serial: core: Document lock requirement for UPF_* flags updates

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The flags field of struct uart_port can only be safely modified
if the port mutex is held; no other lock prevents concurrent
changes from corrupting the field.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Peter Hurley 2014-09-02 17:39:19 -04:00 • committed by Greg Kroah-Hartman

parent 16020b989a

commit 8a949b07e4

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include/linux/serial_core.h

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