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@xxxxxxxxx>
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@xxxxxxxxx
Signed-off-by: Pedro Falcato <pedro.falcato@xxxxxxxxx>
Reviewed-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Cc: Jeff Xu <jeffxu@xxxxxxxxxxxx>
Cc: Kees Cook <kees@xxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Lorenzo Stoakes <lorenzo.stoakes@xxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
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@xxxxxxxxx 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
