[PATCH v4 12/25] tools/testing/vma: test that legacy flag helpers work correctly
From: "Lorenzo Stoakes (Oracle)" <ljs@kernel.org>
Date: 2026-03-20 19:39:14
Also in:
linux-fsdevel, linux-mips, linux-mm, linux-riscv, linux-s390, linux-um, lkml, loongarch, selinux
Subsystem:
memory mapping, the rest · Maintainers:
Andrew Morton, Liam R. Howlett, Lorenzo Stoakes, Linus Torvalds
Update the existing compare_legacy_flags() predicate function to assert that legacy_to_vma_flags() and vma_flags_to_legacy() behave as expected. Signed-off-by: Lorenzo Stoakes (Oracle) <ljs@kernel.org> --- tools/testing/vma/tests/vma.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/tools/testing/vma/tests/vma.c b/tools/testing/vma/tests/vma.c
index 98e465fb1bf2..1fae25170ff7 100644
--- a/tools/testing/vma/tests/vma.c
+++ b/tools/testing/vma/tests/vma.c@@ -5,6 +5,7 @@ static bool compare_legacy_flags(vm_flags_t legacy_flags, vma_flags_t flags) const unsigned long legacy_val = legacy_flags; /* The lower word should contain the precise same value. */ const unsigned long flags_lower = flags.__vma_flags[0]; + vma_flags_t converted_flags; #if NUM_VMA_FLAG_BITS > BITS_PER_LONG int i;
@@ -17,6 +18,11 @@ static bool compare_legacy_flags(vm_flags_t legacy_flags, vma_flags_t flags) static_assert(sizeof(legacy_flags) == sizeof(unsigned long)); + /* Assert that legacy flag helpers work correctly. */ + converted_flags = legacy_to_vma_flags(legacy_flags); + ASSERT_FLAGS_SAME_MASK(&converted_flags, flags); + ASSERT_EQ(vma_flags_to_legacy(flags), legacy_flags); + return legacy_val == flags_lower; }
--
2.53.0