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author | Peter Zijlstra <peterz@infradead.org> | 2017-03-01 15:23:30 (GMT) |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-10-21 15:21:33 (GMT) |
commit | 8b0be545deba980344915b67ee39dd6b5b0b2e76 (patch) | |
tree | df87fe3fb121cb9764180694a0fdec38b5cd201c /drivers/watchdog/kempld_wdt.c | |
parent | 43588be0735f78b4fbbcbae1e8234a5d4620c191 (diff) | |
download | linux-8b0be545deba980344915b67ee39dd6b5b0b2e76.tar.xz |
locking/lockdep: Add nest_lock integrity test
[ Upstream commit 7fb4a2cea6b18dab56d609530d077f168169ed6b ]
Boqun reported that hlock->references can overflow. Add a debug test
for that to generate a clear error when this happens.
Without this, lockdep is likely to report a mysterious failure on
unlock.
Reported-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Nicolai Hähnle <Nicolai.Haehnle@amd.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/watchdog/kempld_wdt.c')
0 files changed, 0 insertions, 0 deletions