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ipc/shm: use the vma iterator for munmap calls 

Pass through the vma iterator to do_vmi_munmap() to handle the iterator
state internally

Link: https://lkml.kernel.org/r/20230120162650.984577-16-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Liam R. Howlett 2023-01-20 11:26:16 -05:00 committed by Andrew Morton
parent f2ebfe43ba
commit d60beb1f69
1 changed files with 5 additions and 6 deletions
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11
ipc/shm.c
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@ -1786,8 +1786,8 @@ long ksys_shmdt(char __user *shmaddr)
*/
file = vma->vm_file;
size = i_size_read(file_inode(vma->vm_file));
do_munmap(mm, vma->vm_start, vma->vm_end - vma->vm_start, NULL);
mas_pause(&vmi.mas);
do_vmi_munmap(&vmi, mm, vma->vm_start,
vma->vm_end - vma->vm_start, NULL, false);
/*
* We discovered the size of the shm segment, so
* break out of here and fall through to the next
@ -1810,10 +1810,9 @@ long ksys_shmdt(char __user *shmaddr)
/* finding a matching vma now does not alter retval */
if ((vma->vm_ops == &shm_vm_ops) &&
((vma->vm_start - addr)/PAGE_SIZE == vma->vm_pgoff) &&
(vma->vm_file == file)) {
do_munmap(mm, vma->vm_start, vma->vm_end - vma->vm_start, NULL);
mas_pause(&vmi.mas);
}
(vma->vm_file == file))
do_vmi_munmap(&vmi, mm, vma->vm_start,
vma->vm_end - vma->vm_start, NULL, false);
vma = vma_next(&vmi);
}