linux-kernel - Re: [GIT PULL] hash addresses printed with %p

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Message-ID: <20171204093430.GA6463@kroah.com>
Date:   Mon, 4 Dec 2017 10:34:30 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Dave Young <dyoung@...hat.com>
Cc:     Matt Fleming <matt@...eblueprint.co.uk>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        "Tobin C. Harding" <me@...in.cc>,
        LKML <linux-kernel@...r.kernel.org>,
        "linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>
Subject: Re: [GIT PULL] hash addresses printed with %p

On Mon, Dec 04, 2017 at 05:29:28PM +0800, Dave Young wrote:
> On 12/04/17 at 08:36am, Greg Kroah-Hartman wrote:
> > On Mon, Dec 04, 2017 at 10:02:16AM +0800, Dave Young wrote:
> > > +#define __ATTR_IRUSR(_name) {						\
> > > +	.attr   = { .name = __stringify(_name), .mode = S_IRUSR },	\
> > > +	.show   = _name##_show,						\
> > > +}
> > 
> > Ick, no, as others, including Linus, have said, using IRUSER is a pain
> > in the ass to try to look up and remember what it is...
> > 
> > Just use __ATTR() please, it should be fine for what you need to do,
> > which is special-case a sysfs attribute.
> 
> Hmm, I was hesitating to do that because it needs either long code
> (over 80 chars) or some driver internal macros.
> 
> There is already same issue in dmi-sysfs.c, it uses an internal macro
> DMI_SYSFS_ATTR for 0400 attr.  I did not search all the kernel code,
> there might be more for such special cases. Maybe we can add some
> comment in sysfs.h to mention this is for some special case?
> 
> I can do something similar as dmi sysfs code though.

Hm, let me look at this this afternoon when I get through some stable
patches, it shouldn't be that complex to need a whole new macro...

thanks,

greg k-h