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Commit 51dc5c1a authored by Prakash Gupta's avatar Prakash Gupta
Browse files

ion: ion_system_heap: update supported page-orders for ion pool 



The supported mappings for ARMv8 are 1GB, 2MB, 64KB and 4KB. So 1MB
allocations from ion pool is not used for ARMv8 section map. Such
allocations end up being mapped as multiple 64K sections map, while still
using 1MB contiguous memory. In case of ARMv7s, page-order 9 allocations
are not used as section map.

Drop page-order 8 ion pool for builds using ARMv8 pagetables and page-order
9 ion pool for builds using ARMv7s.

Change-Id: Ifff2d8f1cf61ce443311d16c11b8edc191b27a22
Signed-off-by: default avatarPrakash Gupta <guptap@codeaurora.org>
parent e620404d

drivers/staging/android/ion/ion_system_heap.c

+6 −2
Original line number Diff line number Diff line
@@ -2,7 +2,7 @@ 
 * drivers/staging/android/ion/ion_system_heap.c

 *

 * Copyright (C) 2011 Google, Inc.

 * Copyright (c) 2011-2017, The Linux Foundation. All rights reserved.

 * Copyright (c) 2011-2018, The Linux Foundation. All rights reserved.

 *

 * This software is licensed under the terms of the GNU General Public

 * License version 2, as published by the Free Software Foundation, and
@@ -36,7 +36,11 @@ static gfp_t high_order_gfp_flags = (GFP_HIGHUSER | __GFP_NOWARN | 
static gfp_t low_order_gfp_flags  = (GFP_HIGHUSER | __GFP_NOWARN);



#ifndef CONFIG_ALLOC_BUFFERS_IN_4K_CHUNKS

static const unsigned int orders[] = {9, 8, 4, 0};

#if defined(CONFIG_IOMMU_IO_PGTABLE_ARMV7S)

static const unsigned int orders[] = {8, 4, 0};

#else

static const unsigned int orders[] = {9, 4, 0};

#endif

#else

static const unsigned int orders[] = {0};

#endif