Commit c7b2eff0 authored by Serge E. Hallyn's avatar Serge E. Hallyn Committed by Linus Torvalds

[PATCH] kthread: update loop.c to use kthread

Update loop.c to use a kthread instead of a deprecated kernel_thread for
loop devices.

[akpm@osdl.org: don't change the thread's name]
Signed-off-by: default avatarSerge E. Hallyn <serue@us.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 2f72100c
......@@ -74,6 +74,7 @@
#include <linux/completion.h>
#include <linux/highmem.h>
#include <linux/gfp.h>
#include <linux/kthread.h>
#include <asm/uaccess.h>
......@@ -578,8 +579,6 @@ static int loop_thread(void *data)
struct loop_device *lo = data;
struct bio *bio;
daemonize("loop%d", lo->lo_number);
/*
* loop can be used in an encrypted device,
* hence, it mustn't be stopped at all
......@@ -592,11 +591,6 @@ static int loop_thread(void *data)
lo->lo_state = Lo_bound;
lo->lo_pending = 1;
/*
* complete it, we are running
*/
complete(&lo->lo_done);
for (;;) {
int pending;
......@@ -629,7 +623,6 @@ static int loop_thread(void *data)
break;
}
complete(&lo->lo_done);
return 0;
}
......@@ -746,6 +739,7 @@ static int loop_set_fd(struct loop_device *lo, struct file *lo_file,
unsigned lo_blocksize;
int lo_flags = 0;
int error;
struct task_struct *tsk;
loff_t size;
/* This is safe, since we have a reference from open(). */
......@@ -839,10 +833,11 @@ static int loop_set_fd(struct loop_device *lo, struct file *lo_file,
set_blocksize(bdev, lo_blocksize);
error = kernel_thread(loop_thread, lo, CLONE_KERNEL);
if (error < 0)
tsk = kthread_run(loop_thread, lo, "loop%d", lo->lo_number);
if (IS_ERR(tsk)) {
error = PTR_ERR(tsk);
goto out_putf;
wait_for_completion(&lo->lo_done);
}
return 0;
out_putf:
......@@ -898,6 +893,9 @@ static int loop_clr_fd(struct loop_device *lo, struct block_device *bdev)
if (lo->lo_state != Lo_bound)
return -ENXIO;
if (!lo->lo_thread)
return -EINVAL;
if (lo->lo_refcnt > 1) /* we needed one fd for the ioctl */
return -EBUSY;
......@@ -911,7 +909,7 @@ static int loop_clr_fd(struct loop_device *lo, struct block_device *bdev)
complete(&lo->lo_bh_done);
spin_unlock_irq(&lo->lo_lock);
wait_for_completion(&lo->lo_done);
kthread_stop(lo->lo_thread);
lo->lo_backing_file = NULL;
......@@ -924,6 +922,7 @@ static int loop_clr_fd(struct loop_device *lo, struct block_device *bdev)
lo->lo_sizelimit = 0;
lo->lo_encrypt_key_size = 0;
lo->lo_flags = 0;
lo->lo_thread = NULL;
memset(lo->lo_encrypt_key, 0, LO_KEY_SIZE);
memset(lo->lo_crypt_name, 0, LO_NAME_SIZE);
memset(lo->lo_file_name, 0, LO_NAME_SIZE);
......@@ -1288,7 +1287,6 @@ static int __init loop_init(void)
if (!lo->lo_queue)
goto out_mem4;
mutex_init(&lo->lo_ctl_mutex);
init_completion(&lo->lo_done);
init_completion(&lo->lo_bh_done);
lo->lo_number = i;
spin_lock_init(&lo->lo_lock);
......
......@@ -59,7 +59,7 @@ struct loop_device {
struct bio *lo_bio;
struct bio *lo_biotail;
int lo_state;
struct completion lo_done;
struct task_struct *lo_thread;
struct completion lo_bh_done;
struct mutex lo_ctl_mutex;
int lo_pending;
......
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