arch/arm64/include/asm/cpufeature.h:273:2: warning: initialized field overwritten

From: kernel test robot
Date: Tue Feb 02 2021 - 18:21:45 EST

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Hi Marc,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 3aaf0a27ffc29b19a62314edd684b9bc6346f9a8
commit: ed888cb0d1ebce69f12794e89fbd5e2c86d40b8d arm64: Allow CPUs unffected by ARM erratum 1418040 to come in late
date: 5 months ago
config: arm64-randconfig-r026-20210202 (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ed888cb0d1ebce69f12794e89fbd5e2c86d40b8d
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout ed888cb0d1ebce69f12794e89fbd5e2c86d40b8d
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

arch/arm64/kernel/cpu_errata.c:295:13: warning: no previous prototype for 'arm64_update_smccc_conduit' [-Wmissing-prototypes]
295 | void __init arm64_update_smccc_conduit(struct alt_instr *alt,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/kernel/cpu_errata.c:317:13: warning: no previous prototype for 'arm64_enable_wa2_handling' [-Wmissing-prototypes]
317 | void __init arm64_enable_wa2_handling(struct alt_instr *alt,
| ^~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/kernel/cpu_errata.c:486:13: warning: initialized field overwritten [-Woverride-init]
486 | .matches = is_affected_midr_range, \
| ^~~~~~~~~~~~~~~~~~~~~~
arch/arm64/kernel/cpu_errata.c:498:2: note: in expansion of macro 'CAP_MIDR_RANGE'
498 | CAP_MIDR_RANGE(model, v_min, r_min, v_max, r_max)
| ^~~~~~~~~~~~~~
arch/arm64/kernel/cpu_errata.c:506:2: note: in expansion of macro 'ERRATA_MIDR_RANGE'
506 | ERRATA_MIDR_RANGE(m, var, r_min, var, r_max)
| ^~~~~~~~~~~~~~~~~
arch/arm64/kernel/cpu_errata.c:747:3: note: in expansion of macro 'ERRATA_MIDR_REV_RANGE'
747 | ERRATA_MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 4),
| ^~~~~~~~~~~~~~~~~~~~~
arch/arm64/kernel/cpu_errata.c:486:13: note: (near initialization for 'erratum_843419_list[0].matches')
486 | .matches = is_affected_midr_range, \
| ^~~~~~~~~~~~~~~~~~~~~~
arch/arm64/kernel/cpu_errata.c:498:2: note: in expansion of macro 'CAP_MIDR_RANGE'
498 | CAP_MIDR_RANGE(model, v_min, r_min, v_max, r_max)
| ^~~~~~~~~~~~~~
arch/arm64/kernel/cpu_errata.c:506:2: note: in expansion of macro 'ERRATA_MIDR_RANGE'
506 | ERRATA_MIDR_RANGE(m, var, r_min, var, r_max)
| ^~~~~~~~~~~~~~~~~
arch/arm64/kernel/cpu_errata.c:747:3: note: in expansion of macro 'ERRATA_MIDR_REV_RANGE'
747 | ERRATA_MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 4),
| ^~~~~~~~~~~~~~~~~~~~~
arch/arm64/kernel/cpu_errata.c:486:13: warning: initialized field overwritten [-Woverride-init]
486 | .matches = is_affected_midr_range, \
| ^~~~~~~~~~~~~~~~~~~~~~
arch/arm64/kernel/cpu_errata.c:498:2: note: in expansion of macro 'CAP_MIDR_RANGE'
498 | CAP_MIDR_RANGE(model, v_min, r_min, v_max, r_max)
| ^~~~~~~~~~~~~~
arch/arm64/kernel/cpu_errata.c:510:2: note: in expansion of macro 'ERRATA_MIDR_RANGE'
510 | ERRATA_MIDR_RANGE(model, var, rev, var, rev)
| ^~~~~~~~~~~~~~~~~
arch/arm64/kernel/cpu_errata.c:753:3: note: in expansion of macro 'ERRATA_MIDR_REV'
753 | ERRATA_MIDR_REV(MIDR_BRAHMA_B53, 0, 0),
| ^~~~~~~~~~~~~~~
arch/arm64/kernel/cpu_errata.c:486:13: note: (near initialization for 'erratum_843419_list[1].matches')
486 | .matches = is_affected_midr_range, \
| ^~~~~~~~~~~~~~~~~~~~~~
arch/arm64/kernel/cpu_errata.c:498:2: note: in expansion of macro 'CAP_MIDR_RANGE'
498 | CAP_MIDR_RANGE(model, v_min, r_min, v_max, r_max)
| ^~~~~~~~~~~~~~
arch/arm64/kernel/cpu_errata.c:510:2: note: in expansion of macro 'ERRATA_MIDR_RANGE'
510 | ERRATA_MIDR_RANGE(model, var, rev, var, rev)
| ^~~~~~~~~~~~~~~~~
arch/arm64/kernel/cpu_errata.c:753:3: note: in expansion of macro 'ERRATA_MIDR_REV'
753 | ERRATA_MIDR_REV(MIDR_BRAHMA_B53, 0, 0),
| ^~~~~~~~~~~~~~~
In file included from arch/arm64/include/asm/ptrace.h:11,
from arch/arm64/include/asm/irqflags.h:10,
from include/linux/irqflags.h:16,
from include/linux/rcupdate.h:26,
from include/linux/rculist.h:11,
from include/linux/pid.h:5,
from include/linux/sched.h:14,
from include/linux/ratelimit.h:6,
from include/linux/dev_printk.h:16,
from include/linux/device.h:15,
from include/linux/node.h:18,
from include/linux/cpu.h:17,
from arch/arm64/kernel/cpu_errata.c:10:
>> arch/arm64/include/asm/cpufeature.h:273:2: warning: initialized field overwritten [-Woverride-init]
273 | (ARM64_CPUCAP_SCOPE_LOCAL_CPU | \
| ^
arch/arm64/kernel/cpu_errata.c:918:11: note: in expansion of macro 'ARM64_CPUCAP_WEAK_LOCAL_CPU_FEATURE'
918 | .type = ARM64_CPUCAP_WEAK_LOCAL_CPU_FEATURE,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/include/asm/cpufeature.h:273:2: note: (near initialization for 'arm64_errata[10].type')
273 | (ARM64_CPUCAP_SCOPE_LOCAL_CPU | \
| ^
arch/arm64/kernel/cpu_errata.c:918:11: note: in expansion of macro 'ARM64_CPUCAP_WEAK_LOCAL_CPU_FEATURE'
918 | .type = ARM64_CPUCAP_WEAK_LOCAL_CPU_FEATURE,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/kernel/cpu_errata.c:942:14: warning: initialized field overwritten [-Woverride-init]
942 | .matches = needs_tx2_tvm_workaround,
| ^~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/kernel/cpu_errata.c:942:14: note: (near initialization for 'arm64_errata[13].matches')

vim +273 arch/arm64/include/asm/cpufeature.h

5b4747c5dce7a8 Suzuki K Poulose 2018-03-26 249
5b4747c5dce7a8 Suzuki K Poulose 2018-03-26 250 /*
5b4747c5dce7a8 Suzuki K Poulose 2018-03-26 251 * CPU errata workarounds that need to be enabled at boot time if one or
5b4747c5dce7a8 Suzuki K Poulose 2018-03-26 252 * more CPUs in the system requires it. When one of these capabilities
5b4747c5dce7a8 Suzuki K Poulose 2018-03-26 253 * has been enabled, it is safe to allow any CPU to boot that doesn't
5b4747c5dce7a8 Suzuki K Poulose 2018-03-26 254 * require the workaround. However, it is not safe if a "late" CPU
5b4747c5dce7a8 Suzuki K Poulose 2018-03-26 255 * requires a workaround and the system hasn't enabled it already.
5b4747c5dce7a8 Suzuki K Poulose 2018-03-26 256 */
5b4747c5dce7a8 Suzuki K Poulose 2018-03-26 257 #define ARM64_CPUCAP_LOCAL_CPU_ERRATUM \
5b4747c5dce7a8 Suzuki K Poulose 2018-03-26 258 (ARM64_CPUCAP_SCOPE_LOCAL_CPU | ARM64_CPUCAP_OPTIONAL_FOR_LATE_CPU)
5b4747c5dce7a8 Suzuki K Poulose 2018-03-26 259 /*
5b4747c5dce7a8 Suzuki K Poulose 2018-03-26 260 * CPU feature detected at boot time based on system-wide value of a
5b4747c5dce7a8 Suzuki K Poulose 2018-03-26 261 * feature. It is safe for a late CPU to have this feature even though
ca7f686ac9fe87 Will Deacon 2018-06-15 262 * the system hasn't enabled it, although the feature will not be used
5b4747c5dce7a8 Suzuki K Poulose 2018-03-26 263 * by Linux in this case. If the system has enabled this feature already,
5b4747c5dce7a8 Suzuki K Poulose 2018-03-26 264 * then every late CPU must have it.
5b4747c5dce7a8 Suzuki K Poulose 2018-03-26 265 */
5b4747c5dce7a8 Suzuki K Poulose 2018-03-26 266 #define ARM64_CPUCAP_SYSTEM_FEATURE \
5b4747c5dce7a8 Suzuki K Poulose 2018-03-26 267 (ARM64_CPUCAP_SCOPE_SYSTEM | ARM64_CPUCAP_PERMITTED_FOR_LATE_CPU)
5c137714dd8cae Suzuki K Poulose 2018-03-26 268 /*
5c137714dd8cae Suzuki K Poulose 2018-03-26 269 * CPU feature detected at boot time based on feature of one or more CPUs.
5c137714dd8cae Suzuki K Poulose 2018-03-26 270 * All possible conflicts for a late CPU are ignored.
5c137714dd8cae Suzuki K Poulose 2018-03-26 271 */
5c137714dd8cae Suzuki K Poulose 2018-03-26 272 #define ARM64_CPUCAP_WEAK_LOCAL_CPU_FEATURE \
5c137714dd8cae Suzuki K Poulose 2018-03-26 @273 (ARM64_CPUCAP_SCOPE_LOCAL_CPU | \
5c137714dd8cae Suzuki K Poulose 2018-03-26 274 ARM64_CPUCAP_OPTIONAL_FOR_LATE_CPU | \
5c137714dd8cae Suzuki K Poulose 2018-03-26 275 ARM64_CPUCAP_PERMITTED_FOR_LATE_CPU)
5b4747c5dce7a8 Suzuki K Poulose 2018-03-26 276

:::::: The code at line 273 was first introduced by commit
:::::: 5c137714dd8cae464dbd5f028c07af149e6d09fc arm64: capabilities: Introduce weak features based on local CPU

:::::: TO: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
:::::: CC: Will Deacon <will.deacon@xxxxxxx>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

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Next message: Michael Matz: "Re: Alternative compilers to GCC/Clang"
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