[LTP] [PATCH v4 2/2] pkey: add test for memory protection keys

[Jan Stancek <jstancek@redhat.com>]

----- Original Message -----
> +
> +static void setup(void)
> +{
> +	int i, fd;
> +
> +	if (access(PATH_VM_NRHPS, F_OK)) {
> +		tst_res(TINFO, "Huge page is not supported");
> +		size = getpagesize();
> +		no_hugepage = 1;
> +	} else {
> +		int val;
> +
> +		SAFE_FILE_PRINTF(PATH_VM_NRHPS, "%d", 1);

This is still SAFE write, which may trigger TBROK:

# ./pkey01 
tst_test.c:1100: INFO: Timeout per run is 0h 05m 00s
safe_file_ops.c:301: BROK: Failed to close FILE '/proc/sys/vm/nr_hugepages' at pkey01.c:67: EOPNOTSUPP
safe_macros.c:773: WARN: pkey01.c:91: umount(tmp_pkey) failed: ENOENT
safe_macros.c:184: WARN: pkey01.c:92: rmdir(tmp_pkey) failed: ENOENT

> +
> +		SAFE_FILE_SCANF(PATH_VM_NRHPS, "%d", &val);

safe_file_ops.c:157: BROK: The FILE '/proc/sys/vm/nr_hugepages' ended prematurely at pkey01.c:69

> +		if (val != 1)
> +			tst_brk(TBROK, "nr_hugepages = %d, but expect %d",
> +					val, 1);
> +
> +		size = SAFE_READ_MEMINFO("Hugepagesize:") * 1024;
> +	}
> +