The following series gets the radix tree test suite compiling again in the current linux/master, adds a unit test which exposes a race in the radix tree multi-order iteration code, and then fixes that race.
This race was initially hit on a v4.15 based kernel and results in a GP fault. I've described the race in detail in patches 4 and 5. The fix is simple and necessary, and I think it should be merged for v4.17. This tree has gotten positive build confirmation from the 0-day bot, passes the updated radix tree test suite, xfstests, and the original test that was hitting the race with the v4.15 based kernel. Ross Zwisler (5): radix tree test suite: fix mapshift build target radix tree test suite: fix compilation issue radix tree test suite: add item_delete_rcu() radix tree test suite: multi-order iteration race radix tree: fix multi-order iteration race lib/radix-tree.c | 6 ++-- tools/include/linux/spinlock.h | 3 +- tools/testing/radix-tree/Makefile | 6 ++-- tools/testing/radix-tree/multiorder.c | 63 +++++++++++++++++++++++++++++++++++ tools/testing/radix-tree/test.c | 19 +++++++++++ tools/testing/radix-tree/test.h | 3 ++ 6 files changed, 91 insertions(+), 9 deletions(-) -- 2.14.3
