Subject: linux-next: build failure after merge of the mm tree

From: Stephen Rothwell <[email-masked]>
Date: Tue, 18 Jul 2023 10:02:57 +1000

Hi all,

After merging the mm tree, today's linux-next build (arm
multi_v7_defconfig) failed like this:

In file included from include/linux/arm-smccc.h:8,
                 from arch/arm/mm/proc-v7-bugs.c:2:
arch/arm/mm/proc-v7-bugs.c: In function 'spectre_v2_get_cpu_fw_mitigation_state':
include/linux/arm-smccc.h:485:29: error: '__declare_arg_3' undeclared (first use in this function)
  485 |                 CONCATENATE(__declare_arg_, COUNT_ARGS(__VA_ARGS__));   \
      |                             ^~~~~~~~~~~~~~
include/linux/args.h:25:24: note: in definition of macro '__CONCAT'
   25 | #define __CONCAT(a, b) a ## b
      |                        ^
include/linux/arm-smccc.h:485:17: note: in expansion of macro 'CONCATENATE'
  485 |                 CONCATENATE(__declare_arg_, COUNT_ARGS(__VA_ARGS__));   \
      |                 ^~~~~~~~~~~
include/linux/arm-smccc.h:526:33: note: in expansion of macro '__arm_smccc_1_1'
  526 | #define arm_smccc_1_1_hvc(...)  __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__)
      |                                 ^~~~~~~~~~~~~~~
include/linux/arm-smccc.h:563:25: note: in expansion of macro 'arm_smccc_1_1_hvc'
  563 |                         arm_smccc_1_1_hvc(__VA_ARGS__);                 \
      |                         ^~~~~~~~~~~~~~~~~
arch/arm/mm/proc-v7-bugs.c:17:9: note: in expansion of macro 'arm_smccc_1_1_invoke'
   17 |         arm_smccc_1_1_invoke(ARM_SMCCC_ARCH_FEATURES_FUNC_ID,
      |         ^~~~~~~~~~~~~~~~~~~~
include/linux/arm-smccc.h:485:29: note: each undeclared identifier is reported only once for each function it appears in
  485 |                 CONCATENATE(__declare_arg_, COUNT_ARGS(__VA_ARGS__));   \
      |                             ^~~~~~~~~~~~~~
include/linux/args.h:25:24: note: in definition of macro '__CONCAT'
   25 | #define __CONCAT(a, b) a ## b
      |                        ^
include/linux/arm-smccc.h:485:17: note: in expansion of macro 'CONCATENATE'
  485 |                 CONCATENATE(__declare_arg_, COUNT_ARGS(__VA_ARGS__));   \
      |                 ^~~~~~~~~~~
include/linux/arm-smccc.h:526:33: note: in expansion of macro '__arm_smccc_1_1'
  526 | #define arm_smccc_1_1_hvc(...)  __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__)
      |                                 ^~~~~~~~~~~~~~~
include/linux/arm-smccc.h:563:25: note: in expansion of macro 'arm_smccc_1_1_hvc'
  563 |                         arm_smccc_1_1_hvc(__VA_ARGS__);                 \
      |                         ^~~~~~~~~~~~~~~~~
arch/arm/mm/proc-v7-bugs.c:17:9: note: in expansion of macro 'arm_smccc_1_1_invoke'
   17 |         arm_smccc_1_1_invoke(ARM_SMCCC_ARCH_FEATURES_FUNC_ID,
      |         ^~~~~~~~~~~~~~~~~~~~
include/linux/arm-smccc.h:417:38: error: 'arg0' undeclared (first use in this function); did you mean 'r0'?
  417 | #define __constraint_read_0     "r" (arg0)
      |                                      ^~~~
include/linux/arm-smccc.h:418:33: note: in expansion of macro '__constraint_read_0'
  418 | #define __constraint_read_1     __constraint_read_0, "r" (arg1)
      |                                 ^~~~~~~~~~~~~~~~~~~
include/linux/arm-smccc.h:419:33: note: in expansion of macro '__constraint_read_1'
  419 | #define __constraint_read_2     __constraint_read_1, "r" (arg2)
      |                                 ^~~~~~~~~~~~~~~~~~~
include/linux/arm-smccc.h:420:33: note: in expansion of macro '__constraint_read_2'
  420 | #define __constraint_read_3     __constraint_read_2, "r" (arg3)
      |                                 ^~~~~~~~~~~~~~~~~~~
include/linux/args.h:25:24: note: in expansion of macro '__constraint_read_3'
   25 | #define __CONCAT(a, b) a ## b
      |                        ^
include/linux/args.h:26:27: note: in expansion of macro '__CONCAT'
   26 | #define CONCATENATE(a, b) __CONCAT(a, b)
      |                           ^~~~~~~~
include/linux/arm-smccc.h:489:32: note: in expansion of macro 'CONCATENATE'
  489 |                              : CONCATENATE(__constraint_read_,          \
      |                                ^~~~~~~~~~~
include/linux/arm-smccc.h:526:33: note: in expansion of macro '__arm_smccc_1_1'
  526 | #define arm_smccc_1_1_hvc(...)  __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__)
      |                                 ^~~~~~~~~~~~~~~
include/linux/arm-smccc.h:563:25: note: in expansion of macro 'arm_smccc_1_1_hvc'
  563 |                         arm_smccc_1_1_hvc(__VA_ARGS__);                 \
      |                         ^~~~~~~~~~~~~~~~~
arch/arm/mm/proc-v7-bugs.c:17:9: note: in expansion of macro 'arm_smccc_1_1_invoke'
   17 |         arm_smccc_1_1_invoke(ARM_SMCCC_ARCH_FEATURES_FUNC_ID,
      |         ^~~~~~~~~~~~~~~~~~~~
include/linux/arm-smccc.h:418:59: error: 'arg1' undeclared (first use in this function); did you mean 'r1'?
  418 | #define __constraint_read_1     __constraint_read_0, "r" (arg1)
      |                                                           ^~~~
include/linux/arm-smccc.h:419:33: note: in expansion of macro '__constraint_read_1'
  419 | #define __constraint_read_2     __constraint_read_1, "r" (arg2)
      |                                 ^~~~~~~~~~~~~~~~~~~
include/linux/arm-smccc.h:420:33: note: in expansion of macro '__constraint_read_2'
  420 | #define __constraint_read_3     __constraint_read_2, "r" (arg3)
      |                                 ^~~~~~~~~~~~~~~~~~~
include/linux/args.h:25:24: note: in expansion of macro '__constraint_read_3'
   25 | #define __CONCAT(a, b) a ## b
      |                        ^
include/linux/args.h:26:27: note: in expansion of macro '__CONCAT'
   26 | #define CONCATENATE(a, b) __CONCAT(a, b)
      |                           ^~~~~~~~
include/linux/arm-smccc.h:489:32: note: in expansion of macro 'CONCATENATE'
  489 |                              : CONCATENATE(__constraint_read_,          \
      |                                ^~~~~~~~~~~
include/linux/arm-smccc.h:526:33: note: in expansion of macro '__arm_smccc_1_1'
  526 | #define arm_smccc_1_1_hvc(...)  __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__)
      |                                 ^~~~~~~~~~~~~~~
include/linux/arm-smccc.h:563:25: note: in expansion of macro 'arm_smccc_1_1_hvc'
  563 |                         arm_smccc_1_1_hvc(__VA_ARGS__);                 \
      |                         ^~~~~~~~~~~~~~~~~
arch/arm/mm/proc-v7-bugs.c:17:9: note: in expansion of macro 'arm_smccc_1_1_invoke'
   17 |         arm_smccc_1_1_invoke(ARM_SMCCC_ARCH_FEATURES_FUNC_ID,
      |         ^~~~~~~~~~~~~~~~~~~~
include/linux/arm-smccc.h:419:59: error: 'arg2' undeclared (first use in this function); did you mean 'r2'?
  419 | #define __constraint_read_2     __constraint_read_1, "r" (arg2)
      |                                                           ^~~~
include/linux/arm-smccc.h:420:33: note: in expansion of macro '__constraint_read_2'
  420 | #define __constraint_read_3     __constraint_read_2, "r" (arg3)
      |                                 ^~~~~~~~~~~~~~~~~~~
include/linux/args.h:25:24: note: in expansion of macro '__constraint_read_3'
   25 | #define __CONCAT(a, b) a ## b
      |                        ^
include/linux/args.h:26:27: note: in expansion of macro '__CONCAT'
   26 | #define CONCATENATE(a, b) __CONCAT(a, b)
      |                           ^~~~~~~~
include/linux/arm-smccc.h:489:32: note: in expansion of macro 'CONCATENATE'
  489 |                              : CONCATENATE(__constraint_read_,          \
      |                                ^~~~~~~~~~~
include/linux/arm-smccc.h:526:33: note: in expansion of macro '__arm_smccc_1_1'
  526 | #define arm_smccc_1_1_hvc(...)  __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__)
      |                                 ^~~~~~~~~~~~~~~
include/linux/arm-smccc.h:563:25: note: in expansion of macro 'arm_smccc_1_1_hvc'
  563 |                         arm_smccc_1_1_hvc(__VA_ARGS__);                 \
      |                         ^~~~~~~~~~~~~~~~~
arch/arm/mm/proc-v7-bugs.c:17:9: note: in expansion of macro 'arm_smccc_1_1_invoke'
   17 |         arm_smccc_1_1_invoke(ARM_SMCCC_ARCH_FEATURES_FUNC_ID,
      |         ^~~~~~~~~~~~~~~~~~~~
include/linux/arm-smccc.h:420:59: error: 'arg3' undeclared (first use in this function); did you mean 'r3'?
  420 | #define __constraint_read_3     __constraint_read_2, "r" (arg3)
      |                                                           ^~~~
include/linux/args.h:25:24: note: in expansion of macro '__constraint_read_3'
   25 | #define __CONCAT(a, b) a ## b
      |                        ^
include/linux/args.h:26:27: note: in expansion of macro '__CONCAT'
   26 | #define CONCATENATE(a, b) __CONCAT(a, b)
      |                           ^~~~~~~~
include/linux/arm-smccc.h:489:32: note: in expansion of macro 'CONCATENATE'
  489 |                              : CONCATENATE(__constraint_read_,          \
      |                                ^~~~~~~~~~~
include/linux/arm-smccc.h:526:33: note: in expansion of macro '__arm_smccc_1_1'
  526 | #define arm_smccc_1_1_hvc(...)  __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__)
      |                                 ^~~~~~~~~~~~~~~
include/linux/arm-smccc.h:563:25: note: in expansion of macro 'arm_smccc_1_1_hvc'
  563 |                         arm_smccc_1_1_hvc(__VA_ARGS__);                 \
      |                         ^~~~~~~~~~~~~~~~~
arch/arm/mm/proc-v7-bugs.c:17:9: note: in expansion of macro 'arm_smccc_1_1_invoke'
   17 |         arm_smccc_1_1_invoke(ARM_SMCCC_ARCH_FEATURES_FUNC_ID,
      |         ^~~~~~~~~~~~~~~~~~~~
include/linux/arm-smccc.h:492:21: error: '___res' undeclared (first use in this function)
  492 |                 if (___res)                                             \
      |                     ^~~~~~
include/linux/arm-smccc.h:526:33: note: in expansion of macro '__arm_smccc_1_1'
  526 | #define arm_smccc_1_1_hvc(...)  __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__)
      |                                 ^~~~~~~~~~~~~~~
include/linux/arm-smccc.h:563:25: note: in expansion of macro 'arm_smccc_1_1_hvc'
  563 |                         arm_smccc_1_1_hvc(__VA_ARGS__);                 \
      |                         ^~~~~~~~~~~~~~~~~
arch/arm/mm/proc-v7-bugs.c:17:9: note: in expansion of macro 'arm_smccc_1_1_invoke'
   17 |         arm_smccc_1_1_invoke(ARM_SMCCC_ARCH_FEATURES_FUNC_ID,
      |         ^~~~~~~~~~~~~~~~~~~~
arch/arm/mm/proc-v7-bugs.c: In function 'call_smc_arch_workaround_1':
include/linux/arm-smccc.h:485:29: error: '__declare_arg_2' undeclared (first use in this function)
  485 |                 CONCATENATE(__declare_arg_, COUNT_ARGS(__VA_ARGS__));   \
      |                             ^~~~~~~~~~~~~~
include/linux/args.h:25:24: note: in definition of macro '__CONCAT'
   25 | #define __CONCAT(a, b) a ## b
      |                        ^
include/linux/arm-smccc.h:485:17: note: in expansion of macro 'CONCATENATE'
  485 |                 CONCATENATE(__declare_arg_, COUNT_ARGS(__VA_ARGS__));   \
      |                 ^~~~~~~~~~~
include/linux/arm-smccc.h:510:33: note: in expansion of macro '__arm_smccc_1_1'
  510 | #define arm_smccc_1_1_smc(...)  __arm_smccc_1_1(SMCCC_SMC_INST, __VA_ARGS__)
      |                                 ^~~~~~~~~~~~~~~
arch/arm/mm/proc-v7-bugs.c:58:9: note: in expansion of macro 'arm_smccc_1_1_smc'
   58 |         arm_smccc_1_1_smc(ARM_SMCCC_ARCH_WORKAROUND_1, NULL);
      |         ^~~~~~~~~~~~~~~~~
include/linux/arm-smccc.h:417:38: error: 'arg0' undeclared (first use in this function); did you mean 'r0'?
  417 | #define __constraint_read_0     "r" (arg0)
      |                                      ^~~~
include/linux/arm-smccc.h:418:33: note: in expansion of macro '__constraint_read_0'
  418 | #define __constraint_read_1     __constraint_read_0, "r" (arg1)
      |                                 ^~~~~~~~~~~~~~~~~~~
include/linux/arm-smccc.h:419:33: note: in expansion of macro '__constraint_read_1'
  419 | #define __constraint_read_2     __constraint_read_1, "r" (arg2)
      |                                 ^~~~~~~~~~~~~~~~~~~
include/linux/args.h:25:24: note: in expansion of macro '__constraint_read_2'
   25 | #define __CONCAT(a, b) a ## b
      |                        ^
include/linux/args.h:26:27: note: in expansion of macro '__CONCAT'
   26 | #define CONCATENATE(a, b) __CONCAT(a, b)
      |                           ^~~~~~~~
include/linux/arm-smccc.h:489:32: note: in expansion of macro 'CONCATENATE'
  489 |                              : CONCATENATE(__constraint_read_,          \
      |                                ^~~~~~~~~~~
include/linux/arm-smccc.h:510:33: note: in expansion of macro '__arm_smccc_1_1'
  510 | #define arm_smccc_1_1_smc(...)  __arm_smccc_1_1(SMCCC_SMC_INST, __VA_ARGS__)
      |                                 ^~~~~~~~~~~~~~~
arch/arm/mm/proc-v7-bugs.c:58:9: note: in expansion of macro 'arm_smccc_1_1_smc'
   58 |         arm_smccc_1_1_smc(ARM_SMCCC_ARCH_WORKAROUND_1, NULL);
      |         ^~~~~~~~~~~~~~~~~
include/linux/arm-smccc.h:418:59: error: 'arg1' undeclared (first use in this function); did you mean 'r1'?
  418 | #define __constraint_read_1     __constraint_read_0, "r" (arg1)
      |                                                           ^~~~
include/linux/arm-smccc.h:419:33: note: in expansion of macro '__constraint_read_1'
  419 | #define __constraint_read_2     __constraint_read_1, "r" (arg2)
      |                                 ^~~~~~~~~~~~~~~~~~~
include/linux/args.h:25:24: note: in expansion of macro '__constraint_read_2'
   25 | #define __CONCAT(a, b) a ## b
      |                        ^
include/linux/args.h:26:27: note: in expansion of macro '__CONCAT'
   26 | #define CONCATENATE(a, b) __CONCAT(a, b)
      |                           ^~~~~~~~
include/linux/arm-smccc.h:489:32: note: in expansion of macro 'CONCATENATE'
  489 |                              : CONCATENATE(__constraint_read_,          \
      |                                ^~~~~~~~~~~
include/linux/arm-smccc.h:510:33: note: in expansion of macro '__arm_smccc_1_1'
  510 | #define arm_smccc_1_1_smc(...)  __arm_smccc_1_1(SMCCC_SMC_INST, __VA_ARGS__)
      |                                 ^~~~~~~~~~~~~~~
arch/arm/mm/proc-v7-bugs.c:58:9: note: in expansion of macro 'arm_smccc_1_1_smc'
   58 |         arm_smccc_1_1_smc(ARM_SMCCC_ARCH_WORKAROUND_1, NULL);
      |         ^~~~~~~~~~~~~~~~~
include/linux/arm-smccc.h:419:59: error: 'arg2' undeclared (first use in this function); did you mean 'r2'?
  419 | #define __constraint_read_2     __constraint_read_1, "r" (arg2)
      |                                                           ^~~~
include/linux/args.h:25:24: note: in expansion of macro '__constraint_read_2'
   25 | #define __CONCAT(a, b) a ## b
      |                        ^
include/linux/args.h:26:27: note: in expansion of macro '__CONCAT'
   26 | #define CONCATENATE(a, b) __CONCAT(a, b)
      |                           ^~~~~~~~
include/linux/arm-smccc.h:489:32: note: in expansion of macro 'CONCATENATE'
  489 |                              : CONCATENATE(__constraint_read_,          \
      |                                ^~~~~~~~~~~
include/linux/arm-smccc.h:510:33: note: in expansion of macro '__arm_smccc_1_1'
  510 | #define arm_smccc_1_1_smc(...)  __arm_smccc_1_1(SMCCC_SMC_INST, __VA_ARGS__)
      |                                 ^~~~~~~~~~~~~~~
arch/arm/mm/proc-v7-bugs.c:58:9: note: in expansion of macro 'arm_smccc_1_1_smc'
   58 |         arm_smccc_1_1_smc(ARM_SMCCC_ARCH_WORKAROUND_1, NULL);
      |         ^~~~~~~~~~~~~~~~~
include/linux/arm-smccc.h:492:21: error: '___res' undeclared (first use in this function)
  492 |                 if (___res)                                             \
      |                     ^~~~~~
include/linux/arm-smccc.h:510:33: note: in expansion of macro '__arm_smccc_1_1'
  510 | #define arm_smccc_1_1_smc(...)  __arm_smccc_1_1(SMCCC_SMC_INST, __VA_ARGS__)
      |                                 ^~~~~~~~~~~~~~~
arch/arm/mm/proc-v7-bugs.c:58:9: note: in expansion of macro 'arm_smccc_1_1_smc'
   58 |         arm_smccc_1_1_smc(ARM_SMCCC_ARCH_WORKAROUND_1, NULL);
      |         ^~~~~~~~~~~~~~~~~
arch/arm/mm/proc-v7-bugs.c: In function 'call_hvc_arch_workaround_1':
include/linux/arm-smccc.h:485:29: error: '__declare_arg_2' undeclared (first use in this function)
  485 |                 CONCATENATE(__declare_arg_, COUNT_ARGS(__VA_ARGS__));   \
      |                             ^~~~~~~~~~~~~~
include/linux/args.h:25:24: note: in definition of macro '__CONCAT'
   25 | #define __CONCAT(a, b) a ## b
      |                        ^
include/linux/arm-smccc.h:485:17: note: in expansion of macro 'CONCATENATE'
  485 |                 CONCATENATE(__declare_arg_, COUNT_ARGS(__VA_ARGS__));   \
      |                 ^~~~~~~~~~~
include/linux/arm-smccc.h:526:33: note: in expansion of macro '__arm_smccc_1_1'
  526 | #define arm_smccc_1_1_hvc(...)  __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__)
      |                                 ^~~~~~~~~~~~~~~
arch/arm/mm/proc-v7-bugs.c:63:9: note: in expansion of macro 'arm_smccc_1_1_hvc'
   63 |         arm_smccc_1_1_hvc(ARM_SMCCC_ARCH_WORKAROUND_1, NULL);
      |         ^~~~~~~~~~~~~~~~~
include/linux/arm-smccc.h:417:38: error: 'arg0' undeclared (first use in this function); did you mean 'r0'?
  417 | #define __constraint_read_0     "r" (arg0)
      |                                      ^~~~
include/linux/arm-smccc.h:418:33: note: in expansion of macro '__constraint_read_0'
  418 | #define __constraint_read_1     __constraint_read_0, "r" (arg1)
      |                                 ^~~~~~~~~~~~~~~~~~~
include/linux/arm-smccc.h:419:33: note: in expansion of macro '__constraint_read_1'
  419 | #define __constraint_read_2     __constraint_read_1, "r" (arg2)
      |                                 ^~~~~~~~~~~~~~~~~~~
include/linux/args.h:25:24: note: in expansion of macro '__constraint_read_2'
   25 | #define __CONCAT(a, b) a ## b
      |                        ^
include/linux/args.h:26:27: note: in expansion of macro '__CONCAT'
   26 | #define CONCATENATE(a, b) __CONCAT(a, b)
      |                           ^~~~~~~~
include/linux/arm-smccc.h:489:32: note: in expansion of macro 'CONCATENATE'
  489 |                              : CONCATENATE(__constraint_read_,          \
      |                                ^~~~~~~~~~~
include/linux/arm-smccc.h:526:33: note: in expansion of macro '__arm_smccc_1_1'
  526 | #define arm_smccc_1_1_hvc(...)  __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__)
      |                                 ^~~~~~~~~~~~~~~
arch/arm/mm/proc-v7-bugs.c:63:9: note: in expansion of macro 'arm_smccc_1_1_hvc'
   63 |         arm_smccc_1_1_hvc(ARM_SMCCC_ARCH_WORKAROUND_1, NULL);
      |         ^~~~~~~~~~~~~~~~~
include/linux/arm-smccc.h:418:59: error: 'arg1' undeclared (first use in this function); did you mean 'r1'?
  418 | #define __constraint_read_1     __constraint_read_0, "r" (arg1)
      |                                                           ^~~~
include/linux/arm-smccc.h:419:33: note: in expansion of macro '__constraint_read_1'
  419 | #define __constraint_read_2     __constraint_read_1, "r" (arg2)
      |                                 ^~~~~~~~~~~~~~~~~~~
include/linux/args.h:25:24: note: in expansion of macro '__constraint_read_2'
   25 | #define __CONCAT(a, b) a ## b
      |                        ^
include/linux/args.h:26:27: note: in expansion of macro '__CONCAT'
   26 | #define CONCATENATE(a, b) __CONCAT(a, b)
      |                           ^~~~~~~~
include/linux/arm-smccc.h:489:32: note: in expansion of macro 'CONCATENATE'
  489 |                              : CONCATENATE(__constraint_read_,          \
      |                                ^~~~~~~~~~~
include/linux/arm-smccc.h:526:33: note: in expansion of macro '__arm_smccc_1_1'
  526 | #define arm_smccc_1_1_hvc(...)  __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__)
      |                                 ^~~~~~~~~~~~~~~
arch/arm/mm/proc-v7-bugs.c:63:9: note: in expansion of macro 'arm_smccc_1_1_hvc'
   63 |         arm_smccc_1_1_hvc(ARM_SMCCC_ARCH_WORKAROUND_1, NULL);
      |         ^~~~~~~~~~~~~~~~~
include/linux/arm-smccc.h:419:59: error: 'arg2' undeclared (first use in this function); did you mean 'r2'?
  419 | #define __constraint_read_2     __constraint_read_1, "r" (arg2)
      |                                                           ^~~~
include/linux/args.h:25:24: note: in expansion of macro '__constraint_read_2'
   25 | #define __CONCAT(a, b) a ## b
      |                        ^
include/linux/args.h:26:27: note: in expansion of macro '__CONCAT'
   26 | #define CONCATENATE(a, b) __CONCAT(a, b)
      |                           ^~~~~~~~
include/linux/arm-smccc.h:489:32: note: in expansion of macro 'CONCATENATE'
  489 |                              : CONCATENATE(__constraint_read_,          \
      |                                ^~~~~~~~~~~
include/linux/arm-smccc.h:526:33: note: in expansion of macro '__arm_smccc_1_1'
  526 | #define arm_smccc_1_1_hvc(...)  __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__)
      |                                 ^~~~~~~~~~~~~~~
arch/arm/mm/proc-v7-bugs.c:63:9: note: in expansion of macro 'arm_smccc_1_1_hvc'
   63 |         arm_smccc_1_1_hvc(ARM_SMCCC_ARCH_WORKAROUND_1, NULL);
      |         ^~~~~~~~~~~~~~~~~
include/linux/arm-smccc.h:492:21: error: '___res' undeclared (first use in this function)
  492 |                 if (___res)                                             \
      |                     ^~~~~~
include/linux/arm-smccc.h:526:33: note: in expansion of macro '__arm_smccc_1_1'
  526 | #define arm_smccc_1_1_hvc(...)  __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__)
      |                                 ^~~~~~~~~~~~~~~
arch/arm/mm/proc-v7-bugs.c:63:9: note: in expansion of macro 'arm_smccc_1_1_hvc'
   63 |         arm_smccc_1_1_hvc(ARM_SMCCC_ARCH_WORKAROUND_1, NULL);
      |         ^~~~~~~~~~~~~~~~~
make[5]: *** [scripts/Makefile.build:243: arch/arm/mm/proc-v7-bugs.o] Error 1
make[4]: *** [scripts/Makefile.build:477: arch/arm/mm] Error 2
make[3]: *** [scripts/Makefile.build:477: arch/arm] Error 2
make[3]: *** Waiting for unfinished jobs....
In file included from include/linux/arm-smccc.h:8,
                 from drivers/char/hw_random/arm_smccc_trng.c:20:
drivers/char/hw_random/arm_smccc_trng.c: In function 'smccc_trng_read':
include/linux/arm-smccc.h:485:29: error: '__declare_arg_3' undeclared (first use in this function)
  485 |                 CONCATENATE(__declare_arg_, COUNT_ARGS(__VA_ARGS__));   \
      |                             ^~~~~~~~~~~~~~
include/linux/args.h:25:24: note: in definition of macro '__CONCAT'
   25 | #define __CONCAT(a, b) a ## b
      |                        ^
include/linux/arm-smccc.h:485:17: note: in expansion of macro 'CONCATENATE'
  485 |                 CONCATENATE(__declare_arg_, COUNT_ARGS(__VA_ARGS__));   \
      |                 ^~~~~~~~~~~
include/linux/arm-smccc.h:526:33: note: in expansion of macro '__arm_smccc_1_1'
  526 | #define arm_smccc_1_1_hvc(...)  __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__)
      |                                 ^~~~~~~~~~~~~~~
include/linux/arm-smccc.h:563:25: note: in expansion of macro 'arm_smccc_1_1_hvc'
  563 |                         arm_smccc_1_1_hvc(__VA_ARGS__);                 \
      |                         ^~~~~~~~~~~~~~~~~
drivers/char/hw_random/arm_smccc_trng.c:73:17: note: in expansion of macro 'arm_smccc_1_1_invoke'
   73 |                 arm_smccc_1_1_invoke(ARM_SMCCC_TRNG_RND, bits, &res);
      |                 ^~~~~~~~~~~~~~~~~~~~
include/linux/arm-smccc.h:485:29: note: each undeclared identifier is reported only once for each function it appears in
  485 |                 CONCATENATE(__declare_arg_, COUNT_ARGS(__VA_ARGS__));   \
      |                             ^~~~~~~~~~~~~~
include/linux/args.h:25:24: note: in definition of macro '__CONCAT'
   25 | #define __CONCAT(a, b) a ## b
      |                        ^
include/linux/arm-smccc.h:485:17: note: in expansion of macro 'CONCATENATE'
  485 |                 CONCATENATE(__declare_arg_, COUNT_ARGS(__VA_ARGS__));   \
      |                 ^~~~~~~~~~~
include/linux/arm-smccc.h:526:33: note: in expansion of macro '__arm_smccc_1_1'
  526 | #define arm_smccc_1_1_hvc(...)  __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__)
      |                                 ^~~~~~~~~~~~~~~
include/linux/arm-smccc.h:563:25: note: in expansion of macro 'arm_smccc_1_1_hvc'
  563 |                         arm_smccc_1_1_hvc(__VA_ARGS__);                 \
      |                         ^~~~~~~~~~~~~~~~~
drivers/char/hw_random/arm_smccc_trng.c:73:17: note: in expansion of macro 'arm_smccc_1_1_invoke'
   73 |                 arm_smccc_1_1_invoke(ARM_SMCCC_TRNG_RND, bits, &res);
      |                 ^~~~~~~~~~~~~~~~~~~~
include/linux/arm-smccc.h:417:38: error: 'arg0' undeclared (first use in this function); did you mean 'r0'?
  417 | #define __constraint_read_0     "r" (arg0)
      |                                      ^~~~
include/linux/arm-smccc.h:418:33: note: in expansion of macro '__constraint_read_0'
  418 | #define __constraint_read_1     __constraint_read_0, "r" (arg1)
      |                                 ^~~~~~~~~~~~~~~~~~~
include/linux/arm-smccc.h:419:33: note: in expansion of macro '__constraint_read_1'
  419 | #define __constraint_read_2     __constraint_read_1, "r" (arg2)
      |                                 ^~~~~~~~~~~~~~~~~~~
include/linux/arm-smccc.h:420:33: note: in expansion of macro '__constraint_read_2'
  420 | #define __constraint_read_3     __constraint_read_2, "r" (arg3)
      |                                 ^~~~~~~~~~~~~~~~~~~
include/linux/args.h:25:24: note: in expansion of macro '__constraint_read_3'
   25 | #define __CONCAT(a, b) a ## b
      |                        ^
include/linux/args.h:26:27: note: in expansion of macro '__CONCAT'
   26 | #define CONCATENATE(a, b) __CONCAT(a, b)
      |                           ^~~~~~~~
include/linux/arm-smccc.h:489:32: note: in expansion of macro 'CONCATENATE'
  489 |                              : CONCATENATE(__constraint_read_,          \
      |                                ^~~~~~~~~~~
include/linux/arm-smccc.h:526:33: note: in expansion of macro '__arm_smccc_1_1'
  526 | #define arm_smccc_1_1_hvc(...)  __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__)
      |                                 ^~~~~~~~~~~~~~~
include/linux/arm-smccc.h:563:25: note: in expansion of macro 'arm_smccc_1_1_hvc'
  563 |                         arm_smccc_1_1_hvc(__VA_ARGS__);                 \
      |                         ^~~~~~~~~~~~~~~~~
drivers/char/hw_random/arm_smccc_trng.c:73:17: note: in expansion of macro 'arm_smccc_1_1_invoke'
   73 |                 arm_smccc_1_1_invoke(ARM_SMCCC_TRNG_RND, bits, &res);
      |                 ^~~~~~~~~~~~~~~~~~~~
include/linux/arm-smccc.h:418:59: error: 'arg1' undeclared (first use in this function); did you mean 'r1'?
  418 | #define __constraint_read_1     __constraint_read_0, "r" (arg1)
      |                                                           ^~~~
include/linux/arm-smccc.h:419:33: note: in expansion of macro '__constraint_read_1'
  419 | #define __constraint_read_2     __constraint_read_1, "r" (arg2)
      |                                 ^~~~~~~~~~~~~~~~~~~
include/linux/arm-smccc.h:420:33: note: in expansion of macro '__constraint_read_2'
  420 | #define __constraint_read_3     __constraint_read_2, "r" (arg3)
      |                                 ^~~~~~~~~~~~~~~~~~~
include/linux/args.h:25:24: note: in expansion of macro '__constraint_read_3'
   25 | #define __CONCAT(a, b) a ## b
      |                        ^
include/linux/args.h:26:27: note: in expansion of macro '__CONCAT'
   26 | #define CONCATENATE(a, b) __CONCAT(a, b)
      |                           ^~~~~~~~
include/linux/arm-smccc.h:489:32: note: in expansion of macro 'CONCATENATE'
  489 |                              : CONCATENATE(__constraint_read_,          \
      |                                ^~~~~~~~~~~
include/linux/arm-smccc.h:526:33: note: in expansion of macro '__arm_smccc_1_1'
  526 | #define arm_smccc_1_1_hvc(...)  __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__)
      |                                 ^~~~~~~~~~~~~~~
include/linux/arm-smccc.h:563:25: note: in expansion of macro 'arm_smccc_1_1_hvc'
  563 |                         arm_smccc_1_1_hvc(__VA_ARGS__);                 \
      |                         ^~~~~~~~~~~~~~~~~
drivers/char/hw_random/arm_smccc_trng.c:73:17: note: in expansion of macro 'arm_smccc_1_1_invoke'
   73 |                 arm_smccc_1_1_invoke(ARM_SMCCC_TRNG_RND, bits, &res);
      |                 ^~~~~~~~~~~~~~~~~~~~
include/linux/arm-smccc.h:419:59: error: 'arg2' undeclared (first use in this function); did you mean 'r2'?
  419 | #define __constraint_read_2     __constraint_read_1, "r" (arg2)
      |                                                           ^~~~
include/linux/arm-smccc.h:420:33: note: in expansion of macro '__constraint_read_2'
  420 | #define __constraint_read_3     __constraint_read_2, "r" (arg3)
      |                                 ^~~~~~~~~~~~~~~~~~~
include/linux/args.h:25:24: note: in expansion of macro '__constraint_read_3'
   25 | #define __CONCAT(a, b) a ## b
      |                        ^
include/linux/args.h:26:27: note: in expansion of macro '__CONCAT'
   26 | #define CONCATENATE(a, b) __CONCAT(a, b)
      |                           ^~~~~~~~
include/linux/arm-smccc.h:489:32: note: in expansion of macro 'CONCATENATE'
  489 |                              : CONCATENATE(__constraint_read_,          \
      |                                ^~~~~~~~~~~
include/linux/arm-smccc.h:526:33: note: in expansion of macro '__arm_smccc_1_1'
  526 | #define arm_smccc_1_1_hvc(...)  __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__)
      |                                 ^~~~~~~~~~~~~~~
include/linux/arm-smccc.h:563:25: note: in expansion of macro 'arm_smccc_1_1_hvc'
  563 |                         arm_smccc_1_1_hvc(__VA_ARGS__);                 \
      |                         ^~~~~~~~~~~~~~~~~
drivers/char/hw_random/arm_smccc_trng.c:73:17: note: in expansion of macro 'arm_smccc_1_1_invoke'
   73 |                 arm_smccc_1_1_invoke(ARM_SMCCC_TRNG_RND, bits, &res);
      |                 ^~~~~~~~~~~~~~~~~~~~
include/linux/arm-smccc.h:420:59: error: 'arg3' undeclared (first use in this function); did you mean 'r3'?
  420 | #define __constraint_read_3     __constraint_read_2, "r" (arg3)
      |                                                           ^~~~
include/linux/args.h:25:24: note: in expansion of macro '__constraint_read_3'
   25 | #define __CONCAT(a, b) a ## b
      |                        ^
include/linux/args.h:26:27: note: in expansion of macro '__CONCAT'
   26 | #define CONCATENATE(a, b) __CONCAT(a, b)
      |                           ^~~~~~~~
include/linux/arm-smccc.h:489:32: note: in expansion of macro 'CONCATENATE'
  489 |                              : CONCATENATE(__constraint_read_,          \
      |                                ^~~~~~~~~~~
include/linux/arm-smccc.h:526:33: note: in expansion of macro '__arm_smccc_1_1'
  526 | #define arm_smccc_1_1_hvc(...)  __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__)
      |                                 ^~~~~~~~~~~~~~~
include/linux/arm-smccc.h:563:25: note: in expansion of macro 'arm_smccc_1_1_hvc'
  563 |                         arm_smccc_1_1_hvc(__VA_ARGS__);                 \
      |                         ^~~~~~~~~~~~~~~~~
drivers/char/hw_random/arm_smccc_trng.c:73:17: note: in expansion of macro 'arm_smccc_1_1_invoke'
   73 |                 arm_smccc_1_1_invoke(ARM_SMCCC_TRNG_RND, bits, &res);
      |                 ^~~~~~~~~~~~~~~~~~~~
include/linux/arm-smccc.h:492:21: error: '___res' undeclared (first use in this function)
  492 |                 if (___res)                                             \
      |                     ^~~~~~
include/linux/arm-smccc.h:526:33: note: in expansion of macro '__arm_smccc_1_1'
  526 | #define arm_smccc_1_1_hvc(...)  __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__)
      |                                 ^~~~~~~~~~~~~~~
include/linux/arm-smccc.h:563:25: note: in expansion of macro 'arm_smccc_1_1_hvc'
  563 |                         arm_smccc_1_1_hvc(__VA_ARGS__);                 \
      |                         ^~~~~~~~~~~~~~~~~
drivers/char/hw_random/arm_smccc_trng.c:73:17: note: in expansion of macro 'arm_smccc_1_1_invoke'
   73 |                 arm_smccc_1_1_invoke(ARM_SMCCC_TRNG_RND, bits, &res);
      |                 ^~~~~~~~~~~~~~~~~~~~

Presumably caused by commits

  93e9856955f8 ("kernel.h: split out COUNT_ARGS() and CONCATENATE() to args.h")
  fceebffabbb6 ("arm64: smccc: replace custom COUNT_ARGS() & CONCATENATE() implementations")

I have used the mm tree from next-20230717 for today.

-- 
Cheers,
Stephen Rothwell