.Laccess_ok_\@:
.endm
+/*
+ * verify_area determines whether a memory access is allowed. It's
+ * mostly an unnecessary wrapper for access_ok, but we provide it as a
+ * duplicate of the verify_area() C inline function below. See the
+ * equivalent C version below for clarity.
+ *
+ * On error, verify_area branches to a label indicated by parameter
+ * <error>. This implies that the macro falls through to the next
+ * instruction on success.
+ *
+ * Note that we assume success is the common case, and we optimize the
+ * branch fall-through case on success.
+ *
+ * On Entry:
+ * <aa> register containing memory address
+ * <as> register containing memory size
+ * <at> temp register
+ * <error> label to branch to on error; implies fall-through
+ * macro on success
+ * On Exit:
+ * <aa> preserved
+ * <as> preserved
+ * <at> destroyed
+ */
+ .macro verify_area aa, as, at, sp, error
+ access_ok \at, \aa, \as, \sp, \error
+ .endm
+
+
#else /* __ASSEMBLY__ not defined */
#include <linux/sched.h>
#define __access_ok(addr,size) (__kernel_ok || __user_ok((addr),(size)))
#define access_ok(type,addr,size) __access_ok((unsigned long)(addr),(size))
+static inline int verify_area(int type, const void * addr, unsigned long size)
+{
+ return access_ok(type,addr,size) ? 0 : -EFAULT;
+}
+
/*
* These are the main single-value transfer routines. They
* automatically use the right size if we just have the right pointer