On Thu, 30 Aug 2018 at 22:09, Dan Rue dan.rue@linaro.org wrote:
The following commit in 4.18.y causes the build to fail: 79764192e1c4 ("printk/nmi: Prevent deadlock when accessing the main log buffer in NMI")
with: | kernel/printk/printk_safe.o: In function `vprintk_func': | printk_safe.c:(.text+0x51b): undefined reference to `vprintk_store' | printk_safe.c:(.text+0x52f): undefined reference to `defer_console_output'
Picking up these from mainline seems to do the trick: a338f84dc196 ("printk: Create helper function to queue deferred console handling") ba552399954d ("printk: Split the code for storing a message into the log buffer")
v4.14.68-rc1 (200ff75a6b9d9a6d44dd267c3b84c961983f35ac) fails with same error.
Best regards, Krzysztof