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ion: remove ion_heap_alloc_pages 

Now that ion_vm_fault doesn't need a struct page with a nonzero
refcount, there is no need allocate heap memory for cached pages using
split_page.  Remove the ion_heap_alloc_pages and ion_heap_free_pages
helpers in favor of direct calls to alloc_pages and __free_pages,
and remove the special handling in the system heap.

Signed-off-by: Colin Cross <ccross@android.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Colin Cross 2013-12-13 19:26:25 -08:00 committed by Greg Kroah-Hartman
parent 462be0c616
commit a3056906bf
3 changed files with 1 additions and 46 deletions
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27
drivers/staging/android/ion/ion_heap.c
View File

@ -148,33 +148,6 @@ int ion_heap_buffer_zero(struct ion_buffer *buffer)
return ret;
}
struct page *ion_heap_alloc_pages(struct ion_buffer *buffer, gfp_t gfp_flags,
unsigned int order)
{
struct page *page = alloc_pages(gfp_flags, order);
if (!page)
return page;
if (ion_buffer_fault_user_mappings(buffer))
split_page(page, order);
return page;
}
void ion_heap_free_pages(struct ion_buffer *buffer, struct page *page,
unsigned int order)
{
int i;
if (!ion_buffer_fault_user_mappings(buffer)) {
__free_pages(page, order);
return;
}
for (i = 0; i < (1 << order); i++)
__free_page(page + i);
}
void ion_heap_freelist_add(struct ion_heap *heap, struct ion_buffer * buffer)
{
rt_mutex_lock(&heap->lock);

13
drivers/staging/android/ion/ion_priv.h
View File

@ -216,19 +216,6 @@ int ion_heap_map_user(struct ion_heap *, struct ion_buffer *,
struct vm_area_struct *);
int ion_heap_buffer_zero(struct ion_buffer *buffer);
/**
* ion_heap_alloc_pages - allocate pages from alloc_pages
* @buffer: the buffer to allocate for, used to extract the flags
* @gfp_flags: the gfp_t for the allocation
* @order: the order of the allocatoin
*
* This funciton allocations from alloc pages and also does any other
* necessary operations based on the buffer->flags. For buffers which
* will be faulted in the pages are split using split_page
*/
struct page *ion_heap_alloc_pages(struct ion_buffer *buffer, gfp_t gfp_flags,
unsigned int order);
/**
* ion_heap_init_deferred_free -- initialize deferred free functionality
* @heap: the heap

7
drivers/staging/android/ion/ion_system_heap.c
View File

@ -74,7 +74,7 @@ static struct page *alloc_buffer_page(struct ion_system_heap *heap,
if (order > 4)
gfp_flags = high_order_gfp_flags;
page = ion_heap_alloc_pages(buffer, gfp_flags, order);
page = alloc_pages(gfp_flags, order);
if (!page)
return 0;
ion_pages_sync_for_device(NULL, page, PAGE_SIZE << order,
@ -91,15 +91,10 @@ static void free_buffer_page(struct ion_system_heap *heap,
unsigned int order)
{
bool cached = ion_buffer_cached(buffer);
bool split_pages = ion_buffer_fault_user_mappings(buffer);
int i;
if (!cached) {
struct ion_page_pool *pool = heap->pools[order_to_index(order)];
ion_page_pool_free(pool, page);
} else if (split_pages) {
for (i = 0; i < (1 << order); i++)
__free_page(page + i);
} else {
__free_pages(page, order);
}