diff options
Diffstat (limited to 'mm')
-rw-r--r-- | mm/rmap.c | 24 |
1 files changed, 1 insertions, 23 deletions
@@ -53,24 +53,6 @@ | |||
53 | 53 | ||
54 | struct kmem_cache *anon_vma_cachep; | 54 | struct kmem_cache *anon_vma_cachep; |
55 | 55 | ||
56 | static inline void validate_anon_vma(struct vm_area_struct *find_vma) | ||
57 | { | ||
58 | #ifdef CONFIG_DEBUG_VM | ||
59 | struct anon_vma *anon_vma = find_vma->anon_vma; | ||
60 | struct vm_area_struct *vma; | ||
61 | unsigned int mapcount = 0; | ||
62 | int found = 0; | ||
63 | |||
64 | list_for_each_entry(vma, &anon_vma->head, anon_vma_node) { | ||
65 | mapcount++; | ||
66 | BUG_ON(mapcount > 100000); | ||
67 | if (vma == find_vma) | ||
68 | found = 1; | ||
69 | } | ||
70 | BUG_ON(!found); | ||
71 | #endif | ||
72 | } | ||
73 | |||
74 | /* This must be called under the mmap_sem. */ | 56 | /* This must be called under the mmap_sem. */ |
75 | int anon_vma_prepare(struct vm_area_struct *vma) | 57 | int anon_vma_prepare(struct vm_area_struct *vma) |
76 | { | 58 | { |
@@ -121,10 +103,8 @@ void __anon_vma_link(struct vm_area_struct *vma) | |||
121 | { | 103 | { |
122 | struct anon_vma *anon_vma = vma->anon_vma; | 104 | struct anon_vma *anon_vma = vma->anon_vma; |
123 | 105 | ||
124 | if (anon_vma) { | 106 | if (anon_vma) |
125 | list_add_tail(&vma->anon_vma_node, &anon_vma->head); | 107 | list_add_tail(&vma->anon_vma_node, &anon_vma->head); |
126 | validate_anon_vma(vma); | ||
127 | } | ||
128 | } | 108 | } |
129 | 109 | ||
130 | void anon_vma_link(struct vm_area_struct *vma) | 110 | void anon_vma_link(struct vm_area_struct *vma) |
@@ -134,7 +114,6 @@ void anon_vma_link(struct vm_area_struct *vma) | |||
134 | if (anon_vma) { | 114 | if (anon_vma) { |
135 | spin_lock(&anon_vma->lock); | 115 | spin_lock(&anon_vma->lock); |
136 | list_add_tail(&vma->anon_vma_node, &anon_vma->head); | 116 | list_add_tail(&vma->anon_vma_node, &anon_vma->head); |
137 | validate_anon_vma(vma); | ||
138 | spin_unlock(&anon_vma->lock); | 117 | spin_unlock(&anon_vma->lock); |
139 | } | 118 | } |
140 | } | 119 | } |
@@ -148,7 +127,6 @@ void anon_vma_unlink(struct vm_area_struct *vma) | |||
148 | return; | 127 | return; |
149 | 128 | ||
150 | spin_lock(&anon_vma->lock); | 129 | spin_lock(&anon_vma->lock); |
151 | validate_anon_vma(vma); | ||
152 | list_del(&vma->anon_vma_node); | 130 | list_del(&vma->anon_vma_node); |
153 | 131 | ||
154 | /* We must garbage collect the anon_vma if it's empty */ | 132 | /* We must garbage collect the anon_vma if it's empty */ |