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Subject[PATCH][2.5][6/18] smp_call_function_on_cpu - ia64
Index: linux-2.5.59/include/asm-ia64/smp.h
===================================================================
RCS file: /build/cvsroot/linux-2.5.59/include/asm-ia64/smp.h,v
retrieving revision 1.1.1.1
diff -u -r1.1.1.1 smp.h
--- linux-2.5.59/include/asm-ia64/smp.h 17 Jan 2003 11:16:03 -0000 1.1.1.1
+++ linux-2.5.59/include/asm-ia64/smp.h 22 Jan 2003 02:40:14 -0000
@@ -133,8 +133,6 @@
extern void __init init_smp_config (void);
extern void smp_do_timer (struct pt_regs *regs);

-extern int smp_call_function_single (int cpuid, void (*func) (void *info), void *info,
- int retry, int wait);
extern void smp_send_reschedule (int cpu);
extern void smp_send_reschedule_all (void);

Index: linux-2.5.59/arch/ia64/kernel/palinfo.c
===================================================================
RCS file: /build/cvsroot/linux-2.5.59/arch/ia64/kernel/palinfo.c,v
retrieving revision 1.1.1.1
diff -u -r1.1.1.1 palinfo.c
--- linux-2.5.59/arch/ia64/kernel/palinfo.c 17 Jan 2003 11:15:16 -0000 1.1.1.1
+++ linux-2.5.59/arch/ia64/kernel/palinfo.c 22 Jan 2003 00:16:02 -0000
@@ -867,7 +867,7 @@


/* will send IPI to other CPU and wait for completion of remote call */
- if ((ret=smp_call_function_single(f->req_cpu, palinfo_smp_call, &ptr, 0, 1))) {
+ if ((ret=smp_call_function_single(f->req_cpu, palinfo_smp_call, &ptr, 1))) {
printk("palinfo: remote CPU call from %d to %d on function %d: error %d\n", smp_processor_id(), f->req_cpu, f->func_id, ret);
return 0;
}
Index: linux-2.5.59/arch/ia64/kernel/perfmon.c
===================================================================
RCS file: /build/cvsroot/linux-2.5.59/arch/ia64/kernel/perfmon.c,v
retrieving revision 1.1.1.1
diff -u -r1.1.1.1 perfmon.c
--- linux-2.5.59/arch/ia64/kernel/perfmon.c 17 Jan 2003 11:15:16 -0000 1.1.1.1
+++ linux-2.5.59/arch/ia64/kernel/perfmon.c 22 Jan 2003 00:13:55 -0000
@@ -3268,7 +3268,7 @@
}

/* will send IPI to other CPU and wait for completion of remote call */
- if ((ret=smp_call_function_single(cpu, pfm_handle_fetch_regs, &arg, 0, 1))) {
+ if ((ret=smp_call_function_single(cpu, pfm_handle_fetch_regs, &arg, 1))) {
printk("perfmon: remote CPU call from %d to %d error %d\n", smp_processor_id(), cpu, ret);
return;
}
Index: linux-2.5.59/arch/ia64/kernel/smp.c
===================================================================
RCS file: /build/cvsroot/linux-2.5.59/arch/ia64/kernel/smp.c,v
retrieving revision 1.1.1.1
diff -u -r1.1.1.1 smp.c
--- linux-2.5.59/arch/ia64/kernel/smp.c 17 Jan 2003 11:15:16 -0000 1.1.1.1
+++ linux-2.5.59/arch/ia64/kernel/smp.c 22 Jan 2003 00:32:15 -0000
@@ -17,6 +17,9 @@
* scheme.
* 10/13/00 Goutham Rao <goutham.rao@intel.com> Updated smp_call_function and
* smp_call_function_single to resend IPI on timeouts
+ * 21/01/03 Zwane Mwaikambo <zwane@holomorphy.com> Removed extraneous 'retry/nonatomic'
+ * parameter from smp_call_function* and introduced smp_call_function_on_cpu
+ * in accordance with other architectures.
*/
#define __KERNEL_SYSCALLS__

@@ -206,7 +209,7 @@
void
smp_flush_tlb_all (void)
{
- smp_call_function((void (*)(void *))local_flush_tlb_all, 0, 1, 1);
+ smp_call_function((void (*)(void *))local_flush_tlb_all, NULL, 1);
local_flush_tlb_all();
}

@@ -226,31 +229,35 @@
* anyhow, and once a CPU is interrupted, the cost of local_flush_tlb_all() is
* rather trivial.
*/
- smp_call_function((void (*)(void *))local_finish_flush_tlb_mm, mm, 1, 1);
+ smp_call_function((void (*)(void *))local_finish_flush_tlb_mm, mm, 1);
}

/*
- * Run a function on another CPU
- * <func> The function to run. This must be fast and non-blocking.
- * <info> An arbitrary pointer to pass to the function.
- * <nonatomic> Currently unused.
- * <wait> If true, wait until function has completed on other CPUs.
- * [RETURNS] 0 on success, else a negative status code.
+ * smp_call_function_on_cpu - Runs func on all processors in the mask
*
- * Does not return until the remote CPU is nearly ready to execute <func>
- * or is or has executed.
+ * @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_single (int cpuid, void (*func) (void *info), void *info, int nonatomic,
- int wait)
+smp_call_function_on_cpu (void (*func) (void *info), void *info, int wait,
+ unsigned long mask)
{
struct call_data_struct data;
- int cpus = 1;
+ int num_cpus = hweight64(mask), cpu, i;

- if (cpuid == smp_processor_id()) {
- printk("%s: trying to call self\n", __FUNCTION__);
- return -EBUSY;
+ cpu = get_cpu();
+ if (((1UL << cpu) & mask) || num_cpus == 0) {
+ put_cpu_no_resched();
+ return -EINVAL;
}

data.func = func;
@@ -264,21 +271,30 @@

call_data = &data;
mb(); /* ensure store to call_data precedes setting of IPI_CALL_FUNC */
- send_IPI_single(cpuid, IPI_CALL_FUNC);
+ for (i = 0; i < NR_CPUS; i++) {
+ if (cpu_online(i) && ((1UL << i) & mask))
+ send_IPI_single(i, IPI_CALL_FUNC);
+ }

/* Wait for response */
- while (atomic_read(&data.started) != cpus)
+ while (atomic_read(&data.started) != num_cpus)
barrier();

if (wait)
- while (atomic_read(&data.finished) != cpus)
+ while (atomic_read(&data.finished) != num_cpus)
barrier();
call_data = NULL;

spin_unlock_bh(&call_lock);
+ put_cpu_no_resched();
return 0;
}

+int smp_call_function_single (int cpuid, void (*func) (void *info), void *info, int wait)
+{
+ return smp_call_function_on_cpu(func, info, wait, 1UL << cpuid);
+}
+
/*
* this function sends a 'generic call function' IPI to all other CPUs
* in the system.
@@ -288,7 +304,6 @@
* [SUMMARY] Run a function on all other CPUs.
* <func> The function to run. This must be fast and non-blocking.
* <info> An arbitrary pointer to pass to the function.
- * <nonatomic> currently unused.
* <wait> If true, wait (atomically) until function has completed on other CPUs.
* [RETURNS] 0 on success, else a negative status code.
*
@@ -299,7 +314,7 @@
* hardware interrupt handler or from a bottom half handler.
*/
int
-smp_call_function (void (*func) (void *info), void *info, int nonatomic, int wait)
+smp_call_function (void (*func) (void *info), void *info, int wait)
{
struct call_data_struct data;
int cpus = num_online_cpus()-1;
Index: linux-2.5.59/arch/ia64/kernel/smpboot.c
===================================================================
RCS file: /build/cvsroot/linux-2.5.59/arch/ia64/kernel/smpboot.c,v
retrieving revision 1.1.1.1
diff -u -r1.1.1.1 smpboot.c
--- linux-2.5.59/arch/ia64/kernel/smpboot.c 17 Jan 2003 11:15:16 -0000 1.1.1.1
+++ linux-2.5.59/arch/ia64/kernel/smpboot.c 22 Jan 2003 00:33:18 -0000
@@ -203,7 +203,7 @@

go[MASTER] = 1;

- if (smp_call_function_single(master, sync_master, NULL, 1, 0) < 0) {
+ if (smp_call_function_single(master, sync_master, NULL, 0) < 0) {
printk("sync_itc: failed to get attention of CPU %u!\n", master);
return;
}
--
function.linuxpower.ca



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