Re: parisc build failures in mainline kernel

[Guenter Roeck]

On 11/3/21 9:18 PM, Linus Torvalds wrote:
> On Wed, Nov 3, 2021 at 8:15 PM Guenter Roeck <linux@xxxxxxxxxxxx> wrote:
> > the mainline kernel fails to build almost all 'parisc' images.
>
> All with CONFIG_SMP?
I think so. tinyconfig (SMP=n) builds fine.

> Does this silly patch fix it?

Unfortunately not. With that patch it complains about task_struct.

In file included from arch/parisc/kernel/asm-offsets.c:24:
arch/parisc/kernel/asm-offsets.c: In function 'main':
././include/linux/compiler_types.h:140:41: error: 'struct task_struct' has no member named 'cpu'
  140 | #define __compiler_offsetof(a, b)       __builtin_offsetof(a, b)
      |                                         ^~~~~~~~~~~~~~~~~~
./include/linux/kbuild.h:6:69: note: in definition of macro 'DEFINE'
    6 |         asm volatile("\n.ascii \"->" #sym " %0 " #val "\"" : : "i" (val))
      |                                                                     ^~~
./include/linux/stddef.h:17:33: note: in expansion of macro '__compiler_offsetof'
   17 | #define offsetof(TYPE, MEMBER)  __compiler_offsetof(TYPE, MEMBER)
      |                                 ^~~~~~~~~~~~~~~~~~~
arch/parisc/kernel/asm-offsets.c:43:26: note: in expansion of macro 'offsetof'
   43 |         DEFINE(TASK_CPU, offsetof(struct task_struct, cpu));
      |                          ^~~~~~~~
make[1]: *** [scripts/Makefile.build:121: arch/parisc/kernel/asm-offsets.s] Error 1
make: *** [Makefile:1223: prepare0] Error 2

Guenter