diff options
author | Stefan Agner <stefan.agner@toradex.com> | 2019-06-03 10:59:09 +0200 |
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committer | Stefan Agner <stefan.agner@toradex.com> | 2019-06-03 10:59:09 +0200 |
commit | 2115c1bc6e396d5ffe9ecbe394d1c50a6e25c404 (patch) | |
tree | 20fff445991414f23c0a29237940b75cd756de86 /mm/mmap.c | |
parent | b794ea49ba3816c0d5cf05506964a8e69ce4efa3 (diff) | |
parent | 3f7c1cab1a61108821cf47dda8a32ed25cc3588b (diff) |
Merge tag 'v5.0.19' into toradex_5.0.ytoradex_5.0.y
This is the 5.0.19 stable release
Diffstat (limited to 'mm/mmap.c')
-rw-r--r-- | mm/mmap.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index da9236a5022e..446698476e4c 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -2736,9 +2736,17 @@ int __do_munmap(struct mm_struct *mm, unsigned long start, size_t len, return -EINVAL; len = PAGE_ALIGN(len); + end = start + len; if (len == 0) return -EINVAL; + /* + * arch_unmap() might do unmaps itself. It must be called + * and finish any rbtree manipulation before this code + * runs and also starts to manipulate the rbtree. + */ + arch_unmap(mm, start, end); + /* Find the first overlapping VMA */ vma = find_vma(mm, start); if (!vma) @@ -2747,7 +2755,6 @@ int __do_munmap(struct mm_struct *mm, unsigned long start, size_t len, /* we have start < vma->vm_end */ /* if it doesn't overlap, we have nothing.. */ - end = start + len; if (vma->vm_start >= end) return 0; @@ -2817,12 +2824,6 @@ int __do_munmap(struct mm_struct *mm, unsigned long start, size_t len, /* Detach vmas from rbtree */ detach_vmas_to_be_unmapped(mm, vma, prev, end); - /* - * mpx unmap needs to be called with mmap_sem held for write. - * It is safe to call it before unmap_region(). - */ - arch_unmap(mm, vma, start, end); - if (downgrade) downgrade_write(&mm->mmap_sem); |