* Catalin Marinas <catalin.marinas@xxxxxxx> [110128 07:11]: > On Fri, 2011-01-28 at 13:21 +0000, Russell King - ARM Linux wrote: > > On Fri, Jan 28, 2011 at 12:25:18PM +0000, Catalin Marinas wrote: > > > With your latest patches, do we use the TLS emulation on ARMv7 (UP) if > > > v6 is compiled in? If that's the case, we may have a problem - I talked > > > to the toolchain guys and it looks like code optimised for ARMv7 reads > > > the TLS register directly without going through the kuser helper. So you > > > may have people taking an Ubuntu filesystem (v7 only) and a pre-built > > > OMAP image with TLS emulation even on Cortex-A8 and things won't work as > > > expected. > > > > You're really making a mountain out of TLS. > > Not really, just asking for clarification as I haven't checked all your > patches recently. > > > If we have a v6+v6k+v7 kernel, then the way the kernel TLS code is built, > > we will use the TLS register if that's available on the hardware. If it > > isn't, we will write the TLS value directly to virtual 0xffff0ffc. > > > > So, a kernel built for v6+v6k+v7, when run on v7, will set the hardware > > TLS register, and your v7 optimized binaries which access the TLS register > > directly will work. Same for v6k. > > Great. Yes AFAIK we sorted out the TLS issue already a while back for v6+v6k+v7. Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
