On Sun, Apr 17, 2016 at 02:12:47AM +0200, Arnd Bergmann wrote:
> The patch to make uartlite_be/uartlite_le const was well-intended but
> caused a new build warning:
>
> tty/serial/uartlite.c: In function 'ulite_request_port':
> tty/serial/uartlite.c:348:21: error: assignment discards 'const' qualifier from pointer target type [-Werror=discarded-qualifiers]
> tty/serial/uartlite.c:354:22: error: assignment discards 'const' qualifier from pointer target type [-Werror=discarded-qualifiers]
>
> It would be nice to allow passing const pointers through
> port->private_data, but that would be way more work, so this
> reverts part of the original commit for now.
>
> A possible alternative might be to pass a structure in the private_data
> that contains a const pointer to the operations, which introduces a little
> extra overhead, or we could just add a cast to a non-const pointer, I'll
> leave that to the maintainer.
>
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> Fixes: 2905697a82ea ("serial-uartlite: Constify uartlite_be/uartlite_le")
> ---
> drivers/tty/serial/uartlite.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> I sent this patch on March 10, but it never made it in.
>
> Greg, could you apply the patch as a bugfix for 4.6? The warning is
> annoying as it shows up in several defconfig builds and allmodconfig.
Ugh, sorry about this, will get to it soon...
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