mm/buddy: dump PG_compound_lock page flag

The array pageflag_names[] does conversion from page flags into their
corresponding names so that a meaningful representation of the
corresponding page flag can be printed.  This mechanism is used while
dumping page frames.  However, the array missed PG_compound_lock.  So
the PG_compound_lock page flag would be printed as a digital number
instead of a meaningful string.

The patch fixes that and prints "compound_lock" for the PG_compound_lock
page flag.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 457b4de122f4fdeba3309c2fedaf69fa055032d9..72869ea5c51387fc2594a05a5b78d17be89d7d4a 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5972,6 +5972,9 @@ static struct trace_print_flags pageflag_names[] = {
 #endif
 #ifdef CONFIG_MEMORY_FAILURE
        {1UL << PG_hwpoison,            "hwpoison"      },
+#endif
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+       {1UL << PG_compound_lock,       "compound_lock" },
 #endif
        {-1UL,                          NULL            },
 };