diff options
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/trace.c | 10 | ||||
| -rw-r--r-- | kernel/trace/trace_events_user.c | 22 | ||||
| -rw-r--r-- | kernel/trace/trace_output.c | 6 |
3 files changed, 19 insertions, 19 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index d1e527cf2aae..304e93597126 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -8781,8 +8781,18 @@ static void tracing_buffers_mmap_close(struct vm_area_struct *vma) put_snapshot_map(iter->tr); } +static int tracing_buffers_may_split(struct vm_area_struct *vma, unsigned long addr) +{ + /* + * Trace buffer mappings require the complete buffer including + * the meta page. Partial mappings are not supported. + */ + return -EINVAL; +} + static const struct vm_operations_struct tracing_buffers_vmops = { .close = tracing_buffers_mmap_close, + .may_split = tracing_buffers_may_split, }; static int tracing_buffers_mmap(struct file *filp, struct vm_area_struct *vma) diff --git a/kernel/trace/trace_events_user.c b/kernel/trace/trace_events_user.c index c428dafe7496..b15854c75d4f 100644 --- a/kernel/trace/trace_events_user.c +++ b/kernel/trace/trace_events_user.c @@ -1449,12 +1449,7 @@ static struct trace_event_functions user_event_funcs = { static int user_event_set_call_visible(struct user_event *user, bool visible) { - int ret; - const struct cred *old_cred; - struct cred *cred; - - cred = prepare_creds(); - + CLASS(prepare_creds, cred)(); if (!cred) return -ENOMEM; @@ -1469,17 +1464,12 @@ static int user_event_set_call_visible(struct user_event *user, bool visible) */ cred->fsuid = GLOBAL_ROOT_UID; - old_cred = override_creds(cred); - - if (visible) - ret = trace_add_event_call(&user->call); - else - ret = trace_remove_event_call(&user->call); - - revert_creds(old_cred); - put_cred(cred); + scoped_with_creds(cred) { + if (visible) + return trace_add_event_call(&user->call); - return ret; + return trace_remove_event_call(&user->call); + } } static int destroy_user_event(struct user_event *user) diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c index 97db0b0ccf3e..14f86f0a8bc7 100644 --- a/kernel/trace/trace_output.c +++ b/kernel/trace/trace_output.c @@ -1467,12 +1467,12 @@ trace_hwlat_print(struct trace_iterator *iter, int flags, trace_assign_type(field, entry); - trace_seq_printf(s, "#%-5u inner/outer(us): %4llu/%-5llu ts:%lld.%09ld count:%d", + trace_seq_printf(s, "#%-5u inner/outer(us): %4llu/%-5llu ts:%ptSp count:%d", field->seqnum, field->duration, field->outer_duration, - (long long)field->timestamp.tv_sec, - field->timestamp.tv_nsec, field->count); + &field->timestamp, + field->count); if (field->nmi_count) { /* |