c3b0ab956d
commit 5d5e4522a7f404d1a96fd6c703989d32a9c9568d upstream.
printk from NMI context relies on irq work being raised on the local CPU
to print to console. This can be a problem if the NMI was raised by a
lockup detector to print lockup stack and regs, because the CPU may not
enable irqs (because it is locked up).
Introduce printk_trigger_flush() that can be called another CPU to try
to get those messages to the console, call that where printk_safe_flush
was previously called.
Fixes:
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|---|---|---|
| .. | ||
| Makefile | ||
| braille.c | ||
| braille.h | ||
| console_cmdline.h | ||
| index.c | ||
| internal.h | ||
| printk.c | ||
| printk_ringbuffer.c | ||
| printk_ringbuffer.h | ||
| printk_safe.c | ||