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-rw-r--r--arch/microblaze/include/asm/uaccess.h30
1 files changed, 19 insertions, 11 deletions
diff --git a/arch/microblaze/include/asm/uaccess.h b/arch/microblaze/include/asm/uaccess.h
index a1ab5f0009e..efe59d88178 100644
--- a/arch/microblaze/include/asm/uaccess.h
+++ b/arch/microblaze/include/asm/uaccess.h
@@ -90,17 +90,25 @@ static inline int ___range_ok(unsigned long addr, unsigned long size)
#else
-/*
- * Address is valid if:
- * - "addr", "addr + size" and "size" are all below the limit
- */
-#define access_ok(type, addr, size) \
- (get_fs().seg >= (((unsigned long)(addr)) | \
- (size) | ((unsigned long)(addr) + (size))))
-
-/* || printk("access_ok failed for %s at 0x%08lx (size %d), seg 0x%08x\n",
- type?"WRITE":"READ",addr,size,get_fs().seg)) */
-
+static inline int access_ok(int type, const void __user *addr,
+ unsigned long size)
+{
+ if (!size)
+ goto ok;
+
+ if ((get_fs().seg < ((unsigned long)addr)) ||
+ (get_fs().seg < ((unsigned long)addr + size - 1))) {
+ pr_debug("ACCESS fail: %s at 0x%08x (size 0x%x), seg 0x%08x\n",
+ type ? "WRITE" : "READ ", (u32)addr, (u32)size,
+ (u32)get_fs().seg);
+ return 0;
+ }
+ok:
+ pr_debug("ACCESS OK: %s at 0x%08x (size 0x%x), seg 0x%08x\n",
+ type ? "WRITE" : "READ ", (u32)addr, (u32)size,
+ (u32)get_fs().seg);
+ return 1;
+}
#endif
#ifdef CONFIG_MMU