arm64: traps: address fallout from printk -> pr_* conversion
Commit ac7b406c ("arm64: Use pr_* instead of printk") was a fairly mindless s/printk/pr_*/ change driven by a complaint from checkpatch. As is usual with such changes, this has led to some odd behaviour on arm64: * syslog now picks up the "pr_emerg" line from dump_backtrace, but not the actual trace, which leads to a bunch of "kernel:Call trace:" lines in the log * __{pte,pmd,pgd}_error print at KERN_CRIT, as opposed to KERN_ERR which is used by other architectures. This patch restores the original printk behaviour for dump_backtrace and downgrade the pgtable error macros to KERN_ERR. Signed-off-by: NWill Deacon <will.deacon@arm.com>
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