diff options
| author | Liam R. Howlett <Liam.Howlett@Oracle.com> | 2024-08-30 00:00:58 -0400 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-09-03 21:15:52 -0700 |
| commit | 63fc66f5b6b18f39269a66cf34d8cb7a24fbfe88 (patch) | |
| tree | d7861de53cb52d9879fb9642b4b7961373aa1639 /mm/mmap.c | |
| parent | 13d77e0133908721f7da093ffd3169a92bae8b11 (diff) | |
ipc/shm, mm: drop do_vma_munmap()
The do_vma_munmap() wrapper existed for callers that didn't have a vma
iterator and needed to check the vma mseal status prior to calling the
underlying munmap(). All callers now use a vma iterator and since the
mseal check has been moved to do_vmi_align_munmap() and the vmas are
aligned, this function can just be called instead.
do_vmi_align_munmap() can no longer be static as ipc/shm is using it and
it is exported via the mm.h header.
Link: https://lkml.kernel.org/r/20240830040101.822209-19-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Bert Karwatzki <spasswolf@web.de>
Cc: Jeff Xu <jeffxu@chromium.org>
Cc: Jiri Olsa <olsajiri@gmail.com>
Cc: Kees Cook <kees@kernel.org>
Cc: Lorenzo Stoakes <lstoakes@gmail.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: "Paul E. McKenney" <paulmck@kernel.org>
Cc: Paul Moore <paul@paul-moore.com>
Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/mmap.c')
| -rw-r--r-- | mm/mmap.c | 33 |
1 files changed, 6 insertions, 27 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index 4faadc54e89d..6485f2300692 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -169,11 +169,12 @@ SYSCALL_DEFINE1(brk, unsigned long, brk) goto out; /* mapping intersects with an existing non-brk vma. */ /* * mm->brk must be protected by write mmap_lock. - * do_vma_munmap() will drop the lock on success, so update it - * before calling do_vma_munmap(). + * do_vmi_align_munmap() will drop the lock on success, so + * update it before calling do_vma_munmap(). */ mm->brk = brk; - if (do_vma_munmap(&vmi, brkvma, newbrk, oldbrk, &uf, true)) + if (do_vmi_align_munmap(&vmi, brkvma, mm, newbrk, oldbrk, &uf, + /* unlock = */ true)) goto out; goto success_unlocked; @@ -1479,9 +1480,9 @@ cannot_expand: vma->vm_file = get_file(file); /* * call_mmap() may map PTE, so ensure there are no existing PTEs - * call the vm_ops close function if one exists. + * and call the vm_ops close function if one exists. */ - vms_clean_up_area(&vms, &mas_detach, true); + vms_clean_up_area(&vms, &mas_detach); error = call_mmap(file, vma); if (error) goto unmap_and_free_vma; @@ -1745,28 +1746,6 @@ out: } /* - * do_vma_munmap() - Unmap a full or partial vma. - * @vmi: The vma iterator pointing at the vma - * @vma: The first vma to be munmapped - * @start: the start of the address to unmap - * @end: The end of the address to unmap - * @uf: The userfaultfd list_head - * @unlock: Drop the lock on success - * - * unmaps a VMA mapping when the vma iterator is already in position. - * Does not handle alignment. - * - * Return: 0 on success drops the lock of so directed, error on failure and will - * still hold the lock. - */ -int do_vma_munmap(struct vma_iterator *vmi, struct vm_area_struct *vma, - unsigned long start, unsigned long end, struct list_head *uf, - bool unlock) -{ - return do_vmi_align_munmap(vmi, vma, vma->vm_mm, start, end, uf, unlock); -} - -/* * do_brk_flags() - Increase the brk vma if the flags match. * @vmi: The vma iterator * @addr: The start address |