From mboxrd@z Thu Jan 1 00:00:00 1970 From: mans@mansr.com (=?iso-8859-1?Q?M=E5ns_Rullg=E5rd?=) Date: Mon, 02 Nov 2015 18:30:29 +0000 Subject: [PATCH v8 2/2] arm-soc: Add support for arm-based tango4 platforms In-Reply-To: <20151102182615.GI2684@leverpostej> (Mark Rutland's message of "Mon, 2 Nov 2015 18:26:15 +0000") References: <56377E76.2080209@sigmadesigns.com> <56377F09.6050805@sigmadesigns.com> <20151102182615.GI2684@leverpostej> Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Mark Rutland writes: >> > +ENTRY(tango_smc) >> > + push {lr} >> > + mov ip, r1 >> > + dsb >> >> Did you ever get a straight answer on the dsb here? > > We didn't. Having a look just now, the earliest example appears to be > in OMAP4 L2 support patches back in 2009 [1]. I was not able to find a > rationale. My guess is it was added out of frustration during early OMAP development and forgotten. Then it became cargo cult. -- M?ns Rullg?rd mans at mansr.com