powerpc/mm: Rename mmu_context_hash64.c to mmu_context_book3s64.c

This file now contains both hash and radix specific code. Rename it to
indicate this better.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

1 files changed, 0 insertions, 178 deletions

diff --git a/arch/powerpc/mm/mmu_context_hash64.c b/arch/powerpc/mm/mmu_context_hash64.c
deleted file mode 100644
index b5288b460bef..000000000000
--- a/arch/powerpc/mm/mmu_context_hash64.c
+++ /dev/null
@@ -1,178 +0,0 @@
-/*
- *  MMU context allocation for 64-bit kernels.
- *
- *  Copyright (C) 2004 Anton Blanchard, IBM Corp. <anton@samba.org>
- *
- *  This program is free software; you can redistribute it and/or
- *  modify it under the terms of the GNU General Public License
- *  as published by the Free Software Foundation; either version
- *  2 of the License, or (at your option) any later version.
- *
- */
-
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/mm.h>
-#include <linux/spinlock.h>
-#include <linux/idr.h>
-#include <linux/export.h>
-#include <linux/gfp.h>
-#include <linux/slab.h>
-
-#include <asm/mmu_context.h>
-#include <asm/pgalloc.h>
-
-#include "icswx.h"
-
-static DEFINE_SPINLOCK(mmu_context_lock);
-static DEFINE_IDA(mmu_context_ida);
-
-int __init_new_context(void)
-{
-	int index;
-	int err;
-
-again:
-	if (!ida_pre_get(&mmu_context_ida, GFP_KERNEL))
-		return -ENOMEM;
-
-	spin_lock(&mmu_context_lock);
-	err = ida_get_new_above(&mmu_context_ida, 1, &index);
-	spin_unlock(&mmu_context_lock);
-
-	if (err == -EAGAIN)
-		goto again;
-	else if (err)
-		return err;
-
-	if (index > MAX_USER_CONTEXT) {
-		spin_lock(&mmu_context_lock);
-		ida_remove(&mmu_context_ida, index);
-		spin_unlock(&mmu_context_lock);
-		return -ENOMEM;
-	}
-
-	return index;
-}
-EXPORT_SYMBOL_GPL(__init_new_context);
-static int radix__init_new_context(struct mm_struct *mm, int index)
-{
-	unsigned long rts_field;
-
-	/*
-	 * set the process table entry,
-	 */
-	rts_field = 3ull << PPC_BITLSHIFT(2);
-	process_tb[index].prtb0 = cpu_to_be64(rts_field | __pa(mm->pgd) | RADIX_PGD_INDEX_SIZE);
-	return 0;
-}
-
-int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
-{
-	int index;
-
-	index = __init_new_context();
-	if (index < 0)
-		return index;
-
-	if (radix_enabled()) {
-		radix__init_new_context(mm, index);
-	} else {
-
-		/* The old code would re-promote on fork, we don't do that
-		 * when using slices as it could cause problem promoting slices
-		 * that have been forced down to 4K
-		 */
-		if (slice_mm_new_context(mm))
-			slice_set_user_psize(mm, mmu_virtual_psize);
-		subpage_prot_init_new_context(mm);
-	}
-	mm->context.id = index;
-#ifdef CONFIG_PPC_ICSWX
-	mm->context.cop_lockp = kmalloc(sizeof(spinlock_t), GFP_KERNEL);
-	if (!mm->context.cop_lockp) {
-		__destroy_context(index);
-		subpage_prot_free(mm);
-		mm->context.id = MMU_NO_CONTEXT;
-		return -ENOMEM;
-	}
-	spin_lock_init(mm->context.cop_lockp);
-#endif /* CONFIG_PPC_ICSWX */
-
-#ifdef CONFIG_PPC_64K_PAGES
-	mm->context.pte_frag = NULL;
-#endif
-#ifdef CONFIG_SPAPR_TCE_IOMMU
-	mm_iommu_init(&mm->context);
-#endif
-	return 0;
-}
-
-void __destroy_context(int context_id)
-{
-	spin_lock(&mmu_context_lock);
-	ida_remove(&mmu_context_ida, context_id);
-	spin_unlock(&mmu_context_lock);
-}
-EXPORT_SYMBOL_GPL(__destroy_context);
-
-#ifdef CONFIG_PPC_64K_PAGES
-static void destroy_pagetable_page(struct mm_struct *mm)
-{
-	int count;
-	void *pte_frag;
-	struct page *page;
-
-	pte_frag = mm->context.pte_frag;
-	if (!pte_frag)
-		return;
-
-	page = virt_to_page(pte_frag);
-	/* drop all the pending references */
-	count = ((unsigned long)pte_frag & ~PAGE_MASK) >> PTE_FRAG_SIZE_SHIFT;
-	/* We allow PTE_FRAG_NR fragments from a PTE page */
-	if (page_ref_sub_and_test(page, PTE_FRAG_NR - count)) {
-		pgtable_page_dtor(page);
-		free_hot_cold_page(page, 0);
-	}
-}
-
-#else
-static inline void destroy_pagetable_page(struct mm_struct *mm)
-{
-	return;
-}
-#endif
-
-
-void destroy_context(struct mm_struct *mm)
-{
-#ifdef CONFIG_SPAPR_TCE_IOMMU
-	mm_iommu_cleanup(&mm->context);
-#endif
-
-#ifdef CONFIG_PPC_ICSWX
-	drop_cop(mm->context.acop, mm);
-	kfree(mm->context.cop_lockp);
-	mm->context.cop_lockp = NULL;
-#endif /* CONFIG_PPC_ICSWX */
-
-	if (radix_enabled())
-		process_tb[mm->context.id].prtb1 = 0;
-	else
-		subpage_prot_free(mm);
-	destroy_pagetable_page(mm);
-	__destroy_context(mm->context.id);
-	mm->context.id = MMU_NO_CONTEXT;
-}
-
-#ifdef CONFIG_PPC_RADIX_MMU
-void radix__switch_mmu_context(struct mm_struct *prev, struct mm_struct *next)
-{
-	mtspr(SPRN_PID, next->context.id);
-	asm volatile("isync": : :"memory");
-}
-#endif