7119bf7044
I didn't notice at the time but user_path_dir() was not introduced at the same time as set_fs_pwd() change. I had lumped the two together but in fact user_path_dir() was introduced in 2.6.27 and set_fs_pwd() taking 2 args was introduced in 2.6.25. This means builds against 2.6.25-2.6.26 kernels were broken. To fix this I've added a check for user_path_dir() and no longer assume that if set_fs_pwd() takes 2 args then user_path_dir() is also available.
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.
Documentation for building, configuring, and using the SPL can be found at: http://wiki.github.com/behlendorf/spl/