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authorAndrew Morton <akpm@linux-foundation.org>2014-10-09 15:28:19 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-10-09 22:25:57 -0400
commitff26f70f4323ffe332ab6a5b2550f687bbd15326 (patch)
tree712c4cee8b5a7f99dd810998b70ff9eabdc75623 /mm/mmap.c
parent5705465174686d007473e017b76c4b64b44aa690 (diff)
downloadlinux-ff26f70f4323ffe332ab6a5b2550f687bbd15326.tar.gz
mm/mmap.c: clean up CONFIG_DEBUG_VM_RB checks
- be consistent in printing the test which failed - one message was actually wrong (a<b != b>a) - don't print second bogus warning if browse_rb() failed Cc: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/mmap.c')
-rw-r--r--mm/mmap.c17
1 files changed, 11 insertions, 6 deletions
diff --git a/mm/mmap.c b/mm/mmap.c
index 69d4c5199fd..c9bc285df25 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -368,16 +368,18 @@ static int browse_rb(struct rb_root *root)
struct vm_area_struct *vma;
vma = rb_entry(nd, struct vm_area_struct, vm_rb);
if (vma->vm_start < prev) {
- pr_emerg("vm_start %lx prev %lx\n", vma->vm_start, prev);
+ pr_emerg("vm_start %lx < prev %lx\n",
+ vma->vm_start, prev);
bug = 1;
}
if (vma->vm_start < pend) {
- pr_emerg("vm_start %lx pend %lx\n", vma->vm_start, pend);
+ pr_emerg("vm_start %lx < pend %lx\n",
+ vma->vm_start, pend);
bug = 1;
}
if (vma->vm_start > vma->vm_end) {
- pr_emerg("vm_end %lx < vm_start %lx\n",
- vma->vm_end, vma->vm_start);
+ pr_emerg("vm_start %lx > vm_end %lx\n",
+ vma->vm_start, vma->vm_end);
bug = 1;
}
if (vma->rb_subtree_gap != vma_compute_subtree_gap(vma)) {
@@ -419,8 +421,10 @@ static void validate_mm(struct mm_struct *mm)
int i = 0;
unsigned long highest_address = 0;
struct vm_area_struct *vma = mm->mmap;
+
while (vma) {
struct anon_vma_chain *avc;
+
vma_lock_anon_vma(vma);
list_for_each_entry(avc, &vma->anon_vma_chain, same_vma)
anon_vma_interval_tree_verify(avc);
@@ -435,12 +439,13 @@ static void validate_mm(struct mm_struct *mm)
}
if (highest_address != mm->highest_vm_end) {
pr_emerg("mm->highest_vm_end %lx, found %lx\n",
- mm->highest_vm_end, highest_address);
+ mm->highest_vm_end, highest_address);
bug = 1;
}
i = browse_rb(&mm->mm_rb);
if (i != mm->map_count) {
- pr_emerg("map_count %d rb %d\n", mm->map_count, i);
+ if (i != -1)
+ pr_emerg("map_count %d rb %d\n", mm->map_count, i);
bug = 1;
}
BUG_ON(bug);