Hi On Fri, Apr 21, 2017 at 2:39 PM, Matthias Kaehlcke <[email protected]> wrote: > clang generates plenty of these warnings in different parts of the code. > They are mostly caused by container_of() and other macros which declare > a "const <type> *" variable for their internal use which triggers a > "duplicate 'const' specifier" warning if the <type> is already const > qualified. > > Wording-mostly-from: Michael Davidson <[email protected]> > Signed-off-by: Matthias Kaehlcke <[email protected]> > --- > Makefile | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/Makefile b/Makefile > index df5abf346354..6cd6d428db43 100644 > --- a/Makefile > +++ b/Makefile > @@ -704,6 +704,7 @@ KBUILD_CFLAGS += $(call cc-disable-warning, > unused-variable) > KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier) > KBUILD_CFLAGS += $(call cc-disable-warning, gnu) > KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) > +KBUILD_CFLAGS += $(call cc-disable-warning, duplicate-decl-specifier) > # Quiet clang warning: comparison of unsigned expression < 0 is always false > KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare) > # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as > the
It seems like gcc 7 may have the same warning. Specifically I saw a patch fly by from Arnd, which you can find in Mark Brown's tree now: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git/commit/?h=topic/rt5614&id=03ba791df98d15d07ea74075122af71e35c7611c +Arnd since he may be trying to solve the same issues? -Doug
