[PATCH v4 19/25] mm/vma: introduce vma_clear_flags[_mask]()
From: "Lorenzo Stoakes (Oracle)" <ljs@kernel.org>
Date: 2026-03-20 19:39:29
Also in:
linux-fsdevel, linux-mips, linux-mm, linux-riscv, linux-s390, linux-um, lkml, loongarch, selinux
Subsystem:
memory management - core, memory mapping, the rest · Maintainers:
Andrew Morton, David Hildenbrand, Liam R. Howlett, Lorenzo Stoakes, Linus Torvalds
Introduce a helper function and helper macro to easily clear a VMA's flags using the new vma_flags_t vma->flags field: * vma_clear_flags_mask() - Clears all of the flags in a specified mask in the VMA's flags field. * vma_clear_flags() - Clears all of the specified individual VMA flag bits in a VMA's flags field. Also update the VMA tests to reflect the change. Acked-by: Vlastimil Babka (SUSE) <vbabka@kernel.org> Signed-off-by: Lorenzo Stoakes (Oracle) <ljs@kernel.org> --- include/linux/mm.h | 16 ++++++++++++++++ tools/testing/vma/include/dup.h | 9 +++++++++ 2 files changed, 25 insertions(+)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 93d69de1520d..d3585999aa0b 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h@@ -1368,6 +1368,22 @@ static __always_inline void vma_set_flags_mask(struct vm_area_struct *vma, #define vma_set_flags(vma, ...) \ vma_set_flags_mask(vma, mk_vma_flags(__VA_ARGS__)) +/* Helper to clear all VMA flags in a VMA. */ +static __always_inline void vma_clear_flags_mask(struct vm_area_struct *vma, + vma_flags_t flags) +{ + vma_flags_clear_mask(&vma->flags, flags); +} + +/* + * Helper macro for clearing VMA flags, e.g.: + * + * vma_clear_flags(vma, VMA_IO_BIT, VMA_PFNMAP_BIT, VMA_DONTEXPAND_BIT, + * VMA_DONTDUMP_BIT); + */ +#define vma_clear_flags(vma, ...) \ + vma_clear_flags_mask(vma, mk_vma_flags(__VA_ARGS__)) + /* * Test whether a specific VMA flag is set in a VMA descriptor, e.g.: *
diff --git a/tools/testing/vma/include/dup.h b/tools/testing/vma/include/dup.h
index 36373b81ad24..93ea600d0895 100644
--- a/tools/testing/vma/include/dup.h
+++ b/tools/testing/vma/include/dup.h@@ -1065,6 +1065,15 @@ static __always_inline void vma_set_flags_mask(struct vm_area_struct *vma, #define vma_set_flags(vma, ...) \ vma_set_flags_mask(vma, mk_vma_flags(__VA_ARGS__)) +static __always_inline void vma_clear_flags_mask(struct vm_area_struct *vma, + vma_flags_t flags) +{ + vma_flags_clear_mask(&vma->flags, flags); +} + +#define vma_clear_flags(vma, ...) \ + vma_clear_flags_mask(vma, mk_vma_flags(__VA_ARGS__)) + static __always_inline bool vma_desc_test(const struct vm_area_desc *desc, vma_flag_t bit) {
--
2.53.0