diff options
| author | Anton Blanchard <anton@samba.org> | 2012-11-26 21:41:08 +0400 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-01-10 10:00:31 +0400 |
| commit | 1fbe9cf2598dae3bd464d860bd89c67b1ff8682b (patch) | |
| tree | c07f1fe789777669466bc3077a5f0afa70cf83b6 /arch/powerpc/platforms | |
| parent | 5827d4165ac608d7c26fa68701391e80824ee5c9 (diff) | |
| download | linux-1fbe9cf2598dae3bd464d860bd89c67b1ff8682b.tar.xz | |
powerpc: Build kernel with -mcmodel=medium
Finally remove the two level TOC and build with -mcmodel=medium.
Unfortunately we can't build modules with -mcmodel=medium due to
the tricks the kernel module loader plays with percpu data:
# -mcmodel=medium breaks modules because it uses 32bit offsets from
# the TOC pointer to create pointers where possible. Pointers into the
# percpu data area are created by this method.
#
# The kernel module loader relocates the percpu data section from the
# original location (starting with 0xd...) to somewhere in the base
# kernel percpu data space (starting with 0xc...). We need a full
# 64bit relocation for this to work, hence -mcmodel=large.
On older kernels we fall back to the two level TOC (-mminimal-toc)
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/platforms')
| -rw-r--r-- | arch/powerpc/platforms/pseries/Makefile | 2 | ||||
| -rw-r--r-- | arch/powerpc/platforms/wsp/Makefile | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/arch/powerpc/platforms/pseries/Makefile b/arch/powerpc/platforms/pseries/Makefile index 890622b87c8f..53866e537a92 100644 --- a/arch/powerpc/platforms/pseries/Makefile +++ b/arch/powerpc/platforms/pseries/Makefile @@ -1,4 +1,4 @@ -ccflags-$(CONFIG_PPC64) := -mno-minimal-toc +ccflags-$(CONFIG_PPC64) := $(NO_MINIMAL_TOC) ccflags-$(CONFIG_PPC_PSERIES_DEBUG) += -DDEBUG obj-y := lpar.o hvCall.o nvram.o reconfig.o \ diff --git a/arch/powerpc/platforms/wsp/Makefile b/arch/powerpc/platforms/wsp/Makefile index 56817ac98fc9..162fc60125a2 100644 --- a/arch/powerpc/platforms/wsp/Makefile +++ b/arch/powerpc/platforms/wsp/Makefile @@ -1,4 +1,4 @@ -ccflags-y += -mno-minimal-toc +ccflags-y += $(NO_MINIMAL_TOC) obj-y += setup.o ics.o wsp.o obj-$(CONFIG_PPC_PSR2) += psr2.o |