[PATCH 4/5 ver2] rt2x00: Compiler warning unmasked by fix of BUILD_BUG_ON

[Boaz Harrosh]

A "Set" of a sign-bit in an "&" operation causes a compiler warning.
Make calculations unsigned.

[ The warning was masked by the use of (void)() cast in the old
  BUILD_BUG_ON() ]

Signed-off-by: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
TO: Ivo van Doorn <IvDoorn@xxxxxxxxx>
TO: John W. Linville <linville@xxxxxxxxxxxxx>
CC: Ingo Molnar <mingo@xxxxxxx>
CC: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
---
 drivers/net/wireless/rt2x00/rt2x00reg.h |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/rt2x00/rt2x00reg.h b/drivers/net/wireless/rt2x00/rt2x00reg.h
index 7e88ce5..e71b793 100644
--- a/drivers/net/wireless/rt2x00/rt2x00reg.h
+++ b/drivers/net/wireless/rt2x00/rt2x00reg.h
@@ -136,8 +136,8 @@ struct rt2x00_field32 {
  */
 #define is_power_of_two(x)	( !((x) & ((x)-1)) )
 #define low_bit_mask(x)		( ((x)-1) & ~(x) )
-#define is_valid_mask(x)	is_power_of_two(1 + (x) + low_bit_mask(x))
-
+#define is_valid_mask(x)	is_power_of_two(1 + (x) + \
+					low_bit_mask((unsigned long)x))
 /*
  * Macro's to find first set bit in a variable.
  * These macro's behaves the same as the __ffs() function with
-- 
1.5.6.rc1.5.gadf6


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