+ mm-remove-can_modify_mm.patch added to mm-unstable branch

+ mm-remove-can_modify_mm.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm: remove can_modify_mm()
has been added to the -mm mm-unstable branch.  Its filename is
     mm-remove-can_modify_mm.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-remove-can_modify_mm.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days

------------------------------------------------------
From: Pedro Falcato <pedro.falcato@gmail.com>
Subject: mm: remove can_modify_mm()
Date: Sat, 17 Aug 2024 01:18:33 +0100

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

Link: https://lkml.kernel.org/r/20240817-mseal-depessimize-v3-6-d8d2e037df30@gmail.com
Signed-off-by: Pedro Falcato <pedro.falcato@gmail.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Cc: Jeff Xu <jeffxu@chromium.org>
Cc: Kees Cook <kees@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/internal.h |   14 --------------
 mm/mseal.c    |   21 ---------------------
 2 files changed, 35 deletions(-)

--- a/mm/internal.h~mm-remove-can_modify_mm
+++ a/mm/internal.h
@@ -1368,25 +1368,11 @@ static inline int can_do_mseal(unsigned
 	return 0;
 }
 
-bool can_modify_mm(struct mm_struct *mm, unsigned long start,
-		unsigned long end);
 #else
 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_mm_madv(struct mm_struct *mm, unsigned long start,
-		unsigned long end, int behavior)
-{
-	return true;
-}
 #endif
 
 #ifdef CONFIG_SHRINKER_DEBUG
--- a/mm/mseal.c~mm-remove-can_modify_mm
+++ a/mm/mseal.c
@@ -54,27 +54,6 @@ static bool is_ro_anon(struct vm_area_st
 }
 
 /*
- * 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.
  */
 bool can_modify_vma_madv(struct vm_area_struct *vma, int behavior)
_

Patches currently in -mm which might be from pedro.falcato@gmail.com are

selftests-mm-add-mseal-test-for-no-discard-madvise.patch
selftests-mm-add-mseal-test-for-no-discard-madvise-fix.patch
mm-move-can_modify_vma-to-mm-vmah.patch
mm-munmap-replace-can_modify_mm-with-can_modify_vma.patch
mm-mprotect-replace-can_modify_mm-with-can_modify_vma.patch
mm-mremap-replace-can_modify_mm-with-can_modify_vma.patch
mseal-replace-can_modify_mm_madv-with-a-vma-variant.patch
mm-remove-can_modify_mm.patch
selftests-mm-add-more-mseal-traversal-tests.patch