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-rw-r--r--include/asm-x86/uaccess.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/asm-x86/uaccess.h b/include/asm-x86/uaccess.h
index 8cb580c..8a1e45f 100644
--- a/include/asm-x86/uaccess.h
+++ b/include/asm-x86/uaccess.h
@@ -33,6 +33,10 @@
#define segment_eq(a, b) ((a).seg == (b).seg)
+#define __addr_ok(addr) \
+ ((unsigned long __force)(addr) < \
+ (current_thread_info()->addr_limit.seg))
+
/*
* Test whether a block of memory is a valid user space address.
* Returns 0 if the range is valid, nonzero otherwise.
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