linux-toradex.git/include/asm-arm/thread_notify.h, branch v2.6.23.12 Linux kernel for Apalis and Colibri modules [ARM] Add thread_notify infrastructure 2006-06-22T09:24:18+00:00 Russell King rmk@dyn-67.arm.linux.org.uk 2006-06-21T12:31:52+00:00 d6551e884cf66de072b81f8b6d23259462c40baf Some machine classes need to allow VFP support to be built into the kernel, but still allow the kernel to run even though VFP isn't present. Unfortunately, the kernel hard-codes VFP instructions into the thread switch, which prevents this being run-time selectable. Solve this by introducing a notifier which things such as VFP can hook into to be informed of events which affect the VFP subsystem (eg, creation and destruction of threads, switches between threads.) Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Some machine classes need to allow VFP support to be built into the
kernel, but still allow the kernel to run even though VFP isn't
present.  Unfortunately, the kernel hard-codes VFP instructions
into the thread switch, which prevents this being run-time selectable.

Solve this by introducing a notifier which things such as VFP can
hook into to be informed of events which affect the VFP subsystem
(eg, creation and destruction of threads, switches between threads.)

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>