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Andries E. Brouwer authored
After # mount --rbind /tmp /mnt (on 2.5.68) I have a corrupted namespace. Umounting /mnt fails, and /proc/mounts contains ... /dev/root /mnt ext3 rw 0 0 proc /mnt/proc proc rw 0 0 usbfs /mnt/proc/bus/usb usbfs rw 0 0 /dev/hdb5 /mnt/usr reiserfs rw 0 0 ... where of course no directories /mnt/proc or /mnt/usr exist. This is caused by the fact that copy_tree() thinks that the dentry it is called with is the root of the filesystem. If it is not, confusion arose. This patch fixes this confusion.
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