From d072c25f531c6513994960401d2c7f059434c0d2 Mon Sep 17 00:00:00 2001 From: Markus Metzger Date: Tue, 16 Dec 2008 15:53:11 +0100 Subject: x86, bts: correctly report invalid bts records Impact: change the reporting of empty BTS records Correctly report a cleared BTS record as invalid. Used to be reported as branch from 0 to 0. Signed-off-by: Markus Metzger Signed-off-by: Ingo Molnar --- arch/x86/kernel/ds.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch') diff --git a/arch/x86/kernel/ds.c b/arch/x86/kernel/ds.c index 0dc795951d7..98d271e60e0 100644 --- a/arch/x86/kernel/ds.c +++ b/arch/x86/kernel/ds.c @@ -484,6 +484,9 @@ static int bts_read(struct bts_tracer *tracer, const void *at, out->qualifier = bts_branch; out->variant.lbr.from = bts_get(at, bts_from); out->variant.lbr.to = bts_get(at, bts_to); + + if (!out->variant.lbr.from && !out->variant.lbr.to) + out->qualifier = bts_invalid; } return ds_cfg.sizeof_rec[ds_bts]; -- cgit v1.2.3-18-g5258