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devices: pit: silence unused code warnings

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Some of the variants of the CommandCounter enum are not currently used;
add a directive to ignore dead code warnings for these variants, since
they are defined by the hardware/spec and may be used in the future.

BUG=None
TEST='cargo build' executes without warnings

Change-Id: I72b6cd24722de801ebfe63bb7419c4e972463082
Signed-off-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1454139
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Miriam Zimmerman <mutexlox@chromium.org>
Reviewed-by: Zach Reizner <zachr@chromium.org>
This commit is contained in:
Daniel Verkamp 2019-02-05 11:30:54 -08:00 committed by chrome-bot
parent b3fa5c95af
commit 48d1e214de
1 changed files with 1 additions and 0 deletions
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devices/src/pit.rs
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@ -41,6 +41,7 @@ enum CommandBit {
// six bits of the byte. However, if 0xc0 is specified, it indicates that the
// command is a "Read-Back", which can latch count and/or status of the
// counters selected in the lower bits. See Intel 8254 data sheet for details.
#[allow(dead_code)]
#[derive(Debug, Clone, Copy, PartialEq, enumn::N)]
enum CommandCounter {
CommandCounter0 = 0x00, // Select counter 0.