We still have this stuff in flush_cache_mm():
/*
* Kludge alert. For obscure reasons R4000SC and R4400SC go nuts if we
* only flush the primary caches but R10000 and R12000 behave sane ...
*/
if (current_cpu_data.cputype == CPU_R4000SC ||
current_cpu_data.cputype == CPU_R4000MC ||
current_cpu_data.cputype == CPU_R4400SC ||
current_cpu_data.cputype == CPU_R4400MC)
r4k_blast_scache();
You have any idea what might make this necessary? This slows down
SC systems quite badly but makes the compiler from eleminating the
call to r4k_blast_scache() on systems that don't have one of these
processors.
Could be kludged a bit by also testing cpu_has_subset_pcaches() but
that'd be a hack.
Ralf
