mmap(), close(), and dget()

Jason McMullan (jmcc@grits.visus.com)
2 Feb 1998 21:49:02 GMT

Hi there everybody! Ok, here's my problem
(character device driver)

1) App open()s my device inode
*) dev->open() called.

2) App mmap()s some memory through the device
*) dev->mmap() called
*) I do the MMAP dance..
*) I set vma->vm_dentry=dget(file->dentry);

3) App exits
*) dev->close() called
*) vma is unregistered

Isn't that the wrong order for #3? Shouldn't the
vma's for mallocs be cleaned BEFORE dev->close() is
called?

--
Jason McMullan - Linux - GGI - http://beans.visus.com/~jmcc
NT 5.0 is the last nail in the Unix coffin. Interestingly, Unix
isn't in the coffin... It's wondering what the heck is sealing 
itself into a wooden box 6 feet underground...