linux-kernel - Re: [PATCH V2 01/10] Documentation: dt-bindings: mailbox: tegra: Add binding for HSP mailbox

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

Date:	Thu, 7 Jul 2016 11:44:29 -0700
From:	Sivaram Nair <sivaramn@...dia.com>
To:	Stephen Warren <swarren@...dotorg.org>
CC:	Joseph Lo <josephl@...dia.com>,
	Thierry Reding <thierry.reding@...il.com>,
	Alexandre Courbot <gnurou@...il.com>,
	<linux-tegra@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	Rob Herring <robh+dt@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Peter De Schrijver <pdeschrijver@...dia.com>,
	Matthew Longnecker <MLongnecker@...dia.com>,
	<devicetree@...r.kernel.org>,
	Jassi Brar <jassisinghbrar@...il.com>,
	<linux-kernel@...r.kernel.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>
Subject: Re: [PATCH V2 01/10] Documentation: dt-bindings: mailbox: tegra: Add
 binding for HSP mailbox

On Thu, Jul 07, 2016 at 12:35:02PM -0600, Stephen Warren wrote:
> On 07/07/2016 12:13 PM, Sivaram Nair wrote:
> >On Tue, Jul 05, 2016 at 05:04:22PM +0800, Joseph Lo wrote:
> >>Add DT binding for the Hardware Synchronization Primitives (HSP). The
> >>HSP is designed for the processors to share resources and communicate
> >>together. It provides a set of hardware synchronization primitives for
> >>interprocessor communication. So the interprocessor communication (IPC)
> >>protocols can use hardware synchronization primitive, when operating
> >>between two processors not in an SMP relationship.
> 
> >>diff --git a/include/dt-bindings/mailbox/tegra186-hsp.h b/include/dt-bindings/mailbox/tegra186-hsp.h
> 
> >>+#define HSP_MBOX_TYPE_DB 0x0
> >>+#define HSP_MBOX_TYPE_SM 0x1
> >>+#define HSP_MBOX_TYPE_SS 0x2
> >>+#define HSP_MBOX_TYPE_AS 0x3
> >>+
> >>+#define HSP_DB_MASTER_CCPLEX 17
> >>+#define HSP_DB_MASTER_BPMP 19
> >>+
> >>+#define HSP_MBOX_ID(type, ID) \
> >>+		(HSP_MBOX_TYPE_##type << 16 | ID)
> >
> >It will be nicer if you avoid the macro glue magic '##' for 'type'. I
> >would also suggest to use braces around 'type' and 'ID'.
> 
> This technique been used without issue in quite a few other places
> without issue, and has the benefit of simplifying the text wherever
> the macro is used. What issue do you foresee?

It improves readability where HSP_MBOX_ID is used (in tegra186.dtsi file
in this case) - but consider this as a cosmetic comment.

> 
> BTW, if this patch does need reposting, I'd suggest s/ID/id/ since
> macro parameters are usually lower-case.