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Commit df89a864631f5d840f4873c4c03733b4206e78ea

Authored by Manfred Spraul
Committed by Linus Torvalds
1 parent 199a9afc3d
Exists in master and in 7 other branches imx_3.0.35_4.1.0, imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga, smarc-l5.0.0_1.0.0-ga

[PATCH] list_del debug check 

A list_del() debugging check.  Has been in -mm for years.  Dave moved
list_del() out-of-line in the debug case, so this is now suitable for
mainline.

Cc: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Showing 1 changed file with 7 additions and 5 deletions Side-by-side Diff

... ... @@ -59,14 +59,17 @@
59 59 */
60 60 void list_del(struct list_head *entry)
61 61 {
  62 + BUG_ON(entry->prev->next != entry);
  63 + BUG_ON(entry->next->prev != entry);
  64 +
62 65 if (unlikely(entry->prev->next != entry)) {
63   - printk(KERN_ERR "list_del corruption. prev->next should be %p, but was %p\n",
64   - entry, entry->prev->next);
  66 + printk(KERN_ERR "list_del corruption. prev->next should be %p, "
  67 + "but was %p\n", entry, entry->prev->next);
65 68 BUG();
66 69 }
67 70 if (unlikely(entry->next->prev != entry)) {
68   - printk(KERN_ERR "list_del corruption. next->prev should be %p, but was %p\n",
69   - entry, entry->next->prev);
  71 + printk(KERN_ERR "list_del corruption. next->prev should be %p, "
  72 + "but was %p\n", entry, entry->next->prev);
70 73 BUG();
71 74 }
72 75 __list_del(entry->prev, entry->next);