1 Jul
2009
1 Jul
'09
6:57 p.m.
-----Original Message----- From: u-boot-bounces@lists.denx.de [mailto:u-boot-bounces@lists.denx.de] On Behalf Of Simon Kagstrom Sent: Wednesday, July 01, 2009 8:46 PM To: U-Boot ML Subject: [U-Boot] [PATCH] arm: Kirkwood: Add memory barriers to kwgbe_send/recv
Add memory barriers to kwgbe_send/recv
kwgbe_send/recv both have loops waiting for the hardware to set a bit. GCC 4.3.3 cleverly optimizes this to ... a while(1); loop.
Struct used is defined as volatile here. Is this not sufficient?
Regards.. Prafulla . .
This patch introduces memory barriers to force re-loading of the transmit descriptor.
mb() wasn't defined for arm, but perhaps it should?