linux-kernel - [PATCH 7/7] mm: Remove can_modify

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Message-ID: <20240806212808.1885309-8-pedro.falcato@gmail.com>
Date: Tue,  6 Aug 2024 22:28:08 +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 7/7] mm: Remove can_modify_mm()

With no more users in the tree, we can finally remove can_modify_mm().

Signed-off-by: Pedro Falcato <pedro.falcato@...il.com>
---
 mm/internal.h |  8 --------
 mm/mseal.c    | 21 ---------------------
 2 files changed, 29 deletions(-)

diff --git a/mm/internal.h b/mm/internal.h
index 4b516618389..e4416f5da2f 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -1515,8 +1515,6 @@ static inline bool can_modify_vma(struct vm_area_struct *vma)
 }
 
 
-bool can_modify_mm(struct mm_struct *mm, unsigned long start,
-		unsigned long end);
 bool can_modify_vma_madv(struct vm_area_struct *vma, int behavior);
 #else
 static inline int can_do_mseal(unsigned long flags)
@@ -1524,12 +1522,6 @@ static inline int can_do_mseal(unsigned long flags)
 	return -EPERM;
 }
 
-static inline bool can_modify_mm(struct mm_struct *mm, unsigned long start,
-		unsigned long end)
-{
-	return true;
-}
-
 static inline bool can_modify_vma_madv(struct vm_area_struct *vma, int behavior)
 {
 	return true;
diff --git a/mm/mseal.c b/mm/mseal.c
index fdd1666344f..28cd17d7aaf 100644
--- a/mm/mseal.c
+++ b/mm/mseal.c
@@ -53,27 +53,6 @@ static bool is_ro_anon(struct vm_area_struct *vma)
 	return false;
 }
 
-/*
- * Check if the vmas of a memory range are allowed to be modified.
- * the memory ranger can have a gap (unallocated memory).
- * return true, if it is allowed.
- */
-bool can_modify_mm(struct mm_struct *mm, unsigned long start, unsigned long end)
-{
-	struct vm_area_struct *vma;
-
-	VMA_ITERATOR(vmi, mm, start);
-
-	/* going through each vma to check. */
-	for_each_vma_range(vmi, vma, end) {
-		if (unlikely(!can_modify_vma(vma)))
-			return false;
-	}
-
-	/* Allow by default. */
-	return true;
-}
-
 /*
  * Check if a vma is allowed to be modified by madvise.
  */
-- 
2.46.0