conditionally define U32_MAX

The symbol U32_MAX is defined in several spots.  Change these
definitions to be conditional.  This is in preparation for the next
patch, which centralizes the definition in <linux/kernel.h>.

Signed-off-by: Alex Elder <elder@linaro.org>
Cc: Sage Weil <sage@inktank.com>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/net/ipv4/tcp_illinois.c b/net/ipv4/tcp_illinois.c
index 8a520996f3d2..f43947235b35 100644
--- a/net/ipv4/tcp_illinois.c
+++ b/net/ipv4/tcp_illinois.c
@@ -23,7 +23,9 @@
 #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