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kselftest/arm64: mte: ksm_options: Fix fscanf warning

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Out of the box Ubuntu's 20.04 compiler warns about missing return value
checks for fscanf() calls.

Make GCC happy by checking whether we actually parsed one integer.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Mark Brown <broone@kernel.org>
Link: https://lore.kernel.org/r/20210319165334.29213-4-andre.przywara@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Andre Przywara 2021-03-19 16:53:26 +00:00 committed by Catalin Marinas
parent e5decefd88
commit 31c88729a7
1 changed files with 4 additions and 1 deletions
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5
tools/testing/selftests/arm64/mte/check_ksm_options.c
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@ -33,7 +33,10 @@ static unsigned long read_sysfs(char *str)
ksft_print_msg("ERR: missing %s\n", str);
return 0;
}
fscanf(f, "%lu", &val);
if (fscanf(f, "%lu", &val) != 1) {
ksft_print_msg("ERR: parsing %s\n", str);
val = 0;
}
fclose(f);
return val;
}