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[PW_SID:1095312] Disable -Wattribute-alias for clang-23 and newer#1946

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[PW_SID:1095312] Disable -Wattribute-alias for clang-23 and newer#1946
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@linux-riscv-bot linux-riscv-bot commented May 15, 2026

PR for series 1095312 applied to workflow__riscv__fixes

Name: Disable -Wattribute-alias for clang-23 and newer
URL: https://patchwork.kernel.org/project/linux-riscv/list/?series=1095312
Version: 1

@nathanchance
Disable -Wattribute-alias for clang-23 and newer
8e2dee2 
Clang recently added support for -Wattribute-alias [1], which results in
the same warnings that necessitated commit bee2003 ("disable
-Wattribute-alias warning for SYSCALL_DEFINEx()") for GCC.

  kernel/time/itimer.c:325:1: error: alias and aliasee have different types 'long (unsigned int)' and 'long (typeof (__builtin_choose_expr((__builtin_types_compatible_p(typeof ((unsigned int)0), typeof (0LL)) || __builtin_types_compatible_p(typeof ((unsigned int)0), typeof (0ULL))), 0LL, 0L)))' (aka 'long (long)') [-Werror,-Wattribute-alias]
    325 | SYSCALL_DEFINE1(alarm, unsigned int, seconds)
        | ^
  include/linux/syscalls.h:225:36: note: expanded from macro 'SYSCALL_DEFINE1'
    225 | #define SYSCALL_DEFINE1(name, ...) SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
        |                                    ^
  include/linux/syscalls.h:236:2: note: expanded from macro 'SYSCALL_DEFINEx'
    236 |         __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
        |         ^
  include/linux/syscalls.h:251:18: note: expanded from macro '__SYSCALL_DEFINEx'
    251 |                 __attribute__((alias(__stringify(__se_sys##name))));    \
        |                                ^
  kernel/time/itimer.c:325:1: note: aliasee is declared here
  include/linux/syscalls.h:225:36: note: expanded from macro 'SYSCALL_DEFINE1'
    225 | #define SYSCALL_DEFINE1(name, ...) SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
        |                                    ^
  include/linux/syscalls.h:236:2: note: expanded from macro 'SYSCALL_DEFINEx'
    236 |         __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
        |         ^
  include/linux/syscalls.h:255:18: note: expanded from macro '__SYSCALL_DEFINEx'
    255 |         asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__))  \
        |                         ^
  <scratch space>:16:1: note: expanded from here
     16 | __se_sys_alarm
        | ^

Disable the warnings in the same way for clang-23 and newer.

Cc: stable@vger.kernel.org
Closes: ClangBuiltLinux#2163
Link: llvm/llvm-project@40da692 [1]
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Linux RISC-V bot <linux.riscv.bot@gmail.com>
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linux-riscv-bot commented May 15, 2026

Patch 1: "Disable -Wattribute-alias for clang-23 and newer"
build-rv32-defconfig
Desc: Builds riscv32 defconfig
Duration: 141.16 seconds
Result: PASS

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linux-riscv-bot commented May 15, 2026

Patch 1: "Disable -Wattribute-alias for clang-23 and newer"
build-rv64-clang-allmodconfig
Desc: Builds riscv64 allmodconfig with Clang, and checks for errors and added warnings
Duration: 2207.33 seconds
Result: PASS

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linux-riscv-bot commented May 15, 2026

Patch 1: "Disable -Wattribute-alias for clang-23 and newer"
build-rv64-gcc-allmodconfig
Desc: Builds riscv64 allmodconfig with GCC, and checks for errors and added warnings
Duration: 2996.53 seconds
Result: PASS

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linux-riscv-bot commented May 15, 2026

Patch 1: "Disable -Wattribute-alias for clang-23 and newer"
build-rv64-nommu-k210-defconfig
Desc: Builds riscv64 defconfig with NOMMU for K210
Duration: 25.68 seconds
Result: PASS

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linux-riscv-bot commented May 15, 2026

Patch 1: "Disable -Wattribute-alias for clang-23 and newer"
build-rv64-nommu-k210-virt
Desc: Builds riscv64 defconfig with NOMMU for the virt platform
Duration: 26.93 seconds
Result: PASS

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linux-riscv-bot commented May 15, 2026

Patch 1: "Disable -Wattribute-alias for clang-23 and newer"
checkpatch
Desc: Runs checkpatch.pl on the patch
Duration: 2.56 seconds
Result: WARNING
Output:

WARNING: The commit message has 'stable@', perhaps it also needs a 'Fixes:' tag?

total: 0 errors, 1 warnings, 0 checks, 36 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

Commit 8e2dee2fd93c ("Disable -Wattribute-alias for clang-23 and newer") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT CAMELCASE COMMIT_LOG_LONG_LINE GIT_COMMIT_ID MACRO_ARG_REUSE NO_AUTHOR_SIGN_OFF

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.
total: 0 errors, 1 warnings, 0 checks, 36 lines checked
WARNING: The commit message has 'stable@', perhaps it also needs a 'Fixes:' tag?

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linux-riscv-bot commented May 15, 2026

Patch 1: "Disable -Wattribute-alias for clang-23 and newer"
dtb-warn-rv64
Desc: Checks for Device Tree warnings/errors
Duration: 87.58 seconds
Result: PASS

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linux-riscv-bot commented May 15, 2026

Patch 1: "Disable -Wattribute-alias for clang-23 and newer"
header-inline
Desc: Detects static functions without inline keyword in header files
Duration: 0.26 seconds
Result: PASS

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linux-riscv-bot commented May 15, 2026

Patch 1: "Disable -Wattribute-alias for clang-23 and newer"
kdoc
Desc: Detects for kdoc errors
Duration: 0.93 seconds
Result: PASS

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linux-riscv-bot commented May 15, 2026

Patch 1: "Disable -Wattribute-alias for clang-23 and newer"
module-param
Desc: Detect module_param changes
Duration: 0.28 seconds
Result: PASS

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linux-riscv-bot commented May 15, 2026

Patch 1: "Disable -Wattribute-alias for clang-23 and newer"
verify-fixes
Desc: Verifies that the Fixes: tags exist
Duration: 0.24 seconds
Result: PASS

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linux-riscv-bot commented May 15, 2026

Patch 1: "Disable -Wattribute-alias for clang-23 and newer"
verify-signedoff
Desc: Verifies that Signed-off-by: tags are correct
Duration: 0.32 seconds
Result: PASS

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