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author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-14 10:49:03 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-14 10:49:03 -0700 |
commit | eeee78cf77df0450ca285a7cd6d73842181e825c (patch) | |
tree | 330540323eae82977756e5086492654b9e461871 /include/trace/events/random.h | |
parent | Merge tag 'trace-4.1-tracefs' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace (diff) | |
parent | tracing: Add enum_map file to show enums that have been mapped (diff) | |
download | linux-dev-eeee78cf77df0450ca285a7cd6d73842181e825c.tar.xz linux-dev-eeee78cf77df0450ca285a7cd6d73842181e825c.zip |
Merge tag 'trace-v4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing updates from Steven Rostedt:
"Some clean ups and small fixes, but the biggest change is the addition
of the TRACE_DEFINE_ENUM() macro that can be used by tracepoints.
Tracepoints have helper functions for the TP_printk() called
__print_symbolic() and __print_flags() that lets a numeric number be
displayed as a a human comprehensible text. What is placed in the
TP_printk() is also shown in the tracepoint format file such that user
space tools like perf and trace-cmd can parse the binary data and
express the values too. Unfortunately, the way the TRACE_EVENT()
macro works, anything placed in the TP_printk() will be shown pretty
much exactly as is. The problem arises when enums are used. That's
because unlike macros, enums will not be changed into their values by
the C pre-processor. Thus, the enum string is exported to the format
file, and this makes it useless for user space tools.
The TRACE_DEFINE_ENUM() solves this by converting the enum strings in
the TP_printk() format into their number, and that is what is shown to
user space. For example, the tracepoint tlb_flush currently has this
in its format file:
__print_symbolic(REC->reason,
{ TLB_FLUSH_ON_TASK_SWITCH, "flush on task switch" },
{ TLB_REMOTE_SHOOTDOWN, "remote shootdown" },
{ TLB_LOCAL_SHOOTDOWN, "local shootdown" },
{ TLB_LOCAL_MM_SHOOTDOWN, "local mm shootdown" })
After adding:
TRACE_DEFINE_ENUM(TLB_FLUSH_ON_TASK_SWITCH);
TRACE_DEFINE_ENUM(TLB_REMOTE_SHOOTDOWN);
TRACE_DEFINE_ENUM(TLB_LOCAL_SHOOTDOWN);
TRACE_DEFINE_ENUM(TLB_LOCAL_MM_SHOOTDOWN);
Its format file will contain this:
__print_symbolic(REC->reason,
{ 0, "flush on task switch" },
{ 1, "remote shootdown" },
{ 2, "local shootdown" },
{ 3, "local mm shootdown" })"
* tag 'trace-v4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (27 commits)
tracing: Add enum_map file to show enums that have been mapped
writeback: Export enums used by tracepoint to user space
v4l: Export enums used by tracepoints to user space
SUNRPC: Export enums in tracepoints to user space
mm: tracing: Export enums in tracepoints to user space
irq/tracing: Export enums in tracepoints to user space
f2fs: Export the enums in the tracepoints to userspace
net/9p/tracing: Export enums in tracepoints to userspace
x86/tlb/trace: Export enums in used by tlb_flush tracepoint
tracing/samples: Update the trace-event-sample.h with TRACE_DEFINE_ENUM()
tracing: Allow for modules to convert their enums to values
tracing: Add TRACE_DEFINE_ENUM() macro to map enums to their values
tracing: Update trace-event-sample with TRACE_SYSTEM_VAR documentation
tracing: Give system name a pointer
brcmsmac: Move each system tracepoints to their own header
iwlwifi: Move each system tracepoints to their own header
mac80211: Move message tracepoints to their own header
tracing: Add TRACE_SYSTEM_VAR to xhci-hcd
tracing: Add TRACE_SYSTEM_VAR to kvm-s390
tracing: Add TRACE_SYSTEM_VAR to intel-sst
...
Diffstat (limited to 'include/trace/events/random.h')
-rw-r--r-- | include/trace/events/random.h | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/include/trace/events/random.h b/include/trace/events/random.h index 805af6db41cc..4684de344c5d 100644 --- a/include/trace/events/random.h +++ b/include/trace/events/random.h @@ -22,7 +22,7 @@ TRACE_EVENT(add_device_randomness, __entry->IP = IP; ), - TP_printk("bytes %d caller %pF", + TP_printk("bytes %d caller %pS", __entry->bytes, (void *)__entry->IP) ); @@ -43,7 +43,7 @@ DECLARE_EVENT_CLASS(random__mix_pool_bytes, __entry->IP = IP; ), - TP_printk("%s pool: bytes %d caller %pF", + TP_printk("%s pool: bytes %d caller %pS", __entry->pool_name, __entry->bytes, (void *)__entry->IP) ); @@ -82,7 +82,7 @@ TRACE_EVENT(credit_entropy_bits, ), TP_printk("%s pool: bits %d entropy_count %d entropy_total %d " - "caller %pF", __entry->pool_name, __entry->bits, + "caller %pS", __entry->pool_name, __entry->bits, __entry->entropy_count, __entry->entropy_total, (void *)__entry->IP) ); @@ -207,7 +207,7 @@ DECLARE_EVENT_CLASS(random__get_random_bytes, __entry->IP = IP; ), - TP_printk("nbytes %d caller %pF", __entry->nbytes, (void *)__entry->IP) + TP_printk("nbytes %d caller %pS", __entry->nbytes, (void *)__entry->IP) ); DEFINE_EVENT(random__get_random_bytes, get_random_bytes, @@ -242,7 +242,7 @@ DECLARE_EVENT_CLASS(random__extract_entropy, __entry->IP = IP; ), - TP_printk("%s pool: nbytes %d entropy_count %d caller %pF", + TP_printk("%s pool: nbytes %d entropy_count %d caller %pS", __entry->pool_name, __entry->nbytes, __entry->entropy_count, (void *)__entry->IP) ); |