From 617667ba724d46ffeccb88ee99e1379f29b0bfa7 Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Thu, 30 Nov 2006 01:14:48 +0000 Subject: [PATCH] [MIPS] Avoid dupliate D-cache flush on R400C / R4400 SC and MC variants. Signed-off-by: Ralf Baechle --- arch/mips/mm/c-r4k.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c index 0138cb2e45..df04a315d8 100644 --- a/arch/mips/mm/c-r4k.c +++ b/arch/mips/mm/c-r4k.c @@ -381,17 +381,21 @@ static inline void local_r4k_flush_cache_mm(void * args) if (!cpu_context(smp_processor_id(), mm)) return; - r4k_blast_dcache(); - /* * Kludge alert. For obscure reasons R4000SC and R4400SC go nuts if we * only flush the primary caches but R10000 and R12000 behave sane ... + * R4000SC and R4400SC indexed S-cache ops also invalidate primary + * caches, so we can bail out early. */ 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) + current_cpu_data.cputype == CPU_R4400MC) { r4k_blast_scache(); + return; + } + + r4k_blast_dcache(); } static void r4k_flush_cache_mm(struct mm_struct *mm) -- 2.39.5