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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: Akinobu 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: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Akinobu Mita 2012-01-21 00:15:26 +09:00 committed by Jens Axboe
parent b2167ba6dd
commit 34ae2e47d9
1 changed files with 3 additions and 4 deletions
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7
drivers/block/xen-blkfront.c
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@ -43,6 +43,7 @@
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/mutex.h> #include <linux/mutex.h>
#include <linux/scatterlist.h> #include <linux/scatterlist.h>
#include <linux/bitmap.h>
#include <xen/xen.h> #include <xen/xen.h>
#include <xen/xenbus.h> #include <xen/xenbus.h>
@ -177,8 +178,7 @@ static int xlbd_reserve_minors(unsigned int minor, unsigned int nr)
spin_lock(&minor_lock); spin_lock(&minor_lock);
if (find_next_bit(minors, end, minor) >= end) { if (find_next_bit(minors, end, minor) >= end) {
for (; minor < end; ++minor) bitmap_set(minors, minor, nr);
__set_bit(minor, minors);
rc = 0; rc = 0;
} else } else
rc = -EBUSY; rc = -EBUSY;
@ -193,8 +193,7 @@ static void xlbd_release_minors(unsigned int minor, unsigned int nr)
BUG_ON(end > nr_minors); BUG_ON(end > nr_minors);
spin_lock(&minor_lock); spin_lock(&minor_lock);
for (; minor < end; ++minor) bitmap_clear(minors, minor, nr);
__clear_bit(minor, minors);
spin_unlock(&minor_lock); spin_unlock(&minor_lock);
} }