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Brian Behlendorf
bff2361aeb
Commit torvalds/linux@46ad0840b has removed the architecture specific rwsem source and headers leaving only the generic version. As part of this change the RWSEM_ACTIVE_READ_BIAS and RWSEM_ACTIVE_WRITE_BIAS macros were moved to the private kernel/locking/rwsem.h header. This results in a build failure because these macros were required to implement the rw_tryupgrade() compatibility function. In practice, this isn't a major problem because there are only a few consumers of rw_tryupgrade() and because consumers of rw_tryupgrade should be written to retry using rw_enter(RW_WRITER). After auditing all of the callers only dmu_zfetch() was determined not to perform a retry. It has been updated in this commit to resolve this issue. That said, the rw_tryupgrade() functionality should be considered for possible removal in a future release due to the difficultly in supporting the interface. Reviewed-by: Tomohiro Kusumi <kusumi.tomohiro@gmail.com> Reviewed-by: Chunwei Chen <tuxoko@gmail.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #8730
The Solaris Porting Layer, SPL, is a Linux kernel module which provides a compatibility layer used by the ZFS on Linux project.
Installation
The latest version of the SPL is maintained as part of this repository. Only when building ZFS version 0.7.x or earlier must an external SPL release be used. These releases can be found at:
- Version 0.7.x: https://github.com/zfsonlinux/spl/tree/spl-0.7-release
- Version 0.6.5.x: https://github.com/zfsonlinux/spl/tree/spl-0.6.5-release
Release
The SPL is released under a GPLv2 license.
For more details see the NOTICE and THIRDPARTYLICENSE files; UCRL-CODE-235197