netloop: speed up NetLoop

NetLoop polls every cycle with getenv some environment variables.
This is horribly slow, especially when the environment is big.

This patch reads only the environment variables in NetLoop,
when they were changed.

Also moved the init part of the NetLoop function in a seperate
function.

Signed-off-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/common.h b/include/common.h
index afee1889a..b75ea60b8 100644
--- a/include/common.h
+++ b/include/common.h
@@ -269,6 +269,7 @@ void	forceenv     (char *, char *);
 #ifdef CONFIG_AUTO_COMPLETE
 int env_complete(char *var, int maxv, char *cmdv[], int maxsz, char *buf);
 #endif
+int get_env_id (void);
 
 void	pci_init      (void);
 void	pci_init_board(void);