From: Eric W. Biederman <[EMAIL PROTECTED]> - unquoted
This patch starts the xpc kernel threads using kthread_run
not a combination of kernel_thread and daemonize. Resuling
in slightly simpler and more maintainable code.
Cc: Jes Sorensen <[EMAIL PROTECTED]>
Cc: Tony Luck <[EMAIL PROTECTED]>
Signed-off-by: Eric W. Biederman <[EMAIL PROTECTED]>
---
arch/ia64/sn/kernel/xpc_main.c | 31 +++++++++++++------------------
1 files changed, 13 insertions(+), 18 deletions(-)
diff --git a/arch/ia64/sn/kernel/xpc_main.c b/arch/ia64/sn/kernel/xpc_main.c
index e336e16..5b53642 100644
--- a/arch/ia64/sn/kernel/xpc_main.c
+++ b/arch/ia64/sn/kernel/xpc_main.c
@@ -56,6 +56,7 @@
#include <linux/reboot.h>
#include <linux/completion.h>
#include <linux/kdebug.h>
+#include <linux/kthread.h>
#include <asm/sn/intr.h>
#include <asm/sn/sn_sal.h>
#include <asm/uaccess.h>
@@ -253,8 +254,6 @@ xpc_hb_checker(void *ignore)
/* this thread was marked active by xpc_hb_init() */
- daemonize(XPC_HB_CHECK_THREAD_NAME);
-
set_cpus_allowed(current, cpumask_of_cpu(XPC_HB_CHECK_CPU));
xpc_hb_check_timeout = jiffies + (xpc_hb_check_interval * HZ);
@@ -324,8 +323,6 @@ xpc_hb_checker(void *ignore)
static int
xpc_initiate_discovery(void *ignore)
{
- daemonize(XPC_DISCOVERY_THREAD_NAME);
-
xpc_discovery();
dev_dbg(xpc_part, "discovery thread is exiting\n");
@@ -494,8 +491,6 @@ xpc_activating(void *__partid)
dev_dbg(xpc_part, "bringing partition %d up\n", partid);
- daemonize("xpc%02d", partid);
-
/*
* This thread needs to run at a realtime priority to prevent a
* significant performance degradation.
@@ -559,7 +554,7 @@ xpc_activate_partition(struct xpc_partition *part)
{
partid_t partid = XPC_PARTID(part);
unsigned long irq_flags;
- pid_t pid;
+ struct task_struct *task;
spin_lock_irqsave(&part->act_lock, irq_flags);
@@ -571,9 +566,10 @@ xpc_activate_partition(struct xpc_partition *part)
spin_unlock_irqrestore(&part->act_lock, irq_flags);
- pid = kernel_thread(xpc_activating, (void *) ((u64) partid), 0);
+ task = kthread_run(xpc_activating, (void *) ((u64) partid),
+ "xpc%02d", partid);
- if (unlikely(pid <= 0)) {
+ if (unlikely(IS_ERR(task))) {
spin_lock_irqsave(&part->act_lock, irq_flags);
part->act_state = XPC_P_INACTIVE;
XPC_SET_REASON(part, xpcCloneKThreadFailed, __LINE__);
@@ -724,8 +720,6 @@ xpc_daemonize_kthread(void *args)
unsigned long irq_flags;
- daemonize("xpc%02dc%d", partid, ch_number);
-
dev_dbg(xpc_chan, "kthread starting, partid=%d, channel=%d\n",
partid, ch_number);
@@ -844,8 +838,9 @@ xpc_create_kthreads(struct xpc_channel *ch, int needed,
(void) xpc_part_ref(part);
xpc_msgqueue_ref(ch);
- pid = kernel_thread(xpc_daemonize_kthread, (void *) args, 0);
- if (pid < 0) {
+ task = kthread_run(xpc_daemonize_kthread, args,
+ "xpc%02dc%d", partid, ch_number);
+ if (IS_ERR(task)) {
/* the fork failed */
/*
@@ -1222,7 +1217,7 @@ xpc_init(void)
int ret;
partid_t partid;
struct xpc_partition *part;
- pid_t pid;
+ struct task_struct *task;
size_t buf_size;
@@ -1353,8 +1348,8 @@ xpc_init(void)
* The real work-horse behind xpc. This processes incoming
* interrupts and monitors remote heartbeats.
*/
- pid = kernel_thread(xpc_hb_checker, NULL, 0);
- if (pid < 0) {
+ task = kthread_run(xpc_hb_checker, NULL, XPC_HB_CHECK_THREAD_NAME);
+ if (IS_ERR(task)) {
dev_err(xpc_part, "failed while forking hb check thread\n");
/* indicate to others that our reserved page is uninitialized */
@@ -1384,8 +1379,8 @@ xpc_init(void)
* activate based on info provided by SAL. This new thread is short
* lived and will exit once discovery is complete.
*/
- pid = kernel_thread(xpc_initiate_discovery, NULL, 0);
- if (pid < 0) {
+ task = kthread_run(xpc_initiate_discovery, NULL,
XPC_DISCOVERY_THREAD_NAME);
+ if (IS_ERR(task)) {
dev_err(xpc_part, "failed while forking discovery thread\n");
/* mark this new thread as a non-starter */
--
1.5.0.g53756
-
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