staging: android: ion: Remove file ion_carveout_heap.c

Remove file ion_carveout_heap.c as its functions and definitions are not
used anywhere.
Issue found with Coccinelle.

Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
Acked-by: Laura Abbott <labbott@redhat.com>
Link: https://lore.kernel.org/r/20190703081842.22872-1-nishkadg.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/android/ion/Kconfig b/drivers/staging/android/ion/Kconfig
index 178df58..dff6414 100644 (file)
--- a/drivers/staging/android/ion/Kconfig
+++ b/drivers/staging/android/ion/Kconfig
@@ -18,15 +18,6 @@ config ION_SYSTEM_HEAP
          Choose this option to enable the Ion system heap. The system heap
          is backed by pages from the buddy allocator. If in doubt, say Y.
 
-config ION_CARVEOUT_HEAP
-       bool "Ion carveout heap support"
-       depends on ION
-       help
-         Choose this option to enable carveout heaps with Ion. Carveout heaps
-         are backed by memory reserved from the system. Allocation times are
-         typically faster at the cost of memory not being used. Unless you
-         know your system has these regions, you should say N here.
-
 config ION_CHUNK_HEAP
        bool "Ion chunk heap support"
        depends on ION

diff --git a/drivers/staging/android/ion/Makefile b/drivers/staging/android/ion/Makefile
index 17f3a75..0ac5465 100644 (file)
--- a/drivers/staging/android/ion/Makefile
+++ b/drivers/staging/android/ion/Makefile
@@ -1,6 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
 obj-$(CONFIG_ION) += ion.o ion_heap.o
 obj-$(CONFIG_ION_SYSTEM_HEAP) += ion_system_heap.o ion_page_pool.o
-obj-$(CONFIG_ION_CARVEOUT_HEAP) += ion_carveout_heap.o
 obj-$(CONFIG_ION_CHUNK_HEAP) += ion_chunk_heap.o
 obj-$(CONFIG_ION_CMA_HEAP) += ion_cma_heap.o

diff --git a/drivers/staging/android/ion/ion_carveout_heap.c b/drivers/staging/android/ion/ion_carveout_heap.c
deleted file mode 100644 (file)
index bb9d614..0000000
--- a/drivers/staging/android/ion/ion_carveout_heap.c
+++ /dev/null
@@ -1,133 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * ION Memory Allocator carveout heap helper
- *
- * Copyright (C) 2011 Google, Inc.
- */
-
-#include <linux/dma-mapping.h>
-#include <linux/err.h>
-#include <linux/genalloc.h>
-#include <linux/io.h>
-#include <linux/mm.h>
-#include <linux/scatterlist.h>
-#include <linux/slab.h>
-
-#include "ion.h"
-
-#define ION_CARVEOUT_ALLOCATE_FAIL     -1
-
-struct ion_carveout_heap {
-       struct ion_heap heap;
-       struct gen_pool *pool;
-};
-
-static phys_addr_t ion_carveout_allocate(struct ion_heap *heap,
-                                        unsigned long size)
-{
-       struct ion_carveout_heap *carveout_heap =
-               container_of(heap, struct ion_carveout_heap, heap);
-       unsigned long offset = gen_pool_alloc(carveout_heap->pool, size);
-
-       if (!offset)
-               return ION_CARVEOUT_ALLOCATE_FAIL;
-
-       return offset;
-}
-
-static void ion_carveout_free(struct ion_heap *heap, phys_addr_t addr,
-                             unsigned long size)
-{
-       struct ion_carveout_heap *carveout_heap =
-               container_of(heap, struct ion_carveout_heap, heap);
-
-       if (addr == ION_CARVEOUT_ALLOCATE_FAIL)
-               return;
-
-       gen_pool_free(carveout_heap->pool, addr, size);
-}
-
-static int ion_carveout_heap_allocate(struct ion_heap *heap,
-                                     struct ion_buffer *buffer,
-                                     unsigned long size,
-                                     unsigned long flags)
-{
-       struct sg_table *table;
-       phys_addr_t paddr;
-       int ret;
-
-       table = kmalloc(sizeof(*table), GFP_KERNEL);
-       if (!table)
-               return -ENOMEM;
-       ret = sg_alloc_table(table, 1, GFP_KERNEL);
-       if (ret)
-               goto err_free;
-
-       paddr = ion_carveout_allocate(heap, size);
-       if (paddr == ION_CARVEOUT_ALLOCATE_FAIL) {
-               ret = -ENOMEM;
-               goto err_free_table;
-       }
-
-       sg_set_page(table->sgl, pfn_to_page(PFN_DOWN(paddr)), size, 0);
-       buffer->sg_table = table;
-
-       return 0;
-
-err_free_table:
-       sg_free_table(table);
-err_free:
-       kfree(table);
-       return ret;
-}
-
-static void ion_carveout_heap_free(struct ion_buffer *buffer)
-{
-       struct ion_heap *heap = buffer->heap;
-       struct sg_table *table = buffer->sg_table;
-       struct page *page = sg_page(table->sgl);
-       phys_addr_t paddr = PFN_PHYS(page_to_pfn(page));
-
-       ion_heap_buffer_zero(buffer);
-
-       ion_carveout_free(heap, paddr, buffer->size);
-       sg_free_table(table);
-       kfree(table);
-}
-
-static struct ion_heap_ops carveout_heap_ops = {
-       .allocate = ion_carveout_heap_allocate,
-       .free = ion_carveout_heap_free,
-       .map_user = ion_heap_map_user,
-       .map_kernel = ion_heap_map_kernel,
-       .unmap_kernel = ion_heap_unmap_kernel,
-};
-
-struct ion_heap *ion_carveout_heap_create(phys_addr_t base, size_t size)
-{
-       struct ion_carveout_heap *carveout_heap;
-       int ret;
-
-       struct page *page;
-
-       page = pfn_to_page(PFN_DOWN(base));
-       ret = ion_heap_pages_zero(page, size, pgprot_writecombine(PAGE_KERNEL));
-       if (ret)
-               return ERR_PTR(ret);
-
-       carveout_heap = kzalloc(sizeof(*carveout_heap), GFP_KERNEL);
-       if (!carveout_heap)
-               return ERR_PTR(-ENOMEM);
-
-       carveout_heap->pool = gen_pool_create(PAGE_SHIFT, -1);
-       if (!carveout_heap->pool) {
-               kfree(carveout_heap);
-               return ERR_PTR(-ENOMEM);
-       }
-       gen_pool_add(carveout_heap->pool, base, size, -1);
-       carveout_heap->heap.ops = &carveout_heap_ops;
-       carveout_heap->heap.type = ION_HEAP_TYPE_CARVEOUT;
-       carveout_heap->heap.flags = ION_HEAP_FLAG_DEFER_FREE;
-
-       return &carveout_heap->heap;
-}