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(parent: 34816d2) | patch
rwsem: Implement down_read_killable_nested
authorEric W. Biederman <ebiederm@xmission.com>
Thu, 3 Dec 2020 20:10:32 +0000 (14:10 -0600)
committerPeter Zijlstra <peterz@infradead.org>
Wed, 9 Dec 2020 16:08:41 +0000 (17:08 +0100)
commit0f9368b5bf6db0c04afc5454b1be79022a681615
tree9744569b45cfca2a30e6e99a5198e4ec2bbeb587tree | snapshot
parent34816d20f173a90389c8a7e641166d8ea9dce70acommit | diff
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
include/linux/rwsem.h diff | blob | history
kernel/locking/rwsem.c diff | blob | history
Domain: System / Kernel;