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authorKeith Owens <kaos@sgi.com>2005-09-11 17:19:06 +1000
committerTony Luck <tony.luck@intel.com>2005-09-11 14:01:30 -0700
commita2a979821b6ab75a4f143cfaa1c4672cc259ec10 (patch)
tree4e327a4a8c14829d4addf8a09e13355e0cf565a4 /kernel
parent9fe66dfd8846706ff11ed7990d06c92644973bd8 (diff)
[PATCH] MCA/INIT: scheduler hooks
Scheduler hooks to see/change which process is deemed to be on a cpu. Signed-off-by: Keith Owens <kaos@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/sched.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index dbd4490afec1..e9ff04a9b56d 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -3577,6 +3577,32 @@ task_t *idle_task(int cpu)
}
/**
+ * curr_task - return the current task for a given cpu.
+ * @cpu: the processor in question.
+ */
+task_t *curr_task(int cpu)
+{
+ return cpu_curr(cpu);
+}
+
+/**
+ * set_curr_task - set the current task for a given cpu.
+ * @cpu: the processor in question.
+ * @p: the task pointer to set.
+ *
+ * Description: This function must only be used when non-maskable interrupts
+ * are serviced on a separate stack. It allows the architecture to switch the
+ * notion of the current task on a cpu in a non-blocking manner. This function
+ * must be called with interrupts disabled, the caller must save the original
+ * value of the current task (see curr_task() above) and restore that value
+ * before reenabling interrupts.
+ */
+void set_curr_task(int cpu, task_t *p)
+{
+ cpu_curr(cpu) = p;
+}
+
+/**
* find_process_by_pid - find a process with a matching PID value.
* @pid: the pid in question.
*/

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