HIST_STACKTRACE_DEPTH
#define HIST_STACKTRACE_SIZE (HIST_STACKTRACE_DEPTH * sizeof(unsigned long))
BUILD_BUG_ON((HIST_STACKTRACE_DEPTH + 1) * sizeof(long) > STR_VAR_LEN_MAX);
HIST_STACKTRACE_DEPTH,
if (e < HIST_STACKTRACE_DEPTH - 1)
key_size = sizeof(unsigned long) * HIST_STACKTRACE_DEPTH;
HIST_STACKTRACE_DEPTH,
if (e < HIST_STACKTRACE_DEPTH - 1)
unsigned long entries[HIST_STACKTRACE_DEPTH];
stack_trace_save(entries, HIST_STACKTRACE_DEPTH,
HIST_STACKTRACE_DEPTH);
for (len = 0; len < HIST_STACKTRACE_DEPTH; len++) {