Messages in this thread | | | Date | Thu, 25 Jun 2020 23:52:47 -0700 | From | Nathan Chancellor <> | Subject | Re: drivers/char/hw_random/npcm-rng.c:166:34: warning: unused variable 'rng_dt_id' |
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On Fri, Jun 26, 2020 at 04:42:25PM +1000, Herbert Xu wrote: > On Tue, Jun 23, 2020 at 09:58:39PM +0800, kernel test robot wrote: > > > > >> drivers/char/hw_random/npcm-rng.c:166:34: warning: unused variable 'rng_dt_id' [-Wunused-const-variable] > > static const struct of_device_id rng_dt_id[] = { > > ^ > > 1 warning generated. > > The kernel is supposed to be built with -Wno-unused-const-variable, > so I guess this is a deficiency in clang. > > Cheers, > -- > Email: Herbert Xu <herbert@gondor.apana.org.au> > Home Page: http://gondor.apana.org.au/~herbert/ > PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt >
No deficiency in clang, it's a W=1 build, which explicitly enables -Wunused-const-variable per scripts/Kbuild.extrawarn. The 0day team decided to enable W=1 for all build tests, hence the comment in the reproduce notes. A thread with discussion:
https://lore.kernel.org/lkml/202005200123.gFjGzJEH%25lkp@intel.com/
Cheers, Nathan
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