1 files changed, 26 insertions, 1 deletions

diff --git a/arch/arm/mm/fault.h b/arch/arm/mm/fault.h
index 49e9e3804de4..cf08bdfbe0d6 100644
--- a/arch/arm/mm/fault.h
+++ b/arch/arm/mm/fault.h
@@ -1,3 +1,28 @@
-void do_bad_area(unsigned long addr, unsigned int fsr, struct pt_regs *regs);
+#ifndef __ARCH_ARM_FAULT_H
+#define __ARCH_ARM_FAULT_H
+
+/*
+ * Fault status register encodings.  We steal bit 31 for our own purposes.
+ */
+#define FSR_LNX_PF              (1 << 31)
+#define FSR_WRITE               (1 << 11)
+#define FSR_FS4                 (1 << 10)
+#define FSR_FS3_0               (15)
+#define FSR_FS5_0               (0x3f)
+
+#ifdef CONFIG_ARM_LPAE
+static inline int fsr_fs(unsigned int fsr)
+{
+        return fsr & FSR_FS5_0;
+}
+#else
+static inline int fsr_fs(unsigned int fsr)
+{
+        return (fsr & FSR_FS3_0) | (fsr & FSR_FS4) >> 6;
+}
+#endif
 
+void do_bad_area(unsigned long addr, unsigned int fsr, struct pt_regs *regs);
 unsigned long search_exception_table(unsigned long addr);
+
+#endif  /* __ARCH_ARM_FAULT_H */