On Tue, Jun 21, 2022 at 6:35 AM Miko Larsson <mikoxyzzz@xxxxxxxxx> wrote: > > Hi, > > This very small series allows -O3 to be used for all architectures. The > first patch marks -O3 as experimental, with the reasoning being that it > might expose unwanted regressions to users, and the second patch > actually allows -O3 by removing the "depend on ARC" string. I think we should just remove -O3 support from KCONFIG. If someone wants to mess around with "experimental features," there's nothing stopping you from doing: $ make KCFLAGS=-O3 > > The reasoning behind this series is to open up -O3 so that bugs related > to it (both compiler-related and kernel-related) can be discovered by > eyeballs wanting to improve the "-O3 experience," as that might be > beneficial to both compilers and the kernel. This has been attempted > before [1], but unfortunately nothing ever came of it. > > [1] https://lore.kernel.org/lkml/20191211104619.114557-1-oleksandr@xxxxxxxxxx/ > > Cc: linux-kbuild@xxxxxxxxxxxxxxx > Cc: x86@xxxxxxxxxx > Cc: Nathan Chancellor <nathan@xxxxxxxxxx> > Cc: Vlastimil Babka <vbabka@xxxxxxx> > Cc: Nick Desaulniers <ndesaulniers@xxxxxxxxxx> > Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > Cc: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> > Cc: Sean Christopherson <seanjc@xxxxxxxxxx> > Cc: "Gustavo A. R. Silva" <gustavoars@xxxxxxxxxx> > Cc: Arnd Bergmann <arnd@xxxxxxxx> > Cc: Chris Down <chris@xxxxxxxxxxxxxx> > Cc: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx> > Cc: John Ogness <john.ogness@xxxxxxxxxxxxx> > Cc: Elliot Berman <quic_eberman@xxxxxxxxxxx> > Cc: Oleksandr Natalenko <oleksandr@xxxxxxxxxx> > > Miko Larsson (2): > Kconfig: Mark -O3 as experimental > Kconfig: Allow -O3 for all architectures > > init/Kconfig | 6 ++++-- > 1 file changed, 4 insertions(+), 2 deletions(-) > > -- > 2.36.1 > -- Thanks, ~Nick Desaulniers
