linux-kernel - Re: sizeof (struct tYpO *) : it is just a typo or rather a bug ?

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Message-ID: <53D15280.5070407@gmx.de>
Date:	Thu, 24 Jul 2014 20:37:52 +0200
From:	Toralf Förster <toralf.foerster@....de>
To:	Ilya Dryomov <ilya.dryomov@...tank.com>
CC:	linux-ia64@...r.kernel.org,
	Ceph Development <ceph-devel@...r.kernel.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: sizeof (struct tYpO *) : it is just a typo or rather a bug ?

On 07/24/2014 08:33 PM, Ilya Dryomov wrote:
> On Thu, Jul 24, 2014 at 10:20 PM, Toralf Förster <toralf.foerster@....de> wrote:
>> Inspired by this "typo" fix
>> http://article.gmane.org/gmane.linux.kernel/1754640
>> I grep'ed the current git tree of linus for similar issues.
>>
>> For these 4 places I'm wondering where the appropriate struct definition is located :
>>
>> arch/ia64/sn/kernel/io_acpi_init.c:         sizeof(struct pci_devdev_info *)) {
>> tools/perf/builtin-sched.c:     sched->tasks = realloc(sched->tasks, sched->nr_tasks * sizeof(struct task_task *));
>> fs/ceph/xattr.c:                xattrs = kcalloc(numattr, sizeof(struct ceph_xattr *),
>> fs/ceph/xattr.c:                memset(xattrs, 0, numattr*sizeof(struct ceph_xattr *));
> 
> Heh, the ceph one is a five year old typo..  Looks like it should be
> struct ceph_inode_xattr, I'll fix it up.  I'm curious though, how did
> you grep for these?
> 
> Thanks,
> 
>                 Ilya
> 

1:
	grep -Hr "sizeof[ *(]struct .* \*.)"  | cut -f2- -d':' | tee ~/tmp/out

2:
	cat ~/tmp/out | perl -wane 'chomp(); my ($left, $right) = split (/sizeof\(/); print $right, "\n";' | cut -f2 -d' ' | sort -u | cut -f1 -d')' | grep -v '^+' | while read i; do echo $i; git grep -q "struct $i {" || echo error; echo; done

3:
	ignore false positives

-- 
Toralf

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