[linux-next] LinuxNextTracking branch, master, updated. next-20110624

batman at open-mesh.org batman at open-mesh.org
Fri Jun 24 16:09:44 CEST 2011


The following commit has been merged in the master branch:
commit f5d33d37786af139cecde5af831d64a671bb756b
Author: Antonio Quartulli <ordex at autistici.org>
Date:   Wed May 18 09:20:50 2011 +0200

    batman-adv: move smallest_signed_int(), seq_before() and seq_after() into main.h
    
    smallest_signed_int(), seq_before() and seq_after() are very useful
    functions that help to handle comparisons between sequence numbers.
    However they were only defined in vis.c. With this patch every
    batman-adv function will be able to use them.
    
    Signed-off-by: Antonio Quartulli <ordex at autistici.org>
    Signed-off-by: Sven Eckelmann <sven at narfation.org>

diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h
index 0150897a..80be5ad 100644
--- a/net/batman-adv/main.h
+++ b/net/batman-adv/main.h
@@ -182,4 +182,20 @@ static inline int compare_eth(const void *data1, const void *data2)
 
 #define atomic_dec_not_zero(v)	atomic_add_unless((v), -1, 0)
 
+/* Returns the smallest signed integer in two's complement with the sizeof x */
+#define smallest_signed_int(x) (1u << (7u + 8u * (sizeof(x) - 1u)))
+
+/* 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
+ * more then 2**(bitwidth(x)-1)-1.
+ * This means that for a uint8_t with the maximum value 255, it would think:
+ *  - when adding nothing - it is neither a predecessor nor a successor
+ *  - before adding more than 127 to the starting value - it is a predecessor,
+ *  - when adding 128 - it is neither a predecessor nor a successor,
+ *  - after adding more than 127 to the starting value - it is a successor */
+#define seq_before(x, y) ({typeof(x) _dummy = (x - y); \
+			_dummy > smallest_signed_int(_dummy); })
+#define seq_after(x, y) seq_before(y, x)
+
 #endif /* _NET_BATMAN_ADV_MAIN_H_ */
diff --git a/net/batman-adv/vis.c b/net/batman-adv/vis.c
index ea8d7e9..355c6e5 100644
--- a/net/batman-adv/vis.c
+++ b/net/batman-adv/vis.c
@@ -30,22 +30,6 @@
 
 #define MAX_VIS_PACKET_SIZE 1000
 
-/* Returns the smallest signed integer in two's complement with the sizeof x */
-#define smallest_signed_int(x) (1u << (7u + 8u * (sizeof(x) - 1u)))
-
-/* 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
- * more then 2**(bitwidth(x)-1)-1.
- * This means that for a uint8_t with the maximum value 255, it would think:
- *  - when adding nothing - it is neither a predecessor nor a successor
- *  - before adding more than 127 to the starting value - it is a predecessor,
- *  - when adding 128 - it is neither a predecessor nor a successor,
- *  - after adding more than 127 to the starting value - it is a successor */
-#define seq_before(x, y) ({typeof(x) _dummy = (x - y); \
-			_dummy > smallest_signed_int(_dummy); })
-#define seq_after(x, y) seq_before(y, x)
-
 static void start_vis_timer(struct bat_priv *bat_priv);
 
 /* free the info */

-- 
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