Re: linux-next: build failure after merge of the mac80211-next tree
From: Johannes Berg
Date: Wed Feb 24 2016 - 03:12:50 EST
> include/linux/bug.h:74:2: note: in expansion of macro
> Â BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
> Â ^
> net/rfkill/core.c:647:2: note: in expansion of macro 'BUILD_BUG_ON'
> Â BUILD_BUG_ON(!rfkill_types[NUM_RFKILL_TYPES - 1]);
> Â ^
> Caused by commit
> Â 1f86443b4ffe ("net: rfkill: add rfkill_find_type function")
Thanks for the heads-up.
> Maybe the compiler version matters?ÂÂI am using gcc v5.2.0.
Hm. I'm usingÂDebian 5.3.1-8.
> Though, it seems to be that "!rfkill_types[NUM_RFKILL_TYPES - 1]" is
> not a constant expression since
> static const char *rfkill_types[NUM_RFKILL_TYPES]
> does not stop "rfkill_types[NUM_RFKILL_TYPES - 1]" being modified at
> run time. I think that you might need:
> static const char * const rfkill_types[NUM_RFKILL_TYPES]
That's true, but since I can't test it I'll just solve this
differently. We'll never be able to insert anything into the middle, so
we can also just BUILD_BUG_ON() the ARRAY_SIZE() and do the code a bit