On Mon, Feb 28, 2022 at 12:25 PM Mark Rutland <mark.rutland@xxxxxxx> wrote: > On Mon, Feb 28, 2022 at 11:27:43AM +0100, Arnd Bergmann wrote: > > > > Nathan Chancellor reported an additional -Wdeclaration-after-statement > > warning that appears in a system header on arm, this still needs a > > workaround. > > FWIW, I had a go at moving to c99 a few weeks ago (to be able to use > for-loop-declarations in some concurrency primitives), and when I tried, I also > saw declaration-after-statement warnings when building modpost.c, which is easy > enough to fix: > > https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git/commit/?h=treewide/gnu99&id=505775bd6fd0bc1883f3271f826963066bbdc194 I think the KBUILD_USERCFLAGS portion and the modpost.c fix for it make sense regardless of the -std=gnu11 change, but your change to KBUILD_CFLAGS is not actually needed because the warning is already enabled there -- gnu89 allows intermingled declarations since gcc-3.4, so the warning flag was added during early 2.6.x kernels. Arnd
