On Fri, Mar 26, 2010 at 04:49:10PM -0700, Yinghai Lu wrote: > On 03/26/2010 04:42 PM, Johannes Weiner wrote: > > On Fri, Mar 26, 2010 at 03:21:33PM -0700, Yinghai Lu wrote: > >> From: Ian Campbell <ian.campbell@xxxxxxxxxx> > >> > >> This avoids an infinite loop in free_early_partial(). > >> > >> Add a warning to free_early_partial to catch future problems. > >> > >> -v5: put back start > end back into WARN_ONCE() > >> -v6: use one line for warning according to linus > >> -v7: more test by > >> > >> Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx> > >> Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx> > >> Tested-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> > >> Tested-by: Joel Becker <joel.becker@xxxxxxxxxx> > >> Tested-by: Stanislaw Gruszka <sgruszka@xxxxxxxxxx> > >> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > >> Cc: Ingo Molnar <mingo@xxxxxxx> > >> --- > >> kernel/early_res.c | 6 ++++++ > >> 1 files changed, 6 insertions(+), 0 deletions(-) > >> > >> diff --git a/kernel/early_res.c b/kernel/early_res.c > >> index 3cb2c66..69bed5b 100644 > >> --- a/kernel/early_res.c > >> +++ b/kernel/early_res.c > >> @@ -333,6 +333,12 @@ void __init free_early_partial(u64 start, u64 end) > >> struct early_res *r; > >> int i; > >> > >> + if (start == end) > >> + return; > >> + > >> + if (WARN_ONCE(start > end, "free_early_partial: wrong range [%#llx, %#llx]\n", start, end)) > >> + return; > > > > I think you can drop the function name, it will be in the stack dump > > anyway. And that would get the line back into bounds :) > > > > Other than that, > > Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx> > > Thanks. > > is there any chance that dump stack only print out address instead of function name ? I suppose so, lacking frame pointers, but you still have filename + linenumber + 'wrong range'. -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html