mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-12 03:56:50 +07:00
f0d9a5f175
css_set_rwsem is the inner lock protecting css_sets and is accessed from hot paths such as fork and exit. Internally, it has no reason to be a rwsem or even mutex. There are no internal blocking operations while holding it. This was rwsem because css task iteration used to expose it to external iterator users. As the previous patch updated css task iteration such that the locking is not leaked to its users, there's no reason to keep it a rwsem. This patch converts css_set_rwsem to a spinlock and rename it to css_set_lock. It uses bh-safe operations as a planned usage needs to access it from RCU callback context. Signed-off-by: Tejun Heo <tj@kernel.org> |
||
|---|---|---|
| .. | ||
| acpi | ||
| asm-generic | ||
| clocksource | ||
| crypto | ||
| drm | ||
| dt-bindings | ||
| keys | ||
| kvm | ||
| linux | ||
| math-emu | ||
| media | ||
| memory | ||
| misc | ||
| net | ||
| pcmcia | ||
| ras | ||
| rdma | ||
| rxrpc | ||
| scsi | ||
| soc | ||
| sound | ||
| target | ||
| trace | ||
| uapi | ||
| video | ||
| xen | ||
| Kbuild | ||