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| author |   Paul Burton <paul.burton@mips.com> | 2019-02-02 01:43:19 +0000 |
|---|---|---|
| committer | Paul Burton <paul.burton@mips.com> | 2019-02-04 10:56:18 -0800 |
| commit | c9b2a3dc240c444b4f7b556e2cce756828720856 (patch) | |
| tree | 973ec0ea4be746b49f52f03c1f7d8244bcd0cb80 /arch/mips/include | |
| parent | MIPS: mm: Avoid HTW stop/start when dropping an inactive mm (diff) | |
| download | linux-dev-c9b2a3dc240c444b4f7b556e2cce756828720856.tar.xz linux-dev-c9b2a3dc240c444b4f7b556e2cce756828720856.zip | |
MIPS: mm: Consolidate drop_mmu_context() has-ASID checks
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
Diffstat (limited to 'arch/mips/include')
| -rw-r--r-- | arch/mips/include/asm/mmu_context.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/mips/include/asm/mmu_context.h b/arch/mips/include/asm/mmu_context.h index 5d0a73a5cf40..1b8392dcd354 100644 --- a/arch/mips/include/asm/mmu_context.h +++ b/arch/mips/include/asm/mmu_context.h @@ -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)); |