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Groups > linux.kernel > #1737803

[PATCH 7/9] tracing: Clean up hist_field_flags enum

From Tom Zanussi <tom.zanussi@linux.intel.com>
Newsgroups linux.kernel
Subject [PATCH 7/9] tracing: Clean up hist_field_flags enum
Date 2017-09-22 22:10 +0200
Message-ID <usCqT-21j-25@gated-at.bofh.it> (permalink)
References <usChc-1IF-9@gated-at.bofh.it>
Organization linux.* mail to news gateway

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As we add more flags, specifying explicit integers for the flag values
becomes more unwieldy and error-prone - switch them over to left-shift
values.

Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
---
 kernel/trace/trace_events_hist.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index 7eb975a..4f6b640 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -110,16 +110,16 @@ static u64 hist_field_log2(struct hist_field *hist_field, void *event)
 #define HIST_KEY_SIZE_MAX	(MAX_FILTER_STR_VAL + HIST_STACKTRACE_SIZE)
 
 enum hist_field_flags {
-	HIST_FIELD_FL_HITCOUNT		= 1,
-	HIST_FIELD_FL_KEY		= 2,
-	HIST_FIELD_FL_STRING		= 4,
-	HIST_FIELD_FL_HEX		= 8,
-	HIST_FIELD_FL_SYM		= 16,
-	HIST_FIELD_FL_SYM_OFFSET	= 32,
-	HIST_FIELD_FL_EXECNAME		= 64,
-	HIST_FIELD_FL_SYSCALL		= 128,
-	HIST_FIELD_FL_STACKTRACE	= 256,
-	HIST_FIELD_FL_LOG2		= 512,
+	HIST_FIELD_FL_HITCOUNT		= 1 << 0,
+	HIST_FIELD_FL_KEY		= 1 << 1,
+	HIST_FIELD_FL_STRING		= 1 << 2,
+	HIST_FIELD_FL_HEX		= 1 << 3,
+	HIST_FIELD_FL_SYM		= 1 << 4,
+	HIST_FIELD_FL_SYM_OFFSET	= 1 << 5,
+	HIST_FIELD_FL_EXECNAME		= 1 << 6,
+	HIST_FIELD_FL_SYSCALL		= 1 << 7,
+	HIST_FIELD_FL_STACKTRACE	= 1 << 8,
+	HIST_FIELD_FL_LOG2		= 1 << 9,
 };
 
 struct hist_trigger_attrs {
-- 
1.9.3

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Thread

[PATCH 0/9] tracing: Bug fixes and minor cleanup Tom Zanussi <tom.zanussi@linux.intel.com> - 2017-09-22 22:00 +0200
  [PATCH 5/9] tracing: Increase tracing map KEYS_MAX size Tom Zanussi <tom.zanussi@linux.intel.com> - 2017-09-22 22:00 +0200
  [PATCH 3/9] tracing: Exclude 'generic fields' from histograms Tom Zanussi <tom.zanussi@linux.intel.com> - 2017-09-22 22:00 +0200
  [PATCH 1/9] tracing: Steve's unofficial trace_recursive_lock() patch Tom Zanussi <tom.zanussi@linux.intel.com> - 2017-09-22 22:00 +0200
  [PATCH 4/9] tracing: Remove lookups from tracing_map hitcount Tom Zanussi <tom.zanussi@linux.intel.com> - 2017-09-22 22:00 +0200
  [PATCH 9/9] tracing: Reimplement log2 Tom Zanussi <tom.zanussi@linux.intel.com> - 2017-09-22 22:10 +0200
  [PATCH 7/9] tracing: Clean up hist_field_flags enum Tom Zanussi <tom.zanussi@linux.intel.com> - 2017-09-22 22:10 +0200
  [PATCH 8/9] tracing: Add hist_field_name() accessor Tom Zanussi <tom.zanussi@linux.intel.com> - 2017-09-22 22:10 +0200
  [PATCH 2/9] tracing: Reverse the order of trace_types_lock and event_mutex Tom Zanussi <tom.zanussi@linux.intel.com> - 2017-09-22 22:20 +0200

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