linux-kernel - [PATCH v2 1/6] mm: Move can_modify

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Message-ID: <20240807211309.2729719-2-pedro.falcato@gmail.com>
Date: Wed,  7 Aug 2024 22:13:04 +0100
From: Pedro Falcato <pedro.falcato@...il.com>
To: Andrew Morton <akpm@...ux-foundation.org>,
	"Liam R. Howlett" <Liam.Howlett@...cle.com>,
	Vlastimil Babka <vbabka@...e.cz>,
	Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
Cc: linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	oliver.sang@...el.com,
	torvalds@...ux-foundation.org,
	jeffxu@...gle.com,
	Michael Ellerman <mpe@...erman.id.au>,
	Pedro Falcato <pedro.falcato@...il.com>
Subject: [PATCH v2 1/6] mm: Move can_modify_vma to mm/internal.h

Move can_modify_vma to internal.h so it can be inlined properly (with
the intent to remove can_modify_mm callsites).

Signed-off-by: Pedro Falcato <pedro.falcato@...il.com>
---
 mm/internal.h | 24 ++++++++++++++++++++++++
 mm/mseal.c    | 17 -----------------
 2 files changed, 24 insertions(+), 17 deletions(-)

diff --git a/mm/internal.h b/mm/internal.h
index 52f7fc4e8ac..90f50f3c4cf 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -1353,6 +1353,24 @@ static inline int can_do_mseal(unsigned long flags)
 	return 0;
 }
 
+static inline bool vma_is_sealed(struct vm_area_struct *vma)
+{
+	return (vma->vm_flags & VM_SEALED);
+}
+
+/*
+ * check if a vma is sealed for modification.
+ * return true, if modification is allowed.
+ */
+static inline bool can_modify_vma(struct vm_area_struct *vma)
+{
+	if (unlikely(vma_is_sealed(vma)))
+		return false;
+
+	return true;
+}
+
+
 bool can_modify_mm(struct mm_struct *mm, unsigned long start,
 		unsigned long end);
 bool can_modify_mm_madv(struct mm_struct *mm, unsigned long start,
@@ -1374,6 +1392,12 @@ static inline bool can_modify_mm_madv(struct mm_struct *mm, unsigned long start,
 {
 	return true;
 }
+
+static inline bool can_modify_vma(struct vm_area_struct *vma)
+{
+	return true;
+}
+
 #endif
 
 #ifdef CONFIG_SHRINKER_DEBUG
diff --git a/mm/mseal.c b/mm/mseal.c
index bf783bba8ed..4591ae8d29c 100644
--- a/mm/mseal.c
+++ b/mm/mseal.c
@@ -16,28 +16,11 @@
 #include <linux/sched.h>
 #include "internal.h"
 
-static inline bool vma_is_sealed(struct vm_area_struct *vma)
-{
-	return (vma->vm_flags & VM_SEALED);
-}
-
 static inline void set_vma_sealed(struct vm_area_struct *vma)
 {
 	vm_flags_set(vma, VM_SEALED);
 }
 
-/*
- * check if a vma is sealed for modification.
- * return true, if modification is allowed.
- */
-static bool can_modify_vma(struct vm_area_struct *vma)
-{
-	if (unlikely(vma_is_sealed(vma)))
-		return false;
-
-	return true;
-}
-
 static bool is_madv_discard(int behavior)
 {
 	return	behavior &
-- 
2.46.0