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Subject[PATCH][2.5][12/15] smp_call_function/_on_cpu - sparc64
 smp.c |   64 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--
1 files changed, 62 insertions(+), 2 deletions(-)

Index: linux-2.5.59-bk/arch/sparc64/kernel/smp.c
===================================================================
RCS file: /build/cvsroot/linux-2.5.59-bk/arch/sparc64/kernel/smp.c,v
retrieving revision 1.1.1.1
diff -u -r1.1.1.1 smp.c
--- linux-2.5.59-bk/arch/sparc64/kernel/smp.c 9 Feb 2003 09:08:36 -0000 1.1.1.1
+++ linux-2.5.59-bk/arch/sparc64/kernel/smp.c 9 Feb 2003 09:23:30 -0000
@@ -490,8 +490,7 @@
* You must not call this function with disabled interrupts or from a
* hardware interrupt handler or from a bottom half handler.
*/
-int smp_call_function(void (*func)(void *info), void *info,
- int nonatomic, int wait)
+int smp_call_function(void (*func)(void *info), void *info, int wait)
{
struct call_data_struct data;
int cpus = num_online_cpus() - 1;
@@ -531,6 +530,67 @@
spin_unlock(&call_lock);
printk("XCALL: Remote cpus not responding, ncpus=%d finished=%d\n",
num_online_cpus() - 1, atomic_read(&data.finished));
+ return 0;
+}
+
+/*
+ * smp_call_function_on_cpu - Runs func on all processors in the mask
+ *
+ * @func: The function to run. This must be fast and non-blocking.
+ * @info: An arbitrary pointer to pass to the function.
+ * @wait: If true, wait (atomically) until function has completed on other CPUs.
+ * @mask The bitmask of CPUs to call the function
+ *
+ * Returns 0 on success, else a negative status code. Does not return until
+ * remote CPUs are nearly ready to execute func or have executed it.
+ *
+ * You must not call this function with disabled interrupts or from a
+ * hardware interrupt handler or from a bottom half handler.
+ */
+
+int smp_call_function_on_cpu(void (*func)(void *info), void *info,
+ int wait, unsigned long mask)
+{
+ struct call_data_struct data;
+ int num_cpus = hweight32(mask), cpu;
+ long timeout;
+
+ cpu = get_cpu();
+ if (((1UL << cpu) & mask) || num_cpus == 0)
+ goto out;
+
+ data.func = func;
+ data.info = info;
+ atomic_set(&data.finished, 0);
+ data.wait = wait;
+
+ spin_lock(&call_lock);
+
+ call_data = &data;
+
+ smp_cross_call_masked(&xcall_call_function, 0, 0, 0, mask);
+
+ /*
+ * Wait for target cpus to complete function or at
+ * least snap the call data.
+ */
+ timeout = 1000000;
+ while (atomic_read(&data.finished) != num_cpus) {
+ if (--timeout <= 0)
+ goto out_timeout;
+ barrier();
+ udelay(1);
+ }
+
+ spin_unlock(&call_lock);
+ goto out;
+
+out_timeout:
+ spin_unlock(&call_lock);
+ printk("XCALL: Remote cpus not responding, ncpus=%d finished=%d\n",
+ num_cpus, atomic_read(&data.finished));
+out:
+ put_cpu_no_resched();
return 0;
}

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