tree 92c5c8a647e31be6b3e09dcce42ec261d43ad2f5
parent 3363c9b0ed8f6b5a241d63018cad242ae458cdf9
author Mike Frysinger <vapier@gentoo.org> 1165370579 +1000
committer Linus Torvalds <torvalds@woody.osdl.org> 1165419686 -0800

[PATCH] uclinux: fix mmap() of directory for nommu case

I was playing with blackfin when i hit a neat bug ... doing an open() on a
directory and then passing that fd to mmap() would cause the kernel to hang

after poking into the code a bit more, i found that
mm/nommu.c:validate_mmap_request() checks the length and if it is 0, just
returns the address ... this is in stark contrast to mmu's
mm/mmap.c:do_mmap_pgoff() where it returns -EINVAL for 0 length requests ...
i then noticed that some other parts of the logic is out of date between the
two funcs, so perhaps that's the easy fix ?

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>