Re: [PATCH v3 22/23] powerpc/vdso: Migrate native signals to generic vdso_base

[Christophe Leroy]

Le 11/06/2021 à 20:02, Dmitry Safonov a écrit :
> Generic way to track the land vma area.
> Stat speaks for itself.
>
> Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
> Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
> Cc: Paul Mackerras <paulus@xxxxxxxxx>
> Signed-off-by: Dmitry Safonov <dima@xxxxxxxxxx>


Build failure:

  CC      arch/powerpc/kernel/asm-offsets.s
In file included from ./include/linux/mmzone.h:21,
                 from ./include/linux/gfp.h:6,
                 from ./include/linux/xarray.h:14,
                 from ./include/linux/radix-tree.h:19,
                 from ./include/linux/fs.h:15,
                 from ./include/linux/compat.h:17,
                 from arch/powerpc/kernel/asm-offsets.c:14:
./include/linux/mm_types.h: In function 'init_vdso_base':
./include/linux/mm_types.h:522:28: error: 'TASK_SIZE_MAX' undeclared (first use in this function); 
did you mean 'XATTR_SIZE_MAX'?
  522 | #define UNMAPPED_VDSO_BASE TASK_SIZE_MAX
      |                            ^~~~~~~~~~~~~
./include/linux/mm_types.h:627:40: note: in expansion of macro 'UNMAPPED_VDSO_BASE'
  627 |         mm->vdso_base = (void __user *)UNMAPPED_VDSO_BASE;
      |                                        ^~~~~~~~~~~~~~~~~~
./include/linux/mm_types.h:522:28: note: each undeclared identifier is reported only once for each 
function it appears in
  522 | #define UNMAPPED_VDSO_BASE TASK_SIZE_MAX
      |                            ^~~~~~~~~~~~~
./include/linux/mm_types.h:627:40: note: in expansion of macro 'UNMAPPED_VDSO_BASE'
  627 |         mm->vdso_base = (void __user *)UNMAPPED_VDSO_BASE;
      |                                        ^~~~~~~~~~~~~~~~~~
make[2]: *** [arch/powerpc/kernel/asm-offsets.s] Error 1
make[1]: *** [prepare0] Error 2
make: *** [__sub-make] Error 2