[PATCH] x86: Fix crash on X86 with IOMMU_INIT functinality.
From: Konrad Rzeszutek Wilk
Date: Mon Aug 30 2010 - 14:27:51 EST
The crux of the failure was that even if we did not use any
of the .iommu_table section, the linker would still insert it
in the vmlinux file. This patch fixes and also the failure
during runtime where we would try to access the array:
DMA-API: preallocated 32768 debug entries
DMA-API: debugging enabled by kernel config
BUG: unable to handle kernel paging request at 19da8955
IP: [<f4ffffff>] 0xf4ffffff
*pde = 00000000
Reported-by: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
LKML-Reference: <20100829173216.GA19896@xxxxxxx>
---
arch/x86/kernel/vmlinux.lds.S | 3 +--
1 files changed, 1 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index 3f07c37..38e2b67 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -285,10 +285,9 @@ SECTIONS
.iommu_table : AT(ADDR(.iommu_table) - LOAD_OFFSET) {
__iommu_table = .;
*(.iommu_table)
- . = ALIGN(8);
__iommu_table_end = .;
}
-
+ . = ALIGN(8);
/*
* .exit.text is discard at runtime, not link time, to deal with
* references from .altinstructions and .eh_frame
--
1.7.0.1
--
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