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02 December 2022, 17:28:11 UTC
Revision 0541881502a1276149889fe468662ff6a8fc8f6d authored by Yinghai Lu on 13 June 2013, 20:17:02 UTC, committed by H. Peter Anvin on 18 June 2013, 16:32:10 UTC 
range: Do not add new blank slot with add_range_with_merge
 
Joshua reported: Commit cd7b304dfaf1 (x86, range: fix missing merge
during add range) broke mtrr cleanup on his setup in 3.9.5.
corresponding commit in upstream is fbe06b7bae7c.

The reason is add_range_with_merge could generate blank spot.

We could avoid that by searching new expanded start/end, that
new range should include all connected ranges in range array.
At last add the new expanded start/end to the range array.
Also move up left array so do not add new blank slot in the
range array.

-v2: move left array to avoid enhance add_range()
-v3: include fix from Joshua about memmove declaring when
     DYN_DEBUG is used.

Reported-by: Joshua Covington <joshuacov@googlemail.com>
Tested-by: Joshua Covington <joshuacov@googlemail.com>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1371154622-8929-3-git-send-email-yinghai@kernel.org
Cc: <stable@vger.kernel.org> v3.9
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
1 parent d8d386c
History
Tip revision: 0541881502a1276149889fe468662ff6a8fc8f6d authored by Yinghai Lu on 13 June 2013, 20:17:02 UTC
range: Do not add new blank slot with add_range_with_merge
Tip revision: 0541881
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