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| author | Glauber Costa | 2008-03-25 22:36:36 +0100 |
|---|---|---|
| committer | Ingo Molnar | 2008-04-19 19:19:56 +0200 |
| commit | 7c18341665917b493fa40eeb3c7ff6c1a5ac47db (patch) | |
| tree | f027237e256fe89ca03b83f8eb32978560b092da /arch/x86/kernel/pci-dma_32.c | |
| parent | x86: align to clflush size (diff) | |
| download | kernel-qcow2-linux-7c18341665917b493fa40eeb3c7ff6c1a5ac47db.tar.gz kernel-qcow2-linux-7c18341665917b493fa40eeb3c7ff6c1a5ac47db.tar.xz kernel-qcow2-linux-7c18341665917b493fa40eeb3c7ff6c1a5ac47db.zip | |
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/kernel/pci-dma_32.c')
| -rw-r--r-- | arch/x86/kernel/pci-dma_32.c | 4 |
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 453b4bda2714..55ab3c874d8f 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; |