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authorTejun Heo <tj@kernel.org>2009-05-26 14:42:40 +0900
committerH. Peter Anvin <hpa@zytor.com>2009-05-25 22:52:49 -0700
commit46176b4f6bac19454b7b5c35f68594b85850a600 (patch)
treec67571802f614aa361726d513e9a8fcaee603fb1 /drivers/acpi
parent71c9d8b68b299bef614afc7907393564a9f1476f (diff)
x86, relocs: ignore R_386_NONE in kernel relocation entries
For relocatable 32bit kernels, boot/compressed/relocs.c processes relocation entries in the kernel image and appends it to the kernel image such that boot/compressed/head_32.S can relocate the kernel. The kernel image is one statically linked object and only uses two relocation types - R_386_PC32 and R_386_32, of the two only the latter needs massaging during kernel relocation and thus handled by relocs. R_386_PC32 is ignored and all other relocation types are considered error. When the target of a relocation resides in a discarded section, binutils doesn't throw away the relocation record but nullifies it by changing it to R_386_NONE, which unfortunately makes relocs fail. The problem was triggered by yet out-of-tree x86 stack unwind patches but given the binutils behavior, ignoring R_386_NONE is the right thing to do. The problem has been tracked down to binutils behavior by Jan Beulich. [ Impact: fix build with certain binutils by ignoring R_386_NONE ] Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Jan Beulich <JBeulich@novell.com> Cc: Ingo Molnar <mingo@elte.hu> LKML-Reference: <4A1B8150.40702@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'drivers/acpi')
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