linux-kernel - checkpatch suspected false positive

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 22 Feb 2017 10:01:48 +1100
From:   "Tobin C. Harding" <me@...in.cc>
To:     Andy Whitcroft <apw@...onical.com>, Joe Perches <joe@...ches.com>
Cc:     linux-kernel@...r.kernel.org
Subject: checkpatch suspected false positive

Checkpatch may be giving a false positive of type CONST_STRUCT when
parsing files in drivers/staging/comedi/drivers.

$ pwd
build/kernel/linux-trees/gregKH/staging/

$ cd drivers/staging/comedi/drivers

$ checkpatch --terse --show-types *.c | grep CONST_STRUCT
addi_apci_3501.c:97: WARNING:CONST_STRUCT: struct comedi_lrange should normally be const
das16.c:972: WARNING:CONST_STRUCT: struct comedi_lrange should normally be const
das16.c:1006: WARNING:CONST_STRUCT: struct comedi_lrange should normally be const
jr3_pci.c:659: WARNING:CONST_STRUCT: struct comedi_lrange should normally be const
jr3_pci.c:667: WARNING:CONST_STRUCT: struct comedi_lrange should normally be const
jr3_pci.c:668: WARNING:CONST_STRUCT: struct comedi_lrange should normally be const
ni_670x.c:212: WARNING:CONST_STRUCT: struct comedi_lrange should normally be const

snippet from das16.c

/* get any user-defined input range */
if (pg_type == das16_pg_none && (min || max)) {
	struct comedi_lrange *lrange;
	struct comedi_krange *krange;

	/* allocate single-range range table */
	lrange = comedi_alloc_spriv(s, sizeof(*lrange) + sizeof(*krange));
	if (!lrange)
		return &range_unknown;

	/* initialize ai range */
	lrange->length = 1;
	krange = lrange->range;
	krange->min = min;
	krange->max = max;
	krange->flags = UNIT_volt;

	return lrange;
}

>From snippet it may be seen that struct comedi_lrange *lrange should
not be const.

In the event that I am in the wrong and checkpatch is correct please
feel free to bluntly correct me.

thanks,
Tobin.