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Add major/minor/mkdev

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Maybe apply this change to master
This commit is contained in:
Frans Kaashoek 2019-08-15 10:35:59 -04:00
parent 7241838b4c
commit 510bcde894
1 changed files with 3 additions and 0 deletions
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3
kernel/file.h
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@ -9,6 +9,9 @@ struct file {
short major; // FD_DEVICE 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 // in-memory copy of an inode
struct inode { struct inode {