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JFS: Use the kthread_ API

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Use the kthread_ API instead of opencoding lots of hairy code for kernel
thread creation and teardown.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
This commit is contained in:
Christoph Hellwig
2006-02-15 12:49:04 -06:00
committed by Dave Kleikamp
parent 4837c672fd
commit 91dbb4deb3
4 changed files with 38 additions and 72 deletions
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55
fs/jfs/super.c
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@@ -25,6 +25,7 @@
#include <linux/vfs.h>
#include <linux/mount.h>
#include <linux/moduleparam.h>
#include <linux/kthread.h>
#include <linux/posix_acl.h>
#include <asm/uaccess.h>
#include <linux/seq_file.h>
@@ -54,11 +55,9 @@ static int commit_threads = 0;
module_param(commit_threads, int, 0);
MODULE_PARM_DESC(commit_threads, "Number of commit threads");
int jfs_stop_threads;
static pid_t jfsIOthread;
static pid_t jfsCommitThread[MAX_COMMIT_THREADS];
static pid_t jfsSyncThread;
DECLARE_COMPLETION(jfsIOwait);
static struct task_struct *jfsCommitThread[MAX_COMMIT_THREADS];
struct task_struct *jfsIOthread;
struct task_struct *jfsSyncThread;
#ifdef CONFIG_JFS_DEBUG
int jfsloglevel = JFS_LOGLEVEL_WARN;
@@ -661,12 +660,12 @@ static int __init init_jfs_fs(void)
/*
* I/O completion thread (endio)
*/
jfsIOthread = kernel_thread(jfsIOWait, NULL, CLONE_KERNEL);
if (jfsIOthread < 0) {
jfs_err("init_jfs_fs: fork failed w/rc = %d", jfsIOthread);
jfsIOthread = kthread_run(jfsIOWait, NULL, "jfsIO");
if (IS_ERR(jfsIOthread)) {
rc = PTR_ERR(jfsIOthread);
jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
goto end_txmngr;
}
wait_for_completion(&jfsIOwait); /* Wait until thread starts */
if (commit_threads < 1)
commit_threads = num_online_cpus();
@@ -674,24 +673,21 @@ static int __init init_jfs_fs(void)
commit_threads = MAX_COMMIT_THREADS;
for (i = 0; i < commit_threads; i++) {
jfsCommitThread[i] = kernel_thread(jfs_lazycommit, NULL,
CLONE_KERNEL);
if (jfsCommitThread[i] < 0) {
jfs_err("init_jfs_fs: fork failed w/rc = %d",
jfsCommitThread[i]);
jfsCommitThread[i] = kthread_run(jfs_lazycommit, NULL, "jfsCommit");
if (IS_ERR(jfsCommitThread[i])) {
rc = PTR_ERR(jfsCommitThread[i]);
jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
commit_threads = i;
goto kill_committask;
}
/* Wait until thread starts */
wait_for_completion(&jfsIOwait);
}
jfsSyncThread = kernel_thread(jfs_sync, NULL, CLONE_KERNEL);
if (jfsSyncThread < 0) {
jfs_err("init_jfs_fs: fork failed w/rc = %d", jfsSyncThread);
jfsSyncThread = kthread_run(jfs_sync, NULL, "jfsSync");
if (IS_ERR(jfsSyncThread)) {
rc = PTR_ERR(jfsSyncThread);
jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
goto kill_committask;
}
wait_for_completion(&jfsIOwait); /* Wait until thread starts */
#ifdef PROC_FS_JFS
jfs_proc_init();
@@ -700,13 +696,9 @@ static int __init init_jfs_fs(void)
return register_filesystem(&jfs_fs_type);
kill_committask:
jfs_stop_threads = 1;
wake_up_all(&jfs_commit_thread_wait);
for (i = 0; i < commit_threads; i++)
wait_for_completion(&jfsIOwait);
wake_up(&jfs_IO_thread_wait);
wait_for_completion(&jfsIOwait); /* Wait for thread exit */
kthread_stop(jfsCommitThread[i]);
kthread_stop(jfsIOthread);
end_txmngr:
txExit();
free_metapage:
@@ -722,16 +714,13 @@ static void __exit exit_jfs_fs(void)
jfs_info("exit_jfs_fs called");
jfs_stop_threads = 1;
txExit();
metapage_exit();
wake_up(&jfs_IO_thread_wait);
wait_for_completion(&jfsIOwait); /* Wait until IO thread exits */
wake_up_all(&jfs_commit_thread_wait);
kthread_stop(jfsIOthread);
for (i = 0; i < commit_threads; i++)
wait_for_completion(&jfsIOwait);
wake_up(&jfs_sync_thread_wait);
wait_for_completion(&jfsIOwait); /* Wait until Sync thread exits */
kthread_stop(jfsCommitThread[i]);
kthread_stop(jfsSyncThread);
#ifdef PROC_FS_JFS
jfs_proc_clean();
#endif