Add major/minor/mkdev

Maybe apply this change to master
2019-08-15 10:35:59 -04:00 · 2019-08-15 10:35:59 -04:00 · 510bcde894
parent 7241838b4c
commit 510bcde894
1 changed files with 3 additions and 0 deletions
--- a/kernel/file.h
+++ b/kernel/file.h
@ -9,6 +9,9 @@ struct file {
  short major;       // FD_DEVICE
 };

+#define major(dev)  ((dev) >> 16 & 0xFFFF)
+#define minor(dev)  ((dev) & 0xFFFF)
+#define	mkdev(m,n)  ((uint)((m)<<16| (n)))

 // in-memory copy of an inode
 struct inode {