From 78af1e178f3ea1d496d95756cec778812b9cadf9 Mon Sep 17 00:00:00 2001
From: Jordan Crouse <jcrouse@codeaurora.org>
Date: Fri, 18 Jul 2014 11:46:36 -0600
Subject: [PATCH] msm: kgsl: Mark mmapped objects with VM_DONTCOPY
Add VM_DONTCOPY to the default set of mmap flags to keep VM objects
from being copied on fork() and causing issues. KGSL file descriptors
copied to a child are not expected to be usable.
Change-Id: Ic0dedbad85c07118a931ccb9f7a6fd0507da3e5a
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
---
drivers/gpu/msm/kgsl_sharedmem.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/msm/kgsl_sharedmem.c b/drivers/gpu/msm/kgsl_sharedmem.c
index 9fd10c751b6d..8d8e9635b19b 100755
--- a/drivers/gpu/msm/kgsl_sharedmem.c
+++ b/drivers/gpu/msm/kgsl_sharedmem.c
@@ -527,7 +527,7 @@ static void kgsl_cma_coherent_free(struct kgsl_memdesc *memdesc)
/* Global - also used by kgsl_drm.c */
struct kgsl_memdesc_ops kgsl_page_alloc_ops = {
.free = kgsl_page_alloc_free,
- .vmflags = VM_NODUMP | VM_DONTEXPAND,
+ .vmflags = VM_NODUMP | VM_DONTEXPAND | VM_DONTCOPY,
.vmfault = kgsl_page_alloc_vmfault,
.map_kernel = kgsl_page_alloc_map_kernel,
.unmap_kernel = kgsl_page_alloc_unmap_kernel,
@@ -537,7 +537,7 @@ EXPORT_SYMBOL(kgsl_page_alloc_ops);
/* CMA ops - used during NOMMU mode */
static struct kgsl_memdesc_ops kgsl_cma_ops = {
.free = kgsl_cma_coherent_free,
- .vmflags = VM_NODUMP | VM_PFNMAP | VM_DONTEXPAND,
+ .vmflags = VM_NODUMP | VM_PFNMAP | VM_DONTEXPAND | VM_DONTCOPY,
.vmfault = kgsl_contiguous_vmfault,
};
--
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