[merged mm-stable] tools-testing-fix-phys_addr_t-size-on-64-bit-systems.patch removed from -mm tree

[merged mm-stable] tools-testing-fix-phys_addr_t-size-on-64-bit-systems.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: tools: testing: fix phys_addr_t size on 64-bit systems
has been removed from the -mm tree.  Its filename was
     tools-testing-fix-phys_addr_t-size-on-64-bit-systems.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Subject: tools: testing: fix phys_addr_t size on 64-bit systems
Date: Thu, 17 Oct 2024 17:56:38 +0100

The phys_addr_t size is predicated on whether CONFIG_PHYS_ADDR_T_64BIT is
set or not.

In the VMA tests, virt_to_phys() from tools/include/linux casts a volatile
void * pointer to phys_addr_t, if CONFIG_PHYS_ADDR_T_64BIT is not set,
this will be 32-bit and trigger a warning.

Obviously this might also lead to truncation, which we would rather avoid.

Fix this by adjusting the generation of generated/bit-length.h to generate
a CONFIG_PHYS_ADDR_T{bits}BIT define.

This does result in the generation of the useless CONFIG_PHYS_ADDR_T_32BIT
define for 32-bit systems, but this should have no effect, and makes
implementation of this easier.

This resolves the issue and the warning.

[lorenzo.stoakes@oracle.com: VMA tests not properly importing bit-length.h]
  Link: https://lkml.kernel.org/r/a6183df9-3108-4d59-8128-4fc6c14e22a5@lucifer.local
Link: https://lkml.kernel.org/r/20241017165638.95602-1-lorenzo.stoakes@oracle.com
Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Tested-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Cc: Jann Horn <jannh@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 tools/testing/shared/shared.mk |    1 +
 tools/testing/vma/vma.c        |    2 ++
 2 files changed, 3 insertions(+)

--- a/tools/testing/shared/shared.mk~tools-testing-fix-phys_addr_t-size-on-64-bit-systems
+++ a/tools/testing/shared/shared.mk
@@ -69,6 +69,7 @@ generated/bit-length.h: FORCE
 	@if ! grep -qws CONFIG_$(LONG_BIT)BIT generated/bit-length.h; then   \
 		echo "Generating $@";                                        \
 		echo "#define CONFIG_$(LONG_BIT)BIT 1" > $@;                 \
+		echo "#define CONFIG_PHYS_ADDR_T_$(LONG_BIT)BIT 1" >> $@;    \
 	fi
 
 FORCE: ;
--- a/tools/testing/vma/vma.c~tools-testing-fix-phys_addr_t-size-on-64-bit-systems
+++ a/tools/testing/vma/vma.c
@@ -4,6 +4,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 
+#include "generated/bit-length.h"
+
 #include "maple-shared.h"
 #include "vma_internal.h"
 
_

Patches currently in -mm which might be from lorenzo.stoakes@oracle.com are

mm-pagewalk-add-the-ability-to-install-ptes.patch
mm-add-pte_marker_guard-pte-marker.patch
mm-madvise-implement-lightweight-guard-page-mechanism.patch
tools-testing-update-tools-uapi-header-for-mman-commonh.patch
selftests-mm-add-self-tests-for-guard-page-feature.patch
mm-remove-unnecessary-page_table_lock-on-stack-expansion.patch