commit 78ae87c3cd723c8a8dcd67d4e4cbc6d63671c108
author Andrew Morton <akpm@linux-foundation.org> Sun Jun 03 13:50:41 2007 -0700
committer Linus Torvalds <torvalds@woody.linux-foundation.org> Mon Jun 04 13:25:10 2007 -0700
tree ba550d1d94a11b8f758f905e40c3d2aa7494007d
parent 4c738480d21a190e3d99c7ce985ab9484f373a3c

vanishing ioctl handler debugging

We've had several reoprts of the CPU jumping to 0x00000000 is do_ioctl().  I
assume that there's a race and someone is zeroing out the ioctl handler while
this CPU waits for the lock_kernel().

The patch adds code to detect this, then emits stuff which will hopefuly lead
us to the culprit.

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>