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authorGlauber Costa <gcosta@redhat.com>2008-03-25 18:36:36 -0300
committerIngo Molnar <mingo@elte.hu>2008-04-19 19:19:56 +0200
commit7c18341665917b493fa40eeb3c7ff6c1a5ac47db (patch)
treef027237e256fe89ca03b83f8eb32978560b092da /arch/x86
parentb48ee7135230ac43b6820d59a784ac0bd51ae552 (diff)
x86: provide a bad_dma_address symbol for i386
It's initially 0, since we don't expect any DMA there. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/kernel/pci-dma_32.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kernel/pci-dma_32.c b/arch/x86/kernel/pci-dma_32.c
index 453b4bda271..55ab3c874d8 100644
--- a/arch/x86/kernel/pci-dma_32.c
+++ b/arch/x86/kernel/pci-dma_32.c
@@ -14,6 +14,10 @@
#include <linux/module.h>
#include <asm/io.h>
+/* For i386, we make it point to the NULL address */
+dma_addr_t bad_dma_address __read_mostly = 0x0;
+EXPORT_SYMBOL(bad_dma_address);
+
struct dma_coherent_mem {
void *virt_base;
u32 device_base;