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selftests:kvm: fix get_trans_hugepagesz() ignoring fscanf() return warn

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Fix get_trans_hugepagesz() to check fscanf() return value to get rid
of the following warning:

lib/test_util.c: In function ‘get_trans_hugepagesz’:
lib/test_util.c:138:2: warning: ignoring return value of ‘fscanf’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  138 |  fscanf(f, "%ld", &size);
      |  ^~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
Shuah Khan 2021-09-15 15:28:07 -06:00
parent 39a71f712d
commit 3a4f0cc693
1 changed files with 4 additions and 1 deletions
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5
tools/testing/selftests/kvm/lib/test_util.c
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@ -129,13 +129,16 @@ size_t get_trans_hugepagesz(void)
{
size_t size;
FILE *f;
int ret;
TEST_ASSERT(thp_configured(), "THP is not configured in host kernel");
f = fopen("/sys/kernel/mm/transparent_hugepage/hpage_pmd_size", "r");
TEST_ASSERT(f != NULL, "Error in opening transparent_hugepage/hpage_pmd_size");
fscanf(f, "%ld", &size);
ret = fscanf(f, "%ld", &size);
ret = fscanf(f, "%ld", &size);
TEST_ASSERT(ret < 1, "Error reading transparent_hugepage/hpage_pmd_size");
fclose(f);
return size;