On Wed, Jul 24, 2019 at 3:33 AM Thomas Gleixner wrote:
>
> On Tue, 23 Jul 2019, Nick Desaulniers wrote:
> > Instead, reuse an implementation from arch/x86/boot/compressed/string.c
> > if we define warn as a symbol. Also, Clang may lower memcmp's that
> > compare against 0 to bcmp's, so add a small
On Tue, 23 Jul 2019, Nick Desaulniers wrote:
> Instead, reuse an implementation from arch/x86/boot/compressed/string.c
> if we define warn as a symbol. Also, Clang may lower memcmp's that
> compare against 0 to bcmp's, so add a small definition, too. See also:
> commit 5f074f3e192f ("lib/string.c:
Implementing memcpy and memset in terms of __builtin_memcpy and
__builtin_memset is problematic.
GCC at -O2 will replace calls to the builtins with calls to memcpy and
memset (but will generate an inline implementation at -Os). Clang will
replace the builtins with these calls regardless of optimi
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