usage_count error in 2.2.15 floppy.c

From: Andries Brouwer (aeb@veritas.com)
Date: Sun May 07 2000 - 16:06:06 EST


While preparing a root floppy (for a diskless 1.5 MB 386)
my vanilla 2.2.15 kernel complained

        warning: usage count=0, CURRENT=c029f1ec exiting
        sect=2 cmd=1

(this was fsck.minix writing the superblock).

This was not easily reproducible.
Afterwards the fs mounted without complaint, that is,
the superblock had been written back correctly.

So, probably this is a bug in floppy.c.
The code there is rather messy, but at first sight I didnt see
anything that looked like it might cause this.

Andries

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