X-Git-Url: http://git.ipfire.org/?a=blobdiff_plain;f=drivers%2Fstaging%2Fandroid%2Fion%2Fion_page_pool.c;fp=drivers%2Fstaging%2Fandroid%2Fion%2Fion_page_pool.c;h=0000000000000000000000000000000000000000;hb=e722a295cf493388dae474745d30e91e1a2ec549;hp=0198b886d906aa81cefa51d9f59bbd08333bdfc6;hpb=3650b228f83adda7e5ee532e2b90429c03f7b9ec;p=thirdparty%2Fkernel%2Flinux.git

diff --git a/drivers/staging/android/ion/ion_page_pool.c b/drivers/staging/android/ion/ion_page_pool.c
deleted file mode 100644
index 0198b886d906a..0000000000000
--- a/drivers/staging/android/ion/ion_page_pool.c
+++ /dev/null
@@ -1,155 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * ION Memory Allocator page pool helpers
- *
- * Copyright (C) 2011 Google, Inc.
- */
-
-#include <linux/list.h>
-#include <linux/slab.h>
-#include <linux/swap.h>
-#include <linux/sched/signal.h>
-
-#include "ion.h"
-
-static inline struct page *ion_page_pool_alloc_pages(struct ion_page_pool *pool)
-{
-	if (fatal_signal_pending(current))
-		return NULL;
-	return alloc_pages(pool->gfp_mask, pool->order);
-}
-
-static void ion_page_pool_free_pages(struct ion_page_pool *pool,
-				     struct page *page)
-{
-	__free_pages(page, pool->order);
-}
-
-static void ion_page_pool_add(struct ion_page_pool *pool, struct page *page)
-{
-	mutex_lock(&pool->mutex);
-	if (PageHighMem(page)) {
-		list_add_tail(&page->lru, &pool->high_items);
-		pool->high_count++;
-	} else {
-		list_add_tail(&page->lru, &pool->low_items);
-		pool->low_count++;
-	}
-
-	mod_node_page_state(page_pgdat(page), NR_KERNEL_MISC_RECLAIMABLE,
-			    1 << pool->order);
-	mutex_unlock(&pool->mutex);
-}
-
-static struct page *ion_page_pool_remove(struct ion_page_pool *pool, bool high)
-{
-	struct page *page;
-
-	if (high) {
-		BUG_ON(!pool->high_count);
-		page = list_first_entry(&pool->high_items, struct page, lru);
-		pool->high_count--;
-	} else {
-		BUG_ON(!pool->low_count);
-		page = list_first_entry(&pool->low_items, struct page, lru);
-		pool->low_count--;
-	}
-
-	list_del(&page->lru);
-	mod_node_page_state(page_pgdat(page), NR_KERNEL_MISC_RECLAIMABLE,
-			    -(1 << pool->order));
-	return page;
-}
-
-struct page *ion_page_pool_alloc(struct ion_page_pool *pool)
-{
-	struct page *page = NULL;
-
-	BUG_ON(!pool);
-
-	mutex_lock(&pool->mutex);
-	if (pool->high_count)
-		page = ion_page_pool_remove(pool, true);
-	else if (pool->low_count)
-		page = ion_page_pool_remove(pool, false);
-	mutex_unlock(&pool->mutex);
-
-	if (!page)
-		page = ion_page_pool_alloc_pages(pool);
-
-	return page;
-}
-
-void ion_page_pool_free(struct ion_page_pool *pool, struct page *page)
-{
-	BUG_ON(pool->order != compound_order(page));
-
-	ion_page_pool_add(pool, page);
-}
-
-static int ion_page_pool_total(struct ion_page_pool *pool, bool high)
-{
-	int count = pool->low_count;
-
-	if (high)
-		count += pool->high_count;
-
-	return count << pool->order;
-}
-
-int ion_page_pool_shrink(struct ion_page_pool *pool, gfp_t gfp_mask,
-			 int nr_to_scan)
-{
-	int freed = 0;
-	bool high;
-
-	if (current_is_kswapd())
-		high = true;
-	else
-		high = !!(gfp_mask & __GFP_HIGHMEM);
-
-	if (nr_to_scan == 0)
-		return ion_page_pool_total(pool, high);
-
-	while (freed < nr_to_scan) {
-		struct page *page;
-
-		mutex_lock(&pool->mutex);
-		if (pool->low_count) {
-			page = ion_page_pool_remove(pool, false);
-		} else if (high && pool->high_count) {
-			page = ion_page_pool_remove(pool, true);
-		} else {
-			mutex_unlock(&pool->mutex);
-			break;
-		}
-		mutex_unlock(&pool->mutex);
-		ion_page_pool_free_pages(pool, page);
-		freed += (1 << pool->order);
-	}
-
-	return freed;
-}
-
-struct ion_page_pool *ion_page_pool_create(gfp_t gfp_mask, unsigned int order)
-{
-	struct ion_page_pool *pool = kmalloc(sizeof(*pool), GFP_KERNEL);
-
-	if (!pool)
-		return NULL;
-	pool->high_count = 0;
-	pool->low_count = 0;
-	INIT_LIST_HEAD(&pool->low_items);
-	INIT_LIST_HEAD(&pool->high_items);
-	pool->gfp_mask = gfp_mask | __GFP_COMP;
-	pool->order = order;
-	mutex_init(&pool->mutex);
-	plist_node_init(&pool->list, order);
-
-	return pool;
-}
-
-void ion_page_pool_destroy(struct ion_page_pool *pool)
-{
-	kfree(pool);
-}