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Introduce lminor(dev_t dev), which returns a linear minor number,

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ie: hides the fact that the major number is stuck in the middle.
This commit is contained in:
Poul-Henning Kamp 1999-08-15 09:32:47 +00:00
parent 2ce66fb320
commit 9a27d57978
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=49826
3 changed files with 16 additions and 3 deletions
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13
sys/kern/kern_conf.c
View File

@ -30,7 +30,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: kern_conf.c,v 1.55 1999/08/08 18:42:47 phk Exp $
* $Id: kern_conf.c,v 1.56 1999/08/13 10:29:20 phk Exp $
*/
#include <sys/param.h>
@ -194,6 +194,17 @@ minor(dev_t x)
return(x->si_udev & 0xffff00ff);
}
int
lminor(dev_t x)
{
int i;
if (x == NODEV)
return NOUDEV;
i = minor(x);
return ((i & 0xff) | (i >> 8));
}
dev_t
makebdev(int x, int y)
{

3
sys/sys/conf.h
View File

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)conf.h 8.5 (Berkeley) 1/9/95
* $Id: conf.h,v 1.72 1999/08/13 16:29:27 phk Exp $
* $Id: conf.h,v 1.73 1999/08/14 11:40:49 phk Exp $
*/
#ifndef _SYS_CONF_H_
@ -267,6 +267,7 @@ int iskmemdev __P((dev_t dev));
int iszerodev __P((dev_t dev));
dev_t makebdev __P((int maj, int min));
dev_t make_dev __P((struct cdevsw *devsw, int minor, uid_t uid, gid_t gid, int perms, char *fmt, ...)) __printflike(6, 7);
int lminor __P((dev_t dev));
void setconf __P((void));
/*

3
sys/sys/linedisc.h
View File

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)conf.h 8.5 (Berkeley) 1/9/95
* $Id: conf.h,v 1.72 1999/08/13 16:29:27 phk Exp $
* $Id: conf.h,v 1.73 1999/08/14 11:40:49 phk Exp $
*/
#ifndef _SYS_CONF_H_
@ -267,6 +267,7 @@ int iskmemdev __P((dev_t dev));
int iszerodev __P((dev_t dev));
dev_t makebdev __P((int maj, int min));
dev_t make_dev __P((struct cdevsw *devsw, int minor, uid_t uid, gid_t gid, int perms, char *fmt, ...)) __printflike(6, 7);
int lminor __P((dev_t dev));
void setconf __P((void));
/*