Revert "drivers/tty: Explicitly pass current to show_stack"
This reverts commit 9f12cea9. Mark writes: Unfortunately, this patch will result in erroneous stack traces on some architectures. Sorry about this; I should have verified this more thoroughly before sending the series out. Please drop the patch at your earliest convenience. Cc: Mark Rutland <mark.rutland@arm.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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