linux-kernel - [PATCH] memblock tests: Fix testing with 32-bit physical addresses

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Date:   Fri,  4 Mar 2022 13:52:49 +0100
From:   Karolina Drobnik <karolinadrobnik@...il.com>
To:     linux-mm@...ck.org
Cc:     rppt@...nel.org, linux-kernel@...r.kernel.org,
        Karolina Drobnik <karolinadrobnik@...il.com>
Subject: [PATCH] memblock tests: Fix testing with 32-bit physical addresses

Building memblock simulator on x86_64 with 32BIT_PHYS_ADDR_T=1
produces "cast to pointer from integer of different size" warnings.
Fix them by building the binary in 32-bit environment when using
32-bit physical addresses.

Signed-off-by: Karolina Drobnik <karolinadrobnik@...il.com>
---

This patch is on the top of memblock/for-next.

 tools/testing/memblock/scripts/Makefile.include | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/testing/memblock/scripts/Makefile.include b/tools/testing/memblock/scripts/Makefile.include
index 699b0d6cda07..393655310324 100644
--- a/tools/testing/memblock/scripts/Makefile.include
+++ b/tools/testing/memblock/scripts/Makefile.include
@@ -11,7 +11,9 @@ ifeq ($(MOVABLE_NODE), 1)
 	CFLAGS += -D MOVABLE_NODE
 endif

-# Use 32 bit physical addresses
+# Use 32 bit physical addresses.
+# Remember to install 32-bit version of dependencies.
 ifeq ($(32BIT_PHYS_ADDR_T), 1)
-	CFLAGS += -U CONFIG_PHYS_ADDR_T_64BIT
+	CFLAGS += -m32 -U CONFIG_PHYS_ADDR_T_64BIT
+	LDFLAGS += -m32
 endif
--
2.30.2