Commit 3f992e1b authored by Clemens Ladisch's avatar Clemens Ladisch Committed by Linus Torvalds
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[PATCH] hpet: remove superfluous register reads 



This patch removes several reads of a timer's config register that serve no
purpose whatsoever.

Signed-off-by: default avatarClemens Ladisch <clemens@ladisch.de>
Acked-by: default avatarBob Picco <bob.picco@hp.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 642d30bb

drivers/char/hpet.c

+0 −4
Original line number Diff line number Diff line
@@ -367,7 +367,6 @@ static int hpet_ioctl_ieon(struct hpet_dev *devp) 
	if (!devp->hd_ireqfreq)

		return -EIO;



	v = readq(&timer->hpet_config);

	spin_lock_irq(&hpet_lock);



	if (devp->hd_flags & HPET_IE) {
@@ -378,7 +377,6 @@ static int hpet_ioctl_ieon(struct hpet_dev *devp) 
	devp->hd_flags |= HPET_IE;

	spin_unlock_irq(&hpet_lock);



	t = readq(&timer->hpet_config);

	irq = devp->hd_hdwirq;



	if (irq) {
@@ -855,11 +853,9 @@ int hpet_alloc(struct hpet_data *hdp) 
	}



	for (i = 0, devp = hpetp->hp_dev; i < hpetp->hp_ntimer; i++, devp++) {

		unsigned long v;

		struct hpet_timer __iomem *timer;



		timer = &hpet->hpet_timers[devp - hpetp->hp_dev];

		v = readq(&timer->hpet_config);



		devp->hd_hpets = hpetp;

		devp->hd_hpet = hpet;