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MIPS: c-r4k: Avoid dcache flush for sigtramps

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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>
This commit is contained in:
James Hogan 2016-07-13 14:12:49 +01:00 committed by Ralf Baechle
parent e523f289fe
commit 8bd646e92b
1 changed files with 10 additions and 6 deletions
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16
arch/mips/mm/c-r4k.c
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@ -841,12 +841,16 @@ static void local_r4k_flush_cache_sigtramp(void *args)
}
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));