* [PATCH] arm64: Fix build with CC=clang, CONFIG_FTRACE=y and CONFIG_STACK_TRACER=y
@ 2023-01-09 12:27 James Clark
2023-01-09 17:45 ` Will Deacon
2023-01-09 17:50 ` Nathan Chancellor
0 siblings, 2 replies; 3+ messages in thread
From: James Clark @ 2023-01-09 12:27 UTC (permalink / raw)
To: linux-arm-kernel, mark.rutland
Cc: James Clark, Catalin Marinas, Will Deacon, Nathan Chancellor,
Nick Desaulniers, Tom Rix, Steven Rostedt (Google),
Florent Revest, Masami Hiramatsu (Google),
linux-kernel, llvm
commit 45bd8951806e ("arm64: Improve HAVE_DYNAMIC_FTRACE_WITH_REGS
selection for clang") fixed the build with the above combination by
splitting HAVE_DYNAMIC_FTRACE_WITH_REGS into separate checks for
Clang and GCC.
commit 26299b3f6ba2 ("ftrace: arm64: move from REGS to ARGS") added the
GCC only check "-fpatchable-function-entry=2" back in unconditionally
which breaks the build.
Remove the unconditional check, because the conditional ones were also
updated to _ARGS in the above commit, so they work correctly on their
own.
Fixes: 26299b3f6ba2 ("ftrace: arm64: move from REGS to ARGS")
Signed-off-by: James Clark <james.clark@arm.com>
---
arch/arm64/Kconfig | 2 --
1 file changed, 2 deletions(-)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index cf6d1cd8b6dc..c5ccca26a408 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -184,8 +184,6 @@ config ARM64
select HAVE_DEBUG_KMEMLEAK
select HAVE_DMA_CONTIGUOUS
select HAVE_DYNAMIC_FTRACE
- select HAVE_DYNAMIC_FTRACE_WITH_ARGS \
- if $(cc-option,-fpatchable-function-entry=2)
select FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY \
if DYNAMIC_FTRACE_WITH_ARGS
select HAVE_EFFICIENT_UNALIGNED_ACCESS
base-commit: 5db568e748f6fb7d0d2e1bff4c2698ad4f50b982
--
2.25.1
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] arm64: Fix build with CC=clang, CONFIG_FTRACE=y and CONFIG_STACK_TRACER=y
2023-01-09 12:27 [PATCH] arm64: Fix build with CC=clang, CONFIG_FTRACE=y and CONFIG_STACK_TRACER=y James Clark
@ 2023-01-09 17:45 ` Will Deacon
2023-01-09 17:50 ` Nathan Chancellor
1 sibling, 0 replies; 3+ messages in thread
From: Will Deacon @ 2023-01-09 17:45 UTC (permalink / raw)
To: James Clark, linux-arm-kernel, mark.rutland
Cc: catalin.marinas, kernel-team, Will Deacon, Tom Rix,
Florent Revest, Nick Desaulniers, Masami Hiramatsu (Google),
Steven Rostedt (Google),
linux-kernel, Nathan Chancellor, llvm
On Mon, 9 Jan 2023 12:27:43 +0000, James Clark wrote:
> commit 45bd8951806e ("arm64: Improve HAVE_DYNAMIC_FTRACE_WITH_REGS
> selection for clang") fixed the build with the above combination by
> splitting HAVE_DYNAMIC_FTRACE_WITH_REGS into separate checks for
> Clang and GCC.
>
> commit 26299b3f6ba2 ("ftrace: arm64: move from REGS to ARGS") added the
> GCC only check "-fpatchable-function-entry=2" back in unconditionally
> which breaks the build.
>
> [...]
Applied to arm64 (for-next/fixes), thanks!
[1/1] arm64: Fix build with CC=clang, CONFIG_FTRACE=y and CONFIG_STACK_TRACER=y
https://git.kernel.org/arm64/c/68a63a412d18
Cheers,
--
Will
https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] arm64: Fix build with CC=clang, CONFIG_FTRACE=y and CONFIG_STACK_TRACER=y
2023-01-09 12:27 [PATCH] arm64: Fix build with CC=clang, CONFIG_FTRACE=y and CONFIG_STACK_TRACER=y James Clark
2023-01-09 17:45 ` Will Deacon
@ 2023-01-09 17:50 ` Nathan Chancellor
1 sibling, 0 replies; 3+ messages in thread
From: Nathan Chancellor @ 2023-01-09 17:50 UTC (permalink / raw)
To: James Clark
Cc: linux-arm-kernel, mark.rutland, Catalin Marinas, Will Deacon,
Nick Desaulniers, Tom Rix, Steven Rostedt (Google),
Florent Revest, Masami Hiramatsu (Google),
linux-kernel, llvm
On Mon, Jan 09, 2023 at 12:27:43PM +0000, James Clark wrote:
> commit 45bd8951806e ("arm64: Improve HAVE_DYNAMIC_FTRACE_WITH_REGS
> selection for clang") fixed the build with the above combination by
> splitting HAVE_DYNAMIC_FTRACE_WITH_REGS into separate checks for
> Clang and GCC.
>
> commit 26299b3f6ba2 ("ftrace: arm64: move from REGS to ARGS") added the
> GCC only check "-fpatchable-function-entry=2" back in unconditionally
> which breaks the build.
>
> Remove the unconditional check, because the conditional ones were also
> updated to _ARGS in the above commit, so they work correctly on their
> own.
>
> Fixes: 26299b3f6ba2 ("ftrace: arm64: move from REGS to ARGS")
> Signed-off-by: James Clark <james.clark@arm.com>
Just for posterity, since I see it was already applied:
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
> ---
> arch/arm64/Kconfig | 2 --
> 1 file changed, 2 deletions(-)
>
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index cf6d1cd8b6dc..c5ccca26a408 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -184,8 +184,6 @@ config ARM64
> select HAVE_DEBUG_KMEMLEAK
> select HAVE_DMA_CONTIGUOUS
> select HAVE_DYNAMIC_FTRACE
> - select HAVE_DYNAMIC_FTRACE_WITH_ARGS \
> - if $(cc-option,-fpatchable-function-entry=2)
> select FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY \
> if DYNAMIC_FTRACE_WITH_ARGS
> select HAVE_EFFICIENT_UNALIGNED_ACCESS
>
> base-commit: 5db568e748f6fb7d0d2e1bff4c2698ad4f50b982
> --
> 2.25.1
>
^ permalink raw reply [flat|nested] 3+ messages in thread
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2023-01-09 12:27 [PATCH] arm64: Fix build with CC=clang, CONFIG_FTRACE=y and CONFIG_STACK_TRACER=y James Clark
2023-01-09 17:45 ` Will Deacon
2023-01-09 17:50 ` Nathan Chancellor
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