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; + try_next: i = find_overlapped_early(start, end); if (i >= max_early_res) -- 1.6.4.2 -- 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
