This is a note to let you know that I've just added the patch titled
arch/tile: avoid generating .eh_frame information in modules
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arch-tile-avoid-generating-.eh_frame-information-in-modules.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From 627072b06c362bbe7dc256f618aaa63351f0cfe6 Mon Sep 17 00:00:00 2001
From: Chris Metcalf <cmetc...@tilera.com>
Date: Fri, 19 Oct 2012 11:43:11 -0400
Subject: arch/tile: avoid generating .eh_frame information in modules
From: Chris Metcalf <cmetc...@tilera.com>
commit 627072b06c362bbe7dc256f618aaa63351f0cfe6 upstream.
The tile tool chain uses the .eh_frame information for backtracing.
The vmlinux build drops any .eh_frame sections at link time, but when
present in kernel modules, it causes a module load failure due to the
presence of unsupported pc-relative relocations. When compiling to
use compiler feedback support, the compiler by default omits .eh_frame
information, so we don't see this problem. But when not using feedback,
we need to explicitly suppress the .eh_frame.
Signed-off-by: Chris Metcalf <cmetc...@tilera.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
arch/tile/Makefile | 4 ++++
1 file changed, 4 insertions(+)
--- a/arch/tile/Makefile
+++ b/arch/tile/Makefile
@@ -26,6 +26,10 @@ $(error Set TILERA_ROOT or CROSS_COMPILE
endif
endif
+# The tile compiler may emit .eh_frame information for backtracing.
+# In kernel modules, this causes load failures due to unsupported relocations.
+KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
+
ifneq ($(CONFIG_DEBUG_EXTRA_FLAGS),"")
KBUILD_CFLAGS += $(CONFIG_DEBUG_EXTRA_FLAGS)
endif
Patches currently in stable-queue which might be from cmetc...@tilera.com are
queue-3.4/arch-tile-avoid-generating-.eh_frame-information-in-modules.patch
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