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Brian Behlendorf
8294c69bb7
It's important to clear mp->owner after calling mutex_unlock() because when CONFIG_DEBUG_MUTEXES is defined the mutex owner is verified in mutex_unlock(). If we set it to NULL this check fails and the lockdep support is immediately disabled.
The Solaris Porting Layer (SPL) is a Linux kernel module which provides many of the Solaris kernel APIs. This shim layer makes it possible to run Solaris kernel code in the Linux kernel with relatively minimal modification. This can be particularly useful when you want to track upstream Solaris development closely and don’t want the overhead of maintaining a large patch which converts Solaris primitives to Linux primitives.
To build packages for your distribution:
$ ./configure
$ make pkg
Full documentation for building, configuring, and using the SPL can be found at: http://zfsonlinux.org