From: Hari Bathini <hbathini@linux.ibm.com>
To: linuxppc-dev <linuxppc-dev@lists.ozlabs.org>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>,
Christophe Leroy <christophe.leroy@csgroup.eu>,
"Naveen N. Rao" <naveen@kernel.org>,
Michael Ellerman <mpe@ellerman.id.au>,
linux-trace-kernel@vger.kernel.org,
Mark Rutland <mark.rutland@arm.com>,
Steven Rostedt <rostedt@goodmis.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
llvm@lists.linux.dev, Maryam Moghadas <maryammo@ca.ibm.com>
Subject: [PATCH 1/3] powerpc64: make clang cross-build friendly
Date: Sun, 9 Nov 2025 02:34:03 +0530 [thread overview]
Message-ID: <20251108210405.2375472-2-hbathini@linux.ibm.com> (raw)
In-Reply-To: <20251108210405.2375472-1-hbathini@linux.ibm.com>
ARCH_USING_PATCHABLE_FUNCTION_ENTRY depends on toolchain support for
-fpatchable-function-entry option. The current script that checks
for this support only handles GCC. Rename the script and extend it
to detect support for -fpatchable-function-entry with Clang as well,
allowing clean cross-compilation with Clang toolchains.
Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
---
arch/powerpc/Kconfig | 5 +++--
...-function-entry.sh => check-fpatchable-function-entry.sh} | 0
2 files changed, 3 insertions(+), 2 deletions(-)
rename arch/powerpc/tools/{gcc-check-fpatchable-function-entry.sh => check-fpatchable-function-entry.sh} (100%)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 325c1171894d..dfb62e211c92 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -568,8 +568,9 @@ config ARCH_USING_PATCHABLE_FUNCTION_ENTRY
depends on FUNCTION_TRACER && (PPC32 || PPC64_ELF_ABI_V2)
depends on $(cc-option,-fpatchable-function-entry=2)
def_bool y if PPC32
- def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-fpatchable-function-entry.sh $(CC) -mlittle-endian) if PPC64 && CPU_LITTLE_ENDIAN
- def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-fpatchable-function-entry.sh $(CC) -mbig-endian) if PPC64 && CPU_BIG_ENDIAN
+ def_bool $(success,$(srctree)/arch/powerpc/tools/check-fpatchable-function-entry.sh $(CC) -mlittle-endian) if PPC64 && CPU_LITTLE_ENDIAN && CC_IS_GCC
+ def_bool $(success,$(srctree)/arch/powerpc/tools/check-fpatchable-function-entry.sh $(CC) -target ppc64le -mlittle-endian) if PPC64 && CPU_LITTLE_ENDIAN && CC_IS_CLANG
+ def_bool $(success,$(srctree)/arch/powerpc/tools/check-fpatchable-function-entry.sh $(CC) -mbig-endian) if PPC64 && CPU_BIG_ENDIAN
config PPC_FTRACE_OUT_OF_LINE
def_bool PPC64 && ARCH_USING_PATCHABLE_FUNCTION_ENTRY
diff --git a/arch/powerpc/tools/gcc-check-fpatchable-function-entry.sh b/arch/powerpc/tools/check-fpatchable-function-entry.sh
similarity index 100%
rename from arch/powerpc/tools/gcc-check-fpatchable-function-entry.sh
rename to arch/powerpc/tools/check-fpatchable-function-entry.sh
--
2.51.1
next prev parent reply other threads:[~2025-11-08 21:04 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-08 21:04 [PATCH 0/3] powerpc64/ftrace: fixes clang build issues Hari Bathini
2025-11-08 21:04 ` Hari Bathini [this message]
2025-11-24 5:49 ` [PATCH 1/3] powerpc64: make clang cross-build friendly Naveen N Rao
2025-12-08 16:02 ` Hari Bathini
2025-11-08 21:04 ` [PATCH 2/3] powerpc64/ftrace: fix OOL stub count with clang Hari Bathini
2025-11-08 21:04 ` [PATCH 3/3] powerpc64/ftrace: workaround clang recording GEP in __patchable_function_entries Hari Bathini
2025-11-24 5:55 ` Naveen N Rao
2025-12-08 16:08 ` Hari Bathini
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20251108210405.2375472-2-hbathini@linux.ibm.com \
--to=hbathini@linux.ibm.com \
--cc=christophe.leroy@csgroup.eu \
--cc=linux-trace-kernel@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=llvm@lists.linux.dev \
--cc=maddy@linux.ibm.com \
--cc=mark.rutland@arm.com \
--cc=maryammo@ca.ibm.com \
--cc=mhiramat@kernel.org \
--cc=mpe@ellerman.id.au \
--cc=naveen@kernel.org \
--cc=rostedt@goodmis.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).