Commit fb9edbe9 shortened held_lock->check from a 2-bit field
to a 1-bit field.

Make liblockdep compatible with the new definition by passing check=1
to lock_acquire() calls, rather than the old value check=2 (which
inadvertently disabled checks by overflowing to 0).

Without this fix, several of the test cases in liblockdep run_tests.sh
were failing.
Signed-off-by: NS. Lockwood-Childs <sjl@vctlabs.com>
Signed-off-by: NSasha Levin <sasha.levin@oracle.com>

Remove a debug print in init_preload() which was left over from
development and isn't usefull at all currently. It was also causing
false positive test results.
Reported-by: NS. Lockwood-Childs <sjl@vctlabs.com>
Signed-off-by: NSasha Levin <sasha.levin@oracle.com>

Comparison of a boolean value (!__init_state) with a value of 2 (done)
as currently happens in the code is unlikely to succeed and causes
repeated initialization of the pthread function pointers.

Instead, remove boolean comparison so that we would initialize said
function pointers only once.

Ref: https://bugzilla.kernel.org/show_bug.cgi?id=76741
Cc: Jean Delvare <jdelvare@suse.de>
Reported-by: NDavid Binderman <dcb314@hotmail.com>
Signed-off-by: NDianfang Zhang <zhangdianfang@huawei.com>
Signed-off-by: NSasha Levin <sasha.levin@oracle.com>

This makes initialization actually happen. Without it, initialization is
always skipped due to an incorrect conditional statement.
Signed-off-by: NIra W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: NSasha Levin <sasha.levin@oracle.com>

This allows lockdep to be used without being compiled in the
original program.

Usage is quite simple:

	LD_PRELOAD=/path/to/liblockdep.so /path/to/my/program

And magically, you'll have lockdep checking in your program!
Signed-off-by: NSasha Levin <sasha.levin@oracle.com>
Signed-off-by: NPeter Zijlstra <peterz@infradead.org>
Cc: torvalds@linux-foundation.org
Link: http://lkml.kernel.org/r/1371163284-6346-8-git-send-email-sasha.levin@oracle.comSigned-off-by: NIngo Molnar <mingo@kernel.org>