MIPS: c-r4k: Avoid dcache flush for sigtramps
Avoid the dcache and scache flush in local_r4k_flush_cache_sigtramp() if
the icache fills straight from the dcache.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13802/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index 600b0ad..58b810e 100644
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -841,12 +841,16 @@
}
R4600_HIT_CACHEOP_WAR_IMPL;
- if (dc_lsize)
- vaddr ? flush_dcache_line(addr & ~(dc_lsize - 1))
- : protected_writeback_dcache_line(addr & ~(dc_lsize - 1));
- if (!cpu_icache_snoops_remote_store && scache_size)
- vaddr ? flush_scache_line(addr & ~(sc_lsize - 1))
- : protected_writeback_scache_line(addr & ~(sc_lsize - 1));
+ if (!cpu_has_ic_fills_f_dc) {
+ if (dc_lsize)
+ vaddr ? flush_dcache_line(addr & ~(dc_lsize - 1))
+ : protected_writeback_dcache_line(
+ addr & ~(dc_lsize - 1));
+ if (!cpu_icache_snoops_remote_store && scache_size)
+ vaddr ? flush_scache_line(addr & ~(sc_lsize - 1))
+ : protected_writeback_scache_line(
+ addr & ~(sc_lsize - 1));
+ }
if (ic_lsize)
vaddr ? flush_icache_line(addr & ~(ic_lsize - 1))
: protected_flush_icache_line(addr & ~(ic_lsize - 1));
