From: Nicholas Piggin <npiggin@gmail.com>
To: linux-kbuild@vger.kernel.org
Cc: Nicholas Piggin <npiggin@gmail.com>,
linux-arch@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
Stephen Rothwell <sfr@canb.auug.org.au>,
Arnd Bergmann <arnd@arndb.de>, Nicolas Pitre <nico@linaro.org>,
Segher Boessenkool <segher@kernel.crashing.org>,
Alan Modra <amodra@gmail.com>
Subject: [PATCH 5/5] powerpc/64: use linker dce
Date: Fri, 5 Aug 2016 22:12:03 +1000 [thread overview]
Message-ID: <1470399123-8455-6-git-send-email-npiggin@gmail.com> (raw)
In-Reply-To: <1470399123-8455-1-git-send-email-npiggin@gmail.com>
---
arch/powerpc/kernel/Makefile | 3 +++
arch/powerpc/kernel/vmlinux.lds.S | 2 +-
arch/powerpc/platforms/Kconfig.cputype | 1 +
3 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index 2da380f..b356e59 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -4,7 +4,10 @@
CFLAGS_ptrace.o += -DUTS_MACHINE='"$(UTS_MACHINE)"'
+ccflags-y += -fno-function-sections -fno-data-sections
+
subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
+subdir-ccflags-y += -fno-function-sections -fno-data-sections
ifeq ($(CONFIG_PPC64),y)
CFLAGS_prom_init.o += $(NO_MINIMAL_TOC)
diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index 2dd91f7..c157b8d 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -50,7 +50,7 @@ SECTIONS
HEAD_TEXT
_text = .;
/* careful! __ftr_alt_* sections need to be close to .text */
- *(.text .fixup __ftr_alt_* .ref.text)
+ *(.text .text.* .fixup __ftr_alt_* .ref.text)
SCHED_TEXT
LOCK_TEXT
KPROBES_TEXT
diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index 3c77091..6afeb9d 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -3,6 +3,7 @@ config PPC64
default n
select HAVE_VIRT_CPU_ACCOUNTING
select THIN_ARCHIVES
+ select LINKER_DCE
select ZLIB_DEFLATE
help
This option selects whether a 32-bit or a 64-bit kernel
--
2.8.1
next prev parent reply other threads:[~2016-08-05 12:13 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-05 12:11 [RFC][PATCH 0/5] kbuild changes, thin archives, --gc-sections Nicholas Piggin
2016-08-05 12:11 ` [PATCH 1/5] kbuild: allow architectures to use thin archives instead of ld -r Nicholas Piggin
2016-08-06 3:50 ` kbuild test robot
2016-08-06 20:10 ` Sam Ravnborg
2016-08-07 1:49 ` Stephen Rothwell
2016-08-07 3:34 ` Alan Modra
2016-08-07 4:17 ` Nicolas Pitre
2016-08-07 14:40 ` Sam Ravnborg
2016-08-08 3:19 ` Nicholas Piggin
2016-08-08 4:46 ` Sam Ravnborg
2016-08-08 3:25 ` Nicholas Piggin
2016-08-08 9:18 ` Arnd Bergmann
2016-08-05 12:12 ` [PATCH 2/5] kbuild: allow archs to select build for link dead code/data elimination Nicholas Piggin
2016-08-06 20:14 ` Sam Ravnborg
2016-08-08 3:29 ` Nicholas Piggin
2016-08-08 4:49 ` Sam Ravnborg
2016-08-07 5:33 ` Nicolas Pitre
2016-08-08 3:42 ` Nicholas Piggin
2016-08-08 4:12 ` Nicolas Pitre
2016-08-08 4:27 ` Nicholas Piggin
2016-08-07 9:57 ` Alan Modra
2016-08-07 11:35 ` Andreas Schwab
2016-08-07 20:26 ` Arnd Bergmann
2016-08-07 23:49 ` Alan Modra
2016-08-08 15:14 ` Arnd Bergmann
2016-08-08 23:50 ` Alan Modra
2016-08-09 22:10 ` Arnd Bergmann
2016-08-09 3:16 ` Andi Kleen
2016-08-09 22:29 ` Arnd Bergmann
2016-08-09 23:08 ` Andi Kleen
2016-08-10 0:37 ` Andi Kleen
2016-08-05 12:12 ` [PATCH 3/5] kbuild: add arch specific post-module-link pass Nicholas Piggin
2016-08-05 13:56 ` Nicholas Piggin
2016-08-06 20:16 ` Sam Ravnborg
2016-08-08 3:30 ` Nicholas Piggin
2016-08-05 12:12 ` [PATCH 4/5] powerpc: switch to using thin archives Nicholas Piggin
2016-08-05 12:12 ` Nicholas Piggin [this message]
2016-08-05 13:32 ` [RFC][PATCH 0/5] kbuild changes, thin archives, --gc-sections Nicholas Piggin
2016-08-07 20:23 ` Arnd Bergmann
2016-08-08 3:53 ` Nicholas Piggin
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