git.ipfire.org Git - thirdparty/kernel/stable-queue.git/blob

   1 From foo@baz Thu Dec 14 21:30:47 CET 2017
   2 From: Randy Dunlap <rdunlap@infradead.org>
   3 Date: Fri, 17 Nov 2017 15:27:35 -0800
   4 Subject: dynamic-debug-howto: fix optional/omitted ending line number to be LARGE instead of 0
   5
   6 From: Randy Dunlap <rdunlap@infradead.org>
   7
   8
   9 [ Upstream commit 1f3c790bd5989fcfec9e53ad8fa09f5b740c958f ]
  10
  11 line-range is supposed to treat "1-" as "1-endoffile", so
  12 handle the special case by setting last_lineno to UINT_MAX.
  13
  14 Fixes this error:
  15
  16   dynamic_debug:ddebug_parse_query: last-line:0 < 1st-line:1
  17   dynamic_debug:ddebug_exec_query: query parse failed
  18
  19 Link: http://lkml.kernel.org/r/10a6a101-e2be-209f-1f41-54637824788e@infradead.org
  20 Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
  21 Acked-by: Jason Baron <jbaron@akamai.com>
  22 Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
  23 Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
  24 Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
  25 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  26 ---
  27  lib/dynamic_debug.c |    4 ++++
  28  1 file changed, 4 insertions(+)
  29
  30 --- a/lib/dynamic_debug.c
  31 +++ b/lib/dynamic_debug.c
  32 @@ -353,6 +353,10 @@ static int ddebug_parse_query(char *word
  33                                 if (parse_lineno(last, &query->last_lineno) < 0)
  34                                         return -EINVAL;
  35
  36 +                               /* special case for last lineno not specified */
  37 +                               if (query->last_lineno == 0)
  38 +                                       query->last_lineno = UINT_MAX;
  39 +
  40                                 if (query->last_lineno < query->first_lineno) {
  41                                         pr_err("last-line:%d < 1st-line:%d\n",
  42                                                 query->last_lineno,