diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2012-03-15 16:11:36 +0000 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2012-03-15 16:11:40 +0000 |
| commit | 86a30bece9ad4cc91c393a829a7b128291e0fb65 (patch) | |
| tree | 6cb3e6ad413d74118535f77436056c8d3cfae0eb /mm/mmap.c | |
| parent | 243d58ec5792299fa212d05a4113c0ebac2df6a3 (diff) | |
| parent | a323f66439c04d1c3ae4dc20cc2d44d52ee43c9f (diff) | |
Merge branch 'fixes-non-critical' of git://github.com/hzhuang1/linux into next/maintainers
* 'fixes-non-critical' of git://github.com/hzhuang1/linux:
MAINTAINERS: update MAINTAINERS email entry
MAINTAINERS: update maintainer entry for pxa/hx4700
(update to v3.3-rc7)
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'mm/mmap.c')
| -rw-r--r-- | mm/mmap.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index 3f758c7f4c81..da15a79b1441 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1266,8 +1266,9 @@ munmap_back: vma->vm_pgoff = pgoff; INIT_LIST_HEAD(&vma->anon_vma_chain); + error = -EINVAL; /* when rejecting VM_GROWSDOWN|VM_GROWSUP */ + if (file) { - error = -EINVAL; if (vm_flags & (VM_GROWSDOWN|VM_GROWSUP)) goto free_vma; if (vm_flags & VM_DENYWRITE) { @@ -1293,6 +1294,8 @@ munmap_back: pgoff = vma->vm_pgoff; vm_flags = vma->vm_flags; } else if (vm_flags & VM_SHARED) { + if (unlikely(vm_flags & (VM_GROWSDOWN|VM_GROWSUP))) + goto free_vma; error = shmem_zero_setup(vma); if (error) goto free_vma; @@ -1605,7 +1608,6 @@ EXPORT_SYMBOL(find_vma); /* * Same as find_vma, but also return a pointer to the previous VMA in *pprev. - * Note: pprev is set to NULL when return value is NULL. */ struct vm_area_struct * find_vma_prev(struct mm_struct *mm, unsigned long addr, @@ -1614,7 +1616,16 @@ find_vma_prev(struct mm_struct *mm, unsigned long addr, struct vm_area_struct *vma; vma = find_vma(mm, addr); - *pprev = vma ? vma->vm_prev : NULL; + if (vma) { + *pprev = vma->vm_prev; + } else { + struct rb_node *rb_node = mm->mm_rb.rb_node; + *pprev = NULL; + while (rb_node) { + *pprev = rb_entry(rb_node, struct vm_area_struct, vm_rb); + rb_node = rb_node->rb_right; + } + } return vma; } |