linux-kernel - RE: [RFC][PATCH 7/7] kref: Implement using refcount

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 for Android: free password hash cracker in your pocket

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

Message-ID: <2236FBA76BA1254E88B949DDB74E612B41C14924@IRSMSX102.ger.corp.intel.com>
Date:   Fri, 18 Nov 2016 10:47:40 +0000
From:   "Reshetova, Elena" <elena.reshetova@...el.com>
To:     Peter Zijlstra <peterz@...radead.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "keescook@...omium.org" <keescook@...omium.org>,
        "will.deacon@....com" <will.deacon@....com>,
        "arnd@...db.de" <arnd@...db.de>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...nel.org" <mingo@...nel.org>,
        "hpa@...or.com" <hpa@...or.com>,
        "dave@...gbits.org" <dave@...gbits.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [RFC][PATCH 7/7] kref: Implement using refcount_t

>Provide refcount_t, an atomic_t like primitive built just for refcounting.
>It provides overflow and underflow checks as well as saturation semantics such that when it overflows, we'll never attempt to free it again, ever.

>Peter do you have the changes to the refcount_t interface compare to the version in this patch? 
>We are now starting working on atomic_t --> refcount_t conversions and it would save a bit of work to have latest version from you that we can be based upon. 

Oh, and if we define refcount_t to be just atomic_t underneath, what about the other atomic_long_t, local_t and atomic64_t cases when it is used for recounting? 
I don't feel good just simply changing them to become atomic_t under refcount_t wrapper.....