[PATCH 03/15] batman-adv: add biggest_unsigned_int(x) macro

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

in case of dynamic type variable, it could be needed to compute at compile time
its maximal value. This macro helps in doing that for unsigned integer types

Signed-off-by: Antonio Quartulli <ordex@xxxxxxxxxxxxx>
---
 net/batman-adv/main.h |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h
index a2b18d0..d9ef4ca 100644
--- a/net/batman-adv/main.h
+++ b/net/batman-adv/main.h
@@ -221,6 +221,9 @@ static inline bool has_timed_out(unsigned long timestamp, unsigned int timeout)
 /* Returns the smallest signed integer in two's complement with the sizeof x */
 #define smallest_signed_int(x) (1u << (7u + 8u * (sizeof(x) - 1u)))
 
+/* Returns the biggest unsigned integer with the sizeof x */
+#define biggest_unsigned_int(x) (~(x)0)
+
 /* Checks if a sequence number x is a predecessor/successor of y.
  * they handle overflows/underflows and can correctly check for a
  * predecessor/successor unless the variable sequence number has grown by
-- 
1.7.9.4

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Linux Kernel Discussion]     [Ethernet Bridging]     [Linux Wireless Networking]     [Linux Bluetooth Networking]     [Linux Networking Users]     [VLAN]     [Git]     [IETF Annouce]     [Linux Assembly]     [Security]     [Bugtraq]     [Photo]     [Singles Social Networking]     [Yosemite Information]     [MIPS Linux]     [ARM Linux Kernel]     [ARM Linux]     [Linux Virtualization]     [Linux Security]     [Linux IDE]     [Linux RAID]     [Linux SCSI]     [Free Dating]

Add to Google Powered by Linux