Messages in this thread Patch in this message | | | Date | Fri, 19 Mar 2010 23:38:30 -0700 | From | Yinghai Lu <> | Subject | [PATCH -v6] x86: do not free zero sized per cpu areas |
| |
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 if according to linus
Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@elte.hu> --- kernel/early_res.c | 6 ++++++ 1 file changed, 6 insertions(+)
Index: linux-2.6/kernel/early_res.c =================================================================== --- linux-2.6.orig/kernel/early_res.c +++ linux-2.6/kernel/early_res.c @@ -333,6 +333,12 @@ void __init free_early_partial(u64 start 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)
| |