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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2022-10-24 12:33:30 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-10-24 12:33:30 -0700 |
| commit | f6602a97a11a3ddc077889fec2c026113c33c670 (patch) | |
| tree | 7c9eb57eac0ab29e150dbde0e6edde60a50f2d11 /Documentation | |
| parent | 2a91e897c0e199f5d4cdc1a15f948133b15ec1f3 (diff) | |
| parent | 31d8aaa87fcef1be5932f3813ea369e21bd3b11d (diff) | |
Merge tag 'rcu-urgent.2022.10.20a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu
Pull RCU fix from Paul McKenney:
"Fix a regression caused by commit bf95b2bc3e42 ("rcu: Switch polled
grace-period APIs to ->gp_seq_polled"), which could incorrectly leave
interrupts enabled after an early-boot call to synchronize_rcu().
Such synchronize_rcu() calls must acquire leaf rcu_node locks in order
to properly interact with polled grace periods, but the code did not
take into account the possibility of synchronize_rcu() being invoked
from the portion of the boot sequence during which interrupts are
disabled.
This commit therefore switches the lock acquisition and release from
irq to irqsave/irqrestore"
* tag 'rcu-urgent.2022.10.20a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu:
rcu: Keep synchronize_rcu() from enabling irqs in early boot
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions