Re: [PATCH 4.9 00/16] 4.9.245-rc1 review

[Guenter Roeck]

On Fri, Nov 20, 2020 at 12:03:05PM +0100, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 4.9.245 release.
> There are 16 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Sun, 22 Nov 2020 10:45:32 +0000.
> Anything received after that time might be too late.
> 

Build results:
	total: 168 pass: 166 fail: 2
Failed builds:
	powerpc:cell_defconfig
	powerpc:maple_defconfig
Qemu test results:
	total: 382 pass: 377 fail: 5
Failed tests:
	ppc64:mac99:ppc64_book3s_defconfig:smp:initrd
	ppc64:mac99:ppc64_book3s_defconfig:smp:ide:rootfs
	ppc64:mac99:ppc64_book3s_defconfig:smp:sdhci:mmc:rootfs
	ppc64:mac99:ppc64_book3s_defconfig:smp:nvme:rootfs
	ppc64:mac99:ppc64_book3s_defconfig:smp:scsi[DC395]:rootfs

Build failures see below. Note that the failures are different than the
failures observed in the v4.4.y release candidate, meaning that some
additional errors may not be reported.

Tested-by: Guenter Roeck <linux@xxxxxxxxxxxx>

Guenter

---
Building powerpc:cell_defconfig ... failed
--------------
Error log:
In file included from arch/powerpc/include/asm/kup.h:10:0,
                 from arch/powerpc/include/asm/uaccess.h:12,
                 from arch/powerpc/lib/checksum_wrappers.c:24:
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: error: data definition has no type or storage class [-Werror]
 DECLARE_STATIC_KEY_FALSE(uaccess_flush_key);
 ^~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: error: type defaults to ‘int’ in declaration of ‘DECLARE_STATIC_KEY_FALSE’ [-Werror=implicit-int]
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: error: parameter names (without types) in function declaration [-Werror]
arch/powerpc/include/asm/book3s/64/kup-radix.h: In function ‘prevent_user_access’:
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:6: error: implicit declaration of function ‘static_branch_unlikely’ [-Werror=implicit-function-declaration]
  if (static_branch_unlikely(&uaccess_flush_key))
      ^~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:30: error: ‘uaccess_flush_key’ undeclared (first use in this function); did you mean ‘do_uaccess_flush’?
  if (static_branch_unlikely(&uaccess_flush_key))
                              ^~~~~~~~~~~~~~~~~
                              do_uaccess_flush
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:30: note: each undeclared identifier is reported only once for each function it appears in
cc1: all warnings being treated as errors
make[2]: *** [arch/powerpc/lib/checksum_wrappers.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[2]: *** wait: No child processes.  Stop.
make[1]: *** [arch/powerpc/lib] Error 2
make[1]: *** Waiting for unfinished jobs....
In file included from arch/powerpc/include/asm/kup.h:10:0,
                 from arch/powerpc/include/asm/uaccess.h:12,
                 from arch/powerpc/platforms/cell/spufs/syscalls.c:8:
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: error: data definition has no type or storage class [-Werror]
 DECLARE_STATIC_KEY_FALSE(uaccess_flush_key);
 ^~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: error: type defaults to ‘int’ in declaration of ‘DECLARE_STATIC_KEY_FALSE’ [-Werror=implicit-int]
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: error: parameter names (without types) in function declaration [-Werror]
arch/powerpc/include/asm/book3s/64/kup-radix.h: In function ‘prevent_user_access’:
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:6: error: implicit declaration of function ‘static_branch_unlikely’ [-Werror=implicit-function-declaration]
  if (static_branch_unlikely(&uaccess_flush_key))
      ^~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:30: error: ‘uaccess_flush_key’ undeclared (first use in this function); did you mean ‘do_uaccess_flush’?
  if (static_branch_unlikely(&uaccess_flush_key))
                              ^~~~~~~~~~~~~~~~~
                              do_uaccess_flush
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:30: note: each undeclared identifier is reported only once for each function it appears in
cc1: all warnings being treated as errors
make[4]: *** [arch/powerpc/platforms/cell/spufs/syscalls.o] Error 1
make[4]: *** Waiting for unfinished jobs....
In file included from arch/powerpc/include/asm/kup.h:10:0,
                 from arch/powerpc/include/asm/uaccess.h:12,
                 from include/linux/uaccess.h:8,
                 from include/linux/crypto.h:26,
                 from crypto/cipher.c:17:
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: warning: data definition has no type or storage class
 DECLARE_STATIC_KEY_FALSE(uaccess_flush_key);
 ^~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: error: type defaults to ‘int’ in declaration of ‘DECLARE_STATIC_KEY_FALSE’ [-Werror=implicit-int]
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: warning: parameter names (without types) in function declaration
arch/powerpc/include/asm/book3s/64/kup-radix.h: In function ‘prevent_user_access’:
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:6: error: implicit declaration of function ‘static_branch_unlikely’ [-Werror=implicit-function-declaration]
  if (static_branch_unlikely(&uaccess_flush_key))
      ^~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:30: error: ‘uaccess_flush_key’ undeclared (first use in this function); did you mean ‘do_uaccess_flush’?
  if (static_branch_unlikely(&uaccess_flush_key))
                              ^~~~~~~~~~~~~~~~~
                              do_uaccess_flush
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:30: note: each undeclared identifier is reported only once for each function it appears in
In file included from arch/powerpc/include/asm/kup.h:10:0,
                 from arch/powerpc/include/asm/uaccess.h:12,
                 from include/linux/uaccess.h:8,
                 from include/linux/crypto.h:26,
                 from crypto/compress.c:15:
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: warning: data definition has no type or storage class
 DECLARE_STATIC_KEY_FALSE(uaccess_flush_key);
 ^~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: error: type defaults to ‘int’ in declaration of ‘DECLARE_STATIC_KEY_FALSE’ [-Werror=implicit-int]
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: warning: parameter names (without types) in function declaration
cc1: some warnings being treated as errors
make[2]: *** [crypto/cipher.o] Error 1
make[2]: *** Waiting for unfinished jobs....
arch/powerpc/include/asm/book3s/64/kup-radix.h: In function ‘prevent_user_access’:
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:6: error: implicit declaration of function ‘static_branch_unlikely’ [-Werror=implicit-function-declaration]
  if (static_branch_unlikely(&uaccess_flush_key))
      ^~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:30: error: ‘uaccess_flush_key’ undeclared (first use in this function); did you mean ‘do_uaccess_flush’?
  if (static_branch_unlikely(&uaccess_flush_key))
                              ^~~~~~~~~~~~~~~~~
                              do_uaccess_flush
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:30: note: each undeclared identifier is reported only once for each function it appears in
In file included from arch/powerpc/include/asm/kup.h:10:0,
                 from arch/powerpc/include/asm/uaccess.h:12,
                 from include/asm-generic/termios-base.h:7,
                 from arch/powerpc/include/asm/termios.h:20,
                 from include/uapi/linux/termios.h:5,
                 from include/linux/tty.h:6,
                 from kernel/signal.c:18:
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: warning: data definition has no type or storage class
 DECLARE_STATIC_KEY_FALSE(uaccess_flush_key);
 ^~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: error: type defaults to ‘int’ in declaration of ‘DECLARE_STATIC_KEY_FALSE’ [-Werror=implicit-int]
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: warning: parameter names (without types) in function declaration
arch/powerpc/include/asm/book3s/64/kup-radix.h: In function ‘prevent_user_access’:
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:6: error: implicit declaration of function ‘static_branch_unlikely’ [-Werror=implicit-function-declaration]
  if (static_branch_unlikely(&uaccess_flush_key))
      ^~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:30: error: ‘uaccess_flush_key’ undeclared (first use in this function); did you mean ‘do_uaccess_flush’?
  if (static_branch_unlikely(&uaccess_flush_key))
                              ^~~~~~~~~~~~~~~~~
                              do_uaccess_flush
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:30: note: each undeclared identifier is reported only once for each function it appears in
In file included from arch/powerpc/include/asm/kup.h:10:0,
                 from arch/powerpc/include/asm/uaccess.h:12,
                 from include/linux/uaccess.h:8,
                 from include/linux/crypto.h:26,
                 from include/crypto/algapi.h:15,
                 from crypto/memneq.c:62:
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: warning: data definition has no type or storage class
 DECLARE_STATIC_KEY_FALSE(uaccess_flush_key);
 ^~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: error: type defaults to ‘int’ in declaration of ‘DECLARE_STATIC_KEY_FALSE’ [-Werror=implicit-int]
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: warning: parameter names (without types) in function declaration
arch/powerpc/include/asm/book3s/64/kup-radix.h: In function ‘prevent_user_access’:
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:6: error: implicit declaration of function ‘static_branch_unlikely’ [-Werror=implicit-function-declaration]
  if (static_branch_unlikely(&uaccess_flush_key))
      ^~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:30: error: ‘uaccess_flush_key’ undeclared (first use in this function); did you mean ‘do_uaccess_flush’?
  if (static_branch_unlikely(&uaccess_flush_key))
                              ^~~~~~~~~~~~~~~~~
                              do_uaccess_flush
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:30: note: each undeclared identifier is reported only once for each function it appears in
cc1: some warnings being treated as errors

Building powerpc:maple_defconfig ... failed
--------------
Error log:
In file included from arch/powerpc/include/asm/kup.h:10:0,
                 from arch/powerpc/include/asm/uaccess.h:12,
                 from arch/powerpc/lib/checksum_wrappers.c:24:
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: error: data definition has no type or storage class [-Werror]
 DECLARE_STATIC_KEY_FALSE(uaccess_flush_key);
 ^~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: error: type defaults to ‘int’ in declaration of ‘DECLARE_STATIC_KEY_FALSE’ [-Werror=implicit-int]
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: error: parameter names (without types) in function declaration [-Werror]
arch/powerpc/include/asm/book3s/64/kup-radix.h: In function ‘prevent_user_access’:
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:6: error: implicit declaration of function ‘static_branch_unlikely’ [-Werror=implicit-function-declaration]
  if (static_branch_unlikely(&uaccess_flush_key))
      ^~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:30: error: ‘uaccess_flush_key’ undeclared (first use in this function); did you mean ‘do_uaccess_flush’?
  if (static_branch_unlikely(&uaccess_flush_key))
                              ^~~~~~~~~~~~~~~~~
                              do_uaccess_flush
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:30: note: each undeclared identifier is reported only once for each function it appears in
cc1: all warnings being treated as errors
make[2]: *** [arch/powerpc/lib/checksum_wrappers.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [arch/powerpc/lib] Error 2
make[1]: *** Waiting for unfinished jobs....
In file included from arch/powerpc/include/asm/kup.h:10:0,
                 from arch/powerpc/include/asm/uaccess.h:12,
                 from include/linux/uaccess.h:8,
                 from include/linux/crypto.h:26,
                 from crypto/cipher.c:17:
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: warning: data definition has no type or storage class
 DECLARE_STATIC_KEY_FALSE(uaccess_flush_key);
 ^~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: error: type defaults to ‘int’ in declaration of ‘DECLARE_STATIC_KEY_FALSE’ [-Werror=implicit-int]
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: warning: parameter names (without types) in function declaration
arch/powerpc/include/asm/book3s/64/kup-radix.h: In function ‘prevent_user_access’:
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:6: error: implicit declaration of function ‘static_branch_unlikely’ [-Werror=implicit-function-declaration]
  if (static_branch_unlikely(&uaccess_flush_key))
      ^~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:30: error: ‘uaccess_flush_key’ undeclared (first use in this function); did you mean ‘do_uaccess_flush’?
  if (static_branch_unlikely(&uaccess_flush_key))
                              ^~~~~~~~~~~~~~~~~
                              do_uaccess_flush
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:30: note: each undeclared identifier is reported only once for each function it appears in
cc1: some warnings being treated as errors
make[2]: *** [crypto/cipher.o] Error 1
make[2]: *** Waiting for unfinished jobs....
In file included from arch/powerpc/include/asm/kup.h:10:0,
                 from arch/powerpc/include/asm/uaccess.h:12,
                 from include/linux/uaccess.h:8,
                 from include/linux/crypto.h:26,
                 from crypto/compress.c:15:
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: warning: data definition has no type or storage class
 DECLARE_STATIC_KEY_FALSE(uaccess_flush_key);
 ^~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: error: type defaults to ‘int’ in declaration of ‘DECLARE_STATIC_KEY_FALSE’ [-Werror=implicit-int]
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: warning: parameter names (without types) in function declaration
arch/powerpc/include/asm/book3s/64/kup-radix.h: In function ‘prevent_user_access’:
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:6: error: implicit declaration of function ‘static_branch_unlikely’ [-Werror=implicit-function-declaration]
  if (static_branch_unlikely(&uaccess_flush_key))
      ^~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:30: error: ‘uaccess_flush_key’ undeclared (first use in this function); did you mean ‘do_uaccess_flush’?
  if (static_branch_unlikely(&uaccess_flush_key))
                              ^~~~~~~~~~~~~~~~~
                              do_uaccess_flush
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:30: note: each undeclared identifier is reported only once for each function it appears in
cc1: some warnings being treated as errors
make[2]: *** [crypto/compress.o] Error 1
In file included from arch/powerpc/include/asm/kup.h:10:0,
                 from arch/powerpc/include/asm/uaccess.h:12,
                 from include/linux/uaccess.h:8,
                 from include/linux/crypto.h:26,
                 from include/crypto/algapi.h:15,
                 from crypto/memneq.c:62:
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: warning: data definition has no type or storage class
 DECLARE_STATIC_KEY_FALSE(uaccess_flush_key);
 ^~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: error: type defaults to ‘int’ in declaration of ‘DECLARE_STATIC_KEY_FALSE’ [-Werror=implicit-int]
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: warning: parameter names (without types) in function declaration
arch/powerpc/include/asm/book3s/64/kup-radix.h: In function ‘prevent_user_access’:
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:6: error: implicit declaration of function ‘static_branch_unlikely’ [-Werror=implicit-function-declaration]
  if (static_branch_unlikely(&uaccess_flush_key))
      ^~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:30: error: ‘uaccess_flush_key’ undeclared (first use in this function); did you mean ‘do_uaccess_flush’?
  if (static_branch_unlikely(&uaccess_flush_key))
                              ^~~~~~~~~~~~~~~~~
                              do_uaccess_flush
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:30: note: each undeclared identifier is reported only once for each function it appears in
cc1: some warnings being treated as errors
make[2]: *** [crypto/memneq.o] Error 1
make[1]: *** [crypto] Error 2
In file included from arch/powerpc/include/asm/kup.h:10:0,
                 from arch/powerpc/include/asm/uaccess.h:12,
                 from include/asm-generic/termios-base.h:7,
                 from arch/powerpc/include/asm/termios.h:20,
                 from include/uapi/linux/termios.h:5,
                 from include/linux/tty.h:6,
                 from kernel/signal.c:18:
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: warning: data definition has no type or storage class
 DECLARE_STATIC_KEY_FALSE(uaccess_flush_key);
 ^~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: error: type defaults to ‘int’ in declaration of ‘DECLARE_STATIC_KEY_FALSE’ [-Werror=implicit-int]
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: warning: parameter names (without types) in function declaration
arch/powerpc/include/asm/book3s/64/kup-radix.h: In function ‘prevent_user_access’:
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:6: error: implicit declaration of function ‘static_branch_unlikely’ [-Werror=implicit-function-declaration]
  if (static_branch_unlikely(&uaccess_flush_key))
      ^~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:30: error: ‘uaccess_flush_key’ undeclared (first use in this function); did you mean ‘do_uaccess_flush’?
  if (static_branch_unlikely(&uaccess_flush_key))
                              ^~~~~~~~~~~~~~~~~
                              do_uaccess_flush
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:30: note: each undeclared identifier is reported only once for each function it appears in
In file included from arch/powerpc/include/asm/kup.h:10:0,
                 from arch/powerpc/include/asm/uaccess.h:12,
                 from include/asm-generic/termios-base.h:7,
                 from arch/powerpc/include/asm/termios.h:20,
                 from include/uapi/linux/termios.h:5,
                 from include/linux/tty.h:6,
                 from arch/powerpc/kernel/setup_64.c:27:
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: error: data definition has no type or storage class [-Werror]
 DECLARE_STATIC_KEY_FALSE(uaccess_flush_key);
 ^~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: error: type defaults to ‘int’ in declaration of ‘DECLARE_STATIC_KEY_FALSE’ [-Werror=implicit-int]
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: error: parameter names (without types) in function declaration [-Werror]
arch/powerpc/include/asm/book3s/64/kup-radix.h: In function ‘prevent_user_access’:
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:6: error: implicit declaration of function ‘static_branch_unlikely’ [-Werror=implicit-function-declaration]
  if (static_branch_unlikely(&uaccess_flush_key))
      ^~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:30: error: ‘uaccess_flush_key’ undeclared (first use in this function); did you mean ‘do_uaccess_flush’?
  if (static_branch_unlikely(&uaccess_flush_key))
                              ^~~~~~~~~~~~~~~~~
                              do_uaccess_flush
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:30: note: each undeclared identifier is reported only once for each function it appears in
cc1: some warnings being treated as errors
make[2]: *** [kernel/signal.o] Error 1
make[2]: *** Waiting for unfinished jobs....
cc1: all warnings being treated as errors
make[2]: *** [arch/powerpc/kernel/setup_64.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [arch/powerpc/kernel] Error 2
In file included from arch/powerpc/include/asm/kup.h:10:0,
                 from arch/powerpc/include/asm/uaccess.h:12,
                 from include/linux/poll.h:11,
                 from fs/bad_inode.c:16:
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: warning: data definition has no type or storage class
 DECLARE_STATIC_KEY_FALSE(uaccess_flush_key);
 ^~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: error: type defaults to ‘int’ in declaration of ‘DECLARE_STATIC_KEY_FALSE’ [-Werror=implicit-int]
arch/powerpc/include/asm/book3s/64/kup-radix.h:5:1: warning: parameter names (without types) in function declaration
arch/powerpc/include/asm/book3s/64/kup-radix.h: In function ‘prevent_user_access’:
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:6: error: implicit declaration of function ‘static_branch_unlikely’ [-Werror=implicit-function-declaration]
  if (static_branch_unlikely(&uaccess_flush_key))
      ^~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:30: error: ‘uaccess_flush_key’ undeclared (first use in this function); did you mean ‘do_uaccess_flush’?
  if (static_branch_unlikely(&uaccess_flush_key))
                              ^~~~~~~~~~~~~~~~~
                              do_uaccess_flush
arch/powerpc/include/asm/book3s/64/kup-radix.h:18:30: note: each undeclared identifier is reported only once for each function it appears in
cc1: some warnings being treated as errors