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path: root/arch/sh/drivers/pci/pci.c
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Diffstat (limited to 'arch/sh/drivers/pci/pci.c')
-rw-r--r--arch/sh/drivers/pci/pci.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/sh/drivers/pci/pci.c b/arch/sh/drivers/pci/pci.c
index e4c988d46ad5..af4191bbb179 100644
--- a/arch/sh/drivers/pci/pci.c
+++ b/arch/sh/drivers/pci/pci.c
@@ -19,6 +19,7 @@
#include <linux/dma-debug.h>
#include <linux/io.h>
#include <linux/mutex.h>
+#include <linux/spinlock.h>
unsigned long PCIBIOS_MIN_IO = 0x0000;
unsigned long PCIBIOS_MIN_MEM = 0;
@@ -56,6 +57,11 @@ static void __devinit pcibios_scanbus(struct pci_channel *hose)
}
}
+/*
+ * This interrupt-safe spinlock protects all accesses to PCI
+ * configuration space.
+ */
+DEFINE_RAW_SPINLOCK(pci_config_lock);
static DEFINE_MUTEX(pci_scan_mutex);
int __devinit register_pci_controller(struct pci_channel *hose)