Messages in this thread Patch in this message | | | From | Yinghai Lu <> | Subject | [PATCH 03/24] x86: Do not free zero sized per cpu areas | Date | Fri, 26 Mar 2010 15:21:33 -0700 |
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From: Ian Campbell <ian.campbell@citrix.com>
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@citrix.com> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Tested-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Tested-by: Joel Becker <joel.becker@oracle.com> Tested-by: Stanislaw Gruszka <sgruszka@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@elte.hu> --- 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
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