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ANDROID: mm: export vm_unmapped_area()

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The mali GPU device needs to have a custom get_unmapped_area() file
operation [1] in order to align GPU VA memory to a 2MB boundary for
64-bit processes. Since the GPU driver is a module, we need to export
vm_unmapped_area() to call it from the device's get_unmapped_area() file
op.

[1] https://android.googlesource.com/kernel/google-modules/gpu/+/refs/heads/android-gs-raviole-mainline/mali_kbase/thirdparty/mali_kbase_mmap.c#237

Bug: 254386546
Signed-off-by: Will McVicker <willmcvicker@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I08a1247e215a46fa0ca1a0d61f63be4fa8375ee4
This commit is contained in:
Will McVicker
2022-10-20 15:28:34 -07:00
committed by Greg Kroah-Hartman
parent de07798cf0
commit 0291c4ad93
1 changed files with 1 additions and 0 deletions
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mm/mmap.c
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@@ -1629,6 +1629,7 @@ unsigned long vm_unmapped_area(struct vm_unmapped_area_info *info)
trace_vm_unmapped_area(addr, info);
return addr;
}
EXPORT_SYMBOL_GPL(vm_unmapped_area);
/* Get an address range which is currently unmapped.
* For shmat() with addr=0.