On Thu, Feb 22, 2024 at 10:35 PM Petr Pavlu <petr.pavlu@xxxxxxxx> wrote: > > GCC recently added option -fmin-function-alignment, which should appear > in GCC 14. Unlike -falign-functions, this option causes all functions to > be aligned at the specified value, including the cold ones. > > In particular, when an arm64 kernel is built with > DYNAMIC_FTRACE_WITH_CALL_OPS=y, the 8-byte function alignment is > required for correct functionality. This was done by -falign-functions=8 > and having workarounds in the kernel to force the compiler to follow > this alignment. The new -fmin-function-alignment option directly > guarantees it. > > Detect availability of -fmin-function-alignment and use it instead of > -falign-functions when present. Introduce CC_HAS_SANE_FUNCTION_ALIGNMENT > and enable __cold to work as expected when it is set. > > Signed-off-by: Petr Pavlu <petr.pavlu@xxxxxxxx> > Reviewed-by: Nathan Chancellor <nathan@xxxxxxxxxx> > Acked-by: Mark Rutland <mark.rutland@xxxxxxx> > --- Applied to linux-kbuild. Thanks. -- Best Regards Masahiro Yamada
