Patchwork [3.5.yuz,extended,stable] Patch "arch/tile: avoid generating .eh_frame information in modules" has been added to staging queue

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Submitter Herton Ronaldo Krzesinski
Date Nov. 22, 2012, 4:47 a.m.
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Permalink /patch/200966/
State New
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Herton Ronaldo Krzesinski - Nov. 22, 2012, 4:47 a.m.
This is a note to let you know that I have just added a patch titled

    arch/tile: avoid generating .eh_frame information in modules

to the linux-3.5.y-queue branch of the 3.5.yuz extended stable tree 
which can be found at:;a=shortlog;h=refs/heads/linux-3.5.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.yuz tree, see



From 7d97779b24d73247d5f21932a8b2b151949d8236 Mon Sep 17 00:00:00 2001
From: Chris Metcalf <>
Date: Fri, 19 Oct 2012 11:43:11 -0400
Subject: [PATCH] arch/tile: avoid generating .eh_frame information in modules

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 <>
Signed-off-by: Herton Ronaldo Krzesinski <>
 arch/tile/Makefile |    4 ++++
 1 file changed, 4 insertions(+)



diff --git a/arch/tile/Makefile b/arch/tile/Makefile
index e20b0a0..7da1015 100644
--- a/arch/tile/Makefile
+++ b/arch/tile/Makefile
@@ -26,6 +26,10 @@  $(error Set TILERA_ROOT or CROSS_COMPILE when building $(ARCH) on $(HOST_ARCH))

+# 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