_size(void)
{
	return sizeof(bridge_tunnel_header);
}

/*
 * check-name: Check sizeof(kernel_exported_external_variable)
 *
 * check-error-start
 * check-error-end
 */