Staging: android: binder: Allow using highmem for binder buffers

The default kernel mapping for the pages allocated for the binder
buffers is never used. Set the __GFP_HIGHMEM flag when allocating
these pages so we don't needlessly use low memory pages that may
be required elsewhere.

Signed-off-by: Arve Hjønnevåg <arve@android.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/android/binder.c b/drivers/staging/android/binder.c
index db6c4c5..5d4610b 100644 (file)
--- a/drivers/staging/android/binder.c
+++ b/drivers/staging/android/binder.c
@@ -567,7 +567,7 @@ static int binder_update_page_range(struct binder_proc *proc, int allocate,
                page = &proc->pages[(page_addr - proc->buffer) / PAGE_SIZE];
 
                BUG_ON(*page);
-               *page = alloc_page(GFP_KERNEL | __GFP_ZERO);
+               *page = alloc_page(GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO);
                if (*page == NULL) {
                        pr_err("binder: %d: binder_alloc_buf failed "
                               "for page at %p\n", proc->pid, page_addr);