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| author | Maciej W. Rozycki <macro@linux-mips.org> | 2015-05-27 14:15:20 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2015-06-21 21:52:41 +0200 |
| commit | 9a20b09285bbd75ccc2ca78233241f8e31d54a28 (patch) | |
| tree | f18914b5a7e902428a14a9b58025d64ff950d64e | |
| parent | 3bcb03f3a7160e411c5f335028a5c70b32f0edb7 (diff) | |
| download | linux-stable-9a20b09285bbd75ccc2ca78233241f8e31d54a28.tar.gz linux-stable-9a20b09285bbd75ccc2ca78233241f8e31d54a28.tar.bz2 linux-stable-9a20b09285bbd75ccc2ca78233241f8e31d54a28.zip | |
MIPS: tlb-r3k: Optimise a TLBWI barrier in TLB invalidation
Replace an explicit barrier with a useful processor instruction in TLB
invalidation, following several other such cases elsewhere in
`tlb-r3k.c'.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/10196/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| -rw-r--r-- | arch/mips/mm/tlb-r3k.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/mips/mm/tlb-r3k.c b/arch/mips/mm/tlb-r3k.c index 49b7132069d0..2b75b8f880ed 100644 --- a/arch/mips/mm/tlb-r3k.c +++ b/arch/mips/mm/tlb-r3k.c @@ -45,10 +45,10 @@ static void local_flush_tlb_from(int entry) old_ctx = read_c0_entryhi() & ASID_MASK; write_c0_entrylo0(0); - for (; entry < current_cpu_data.tlbsize; entry++) { + while (entry < current_cpu_data.tlbsize) { write_c0_index(entry << 8); write_c0_entryhi((entry | 0x80000) << 12); - BARRIER; + entry++; /* BARRIER */ tlb_write_indexed(); } write_c0_entryhi(old_ctx); |