Date: Sat, 20 Feb 1999 23:05:09 +0100 (CET) From: Nick Hibma <hibma@skylink.it> To: FreeBSD current mailing list <freebsd-current@freebsd.org> Subject: const char * Message-ID: <Pine.BSF.3.96.990220224447.327A-100000@henny.plazza.it>
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With the new efforts in getting rid of all the warnings in the kernel
compiles I have a problem with the following warning:
../../dev/usb/ukbd.c: In function `ukbd_detach':
../../dev/usb/ukbd.c:373: warning: cast discards `const' from pointer
target type
produced by the following two lines in the USB code:
(dev/usb/ukbd.c)
ukbd_detach(device_t self)
{
...
const char *devinfo = device_get_desc(self);
...
free((void *)devinfo, M_USB);
It is a consequence of the following type definition:
(sys/bus_private.h)
struct device {
...
const char* desc; /* driver specific description */
...
}
One problem I have is that a string like that might be produced by
concatenating a few strings together. In the case of USB the desc is
the string returned by the device. At attach the string is created and
malloc()-ed, at detach free()-ed.
Anyone savvy enough to tell me what I need to change in the USB code to
get rid of the warning?
Cheers,
Nick
FreeBSD USB Driver Development
--
e-mail: n_hibma@freebsd.org
home page: http://www.etla.net/~n_hibma/usb/usb.pl
mailing list: usb-bsd@egroups.com
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