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-rw-r--r--arch/hexagon/include/asm/uaccess.h18
1 files changed, 9 insertions, 9 deletions
diff --git a/arch/hexagon/include/asm/uaccess.h b/arch/hexagon/include/asm/uaccess.h
index ef5bfef8d490..719ba3f3c45c 100644
--- a/arch/hexagon/include/asm/uaccess.h
+++ b/arch/hexagon/include/asm/uaccess.h
@@ -25,17 +25,17 @@
* Returns true (nonzero) if the memory block *may* be valid, false (zero)
* if it is definitely invalid.
*
- * User address space in Hexagon, like x86, goes to 0xbfffffff, so the
- * simple MSB-based tests used by MIPS won't work. Some further
- * optimization is probably possible here, but for now, keep it
- * reasonably simple and not *too* slow. After all, we've got the
- * MMU for backup.
*/
+#define uaccess_kernel() (get_fs().seg == KERNEL_DS.seg)
+#define user_addr_max() (uaccess_kernel() ? ~0UL : TASK_SIZE)
-#define __access_ok(addr, size) \
- ((get_fs().seg == KERNEL_DS.seg) || \
- (((unsigned long)addr < get_fs().seg) && \
- (unsigned long)size < (get_fs().seg - (unsigned long)addr)))
+static inline int __access_ok(unsigned long addr, unsigned long size)
+{
+ unsigned long limit = TASK_SIZE;
+
+ return (size <= limit) && (addr <= (limit - size));
+}
+#define __access_ok __access_ok
/*
* When a kernel-mode page fault is taken, the faulting instruction