[PATCH] powerpc: Convert mmu context allocator from idr to ida
From: Anton Blanchard <hidden>
Date: 2010-02-07 22:30:12
We can use the much more lightweight ida allocator since we don't need the pointer storage idr provides. Signed-off-by: Anton Blanchard <redacted> --- Index: powerpc.git/arch/powerpc/mm/mmu_context_hash64.c ===================================================================
--- powerpc.git.orig/arch/powerpc/mm/mmu_context_hash64.c 2010-02-05 14:57:48.399712677 +1100
+++ powerpc.git/arch/powerpc/mm/mmu_context_hash64.c 2010-02-05 14:57:55.938461799 +1100@@ -23,7 +23,7 @@ #include <asm/mmu_context.h> static DEFINE_SPINLOCK(mmu_context_lock); -static DEFINE_IDR(mmu_context_idr); +static DEFINE_IDA(mmu_context_ida); /* * The proto-VSID space has 2^35 - 1 segments available for user mappings.
@@ -39,11 +39,11 @@ int __init_new_context(void) int err; again: - if (!idr_pre_get(&mmu_context_idr, GFP_KERNEL)) + if (!ida_pre_get(&mmu_context_ida, GFP_KERNEL)) return -ENOMEM; spin_lock(&mmu_context_lock); - err = idr_get_new_above(&mmu_context_idr, NULL, 1, &index); + err = ida_get_new_above(&mmu_context_ida, 1, &index); spin_unlock(&mmu_context_lock); if (err == -EAGAIN)
@@ -53,7 +53,7 @@ again: if (index > MAX_CONTEXT) { spin_lock(&mmu_context_lock); - idr_remove(&mmu_context_idr, index); + ida_remove(&mmu_context_ida, index); spin_unlock(&mmu_context_lock); return -ENOMEM; }
@@ -85,7 +85,7 @@ int init_new_context(struct task_struct void __destroy_context(int context_id) { spin_lock(&mmu_context_lock); - idr_remove(&mmu_context_idr, context_id); + ida_remove(&mmu_context_ida, context_id); spin_unlock(&mmu_context_lock); } EXPORT_SYMBOL_GPL(__destroy_context);