drm_hwcomposer: Remove hardcoded PAGE_SIZE usage in gralloc_helper am: b9ae59025f am: 654d079921

Original change: https://android-review.googlesource.com/c/platform/external/drm_hwcomposer/+/3017877

Change-Id: I7f5652f4f23ec33a0be407111dfbe3b9ff299a98
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
diff --git a/tests/test_include/gralloc_helper.h b/tests/test_include/gralloc_helper.h
index b6cd24d..9741c33 100644
--- a/tests/test_include/gralloc_helper.h
+++ b/tests/test_include/gralloc_helper.h
@@ -47,7 +47,8 @@
 
 static inline size_t round_up_to_page_size(size_t x)
 {
-	return (x + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
+	const size_t page_size = getpagesize();
+	return (x + (page_size - 1)) & ~(page_size - 1);
 }
 
 #endif /* GRALLOC_HELPER_H_ */