New and bogus(!) warning produced by sparse.

From: Anton Altaparmakov (aia21_at_cam.ac.uk)
Date: 09/30/05

  • Next message: Luben Tuikov: "Re: I request inclusion of SAS Transport Layer and AIC-94xx into the kernel" 
    Date:	Fri, 30 Sep 2005 15:03:08 +0100 (BST)
To: Linus Torvalds <torvalds@osdl.org>

    Hi Linus,

    I just did a git pull on sparse and it produced a new and I believe
    bogus warning when trying to assign a value to a bit field member. The
    warning is:

    warning: generating address of non-lvalue (1)

    Below is an example program that triggers the warning when you run:

            sparse sparse-test.c

    Best regards,

            Anton 

    -- 
Anton Altaparmakov <aia21 at cam.ac.uk> (replace at with @)
Unix Support, Computing Service, University of Cambridge, CB2 3QH, UK
Linux NTFS maintainer / IRC: #ntfs on irc.freenode.net
WWW: http://linux-ntfs.sf.net/ & http://www-stu.christs.cam.ac.uk/~aia21/
--- sparse-test.c ---
int main(void)
{
	struct {
		unsigned bit1:1;
		unsigned bit2:1;
	} bits = { 0, 0 };
	bits.bit1 = 1; /* sparse warns here! */
	bits.bit2 = 0; /* sparse warns here! */
	return 0;
}
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