diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index 4dfa42b7d053..984f0502c9d0 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -1830,6 +1830,18 @@ static inline pte_t ptep_get_and_clear(struct mm_struct *mm,
 	return __ptep_get_and_clear(mm, addr, ptep);
 }
 
+/*
+ * Note: strictly-zero compare is narrower than pte_none(), but the gap is
+ * harmless: a fresh kernel PTE has no software bits set.
+ */
+static inline bool ptep_try_set(pte_t *ptep, pte_t new_pte)
+{
+	pteval_t old = 0;
+
+	return try_cmpxchg(&pte_val(*ptep), &old, pte_val(new_pte));
+}
+#define ptep_try_set ptep_try_set
+
 #define test_and_clear_young_ptes test_and_clear_young_ptes
 static inline bool test_and_clear_young_ptes(struct vm_area_struct *vma,
 		unsigned long addr, pte_t *ptep, unsigned int nr)
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index 2187e9cfcefa..ac295ca6c92f 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -1284,6 +1284,18 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm,
 	} while (!try_cmpxchg((long *)&ptep->pte, (long *)&old_pte, *(long *)&new_pte));
 }
 
+/*
+ * Note: strictly-zero compare is narrower than pte_none(), but the gap is
+ * harmless: _PAGE_DIRTY and _PAGE_ACCESSED aren't set on untouched kernel PTEs.
+ */
+static inline bool ptep_try_set(pte_t *ptep, pte_t new_pte)
+{
+	pte_t old_pte = __pte(0);
+
+	return try_cmpxchg((long *)&ptep->pte, (long *)&old_pte, *(long *)&new_pte);
+}
+#define ptep_try_set ptep_try_set
+
 #define flush_tlb_fix_spurious_fault(vma, address, ptep) do { } while (0)
 
 #define  __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS
diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h
index cdd68ed3ae1a..b5739bb99fc1 100644
--- a/include/linux/pgtable.h
+++ b/include/linux/pgtable.h
@@ -1036,6 +1036,31 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addres
 }
 #endif
 
+#ifndef ptep_try_set
+/**
+ * ptep_try_set - atomically set an empty kernel PTE
+ * @ptep: page table entry
+ * @new_pte: value to install
+ *
+ * Atomically set *@ptep to @new_pte iff *@ptep is pte_none(). Return true on
+ * success, false if the slot was already populated or the arch has no
+ * implementation.
+ *
+ * For special kernel page tables only - never user page tables. The caller must
+ * prevent concurrent teardown of @ptep and must accept that other writers may
+ * race. Concurrent clearers must use ptep_get_and_clear() so racing accesses
+ * agree on the outcome.
+ *
+ * Architectures opt in by providing a cmpxchg-based override and defining
+ * ptep_try_set as an identity macro. The generic stub returns false, which is
+ * correct for callers that fall through to oops on failure.
+ */
+static inline bool ptep_try_set(pte_t *ptep, pte_t new_pte)
+{
+	return false;
+}
+#endif
+
 #ifndef wrprotect_ptes
 /**
  * wrprotect_ptes - Write-protect PTEs that map consecutive pages of the same