powerpc: Convert mmu context allocator from idr to ida
We can use the much more lightweight ida allocator since we don't need the pointer storage idr provides. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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@ -23,7 +23,7 @@
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#include <asm/mmu_context.h>
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#include <asm/mmu_context.h>
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static DEFINE_SPINLOCK(mmu_context_lock);
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static DEFINE_SPINLOCK(mmu_context_lock);
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static DEFINE_IDR(mmu_context_idr);
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static DEFINE_IDA(mmu_context_ida);
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/*
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/*
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* The proto-VSID space has 2^35 - 1 segments available for user mappings.
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* The proto-VSID space has 2^35 - 1 segments available for user mappings.
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@ -39,11 +39,11 @@ int __init_new_context(void)
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int err;
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int err;
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again:
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again:
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if (!idr_pre_get(&mmu_context_idr, GFP_KERNEL))
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if (!ida_pre_get(&mmu_context_ida, GFP_KERNEL))
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return -ENOMEM;
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return -ENOMEM;
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spin_lock(&mmu_context_lock);
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spin_lock(&mmu_context_lock);
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err = idr_get_new_above(&mmu_context_idr, NULL, 1, &index);
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err = ida_get_new_above(&mmu_context_ida, 1, &index);
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spin_unlock(&mmu_context_lock);
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spin_unlock(&mmu_context_lock);
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if (err == -EAGAIN)
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if (err == -EAGAIN)
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@ -53,7 +53,7 @@ again:
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if (index > MAX_CONTEXT) {
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if (index > MAX_CONTEXT) {
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spin_lock(&mmu_context_lock);
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spin_lock(&mmu_context_lock);
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idr_remove(&mmu_context_idr, index);
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ida_remove(&mmu_context_ida, index);
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spin_unlock(&mmu_context_lock);
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spin_unlock(&mmu_context_lock);
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return -ENOMEM;
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return -ENOMEM;
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}
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}
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@ -85,7 +85,7 @@ int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
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void __destroy_context(int context_id)
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void __destroy_context(int context_id)
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{
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{
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spin_lock(&mmu_context_lock);
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spin_lock(&mmu_context_lock);
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idr_remove(&mmu_context_idr, context_id);
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ida_remove(&mmu_context_ida, context_id);
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spin_unlock(&mmu_context_lock);
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spin_unlock(&mmu_context_lock);
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}
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}
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EXPORT_SYMBOL_GPL(__destroy_context);
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EXPORT_SYMBOL_GPL(__destroy_context);
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