Hello, We've been experiencing some problems with our RM7k cache code which is based on the sgi mm/rm7k.c from around kernel version 2.4.2. While trying to track this down, we noticed that someone added a call to flush_icache_line() in the rm7k_dma_cache_*() routines (now mm/c-rm7k.c). What is the reason for this? It is our understanding that the instruction cache does not write back, and so stale cache lines in the icache which are later used for data/dma would seem innocuous. Is this not true? We could not find a CVS log entry to explain this, either. Did anyone experience problems without these calls to flush_icache_line()? Thanks, Will
