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| author |   John Ogness <john.ogness@linutronix.de> | 2021-03-03 11:15:21 +0100 |
|---|---|---|
| committer |   Petr Mladek <pmladek@suse.com> | 2021-03-08 11:43:15 +0100 |
| commit | 7d7a23a91c915f6a90b2a636b130c53e0fe5154c (patch) | |
| tree | f588998ccde75f23e1044f5fc636d134d9718c05 /scripts/gdb/linux/utils.py | |
| parent | printk: introduce CONSOLE_LOG_MAX (diff) | |
| download | wireguard-linux-7d7a23a91c915f6a90b2a636b130c53e0fe5154c.tar.xz wireguard-linux-7d7a23a91c915f6a90b2a636b130c53e0fe5154c.zip | |
printk: use seqcount_latch for clear_seq
kmsg_dump_rewind_nolock() locklessly reads @clear_seq. However,
this is not done atomically. Since @clear_seq is 64-bit, this
cannot be an atomic operation for all platforms. Therefore, use
a seqcount_latch to allow readers to always read a consistent
value.
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20210303101528.29901-9-john.ogness@linutronix.de
Diffstat (limited to 'scripts/gdb/linux/utils.py')
0 files changed, 0 insertions, 0 deletions