[IA64] Add hotplug cpu to salinfo.c, replace semaphore with mutex

Browse source

Add hotplug cpu support to salinfo.c.

The cpu_event field is a cpumask so use the cpu_* macros consistently,
replacing the existing mixture of cpu_* and *_bit macros.

Instead of counting the number of outstanding events in a semaphore and
trying to track that count over user space context, interrupt context,
non-maskable interrupt context and cpu hotplug, replace the semaphore
with a test for "any bits set" combined with a mutex.

Modify the locking to make the test for "work to do" an atomic
operation.

Signed-off-by: Keith Owens <kaos@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

...

This commit is contained in:

Keith Owens 2006-01-06 10:36:06 +11:00 • committed by Tony Luck

parent 15029285dc

commit e026cca0f2

1 changed files with 119 additions and 51 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

174

arch/ia64/kernel/salinfo.c

View file