On Fri, 8 May 2015, Dave Hansen wrote: > From: Dave Hansen <[email protected]> > > get_xsave_addr() assumes that if an xsave bit is present in the > hardware (pcntxt_mask) that it is present in a given xsave > buffer. Due to an bug in the xsave code on all of the systems > that have MPX (and thus all the users of this code), that has > been a true assumption. > > But, the bug is getting fixed, so our assumption is not going > to hold any more. > > It's quite possible (and normal) for an enabled state to be > present on 'pcntxt_mask', but *not* in 'xstate_bv'. We need > to consult 'xstate_bv'. > > Signed-off-by: Dave Hansen <[email protected]>
Reviewed-by: Thomas Gleixner <[email protected]> -- 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/
