Jiri Slaby wrote:

On 11/12/2008 01:50 AM, Andrew Morton wrote:

quoted

quoted

quoted

let's fix it for good.
Signed-off-by: Denys Vlasenko <redacted>

--- linux-2.6.28-rc4/mm/mmap.c	Mon Nov 10 01:36:15 2008
+++ linux-2.6.28-rc4.fix/mm/mmap.c	Wed Nov 12 01:21:39 2008

@@ -1704,7 +1704,7 @@
 	vma = find_vma_prev(mm, addr, &prev);
 	if (vma && (vma->vm_start <= addr))
 		return vma;
-	if (expand_stack(prev, addr))
+	if (!prev || expand_stack(prev, addr))
 		return NULL;
 	if (prev->vm_flags & VM_LOCKED) {
 		if (mlock_vma_pages_range(prev, addr, prev->vm_end) < 0)

It looks like this was caused by me fixing rejects.  That was the fancy
include-lots-of-context-so-it-wont-apply patch.

Great, this one got fixed. Helge, did you proceed with bisecting which another
commit breaks parics while having this one applied?

I bisected twice. Both times I found this one to be the culprit.
Nevertheless, just reverting this (Thanks Denys!) didn't fixed the USB 
problem.
I'll retry another bisecting round with -rc4 now, but I have the dumb 
feeling the problem is not the USB part, but more in the usbhid driver.
Let's see.

Helge