locking/percpu-rwsem: Make percpu_free_rwsem() after kzalloc() safe

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This is the temporary ugly hack which will be reverted later. We only
need it to ensure that the next patch will not break "change sb_writers
to use percpu_rw_semaphore" patches routed via the VFS tree.

The alloc_super()->destroy_super() error path assumes that it is safe
to call percpu_free_rwsem() after kzalloc() without percpu_init_rwsem(),
so let's not disappoint it.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>

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Oleg Nesterov 2015-08-21 19:42:55 +02:00 • committed by Paul E. McKenney

parent 07899a6e5f

commit 95b19f684c

1 changed files with 7 additions and 0 deletions

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kernel/locking/percpu-rwsem.c

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