diff options
Diffstat (limited to '')
| -rw-r--r-- | tools/perf/util/mem2node.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/tools/perf/util/mem2node.c b/tools/perf/util/mem2node.c index 797d86a1ab09..03a7d7b27737 100644 --- a/tools/perf/util/mem2node.c +++ b/tools/perf/util/mem2node.c @@ -1,5 +1,6 @@ #include <errno.h> #include <inttypes.h> +#include <asm/bug.h> #include <linux/bitmap.h> #include <linux/kernel.h> #include <linux/zalloc.h> @@ -95,7 +96,8 @@ int mem2node__init(struct mem2node *map, struct perf_env *env) /* Cut unused entries, due to merging. */ tmp_entries = realloc(entries, sizeof(*entries) * j); - if (tmp_entries) + if (tmp_entries || + WARN_ONCE(j == 0, "No memory nodes, is CONFIG_MEMORY_HOTPLUG enabled?\n")) entries = tmp_entries; for (i = 0; i < j; i++) { |