On Wed, Apr 02, 2014 at 08:54:01PM +0000, Linux Kernel wrote:
 > Gitweb:     
 > http://git.kernel.org/linus/;a=commit;h=4029cd66545f0a45258eda5313b7559bfeaaaae4
 > Commit:     4029cd66545f0a45258eda5313b7559bfeaaaae4
 > Parent:     8d724823220862ce289be3b50119235e03537597
 > Author:     Neelesh Gupta <neele...@linux.vnet.ibm.com>
 > AuthorDate: Fri Mar 7 11:02:09 2014 +0530
 > Committer:  Benjamin Herrenschmidt <b...@kernel.crashing.org>
 > CommitDate: Mon Mar 24 09:47:30 2014 +1100
 > 
 >     powerpc/powernv: Enable reading and updating of system parameters
 >     
 >     This patch enables reading and updating of system parameters through
 >     OPAL call.
 >     
 
 ...

 > +            /* If the parameter is read-only or read-write */
 > +            switch (perm[i] & 3) {
 > +            case OPAL_SYSPARAM_READ:
 > +                    attr[i].kobj_attr.attr.mode = S_IRUGO;
 > +                    break;
 > +            case OPAL_SYSPARAM_WRITE:
 > +                    attr[i].kobj_attr.attr.mode = S_IWUGO;
 > +                    break;
 > +            case OPAL_SYSPARAM_RW:
 > +                    attr[i].kobj_attr.attr.mode = S_IRUGO | S_IWUGO;
 > +                    break;
 > +            default:
 > +                    break;
 
Is world-writable really appropriate for this ?

        Dave
 
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