diff options
Diffstat (limited to 'mm/sparse.c')
| -rw-r--r-- | mm/sparse.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/mm/sparse.c b/mm/sparse.c index 58cab483e81b..62eef264a7bd 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -779,7 +779,13 @@ int __meminit sparse_add_one_section(struct pglist_data *pgdat, goto out; } - memset(memmap, 0, sizeof(struct page) * PAGES_PER_SECTION); +#ifdef CONFIG_DEBUG_VM + /* + * Poison uninitialized struct pages in order to catch invalid flags + * combinations. + */ + memset(memmap, PAGE_POISON_PATTERN, sizeof(struct page) * PAGES_PER_SECTION); +#endif section_mark_present(ms); |