diff --git a/fs/reiserfs/reiserfs.h b/fs/reiserfs/reiserfs.h
index 66a2e83..dfb617b 100644
--- a/fs/reiserfs/reiserfs.h
+++ b/fs/reiserfs/reiserfs.h
@@ -1958,10 +1958,6 @@
 #define MAX_US_INT 0xffff
 
 // reiserfs version 2 has max offset 60 bits. Version 1 - 32 bit offset
-#ifndef U32_MAX
-#define U32_MAX (~(__u32)0)
-#endif /* !U32_MAX */
-
 static inline loff_t max_reiserfs_offset(struct inode *inode)
 {
 	if (get_inode_item_key_version(inode) == KEY_FORMAT_3_5)
diff --git a/include/linux/ceph/decode.h b/include/linux/ceph/decode.h
index 27fe66a..a6ef9cc 100644
--- a/include/linux/ceph/decode.h
+++ b/include/linux/ceph/decode.h
@@ -8,25 +8,6 @@
 
 #include <linux/ceph/types.h>
 
-/* This seemed to be the easiest place to define these */
-
-#ifndef U32_MAX
-#define	U8_MAX	((u8)(~0U))
-#define	U16_MAX	((u16)(~0U))
-#define	U32_MAX	((u32)(~0U))
-#define	U64_MAX	((u64)(~0ULL))
-
-#define	S8_MAX	((s8)(U8_MAX >> 1))
-#define	S16_MAX	((s16)(U16_MAX >> 1))
-#define	S32_MAX	((s32)(U32_MAX >> 1))
-#define	S64_MAX	((s64)(U64_MAX >> 1LL))
-
-#define	S8_MIN	((s8)(-S8_MAX - 1))
-#define	S16_MIN	((s16)(-S16_MAX - 1))
-#define	S32_MIN	((s32)(-S32_MAX - 1))
-#define	S64_MIN	((s64)(-S64_MAX - 1LL))
-#endif /* !U32_MAX */
-
 /*
  * in all cases,
  *   void **p     pointer to position pointer
diff --git a/net/ipv4/tcp_illinois.c b/net/ipv4/tcp_illinois.c
index f439472..e498a62 100644
--- a/net/ipv4/tcp_illinois.c
+++ b/net/ipv4/tcp_illinois.c
@@ -23,9 +23,6 @@
 #define ALPHA_MIN	((3*ALPHA_SCALE)/10)	/* ~0.3 */
 #define ALPHA_MAX	(10*ALPHA_SCALE)	/* 10.0 */
 #define ALPHA_BASE	ALPHA_SCALE		/* 1.0 */
-#ifndef U32_MAX
-#define U32_MAX		((u32)~0U)
-#endif /* !U32_MAX */
 #define RTT_MAX		(U32_MAX / ALPHA_MAX)	/* 3.3 secs */
 
 #define BETA_SHIFT	6