On 11/18/2010 08:04 AM, tip-bot for Frederic Weisbecker wrote: > Commit-ID: 6c0aca288e726405b01dacb12cac556454d34b2a > Gitweb: http://git.kernel.org/tip/6c0aca288e726405b01dacb12cac556454d34b2a > Author: Frederic Weisbecker <fweisbec@xxxxxxxxx> > AuthorDate: Thu, 11 Nov 2010 21:18:43 +0100 > Committer: Frederic Weisbecker <fweisbec@xxxxxxxxx> > CommitDate: Fri, 12 Nov 2010 14:51:01 +0100 > > x86: Ignore trap bits on single step exceptions > > When a single step exception fires, the trap bits, used to > signal hardware breakpoints, are in a random state. > > These trap bits might be set if another exception will follow, > like a breakpoint in the next instruction, or a watchpoint in the > previous one. Or there can be any junk there. > > So if we handle these trap bits during the single step exception, > we are going to handle an exception twice, or we are going to > handle junk. > > Just ignore them in this case. > > This fixes https://bugzilla.kernel.org/show_bug.cgi?id=21332 > > Reported-by: Michael Stefaniuc <mstefani@xxxxxxxxxx> > Signed-off-by: Frederic Weisbecker <fweisbec@xxxxxxxxx> > Cc: Rafael J. Wysocki <rjw@xxxxxxx> > Cc: Maciej Rutecki <maciej.rutecki@xxxxxxxxx> > Cc: Alexandre Julliard <julliard@xxxxxxxxxx> > Cc: Jason Wessel <jason.wessel@xxxxxxxxxxxxx> > Thankfully no more new kgdb regressions here :-) Tested-by: Jason Wessel <jason.wessel@xxxxxxxxxxxxx> Thanks, Jason. -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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