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authorEric W. Biederman <ebiederm@xmission.com>2020-12-03 23:11:13 +0300
committerPeter Zijlstra <peterz@infradead.org>2020-12-09 19:08:42 +0300
commit31784cff7ee073b34d6eddabb95e3be2880a425c (patch)
treed1954eccd5b14129437e00b3d03e094a5dae7758 /init/init_task.c
parent0f9368b5bf6db0c04afc5454b1be79022a681615 (diff)
downloadlinux-31784cff7ee073b34d6eddabb95e3be2880a425c.tar.xz
rwsem: Implement down_read_interruptible
In preparation for converting exec_update_mutex to a rwsem so that multiple readers can execute in parallel and not deadlock, add down_read_interruptible. This is needed for perf_event_open to be converted (with no semantic changes) from working on a mutex to wroking on a rwsem. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/87k0tybqfy.fsf@x220.int.ebiederm.org
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