From: Tom Zanussi Date: Sun, 4 Oct 2020 22:14:03 +0000 (-0500) Subject: tracing: Change STR_VAR_MAX_LEN X-Git-Tag: microblaze-v5.11~35^2~29 X-Git-Url: http://git.monstr.eu/?a=commitdiff_plain;h=4a4a56b4e76bbe3211c4f93d99c0c1543f5f3230;p=linux-2.6-microblaze.git tracing: Change STR_VAR_MAX_LEN 32 is too small for this value, and anyway it makes more sense to use MAX_FILTER_STR_VAL, as this is also the value used for variable-length __strings. Link: https://lkml.kernel.org/r/6adfd1668ac1fd8670bd58206944a762061a5559.1601848695.git.zanussi@kernel.org Tested-by: Axel Rasmussen Signed-off-by: Tom Zanussi Signed-off-by: Steven Rostedt (VMware) --- diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c index 1b2ef6490229..3b22e2122d1a 100644 --- a/kernel/trace/trace_events_hist.c +++ b/kernel/trace/trace_events_hist.c @@ -1398,6 +1398,8 @@ static int hist_trigger_elt_data_alloc(struct tracing_map_elt *elt) n_str = hist_data->n_field_var_str + hist_data->n_save_var_str; + BUILD_BUG_ON(STR_VAR_LEN_MAX & (sizeof(u64) - 1)); + size = STR_VAR_LEN_MAX; for (i = 0; i < n_str; i++) { diff --git a/kernel/trace/trace_synth.h b/kernel/trace/trace_synth.h index ac35c45207c4..5166705d1556 100644 --- a/kernel/trace/trace_synth.h +++ b/kernel/trace/trace_synth.h @@ -7,7 +7,7 @@ #define SYNTH_SYSTEM "synthetic" #define SYNTH_FIELDS_MAX 32 -#define STR_VAR_LEN_MAX 32 /* must be multiple of sizeof(u64) */ +#define STR_VAR_LEN_MAX MAX_FILTER_STR_VAL /* must be multiple of sizeof(u64) */ struct synth_field { char *type;