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x86, bts: correctly report invalid bts records

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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 <markus.t.metzger@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Markus Metzger 2008-12-16 15:53:11 +01:00 committed by Ingo Molnar
parent cc1dc6d039
commit d072c25f53
1 changed files with 3 additions and 0 deletions
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3
arch/x86/kernel/ds.c
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@ -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];