[PW_SID:1070415] [v1,1/2] perf build: Remove libunwind support by linux-riscv-bot · Pull Request #1655 · linux-riscv/linux

linux-riscv-bot · 2026-03-21T23:54:00Z

PR for series 1070415 applied to workflow

Name: [v1,1/2] perf build: Remove libunwind support
URL: https://patchwork.kernel.org/project/linux-riscv/list/?series=1070415
Version: 1

libunwind support is deprecated and libdw is preferred for DWARF unwinding. Remove the libunwind configuration from Makefile.config, and delete the associated source files and architecture-specific support code. Update the DWARF post-unwind logic to rely solely on libdw. Clean up the HAVE_LIBUNWIND_SUPPORT and CONFIG_LIBUNWIND references across the codebase, including the unwind_libunwind_ops structure. Signed-off-by: Ian Rogers <irogers@google.com> Signed-off-by: Linux RISC-V bot <linux.riscv.bot@gmail.com>

Libunwind support has been removed from perf, so the feature tests used to detect its presence are no longer needed. Remove the test-libunwind-*.c files and their references in the feature Makefile. Signed-off-by: Ian Rogers <irogers@google.com> Signed-off-by: Linux RISC-V bot <linux.riscv.bot@gmail.com>

linux-riscv-bot · 2026-03-21T23:59:58Z

Patch 1: "[v1,1/2] perf build: Remove libunwind support"
build-rv32-defconfig
Desc: Builds riscv32 defconfig
Duration: 138.01 seconds
Result: PASS

linux-riscv-bot · 2026-03-22T00:16:48Z

Patch 1: "[v1,1/2] perf build: Remove libunwind support"
build-rv64-clang-allmodconfig
Desc: Builds riscv64 allmodconfig with Clang, and checks for errors and added warnings
Duration: 1008.36 seconds
Result: PASS

linux-riscv-bot · 2026-03-22T00:39:42Z

Patch 1: "[v1,1/2] perf build: Remove libunwind support"
build-rv64-gcc-allmodconfig
Desc: Builds riscv64 allmodconfig with GCC, and checks for errors and added warnings
Duration: 1372.66 seconds
Result: PASS

linux-riscv-bot · 2026-03-22T00:40:09Z

Patch 1: "[v1,1/2] perf build: Remove libunwind support"
build-rv64-nommu-k210-defconfig
Desc: Builds riscv64 defconfig with NOMMU for K210
Duration: 26.32 seconds
Result: PASS

linux-riscv-bot · 2026-03-22T00:40:38Z

Patch 1: "[v1,1/2] perf build: Remove libunwind support"
build-rv64-nommu-k210-virt
Desc: Builds riscv64 defconfig with NOMMU for the virt platform
Duration: 27.20 seconds
Result: PASS

linux-riscv-bot · 2026-03-22T00:40:46Z

Patch 1: "[v1,1/2] perf build: Remove libunwind support"
checkpatch
Desc: Runs checkpatch.pl on the patch
Duration: 6.88 seconds
Result: WARNING
Output:

WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
#347: 
deleted file mode 100644

total: 0 errors, 1 warnings, 0 checks, 552 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 664ae5142b76 ("perf build: Remove libunwind support") 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, 552 lines checked
WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?

linux-riscv-bot · 2026-03-22T00:42:11Z

Patch 1: "[v1,1/2] perf build: Remove libunwind support"
dtb-warn-rv64
Desc: Checks for Device Tree warnings/errors
Duration: 83.62 seconds
Result: PASS

linux-riscv-bot · 2026-03-22T00:42:13Z

Patch 1: "[v1,1/2] perf build: Remove libunwind support"
header-inline
Desc: Detects static functions without inline keyword in header files
Duration: 0.24 seconds
Result: PASS

linux-riscv-bot · 2026-03-22T00:42:17Z

Patch 1: "[v1,1/2] perf build: Remove libunwind support"
kdoc
Desc: Detects for kdoc errors
Duration: 1.98 seconds
Result: ERROR
Output:

Checking the tree before the patch
Warning: tools/perf/builtin-check.c:98 This comment starts with '/**', but isn't a kernel-doc comment. Refer to Documentation/doc-guide/kernel-doc.rst
 * check whether "feature" is built-in with perf
Warning: tools/perf/builtin-check.c:135 function parameter 'argc' not described in 'subcommand_feature'
Warning: tools/perf/builtin-check.c:135 function parameter 'argv' not described in 'subcommand_feature'
Warning: tools/perf/builtin-check.c:135 expecting prototype for Usage(). Prototype was for subcommand_feature() instead
Warning: tools/perf/util/dso.h:216 struct member 'maj' not described in 'dso_id'
Warning: tools/perf/util/dso.h:216 struct member 'min' not described in 'dso_id'
Warning: tools/perf/util/dso.h:216 struct member 'ino' not described in 'dso_id'
Warning: tools/perf/util/dso.h:216 struct member 'ino_generation' not described in 'dso_id'
Warning: tools/perf/util/dso.h:216 struct member 'maj' not described in 'dso_id'
Warning: tools/perf/util/dso.h:216 struct member 'min' not described in 'dso_id'
Warning: tools/perf/util/dso.h:216 struct member 'ino' not described in 'dso_id'
Warning: tools/perf/util/dso.h:216 struct member 'ino_generation' not described in 'dso_id'
Checking the tree with the patch
Error: Cannot find file tools/perf/arch/arm/util/unwind-libunwind.c
Error: Cannot find file tools/perf/arch/arm64/util/unwind-libunwind.c
Error: Cannot find file tools/perf/arch/loongarch/util/unwind-libunwind.c
Error: Cannot find file tools/perf/arch/mips/util/unwind-libunwind.c
Error: Cannot find file tools/perf/arch/powerpc/util/unwind-libunwind.c
Error: Cannot find file tools/perf/arch/x86/util/unwind-libunwind.c
Warning: tools/perf/builtin-check.c:97 This comment starts with '/**', but isn't a kernel-doc comment. Refer to Documentation/doc-guide/kernel-doc.rst
 * check whether "feature" is built-in with perf
Warning: tools/perf/builtin-check.c:134 function parameter 'argc' not described in 'subcommand_feature'
Warning: tools/perf/builtin-check.c:134 function parameter 'argv' not described in 'subcommand_feature'
Warning: tools/perf/builtin-check.c:134 expecting prototype for Usage(). Prototype was for subcommand_feature() instead
Warning: tools/perf/util/dso.h:216 struct member 'maj' not described in 'dso_id'
Warning: tools/perf/util/dso.h:216 struct member 'min' not described in 'dso_id'
Warning: tools/perf/util/dso.h:216 struct member 'ino' not described in 'dso_id'
Warning: tools/perf/util/dso.h:216 struct member 'ino_generation' not described in 'dso_id'
Error: Cannot find file tools/perf/util/libunwind/arm64.c
Error: Cannot find file tools/perf/util/libunwind/x86_32.c
Error: Cannot find file tools/perf/util/unwind-libunwind-local.c
Error: Cannot find file tools/perf/util/unwind-libunwind.c
Warning: tools/perf/util/dso.h:216 struct member 'maj' not described in 'dso_id'
Warning: tools/perf/util/dso.h:216 struct member 'min' not described in 'dso_id'
Warning: tools/perf/util/dso.h:216 struct member 'ino' not described in 'dso_id'
Warning: tools/perf/util/dso.h:216 struct member 'ino_generation' not described in 'dso_id'
Errors and warnings before: 13 this patch: 23
New warnings added
1c1,7
< Warning: tools/perf/builtin-check.c:98 This comment starts with '/**', but isn't a kernel-doc comment. Refer to Documentation/doc-guide/kernel-doc.rst
---
> Error: Cannot find file tools/perf/arch/arm/util/unwind-libunwind.c
> Error: Cannot find file tools/perf/arch/arm64/util/unwind-libunwind.c
> Error: Cannot find file tools/perf/arch/loongarch/util/unwind-libunwind.c
> Error: Cannot find file tools/perf/arch/mips/util/unwind-libunwind.c
> Error: Cannot find file tools/perf/arch/powerpc/util/unwind-libunwind.c
> Error: Cannot find file tools/perf/arch/x86/util/unwind-libunwind.c
> Warning: tools/perf/builtin-check.c:97 This comment starts with '/**', but isn't a kernel-doc comment. Refer to Documentation/doc-guide/kernel-doc.rst
3,5c9,11
< Warning: tools/perf/builtin-check.c:135 function parameter 'argc' not described in 'subcommand_feature'
< Warning: tools/perf/builtin-check.c:135 function parameter 'argv' not described in 'subcommand_feature'
< Warning: tools/perf/builtin-check.c:135 expecting prototype for Usage(). Prototype was for subcommand_feature() instead
---
> Warning: tools/perf/builtin-check.c:134 function parameter 'argc' not described in 'subcommand_feature'
> Warning: tools/perf/builtin-check.c:134 function parameter 'argv' not described in 'subcommand_feature'
> Warning: tools/perf/builtin-check.c:134 expecting prototype for Usage(). Prototype was for subcommand_feature() instead
9a16,19
> Error: Cannot find file tools/perf/util/libunwind/arm64.c
> Error: Cannot find file tools/perf/util/libunwind/x86_32.c
> Error: Cannot find file tools/perf/util/unwind-libunwind-local.c
> Error: Cannot find file tools/perf/util/unwind-libunwind.c
Per-file breakdown

linux-riscv-bot · 2026-03-22T00:42:18Z

Patch 1: "[v1,1/2] perf build: Remove libunwind support"
module-param
Desc: Detect module_param changes
Duration: 0.31 seconds
Result: PASS

linux-riscv-bot · 2026-03-22T00:42:20Z

Patch 1: "[v1,1/2] perf build: Remove libunwind support"
verify-fixes
Desc: Verifies that the Fixes: tags exist
Duration: 0.24 seconds
Result: PASS

linux-riscv-bot · 2026-03-22T00:42:22Z

Patch 1: "[v1,1/2] perf build: Remove libunwind support"
verify-signedoff
Desc: Verifies that Signed-off-by: tags are correct
Duration: 0.32 seconds
Result: PASS

linux-riscv-bot · 2026-03-22T00:44:55Z

Patch 2: "[v1,2/2] tools build: Remove libunwind feature tests"
build-rv32-defconfig
Desc: Builds riscv32 defconfig
Duration: 138.02 seconds
Result: PASS

linux-riscv-bot · 2026-03-22T01:01:43Z

Patch 2: "[v1,2/2] tools build: Remove libunwind feature tests"
build-rv64-clang-allmodconfig
Desc: Builds riscv64 allmodconfig with Clang, and checks for errors and added warnings
Duration: 1006.64 seconds
Result: PASS

linux-riscv-bot · 2026-03-22T01:24:36Z

Patch 2: "[v1,2/2] tools build: Remove libunwind feature tests"
build-rv64-gcc-allmodconfig
Desc: Builds riscv64 allmodconfig with GCC, and checks for errors and added warnings
Duration: 1371.07 seconds
Result: PASS

linux-riscv-bot · 2026-03-22T01:25:03Z

Patch 2: "[v1,2/2] tools build: Remove libunwind feature tests"
build-rv64-nommu-k210-defconfig
Desc: Builds riscv64 defconfig with NOMMU for K210
Duration: 25.94 seconds
Result: PASS

linux-riscv-bot · 2026-03-22T01:25:32Z

Patch 2: "[v1,2/2] tools build: Remove libunwind feature tests"
build-rv64-nommu-k210-virt
Desc: Builds riscv64 defconfig with NOMMU for the virt platform
Duration: 27.59 seconds
Result: PASS

linux-riscv-bot · 2026-03-22T01:25:36Z

Patch 2: "[v1,2/2] tools build: Remove libunwind feature tests"
checkpatch
Desc: Runs checkpatch.pl on the patch
Duration: 2.58 seconds
Result: WARNING
Output:

WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
#82: 
deleted file mode 100644

total: 0 errors, 1 warnings, 0 checks, 43 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 59493cc49456 ("tools build: Remove libunwind feature tests") 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, 43 lines checked
WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?

linux-riscv-bot · 2026-03-22T01:27:04Z

Patch 2: "[v1,2/2] tools build: Remove libunwind feature tests"
dtb-warn-rv64
Desc: Checks for Device Tree warnings/errors
Duration: 85.68 seconds
Result: PASS

linux-riscv-bot · 2026-03-22T01:27:05Z

Patch 2: "[v1,2/2] tools build: Remove libunwind feature tests"
header-inline
Desc: Detects static functions without inline keyword in header files
Duration: 0.23 seconds
Result: PASS

linux-riscv-bot · 2026-03-22T01:27:09Z

Patch 2: "[v1,2/2] tools build: Remove libunwind feature tests"
kdoc
Desc: Detects for kdoc errors
Duration: 1.87 seconds
Result: ERROR
Output:

Checking the tree before the patch
Checking the tree with the patch
Error: Cannot find file tools/build/feature/test-libunwind-aarch64.c
Error: Cannot find file tools/build/feature/test-libunwind-arm.c
Error: Cannot find file tools/build/feature/test-libunwind-debug-frame-aarch64.c
Error: Cannot find file tools/build/feature/test-libunwind-debug-frame-arm.c
Error: Cannot find file tools/build/feature/test-libunwind-debug-frame.c
Error: Cannot find file tools/build/feature/test-libunwind-x86.c
Error: Cannot find file tools/build/feature/test-libunwind-x86_64.c
Error: Cannot find file tools/build/feature/test-libunwind.c
Errors and warnings before: 0 this patch: 8
New warnings added
0a1,8
> Error: Cannot find file tools/build/feature/test-libunwind-aarch64.c
> Error: Cannot find file tools/build/feature/test-libunwind-arm.c
> Error: Cannot find file tools/build/feature/test-libunwind-debug-frame-aarch64.c
> Error: Cannot find file tools/build/feature/test-libunwind-debug-frame-arm.c
> Error: Cannot find file tools/build/feature/test-libunwind-debug-frame.c
> Error: Cannot find file tools/build/feature/test-libunwind-x86.c
> Error: Cannot find file tools/build/feature/test-libunwind-x86_64.c
> Error: Cannot find file tools/build/feature/test-libunwind.c
Per-file breakdown

linux-riscv-bot · 2026-03-22T01:27:10Z

Patch 2: "[v1,2/2] tools build: Remove libunwind feature tests"
module-param
Desc: Detect module_param changes
Duration: 0.25 seconds
Result: PASS

linux-riscv-bot · 2026-03-22T01:27:12Z

Patch 2: "[v1,2/2] tools build: Remove libunwind feature tests"
verify-fixes
Desc: Verifies that the Fixes: tags exist
Duration: 0.22 seconds
Result: PASS

linux-riscv-bot · 2026-03-22T01:27:14Z

Patch 2: "[v1,2/2] tools build: Remove libunwind feature tests"
verify-signedoff
Desc: Verifies that Signed-off-by: tags are correct
Duration: 0.29 seconds
Result: PASS

captain5050 added 2 commits March 21, 2026 23:53

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