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of local_lock_t - this primitive comes from the -rt project and identifies CPU-local locking dependencies normally handled opaquely beind preempt_disable() or local_irq_save/disable() critical sections. The generated code on mainline kernels doesn't change as a result, but still there are benefits: improved debugging and better documentation of data structure accesses. The new local_lock_t primitives are introduced and then utilized in a couple of kernel subsystems. No change in functionality is intended. There's also other smaller changes and cleanups. Signed-off-by: Ingo Molnar <mingo@kernel.org> -----BEGIN PGP SIGNATURE----- iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAl7VAogRHG1pbmdvQGtl cm5lbC5vcmcACgkQEnMQ0APhK1h67BAAusYb44jJyZUE74rmaLnJr0c6j7eJ6twT 8LKRwxb21Y35DMuX6M5ewmvnHiLFYmjL728z+y8O+SP8vb4PSJBX/75X+wsawIJB cjHdxonyynVVC4zcbdrc37FsrOiVoKLbbZcpqRzHksKkCq2PHbFVxBNvEaKHZCWW 1jnq0MRy9wEJtW9EThDWPLD+OPWhBvocUFYJH4fiqCIaDiip/E16fz3i+yMPt545 Jz4Ibnsq+G5Ehm1N2AkaZuK9V9nYv85E7Z/UNiK4mkDOApE6OMS+q3d86BhqgPg5 g/HL3HNXAtIY74tBYAac5tAQglT+283LuTpEPt9BEjNM7QxKg/ecXO7lwtn7Boku dACMqeuMHbLyru8uhbun/VBx1gca7HIhW1cvXO5OoR7o78fHpEFivjJ0B0OuSYAI y+/DsA41OlkWSEnboUs+zTQgFatqxQPke92xpGOJtjVVZRYHRqxcPtw9WFmoVqWA HeczDQLcSUhqbKSfr6X9BO2u3qxys5BzmImTKMqXEQ4d8Kk0QXbJgGYGfS8+ASey Am/jwUP3Cvzs99NxLH5gECKRSuTx3rY7nRGaIBYa+Ui575bdSF8sVAF13riB2mBp NJq2Pw0D36WcX7ecaC2Fk2ezkphbeuAr8E7gh/Mt/oVxjrfwRGfPMrnIwKygUydw 1W5x+WZ+WsY= =TBTY -----END PGP SIGNATURE----- Merge tag 'locking-core-2020-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull locking updates from Ingo Molnar: "The biggest change to core locking facilities in this cycle is the introduction of local_lock_t - this primitive comes from the -rt project and identifies CPU-local locking dependencies normally handled opaquely beind preempt_disable() or local_irq_save/disable() critical sections. The generated code on mainline kernels doesn't change as a result, but still there are benefits: improved debugging and better documentation of data structure accesses. The new local_lock_t primitives are introduced and then utilized in a couple of kernel subsystems. No change in functionality is intended. There's also other smaller changes and cleanups" * tag 'locking-core-2020-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: zram: Use local lock to protect per-CPU data zram: Allocate struct zcomp_strm as per-CPU memory connector/cn_proc: Protect send_msg() with a local lock squashfs: Make use of local lock in multi_cpu decompressor mm/swap: Use local_lock for protection radix-tree: Use local_lock for protection locking: Introduce local_lock() locking/lockdep: Replace zero-length array with flexible-array locking/rtmutex: Remove unused rt_mutex_cmpxchg_relaxed()