gpu: ion: Fix bug in ion shrinker

The high variable was sometimes used uninitialized
Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
[jstultz: modified patch to apply to staging directory]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/android/ion/ion_page_pool.c

@@ -203,8 +203,7 @@ static int ion_page_pool_shrink(struct shrinker *shrinker,
 	bool high;
 	int nr_to_scan = sc->nr_to_scan;
 
-	if (sc->gfp_mask & __GFP_HIGHMEM)
-		high = true;
+	high = sc->gfp_mask & __GFP_HIGHMEM;
 
 	if (nr_to_scan == 0)
 		return ion_page_pool_total(high);