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Commit 54dcf0ce authored by Rasmus Villemoes's avatar Rasmus Villemoes Committed by David S. Miller
Browse files

drivers/sbus/char: Micro-optimization in display7seg.c 



Flipping a bit doesn't need four lines of code; and gcc seems to
actually generate two branches.

Signed-off-by: default avatarRasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 57a4a3d7

drivers/sbus/char/display7seg.c

+1 −4
Original line number Diff line number Diff line
@@ -144,10 +144,7 @@ static long d7s_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 


	case D7SIOCTM:

		/* toggle device mode-- flip display orientation */

		if (regs & D7S_FLIP)

			regs &= ~D7S_FLIP;

		else

			regs |= D7S_FLIP;

		regs ^= D7S_FLIP;

		writeb(regs, p->regs);

		break;

	}