https://github.com/torvalds/linux
Revision f936bb42aeb94a069bec7c9e04100d199c372956 authored by Thomas Gleixner on 28 September 2021, 14:10:49 UTC, committed by Jakub Kicinski on 29 September 2021, 00:30:36 UTC
The sequence count bridge_mcast_querier::seq is protected by
net_bridge::multicast_lock but seqcount_init() does not associate the
seqcount with the lock. This leads to a warning on PREEMPT_RT because
preemption is still enabled.
Let seqcount_init() associate the seqcount with lock that protects the
write section. Remove lockdep_assert_held_once() because lockdep already checks
whether the associated lock is held.
Fixes: 67b746f94ff39 ("net: bridge: mcast: make sure querier port/address updates are consistent")
Reported-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Tested-by: Mike Galbraith <efault@gmx.de>
Acked-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Link: https://lore.kernel.org/r/20210928141049.593833-1-bigeasy@linutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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History 
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Tip revision: f936bb42aeb94a069bec7c9e04100d199c372956 authored by Thomas Gleixner on 28 September 2021, 14:10:49 UTC
net: bridge: mcast: Associate the seqcount with its protecting lock.
net: bridge: mcast: Associate the seqcount with its protecting lock.
Tip revision: f936bb4
| File | Mode | Size |
|---|---|---|
| Documentation | ||
| LICENSES | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | -rw-r--r-- | 16.6 KB |
| .cocciconfig | -rw-r--r-- | 59 bytes |
| .get_maintainer.ignore | -rw-r--r-- | 71 bytes |
| .gitattributes | -rw-r--r-- | 62 bytes |
| .gitignore | -rw-r--r-- | 1.9 KB |
| .mailmap | -rw-r--r-- | 19.8 KB |
| COPYING | -rw-r--r-- | 496 bytes |
| CREDITS | -rw-r--r-- | 98.6 KB |
| Kbuild | -rw-r--r-- | 1.3 KB |
| Kconfig | -rw-r--r-- | 555 bytes |
| MAINTAINERS | -rw-r--r-- | 605.7 KB |
| Makefile | -rw-r--r-- | 64.0 KB |
| README | -rw-r--r-- | 727 bytes |
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