linux-kernel - [PATCH 106/115] ion: allow cached mappings of chunk and system heap buffers

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Date:	Fri, 13 Dec 2013 19:26:26 -0800
From:	John Stultz <john.stultz@...aro.org>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Greg KH <gregkh@...uxfoundation.org>,
	Android Kernel Team <kernel-team@...roid.com>,
	Sumit Semwal <sumit.semwal@...aro.org>,
	Jesse Barker <jesse.barker@....com>,
	Colin Cross <ccross@...roid.com>,
	John Stultz <john.stultz@...aro.org>
Subject: [PATCH 106/115] ion: allow cached mappings of chunk and system heap buffers

From: Colin Cross <ccross@...roid.com>

Now that ion_vm_fault uses vm_insert_pfn instead of vm_insert_page
cached buffers can be supported in any heap.  Remove the checks
in the chunk and system heaps.

Signed-off-by: Colin Cross <ccross@...roid.com>
Signed-off-by: John Stultz <john.stultz@...aro.org>
---
 drivers/staging/android/ion/ion_chunk_heap.c  | 3 ---
 drivers/staging/android/ion/ion_system_heap.c | 3 ---
 2 files changed, 6 deletions(-)

diff --git a/drivers/staging/android/ion/ion_chunk_heap.c b/drivers/staging/android/ion/ion_chunk_heap.c
index 4eacf52..34d1d18 100644
--- a/drivers/staging/android/ion/ion_chunk_heap.c
+++ b/drivers/staging/android/ion/ion_chunk_heap.c
@@ -47,9 +47,6 @@ static int ion_chunk_heap_allocate(struct ion_heap *heap,
 	unsigned long num_chunks;
 	unsigned long allocated_size;
 
-	if (ion_buffer_fault_user_mappings(buffer))
-		return -ENOMEM;
-
 	allocated_size = ALIGN(size, chunk_heap->chunk_size);
 	num_chunks = allocated_size / chunk_heap->chunk_size;
 
diff --git a/drivers/staging/android/ion/ion_system_heap.c b/drivers/staging/android/ion/ion_system_heap.c
index a4bcf09..53afa33 100644
--- a/drivers/staging/android/ion/ion_system_heap.c
+++ b/drivers/staging/android/ion/ion_system_heap.c
@@ -148,9 +148,6 @@ static int ion_system_heap_allocate(struct ion_heap *heap,
 	if (align > PAGE_SIZE)
 		return -EINVAL;
 
-	if (ion_buffer_fault_user_mappings(buffer))
-		return -EINVAL;
-
 	INIT_LIST_HEAD(&pages);
 	while (size_remaining > 0) {
 		info = alloc_largest_available(sys_heap, buffer, size_remaining, max_order);
-- 
1.8.3.2

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