[PATCH] arm64: errata: avoid duplicate field initializer

[PATCH] arm64: errata: avoid duplicate field initializer

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

The '.type' field is initialized both in place and in the macro
as reported by this W=1 warning:

arch/arm64/include/asm/cpufeature.h:281:9: error: initialized field overwritten [-Werror=override-init]
  281 |         (ARM64_CPUCAP_SCOPE_LOCAL_CPU | ARM64_CPUCAP_OPTIONAL_FOR_LATE_CPU)
      |         ^
arch/arm64/kernel/cpu_errata.c:136:17: note: in expansion of macro 'ARM64_CPUCAP_LOCAL_CPU_ERRATUM'
  136 |         .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,                         \
      |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/kernel/cpu_errata.c:145:9: note: in expansion of macro 'ERRATA_MIDR_RANGE'
  145 |         ERRATA_MIDR_RANGE(m, var, r_min, var, r_max)
      |         ^~~~~~~~~~~~~~~~~
arch/arm64/kernel/cpu_errata.c:613:17: note: in expansion of macro 'ERRATA_MIDR_REV_RANGE'
  613 |                 ERRATA_MIDR_REV_RANGE(MIDR_CORTEX_A510, 0, 0, 2),
      |                 ^~~~~~~~~~~~~~~~~~~~~
arch/arm64/include/asm/cpufeature.h:281:9: note: (near initialization for 'arm64_errata[18].type')
  281 |         (ARM64_CPUCAP_SCOPE_LOCAL_CPU | ARM64_CPUCAP_OPTIONAL_FOR_LATE_CPU)
      |         ^

Remove the extranous initializer.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/arm64/kernel/cpu_errata.c | 1 -
 1 file changed, 1 deletion(-)

I see this warning on 5.17-rc8, but did not test it on linux-next,
which may already have a fix.

diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c
index a337760f4423..ee7fbd13d030 100644
--- a/arch/arm64/kernel/cpu_errata.c
+++ b/arch/arm64/kernel/cpu_errata.c
@@ -609,7 +609,6 @@ const struct arm64_cpu_capabilities arm64_errata[] = {
 	{
 		.desc = "ARM erratum 2077057",
 		.capability = ARM64_WORKAROUND_2077057,
-		.type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
 		ERRATA_MIDR_REV_RANGE(MIDR_CORTEX_A510, 0, 0, 2),
 	},
 #endif
-- 
2.29.2


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Re: [PATCH] arm64: errata: avoid duplicate field initializer

[Catalin Marinas]

On Wed, 16 Mar 2022 19:37:45 +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> 
> The '.type' field is initialized both in place and in the macro
> as reported by this W=1 warning:
> 
> arch/arm64/include/asm/cpufeature.h:281:9: error: initialized field overwritten [-Werror=override-init]
>   281 |         (ARM64_CPUCAP_SCOPE_LOCAL_CPU | ARM64_CPUCAP_OPTIONAL_FOR_LATE_CPU)
>       |         ^
> arch/arm64/kernel/cpu_errata.c:136:17: note: in expansion of macro 'ARM64_CPUCAP_LOCAL_CPU_ERRATUM'
>   136 |         .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,                         \
>       |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> arch/arm64/kernel/cpu_errata.c:145:9: note: in expansion of macro 'ERRATA_MIDR_RANGE'
>   145 |         ERRATA_MIDR_RANGE(m, var, r_min, var, r_max)
>       |         ^~~~~~~~~~~~~~~~~
> arch/arm64/kernel/cpu_errata.c:613:17: note: in expansion of macro 'ERRATA_MIDR_REV_RANGE'
>   613 |                 ERRATA_MIDR_REV_RANGE(MIDR_CORTEX_A510, 0, 0, 2),
>       |                 ^~~~~~~~~~~~~~~~~~~~~
> arch/arm64/include/asm/cpufeature.h:281:9: note: (near initialization for 'arm64_errata[18].type')
>   281 |         (ARM64_CPUCAP_SCOPE_LOCAL_CPU | ARM64_CPUCAP_OPTIONAL_FOR_LATE_CPU)
>       |         ^
> 
> [...]

Applied to arm64 (for-next/fixes), thanks!

[1/1] arm64: errata: avoid duplicate field initializer
      https://git.kernel.org/arm64/c/316e46f65a54

-- 
Catalin


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