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Commit 34ae2e47 authored by Akinobu Mita's avatar Akinobu Mita Committed by Jens Axboe
Browse files

xen-blkfront: use bitmap_set() and bitmap_clear() 



Use bitmap_set and bitmap_clear rather than modifying individual bits
in a memory region.

Signed-off-by: default avatarAkinobu Mita <akinobu.mita@gmail.com>
Cc: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: xen-devel@lists.xensource.com
Cc: virtualization@lists.linux-foundation.org
Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
parent b2167ba6

drivers/block/xen-blkfront.c

+3 −4
Original line number Diff line number Diff line
@@ -43,6 +43,7 @@ 
#include <linux/slab.h>

#include <linux/mutex.h>

#include <linux/scatterlist.h>

#include <linux/bitmap.h>



#include <xen/xen.h>

#include <xen/xenbus.h>
@@ -177,8 +178,7 @@ static int xlbd_reserve_minors(unsigned int minor, unsigned int nr) 


	spin_lock(&minor_lock);

	if (find_next_bit(minors, end, minor) >= end) {

		for (; minor < end; ++minor)

			__set_bit(minor, minors);

		bitmap_set(minors, minor, nr);

		rc = 0;

	} else

		rc = -EBUSY;
@@ -193,8 +193,7 @@ static void xlbd_release_minors(unsigned int minor, unsigned int nr) 


	BUG_ON(end > nr_minors);

	spin_lock(&minor_lock);

	for (; minor < end; ++minor)

		__clear_bit(minor, minors);

	bitmap_clear(minors,  minor, nr);

	spin_unlock(&minor_lock);

}