Re: [PATCH] powerpc/signal32: Fix build failure with CONFIG_SPE

On Sun, 11 Apr 2021 16:39:53 +0000 (UTC), Christophe Leroy wrote:

Add missing fault exit label in unsafe_copy_from_user() in order to
avoid following build failure with CONFIG_SPE

  CC      arch/powerpc/kernel/signal_32.o
arch/powerpc/kernel/signal_32.c: In function 'restore_user_regs':
arch/powerpc/kernel/signal_32.c:565:36: error: macro "unsafe_copy_from_user" requires 4 arguments, but only 3 given
  565 |           ELF_NEVRREG * sizeof(u32));
      |                                    ^
In file included from ./include/linux/uaccess.h:11,
                 from ./include/linux/sched/task.h:11,
                 from ./include/linux/sched/signal.h:9,
                 from ./include/linux/rcuwait.h:6,
                 from ./include/linux/percpu-rwsem.h:7,
                 from ./include/linux/fs.h:33,
                 from ./include/linux/huge_mm.h:8,
                 from ./include/linux/mm.h:707,
                 from arch/powerpc/kernel/signal_32.c:17:
./arch/powerpc/include/asm/uaccess.h:428: note: macro "unsafe_copy_from_user" defined here
  428 | #define unsafe_copy_from_user(d, s, l, e) \
      |
arch/powerpc/kernel/signal_32.c:564:3: error: 'unsafe_copy_from_user' undeclared (first use in this function); did you mean 'raw_copy_from_user'?
  564 |   unsafe_copy_from_user(current->thread.evr, &sr->mc_vregs,
      |   ^~~~~~~~~~~~~~~~~~~~~
      |   raw_copy_from_user
arch/powerpc/kernel/signal_32.c:564:3: note: each undeclared identifier is reported only once for each function it appears in
make[3]: *** [arch/powerpc/kernel/signal_32.o] Error 1

Applied to powerpc/next.

[1/1] powerpc/signal32: Fix build failure with CONFIG_SPE
      https://git.kernel.org/powerpc/c/af072b1a9d4d9edc24da84a071b0671e147026cb

cheers