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authorEric W. Biederman <ebiederm@xmission.com>2020-12-03 14:10:32 -0600
committerPeter Zijlstra <peterz@infradead.org>2020-12-09 17:08:41 +0100
commit0f9368b5bf6db0c04afc5454b1be79022a681615 (patch)
tree9744569b45cfca2a30e6e99a5198e4ec2bbeb587 /mm
parent34816d20f173a90389c8a7e641166d8ea9dce70a (diff)
downloadlinux-0f9368b5bf6db0c04afc5454b1be79022a681615.tar.bz2
rwsem: Implement down_read_killable_nested
In preparation for converting exec_update_mutex to a rwsem so that multiple readers can execute in parallel and not deadlock, add down_read_killable_nested. This is needed so that kcmp_lock can be converted from working on a mutexes to working on rw_semaphores. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/87o8jabqh3.fsf@x220.int.ebiederm.org
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