powerpc/pseries: Initialise nvram_pstore_info's buf_lock
authorLi Zhong <zhong@linux.vnet.ibm.com>
Mon, 17 Nov 2014 02:52:30 +0000 (10:52 +0800)
committerMichael Ellerman <mpe@ellerman.id.au>
Wed, 19 Nov 2014 05:09:13 +0000 (16:09 +1100)
commita49ab6eeebe5624d51466969a7bac611231eede8
tree5f907029857ad1aad276376699bbbdfd04f3f6cc
parent35891d40bfc4f41fc627abb757c0894c0028f3ab
powerpc/pseries: Initialise nvram_pstore_info's buf_lock

nvram_pstore_info's buf_lock is not initialized before registering,
which is clearly incorrect.

It causes some strange behavior when trying to obtain the lock during
kdump process.

On a UP configuration, the console stopped for a couple of seconds, then
"lockup suspected" warning printed out, but then it continued to run.

So try lock fails, and lockup reported, but then arch_spin_lock()
passes.

Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com>
[mpe: Edited changelog]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
arch/powerpc/platforms/pseries/nvram.c