On Thu, Nov 12, 2020 at 1:23 PM Adrian Ratiu <[email protected]> wrote: > > From: Nathan Chancellor <[email protected]> > > Drop warning because kernel now requires GCC >= v4.9 after > commit 6ec4476ac825 ("Raise gcc version requirement to 4.9"). > > Reported-by: Nick Desaulniers <[email protected]> > Signed-off-by: Nathan Chancellor <[email protected]> > Signed-off-by: Adrian Ratiu <[email protected]>
Link: https://github.com/ClangBuiltLinux/linux/issues/496 Link: https://github.com/ClangBuiltLinux/linux/issues/503 Reviewed-by: Nick Desaulniers <[email protected]> > --- > arch/arm/lib/xor-neon.c | 9 +-------- > 1 file changed, 1 insertion(+), 8 deletions(-) > > diff --git a/arch/arm/lib/xor-neon.c b/arch/arm/lib/xor-neon.c > index b99dd8e1c93f..e1e76186ec23 100644 > --- a/arch/arm/lib/xor-neon.c > +++ b/arch/arm/lib/xor-neon.c > @@ -19,15 +19,8 @@ MODULE_LICENSE("GPL"); > * -ftree-vectorize) to attempt to exploit implicit parallelism and emit > * NEON instructions. > */ > -#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6) > +#ifdef CONFIG_CC_IS_GCC > #pragma GCC optimize "tree-vectorize" > -#else > -/* > - * While older versions of GCC do not generate incorrect code, they fail to > - * recognize the parallel nature of these functions, and emit plain ARM code, > - * which is known to be slower than the optimized ARM code in asm-arm/xor.h. > - */ > -#warning This code requires at least version 4.6 of GCC > #endif > > #pragma GCC diagnostic ignored "-Wunused-variable" > -- > 2.29.2 > -- Thanks, ~Nick Desaulniers
