Re: arm-linux-gnueabihf-ld: kernel/rcu/update.o:update.c:(.text+0x1cc4): more undefined references to `__bad_cmpxchg' follow

On Thu, May 30, 2024, at 19:24, Paul E. McKenney wrote:

On Thu, May 30, 2024 at 09:37:21AM -0700, Paul E. McKenney wrote:

...

On Thu, May 30, 2024 at 03:27:58PM +0200, Arnd Bergmann wrote:

And for an untested first attempt at a fix.

What did I mess up this time? ;-)

I think only the comment:

switch (size) { -#ifndef CONFIG_CPU_V6 /* min ARCH >= ARMv6K */ +#ifdef CONFIG_CPU_V6 /* min ARCH >= ARMv6K */

• case 1:

• oldval = cmpxchg_emu_u8((volatile u8 *)ptr, old, new);
  

• break;
  

+#else

"min ARCH >= ARMv6K" now applies to the #else side, while the #if side is the early ARMv6 (pre-v6K).

Arnd