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tracing: Change STR_VAR_MAX_LEN

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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 <axelrasmussen@google.com>
Signed-off-by: Tom Zanussi <zanussi@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Tom Zanussi 2020-10-04 17:14:03 -05:00 committed by Steven Rostedt (VMware)
parent fdda88d31a
commit 4a4a56b4e7
2 changed files with 3 additions and 1 deletions
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2
kernel/trace/trace_events_hist.c
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@ -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++) {

2
kernel/trace/trace_synth.h
View file

@ -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;