Linux kernel hangs in early boot on 32-bit ARM platform, when ftrace 4-byte "mcount" function call location for "_raw_spin_unlock_irqrestore" function straddles icache lines. Discussion of the problem: https://forum.armbian.com/topic/41339-linux-image-legacy-sunxi2451-kernel-6192-is-broken-stuck-at-starting-kernel/?do=findComment&comment=196528 https://bugzilla.kernel.org/show_bug.cgi?id=219089 |
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