1 files changed, 6 insertions, 0 deletions

diff --git a/arch/sh/include/asm/pgtable.h b/arch/sh/include/asm/pgtable.h
index 43ef3e99fdd1..3cd7127af957 100644
--- a/arch/sh/include/asm/pgtable.h
+++ b/arch/sh/include/asm/pgtable.h
@@ -36,6 +36,12 @@ extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)];
 #define NEFF_SIGN       (1LL << (NEFF - 1))
 #define NEFF_MASK       (-1LL << NEFF)
 
+static inline unsigned long long neff_sign_extend(unsigned long val)
+{
+        unsigned long long extended = val;
+        return (extended & NEFF_SIGN) ? (extended | NEFF_MASK) : extended;
+}
+
 #ifdef CONFIG_29BIT
 #define NPHYS           29
 #else