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MIPS: mm: Consolidate drop_mmu_context() has-ASID checks

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If an mm does not have an ASID on the local CPU then drop_mmu_context()
is always redundant, since there's no context to "drop". Various callers
of drop_mmu_context() check whether the mm has been allocated an ASID
before making the call. Move that check into drop_mmu_context() and
remove it from callers to simplify them.

Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: linux-mips@vger.kernel.org
This commit is contained in:
Paul Burton
2019-02-02 01:43:19 +00:00
parent 67741ba3ba
commit c9b2a3dc24
5 changed files with 10 additions and 22 deletions
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4
arch/mips/include/asm/mmu_context.h
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@@ -186,7 +186,9 @@ drop_mmu_context(struct mm_struct *mm)
local_irq_save(flags);
cpu = smp_processor_id();
if (cpumask_test_cpu(cpu, mm_cpumask(mm))) {
if (!cpu_context(cpu, mm)) {
/* no-op */
} else if (cpumask_test_cpu(cpu, mm_cpumask(mm))) {
htw_stop();
get_new_mmu_context(mm);
write_c0_entryhi(cpu_asid(cpu, mm));