Spidernet Memory barrier
Add memory barrier to make sure that the rest of the RX descriptor state is flushed to memory before we tell the hardware that its ready to go. Signed-off-by: NLinas Vepstas <linas@austin.ibm.com> Cc: James K Lewis <jklewis@us.ibm.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: NJeff Garzik <jeff@garzik.org>
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