[PATCH 12/13] mm/mprotect: convert mprotect code to use vma_flags_t
From: Lorenzo Stoakes <ljs@kernel.org>
Date: 2026-06-29 19:26:33
Also in:
dri-devel, intel-gfx, intel-xe, linux-arm-msm, linux-fbdev, linux-fsdevel, linux-mips, linux-mm, linux-samsung-soc, linux-sound, linux-tegra, lkml, nouveau, virtualization, xen-devel
Subsystem:
memory management, memory mapping, the rest · Maintainers:
Andrew Morton, Liam R. Howlett, Lorenzo Stoakes, Linus Torvalds
Replace use of the legacy vm_flags_t flags with vma_flags_t values throughout the mprotect logic. Note that we retain the legacy vm_flags_t bit shifting code in do_mprotect_key(), deferring a vma_flags_t approach to this for the time being. Additionally update comments to reflect the changes to be consistent. No functional change intended. Signed-off-by: Lorenzo Stoakes <ljs@kernel.org> --- mm/mprotect.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/mm/mprotect.c b/mm/mprotect.c
index 9cbf932b028c..c9504b2a2525 100644
--- a/mm/mprotect.c
+++ b/mm/mprotect.c@@ -40,7 +40,7 @@ static bool maybe_change_pte_writable(struct vm_area_struct *vma, pte_t pte) { - if (WARN_ON_ONCE(!(vma->vm_flags & VM_WRITE))) + if (WARN_ON_ONCE(!vma_test(vma, VMA_WRITE_BIT))) return false; /* Don't touch entries that are not even readable. */
@@ -97,7 +97,7 @@ static bool can_change_shared_pte_writable(struct vm_area_struct *vma, bool can_change_pte_writable(struct vm_area_struct *vma, unsigned long addr, pte_t pte) { - if (!(vma->vm_flags & VM_SHARED)) + if (!vma_test(vma, VMA_SHARED_BIT)) return can_change_private_pte_writable(vma, addr, pte); return can_change_shared_pte_writable(vma, pte);
@@ -194,7 +194,7 @@ static __always_inline void set_write_prot_commit_flush_ptes(struct vm_area_stru { bool set_write; - if (vma->vm_flags & VM_SHARED) { + if (vma_test(vma, VMA_SHARED_BIT)) { set_write = can_change_shared_pte_writable(vma, ptent); prot_commit_flush_ptes(vma, addr, ptep, oldpte, ptent, nr_ptes, /* idx = */ 0, set_write, tlb);
@@ -811,8 +811,8 @@ mprotect_fixup(struct vma_iterator *vmi, struct mmu_gather *tlb, vm_unacct_memory(nrpages); /* - * Private VM_LOCKED VMA becoming writable: trigger COW to avoid major - * fault on access. + * Private VMA_LOCKED_BIT VMA becoming writable: trigger COW to avoid + * major fault on access. */ if (vma_flags_test(&new_vma_flags, VMA_WRITE_BIT) && vma_flags_test(&old_vma_flags, VMA_LOCKED_BIT) &&
@@ -886,7 +886,7 @@ static int do_mprotect_pkey(unsigned long start, size_t len, goto out; start = vma->vm_start; error = -EINVAL; - if (!(vma->vm_flags & VM_GROWSDOWN)) + if (!vma_test(vma, VMA_GROWSDOWN_BIT)) goto out; } else { if (vma->vm_start > start)
@@ -894,7 +894,7 @@ static int do_mprotect_pkey(unsigned long start, size_t len, if (unlikely(grows & PROT_GROWSUP)) { end = vma->vm_end; error = -EINVAL; - if (!(vma->vm_flags & VM_GROWSUP)) + if (!vma_test(vma, VMA_GROWSUP_BIT)) goto out; } }
@@ -918,7 +918,7 @@ static int do_mprotect_pkey(unsigned long start, size_t len, } /* Does the application expect PROT_READ to imply PROT_EXEC */ - if (rier && (vma->vm_flags & VM_MAYEXEC)) + if (rier && vma_test(vma, VMA_MAYEXEC_BIT)) prot |= PROT_EXEC; /*
--
2.54.0