On Mon, Jan 05, 2015 at 03:12:38PM +0000, Daniel Thompson wrote: > Currently restore_user_regs deallocates the SVC stack early in > its execution and relies on no exception being taken between > the deallocation and the registers being restored. The introduction > of a default FIQ handler that also uses the SVC stack breaks this > assumption and can result in corrupted register state. > > This patch works around the problem by removing the early > stack deallocation and using r2 as a temporary instead. I have > not found a way to do this without introducing an extra mov > instruction to the macro. > > Signed-off-by: Daniel Thompson <[email protected]> > ---
Please put it in the patch system, thanks. I think we should queue this one for stable too, as I think we need this for v3.18 (as a result of c0e7f7ee717e2b4c5791e7422424c96b5008c39e, ARM: 8150/3: fiq: Replace default FIQ handler)? -- FTTC broadband for 0.8mile line: currently at 10.5Mbps down 400kbps up according to speedtest.net. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
