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mm: remove can_modify_mm()

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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>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Jeff Xu <jeffxu@chromium.org>
Cc: Kees Cook <kees@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
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>
This commit is contained in:
Pedro Falcato 2024-08-17 01:18:33 +01:00 committed by Andrew Morton
parent 23c57d1fa2
commit 5b3db2b812
2 changed files with 0 additions and 35 deletions
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14
mm/internal.h
View File

@ -1359,25 +1359,11 @@ static inline int can_do_mseal(unsigned long flags)
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

21
mm/mseal.c
View File

@ -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.
*/