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selftests/powerpc: Fix compile error on tlbie_test due to newer gcc

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commit 5b216ea1c4 upstream.

Newer versions of GCC (>= 9) demand that the size of the string to be
copied must be explicitly smaller than the size of the destination.
Thus, the NULL char has to be taken into account on strncpy.

This will avoid the following compiling error:

  tlbie_test.c: In function 'main':
  tlbie_test.c:639:4: error: 'strncpy' specified bound 100 equals destination size
      strncpy(logdir, optarg, LOGDIR_NAME_SIZE);
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  cc1: all warnings being treated as errors

Signed-off-by: Desnes A. Nunes do Rosario <desnesn@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20191003211010.9711-1-desnesn@linux.ibm.com
[sandipan: Backported to v4.19]
Signed-off-by: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Desnes A. Nunes do Rosario 2019-10-03 18:10:10 -03:00 committed by Greg Kroah-Hartman
parent e7aaa8dd60
commit 3ddf2a70cf
1 changed files with 1 additions and 1 deletions
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2
tools/testing/selftests/powerpc/mm/tlbie_test.c
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@ -636,7 +636,7 @@ int main(int argc, char *argv[])
nrthreads = strtoul(optarg, NULL, 10);
break;
case 'l':
strncpy(logdir, optarg, LOGDIR_NAME_SIZE);
strncpy(logdir, optarg, LOGDIR_NAME_SIZE - 1);
break;
case 't':
run_time = strtoul(optarg, NULL, 10);