[tip:perf/core] perf symbols: Correct comment wrt kallsyms loading

[tip-bot for Cody P Schafer]

Commit-ID:  72f86204419e1b83f18b9bc2c97141a52dc534d2
Gitweb:     http://git.kernel.org/tip/72f86204419e1b83f18b9bc2c97141a52dc534d2
Author:     Cody P Schafer <cody@xxxxxxxxxxxxxxxxxx>
AuthorDate: Fri, 10 Aug 2012 15:22:47 -0700
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Mon, 13 Aug 2012 14:10:10 -0300

perf symbols: Correct comment wrt kallsyms loading

In kallsyms_parse() when calling process_symbol() (a callback argument
to kallsyms_parse()), we pass start as both start & end (ie:
start=start, end=start).

In map__process_kallsym_symbol(), the length is calculated as 'end -
start + 1', making the length 1, not 0.

Essentially, start & end define an inclusive range.

Signed-off-by: Cody P Schafer <cody@xxxxxxxxxxxxxxxxxx>
Cc: David Hansen <dave@xxxxxxxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Matt Hellsley <matthltc@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Sukadev Bhattiprolu <sukadev@xxxxxxxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1344637382-22789-2-git-send-email-cody@xxxxxxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/util/symbol.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 42c0d94..9f181a8 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -605,7 +605,7 @@ int kallsyms__parse(const char *filename, void *arg,
 
 		/*
 		 * module symbols are not sorted so we add all
-		 * symbols with zero length and rely on
+		 * symbols, setting length to 1, and rely on
 		 * symbols__fixup_end() to fix it up.
 		 */
 		err = process_symbol(arg, symbol_name,
--
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