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| author |   John Ogness <john.ogness@linutronix.de> | 2021-07-15 21:39:55 +0206 |
|---|---|---|
| committer |   Petr Mladek <pmladek@suse.com> | 2021-07-26 15:07:15 +0200 |
| commit | 002eb6ad075142e5940122c7fcee71cf1e906e29 (patch) | |
| tree | d1cc9a2e98d07e23d26ad165841d3881556f8d25 /lib/nmi_backtrace.c | |
| parent | lib/nmi_backtrace: explicitly serialize banner and regs (diff) | |
| download | linux-dev-002eb6ad075142e5940122c7fcee71cf1e906e29.tar.xz linux-dev-002eb6ad075142e5940122c7fcee71cf1e906e29.zip | |
printk: track/limit recursion
Currently the printk safe buffers provide a form of recursion
protection by redirecting to the safe buffers whenever printk() is
recursively called.
In preparation for removal of the safe buffers, provide an alternate
explicit recursion protection. Recursion is limited to 3 levels
per-CPU and per-context.
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/20210715193359.25946-3-john.ogness@linutronix.de
Diffstat (limited to 'lib/nmi_backtrace.c')
0 files changed, 0 insertions, 0 deletions