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ARC: fix build warnings

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| arch/arc/mm/tlb.c:914:2: warning: variable length array 'pd0' is used [-Wvla]
| arch/arc/include/asm/cmpxchg.h:95:29: warning: value computed is not used [-Wunused-value]

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Vineet Gupta
2019-05-07 10:45:24 -07:00
parent a188339ca5
commit 89c92142f7
2 changed files with 18 additions and 9 deletions
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13
arch/arc/mm/tlb.c
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@@ -911,9 +911,11 @@ void do_tlb_overlap_fault(unsigned long cause, unsigned long address,
struct pt_regs *regs)
{
struct cpuinfo_arc_mmu *mmu = &cpuinfo_arc700[smp_processor_id()].mmu;
unsigned int pd0[mmu->ways];
unsigned long flags;
int set;
int set, n_ways = mmu->ways;
n_ways = min(n_ways, 4);
BUG_ON(mmu->ways > 4);
local_irq_save(flags);
@@ -921,9 +923,10 @@ void do_tlb_overlap_fault(unsigned long cause, unsigned long address,
for (set = 0; set < mmu->sets; set++) {
int is_valid, way;
unsigned int pd0[4];
/* read out all the ways of current set */
for (way = 0, is_valid = 0; way < mmu->ways; way++) {
for (way = 0, is_valid = 0; way < n_ways; way++) {
write_aux_reg(ARC_REG_TLBINDEX,
SET_WAY_TO_IDX(mmu, set, way));
write_aux_reg(ARC_REG_TLBCOMMAND, TLBRead);
@@ -937,14 +940,14 @@ 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 - 1; way++) {
for (way = 0; way < n_ways - 1; way++) {
int n;
if (!pd0[way])
continue;
for (n = way + 1; n < mmu->ways; n++) {
for (n = way + 1; n < n_ways; n++) {
if (pd0[way] != pd0[n])
continue;