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Merge branch 'mm-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[cascardo/linux.git]
/
mm
/
debug.c
diff --git
a/mm/debug.c
b/mm/debug.c
index
74c7cae
..
9feb699
100644
(file)
--- a/
mm/debug.c
+++ b/
mm/debug.c
@@
-42,6
+42,11
@@
const struct trace_print_flags vmaflag_names[] = {
void __dump_page(struct page *page, const char *reason)
{
void __dump_page(struct page *page, const char *reason)
{
+ /*
+ * Avoid VM_BUG_ON() in page_mapcount().
+ * page->_mapcount space in struct page is used by sl[aou]b pages to
+ * encode own info.
+ */
int mapcount = PageSlab(page) ? 0 : page_mapcount(page);
pr_emerg("page:%p count:%d mapcount:%d mapping:%p index:%#lx",
int mapcount = PageSlab(page) ? 0 : page_mapcount(page);
pr_emerg("page:%p count:%d mapcount:%d mapping:%p index:%#lx",