On Wed, Dec 09, 2015 at 05:42:41PM +0100, Arnd Bergmann wrote: > With the new optimized do_div() code, some versions of gcc > produce obviously incorrect code that leads to a link error > in iwlegacy/common.o: > > drivers/built-in.o: In function `il_send_rxon_timing': > :(.text+0xa6b4d4): undefined reference to `____ilog2_NaN' > :(.text+0xa6b4f0): undefined reference to `__aeabi_uldivmod' > > In a few thousand randconfig builds, I have seen this problem > a couple of times in this file, but never anywhere else in the > kernel, so we can try to work around this in the only file > that shows the behavior, by marking the il_adjust_beacon_interval > function as noinline, which convinces gcc to use the unoptimized > do_div() all the time. I don't think this is good way to "fix" the issue, but also have nothing against to this particular change. Acked-by: Stanislaw Gruszka <sgruszka@xxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
