On Thu, Oct 17, 2013 at 01:31:47PM -0700, Guenter Roeck wrote: > On Thu, Oct 17, 2013 at 01:25:48PM -0400, Josh Boyer wrote: > > On Wed, Oct 16, 2013 at 07:18:41PM -0700, Guenter Roeck wrote: > > > Commit 3fa4d734 (usb: phy: rename nop_usb_xceiv => usb_phy_gen_xceiv) > > > changed the conditional around the declaration of usb_nop_xceiv_register > > > from > > > #if defined(CONFIG_NOP_USB_XCEIV) || > > > (defined(CONFIG_NOP_USB_XCEIV_MODULE) && defined(MODULE)) > > > to > > > #if IS_ENABLED(CONFIG_NOP_USB_XCEIV) > > > > > > While that looks the same, it is semantically different. The first > > > expression > > > is true if CONFIG_NOP_USB_XCEIV is built as module and if the including > > > code is built as module. The second expression is true if code depending > > > on > > > CONFIG_NOP_USB_XCEIV if built as module or into the kernel. > > > > > > As a result, the arm:allmodconfig build fails with > > > > > > arch/arm/mach-omap2/built-in.o: In function `omap3_evm_init': > > > arch/arm/mach-omap2/board-omap3evm.c:703: undefined reference to > > > `usb_nop_xceiv_register' > > > > > > Fix the problem by reverting to the old conditional. > > > > > > Cc: Josh Boyer <[email protected]> > > > Signed-off-by: Guenter Roeck <[email protected]> > > > > I'm not entirely sure why I was CC'd on this one, but the patch looks > > good to me. I do wonder how many other uses of IS_ENABLED aren't taking > > this into account though. > > > Unless I am wrong, you submitted a different patch to fix the same problem, > which went nowhere, so I figured it was appropriate to Cc: you on this one. > If not, my apologies.
Ah, so I did! Amazing what I can forget in a month. > As for other use cases of IS_ENABLED, agreed, that may be an ongoing concern. > That will have to be addressed individually, though. Yep. josh -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
