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| author | Vineet Gupta <vgupta@synopsys.com> | 2013-09-27 16:50:06 +0400 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2013-11-06 09:11:41 +0400 |
| commit | 0a4c40a3b702730c8b1ad0952e6501e84fadd395 (patch) | |
| tree | 13a1b5cf43a2ba4bb1aa43b944c91367200b20d2 | |
| parent | 0dafafc3ef42bad34fd446725cb9778c3bdd83a8 (diff) | |
| download | linux-0a4c40a3b702730c8b1ad0952e6501e84fadd395.tar.xz | |
ARC: Fix bogus gcc warning and micro-optimise TLB iteration loop
------------------>8----------------------
arch/arc/mm/tlb.c: In function ‘do_tlb_overlap_fault’:
arch/arc/mm/tlb.c:688:13: warning: array subscript is above array bounds
[-Warray-bounds]
(pd0[n] & PAGE_MASK)) {
^
------------------>8----------------------
While at it, remove the usless last iteration of outer loop when reading
a TLB SET for duplicate entries.
Suggested-by: Mischa Jonker <mjonker@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
| -rw-r--r-- | arch/arc/mm/tlb.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arc/mm/tlb.c b/arch/arc/mm/tlb.c index 71cb26df4255..5f53050abf60 100644 --- a/arch/arc/mm/tlb.c +++ b/arch/arc/mm/tlb.c @@ -610,9 +610,9 @@ void do_tlb_overlap_fault(unsigned long cause, unsigned long address, struct pt_regs *regs) { int set, way, n; - unsigned int pd0[4], pd1[4]; /* assume max 4 ways */ unsigned long flags, is_valid; struct cpuinfo_arc_mmu *mmu = &cpuinfo_arc700[smp_processor_id()].mmu; + unsigned int pd0[mmu->ways], pd1[mmu->ways]; local_irq_save(flags); @@ -637,7 +637,7 @@ void do_tlb_overlap_fault(unsigned long cause, unsigned long address, continue; /* Scan the set for duplicate ways: needs a nested loop */ - for (way = 0; way < mmu->ways; way++) { + for (way = 0; way < mmu->ways - 1; way++) { if (!pd0[way]) continue; |