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Subject[PATCH] arm64: mm: Use asid2idx() and asid feature macro for cleanup
Date
Use asid2idx() and asid feature macro for cleanup.

No functional change.

Signed-off-by: Yunfeng Ye <yeyunfeng@huawei.com>
---
arch/arm64/mm/context.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/mm/context.c b/arch/arm64/mm/context.c
index cd72576ae2b7..076f14a75bd5 100644
--- a/arch/arm64/mm/context.c
+++ b/arch/arm64/mm/context.c
@@ -50,10 +50,10 @@ static u32 get_cpu_asid_bits(void)
pr_warn("CPU%d: Unknown ASID size (%d); assuming 8-bit\n",
smp_processor_id(), fld);
fallthrough;
- case 0:
+ case ID_AA64MMFR0_ASID_8:
asid = 8;
break;
- case 2:
+ case ID_AA64MMFR0_ASID_16:
asid = 16;
}

@@ -162,7 +162,7 @@ static u64 new_context(struct mm_struct *mm)
u64 generation = atomic64_read(&asid_generation);

if (asid != 0) {
- u64 newasid = generation | (asid & ~ASID_MASK);
+ u64 newasid = generation | asid2idx(asid);

/*
* If our current ASID was active during a rollover, we
@@ -306,7 +306,7 @@ unsigned long arm64_mm_context_get(struct mm_struct *mm)
out_unlock:
raw_spin_unlock_irqrestore(&cpu_asid_lock, flags);

- asid &= ~ASID_MASK;
+ asid = asid2idx(asid);

/* Set the equivalent of USER_ASID_BIT */
if (asid && arm64_kernel_unmapped_at_el0())
--
2.27.0
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