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authorRalf Baechle <ralf@linux-mips.org>2006-11-30 01:14:48 +0000
committerRalf Baechle <ralf@linux-mips.org>2006-11-30 01:14:48 +0000
commit617667ba724d46ffeccb88ee99e1379f29b0bfa7 (patch)
tree9a0ffd3f88a2c5fe063ef45d83d52552e51411a7
parent0550d9d13e02b30efa117d47fcadea450bb23d23 (diff)
[MIPS] Avoid dupliate D-cache flush on R400C / R4400 SC and MC variants.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
-rw-r--r--arch/mips/mm/c-r4k.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index 0138cb2e456..df04a315d83 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)