* [PATCH] s390 (7/10): tape driver fixes.
@ 2004-03-16 13:51 Martin Schwidefsky
0 siblings, 0 replies; 2+ messages in thread
From: Martin Schwidefsky @ 2004-03-16 13:51 UTC (permalink / raw)
To: akpm, linux-kernel
tape driver fixes:
- Link from ccw device to class device in sysfs.
- Cosmetic changes.
- Add copyright statements.
diffstat:
drivers/s390/char/Makefile | 4 -
drivers/s390/char/tape.h | 4 -
drivers/s390/char/tape_char.c | 47 ++++++-------------
drivers/s390/char/tape_class.c | 101 ++++++++++++++++++++++++++---------------
drivers/s390/char/tape_class.h | 41 +++++++++-------
5 files changed, 109 insertions(+), 88 deletions(-)
diff -urN linux-2.6/drivers/s390/char/Makefile linux-2.6-s390/drivers/s390/char/Makefile
--- linux-2.6/drivers/s390/char/Makefile Thu Mar 11 03:55:26 2004
+++ linux-2.6-s390/drivers/s390/char/Makefile Tue Mar 16 14:03:13 2004
@@ -18,6 +18,6 @@
tape-$(CONFIG_S390_TAPE_BLOCK) += tape_block.o
tape-$(CONFIG_PROC_FS) += tape_proc.o
-tape-objs := tape_core.o tape_std.o tape_char.o tape_class.o $(tape-y)
-obj-$(CONFIG_S390_TAPE) += tape.o
+tape-objs := tape_core.o tape_std.o tape_char.o $(tape-y)
+obj-$(CONFIG_S390_TAPE) += tape.o tape_class.o
obj-$(CONFIG_S390_TAPE_34XX) += tape_34xx.o
diff -urN linux-2.6/drivers/s390/char/tape.h linux-2.6-s390/drivers/s390/char/tape.h
--- linux-2.6/drivers/s390/char/tape.h Thu Mar 11 03:55:36 2004
+++ linux-2.6-s390/drivers/s390/char/tape.h Tue Mar 16 14:03:13 2004
@@ -199,8 +199,8 @@
struct list_head node;
struct ccw_device * cdev;
- struct cdev * nt;
- struct cdev * rt;
+ struct tape_class_device * nt;
+ struct tape_class_device * rt;
/* Device discipline information. */
struct tape_discipline * discipline;
diff -urN linux-2.6/drivers/s390/char/tape_char.c linux-2.6-s390/drivers/s390/char/tape_char.c
--- linux-2.6/drivers/s390/char/tape_char.c Thu Mar 11 03:55:37 2004
+++ linux-2.6-s390/drivers/s390/char/tape_char.c Tue Mar 16 14:03:13 2004
@@ -48,38 +48,29 @@
static int tapechar_major = TAPECHAR_MAJOR;
-struct cdev *
-tapechar_register_tape_dev(struct tape_device *device, char *name, int i)
-{
- struct cdev * cdev;
- char devname[11];
-
- sprintf(devname, "%s%i", name, i / 2);
- cdev = register_tape_dev(
- &device->cdev->dev,
- MKDEV(tapechar_major, i),
- &tape_fops,
- devname
- );
-
- return ((IS_ERR(cdev)) ? NULL : cdev);
-}
-
/*
* This function is called for every new tapedevice
*/
int
tapechar_setup_device(struct tape_device * device)
{
- device->nt = tapechar_register_tape_dev(
- device,
- "ntibm",
- device->first_minor
+ char device_name[20];
+
+ sprintf(device_name, "ntibm%i", device->first_minor / 2);
+ device->nt = register_tape_dev(
+ &device->cdev->dev,
+ MKDEV(tapechar_major, device->first_minor),
+ &tape_fops,
+ device_name,
+ "non-rewinding"
);
- device->rt = tapechar_register_tape_dev(
- device,
- "rtibm",
- device->first_minor + 1
+ device_name[0] = 'r';
+ device->rt = register_tape_dev(
+ &device->cdev->dev,
+ MKDEV(tapechar_major, device->first_minor + 1),
+ &tape_fops,
+ device_name,
+ "rewinding"
);
return 0;
@@ -500,9 +491,6 @@
tapechar_major = MAJOR(dev);
PRINT_INFO("tape gets major %d for character devices\n", MAJOR(dev));
-#ifdef TAPE390_INTERNAL_CLASS
- tape_setup_class();
-#endif
return 0;
}
@@ -512,9 +500,6 @@
void
tapechar_exit(void)
{
-#ifdef TAPE390_INTERNAL_CLASS
- tape_cleanup_class();
-#endif
PRINT_INFO("tape releases major %d for character devices\n",
tapechar_major);
unregister_chrdev_region(MKDEV(tapechar_major, 0), 256);
diff -urN linux-2.6/drivers/s390/char/tape_class.c linux-2.6-s390/drivers/s390/char/tape_class.c
--- linux-2.6/drivers/s390/char/tape_class.c Tue Mar 16 14:02:44 2004
+++ linux-2.6-s390/drivers/s390/char/tape_class.c Tue Mar 16 14:03:13 2004
@@ -1,4 +1,7 @@
/*
+ * (C) Copyright IBM Corp. 2004
+ * tape_class.c ($Revision: 1.6 $)
+ *
* Tape class device support
*
* Author: Stefan Bader <shbader@de.ibm.com>
@@ -6,11 +9,12 @@
*/
#include "tape_class.h"
-#ifndef TAPE390_INTERNAL_CLASS
MODULE_AUTHOR("Stefan Bader <shbader@de.ibm.com>");
-MODULE_DESCRIPTION("Tape class");
+MODULE_DESCRIPTION(
+ "(C) Copyright IBM Corp. 2004 All Rights Reserved.\n"
+ "tape_class.c ($Revision: 1.6 $)"
+);
MODULE_LICENSE("GPL");
-#endif
struct class_simple *tape_class;
@@ -29,69 +33,94 @@
* devname
* The pointer to the name of the character device.
*/
-struct cdev *register_tape_dev(
+struct tape_class_device *register_tape_dev(
struct device * device,
dev_t dev,
struct file_operations *fops,
- char * devname
-) {
- struct cdev * cdev;
+ char * device_name,
+ char * mode_name)
+{
+ struct tape_class_device * tcd;
int rc;
char * s;
- cdev = cdev_alloc();
- if (!cdev)
+ tcd = kmalloc(sizeof(struct tape_class_device), GFP_KERNEL);
+ if (!tcd)
return ERR_PTR(-ENOMEM);
- cdev->owner = fops->owner;
- cdev->ops = fops;
- cdev->dev = dev;
-
- rc = cdev_add(cdev, cdev->dev, 1);
- if (rc) {
- cdev_del(cdev);
- return ERR_PTR(rc);
+ memset(tcd, 0, sizeof(struct tape_class_device));
+ strncpy(tcd->device_name, device_name, TAPECLASS_NAME_LEN);
+ for (s = strchr(tcd->device_name, '/'); s; s = strchr(s, '/'))
+ *s = '!';
+ strncpy(tcd->mode_name, mode_name, TAPECLASS_NAME_LEN);
+ for (s = strchr(tcd->mode_name, '/'); s; s = strchr(s, '/'))
+ *s = '!';
+
+ tcd->char_device = cdev_alloc();
+ if (!tcd->char_device) {
+ rc = -ENOMEM;
+ goto fail_with_tcd;
}
- class_simple_device_add(tape_class, cdev->dev, device, "%s", devname);
- return cdev;
+ tcd->char_device->owner = fops->owner;
+ tcd->char_device->ops = fops;
+ tcd->char_device->dev = dev;
+
+ rc = cdev_add(tcd->char_device, tcd->char_device->dev, 1);
+ if (rc)
+ goto fail_with_cdev;
+
+ tcd->class_device = class_simple_device_add(
+ tape_class,
+ tcd->char_device->dev,
+ device,
+ "%s", tcd->device_name
+ );
+ sysfs_create_link(
+ &device->kobj,
+ &tcd->class_device->kobj,
+ tcd->mode_name
+ );
+
+ return tcd;
+
+fail_with_cdev:
+ cdev_del(&tcd->char_device);
+
+fail_with_tcd:
+ kfree(tcd);
+
+ return ERR_PTR(rc);
}
EXPORT_SYMBOL(register_tape_dev);
-void unregister_tape_dev(struct cdev *cdev)
+void unregister_tape_dev(struct tape_class_device *tcd)
{
- if (cdev != NULL) {
- class_simple_device_remove(cdev->dev);
- cdev_del(cdev);
+ if (tcd != NULL && !IS_ERR(tcd)) {
+ sysfs_remove_link(
+ &tcd->class_device->dev->kobj,
+ tcd->mode_name
+ );
+ class_simple_device_remove(tcd->char_device->dev);
+ cdev_del(tcd->char_device);
+ kfree(tcd);
}
}
EXPORT_SYMBOL(unregister_tape_dev);
-#ifndef TAPE390_INTERNAL_CLASS
static int __init tape_init(void)
-#else
-int tape_setup_class(void)
-#endif
{
tape_class = class_simple_create(THIS_MODULE, "tape390");
+
return 0;
}
-#ifndef TAPE390_INTERNAL_CLASS
static void __exit tape_exit(void)
-#else
-void tape_cleanup_class(void)
-#endif
{
class_simple_destroy(tape_class);
tape_class = NULL;
}
-#ifndef TAPE390_INTERNAL_CLASS
postcore_initcall(tape_init);
module_exit(tape_exit);
-#else
-EXPORT_SYMBOL(tape_setup_class);
-EXPORT_SYMBOL(tape_cleanup_class);
-#endif
diff -urN linux-2.6/drivers/s390/char/tape_class.h linux-2.6-s390/drivers/s390/char/tape_class.h
--- linux-2.6/drivers/s390/char/tape_class.h Thu Mar 11 03:55:24 2004
+++ linux-2.6-s390/drivers/s390/char/tape_class.h Tue Mar 16 14:03:13 2004
@@ -1,4 +1,7 @@
/*
+ * (C) Copyright IBM Corp. 2004 All Rights Reserved.
+ * tape_class.h ($Revision: 1.4 $)
+ *
* Tape class device support
*
* Author: Stefan Bader <shbader@de.ibm.com>
@@ -7,11 +10,8 @@
#ifndef __TAPE_CLASS_H__
#define __TAPE_CLASS_H__
-#if 0
#include <linux/init.h>
#include <linux/module.h>
-#endif
-
#include <linux/fs.h>
#include <linux/major.h>
#include <linux/kobject.h>
@@ -21,34 +21,41 @@
#include <linux/device.h>
#include <linux/kdev_t.h>
-#define TAPE390_INTERNAL_CLASS
+#define TAPECLASS_NAME_LEN 32
+
+struct tape_class_device {
+ struct cdev * char_device;
+ struct class_device * class_device;
+ char device_name[TAPECLASS_NAME_LEN];
+ char mode_name[TAPECLASS_NAME_LEN];
+};
/*
- * Register a tape device and return a pointer to the cdev structure.
+ * Register a tape device and return a pointer to the tape class device
+ * created by the call.
*
* device
* The pointer to the struct device of the physical (base) device.
- * drivername
- * The pointer to the drivers name for it's character devices.
* dev
* The intended major/minor number. The major number may be 0 to
* get a dynamic major number.
* fops
* The pointer to the drivers file operations for the tape device.
- * devname
- * The pointer to the name of the character device.
+ * device_name
+ * Pointer to the logical device name (will also be used as kobject name
+ * of the cdev). This can also be called the name of the tape class
+ * device.
+ * mode_name
+ * Points to the name of the tape mode. This creates a link with that
+ * name from the physical device to the logical device (class).
*/
-struct cdev *register_tape_dev(
+struct tape_class_device *register_tape_dev(
struct device * device,
dev_t dev,
struct file_operations *fops,
- char * devname
+ char * device_name,
+ char * node_name
);
-void unregister_tape_dev(struct cdev *cdev);
-
-#ifdef TAPE390_INTERNAL_CLASS
-int tape_setup_class(void);
-void tape_cleanup_class(void);
-#endif
+void unregister_tape_dev(struct tape_class_device *tcd);
#endif /* __TAPE_CLASS_H__ */
^ permalink raw reply [flat|nested] 2+ messages in thread* [PATCH] s390 (7/10): tape driver fixes.
@ 2004-03-12 19:37 Martin Schwidefsky
0 siblings, 0 replies; 2+ messages in thread
From: Martin Schwidefsky @ 2004-03-12 19:37 UTC (permalink / raw)
To: akpm, linux-kernel
tape driver fixes:
- Link from ccw device to class device in sysfs.
- Cosmetic changes.
- Add copyright statements.
diffstat:
drivers/s390/char/Makefile | 4 -
drivers/s390/char/tape.h | 4 -
drivers/s390/char/tape_char.c | 47 ++++++-------------
drivers/s390/char/tape_class.c | 101 +++++++++++++++++++++++++----------------
drivers/s390/char/tape_class.h | 41 +++++++++-------
5 files changed, 108 insertions(+), 89 deletions(-)
diff -urN linux-2.6/drivers/s390/char/Makefile linux-2.6-s390/drivers/s390/char/Makefile
--- linux-2.6/drivers/s390/char/Makefile Thu Mar 11 03:55:26 2004
+++ linux-2.6-s390/drivers/s390/char/Makefile Fri Mar 12 20:03:34 2004
@@ -18,6 +18,6 @@
tape-$(CONFIG_S390_TAPE_BLOCK) += tape_block.o
tape-$(CONFIG_PROC_FS) += tape_proc.o
-tape-objs := tape_core.o tape_std.o tape_char.o tape_class.o $(tape-y)
-obj-$(CONFIG_S390_TAPE) += tape.o
+tape-objs := tape_core.o tape_std.o tape_char.o $(tape-y)
+obj-$(CONFIG_S390_TAPE) += tape.o tape_class.o
obj-$(CONFIG_S390_TAPE_34XX) += tape_34xx.o
diff -urN linux-2.6/drivers/s390/char/tape.h linux-2.6-s390/drivers/s390/char/tape.h
--- linux-2.6/drivers/s390/char/tape.h Thu Mar 11 03:55:36 2004
+++ linux-2.6-s390/drivers/s390/char/tape.h Fri Mar 12 20:03:34 2004
@@ -199,8 +199,8 @@
struct list_head node;
struct ccw_device * cdev;
- struct cdev * nt;
- struct cdev * rt;
+ struct tape_class_device * nt;
+ struct tape_class_device * rt;
/* Device discipline information. */
struct tape_discipline * discipline;
diff -urN linux-2.6/drivers/s390/char/tape_char.c linux-2.6-s390/drivers/s390/char/tape_char.c
--- linux-2.6/drivers/s390/char/tape_char.c Thu Mar 11 03:55:37 2004
+++ linux-2.6-s390/drivers/s390/char/tape_char.c Fri Mar 12 20:03:34 2004
@@ -48,38 +48,29 @@
static int tapechar_major = TAPECHAR_MAJOR;
-struct cdev *
-tapechar_register_tape_dev(struct tape_device *device, char *name, int i)
-{
- struct cdev * cdev;
- char devname[11];
-
- sprintf(devname, "%s%i", name, i / 2);
- cdev = register_tape_dev(
- &device->cdev->dev,
- MKDEV(tapechar_major, i),
- &tape_fops,
- devname
- );
-
- return ((IS_ERR(cdev)) ? NULL : cdev);
-}
-
/*
* This function is called for every new tapedevice
*/
int
tapechar_setup_device(struct tape_device * device)
{
- device->nt = tapechar_register_tape_dev(
- device,
- "ntibm",
- device->first_minor
+ char device_name[20];
+
+ sprintf(device_name, "ntibm%i", device->first_minor / 2);
+ device->nt = register_tape_dev(
+ &device->cdev->dev,
+ MKDEV(tapechar_major, device->first_minor),
+ &tape_fops,
+ device_name,
+ "non-rewinding"
);
- device->rt = tapechar_register_tape_dev(
- device,
- "rtibm",
- device->first_minor + 1
+ device_name[0] = 'r';
+ device->rt = register_tape_dev(
+ &device->cdev->dev,
+ MKDEV(tapechar_major, device->first_minor + 1),
+ &tape_fops,
+ device_name,
+ "rewinding"
);
return 0;
@@ -500,9 +491,6 @@
tapechar_major = MAJOR(dev);
PRINT_INFO("tape gets major %d for character devices\n", MAJOR(dev));
-#ifdef TAPE390_INTERNAL_CLASS
- tape_setup_class();
-#endif
return 0;
}
@@ -512,9 +500,6 @@
void
tapechar_exit(void)
{
-#ifdef TAPE390_INTERNAL_CLASS
- tape_cleanup_class();
-#endif
PRINT_INFO("tape releases major %d for character devices\n",
tapechar_major);
unregister_chrdev_region(MKDEV(tapechar_major, 0), 256);
diff -urN linux-2.6/drivers/s390/char/tape_class.c linux-2.6-s390/drivers/s390/char/tape_class.c
--- linux-2.6/drivers/s390/char/tape_class.c Thu Mar 11 03:55:44 2004
+++ linux-2.6-s390/drivers/s390/char/tape_class.c Fri Mar 12 20:03:34 2004
@@ -1,4 +1,7 @@
/*
+ * (C) Copyright IBM Corp. 2004
+ * tape_class.c ($Revision: 1.6 $)
+ *
* Tape class device support
*
* Author: Stefan Bader <shbader@de.ibm.com>
@@ -6,11 +9,12 @@
*/
#include "tape_class.h"
-#ifndef TAPE390_INTERNAL_CLASS
MODULE_AUTHOR("Stefan Bader <shbader@de.ibm.com>");
-MODULE_DESCRIPTION("Tape class");
+MODULE_DESCRIPTION(
+ "(C) Copyright IBM Corp. 2004 All Rights Reserved.\n"
+ "tape_class.c ($Revision: 1.6 $)"
+);
MODULE_LICENSE("GPL");
-#endif
struct class_simple *tape_class;
@@ -29,72 +33,95 @@
* devname
* The pointer to the name of the character device.
*/
-struct cdev *register_tape_dev(
+struct tape_class_device *register_tape_dev(
struct device * device,
dev_t dev,
struct file_operations *fops,
- char * devname
-) {
- struct cdev * cdev;
+ char * device_name,
+ char * mode_name)
+{
+ struct tape_class_device * tcd;
int rc;
char * s;
- cdev = cdev_alloc();
- if (!cdev)
+ tcd = kmalloc(sizeof(struct tape_class_device), GFP_KERNEL);
+ if (!tcd)
return ERR_PTR(-ENOMEM);
- cdev->owner = fops->owner;
- cdev->ops = fops;
- cdev->dev = dev;
- strcpy(cdev->kobj.name, devname);
- for (s = strchr(cdev->kobj.name, '/'); s; s = strchr(s, '/'))
+ memset(tcd, 0, sizeof(struct tape_class_device));
+ strncpy(tcd->device_name, device_name, TAPECLASS_NAME_LEN);
+ for (s = strchr(tcd->device_name, '/'); s; s = strchr(s, '/'))
+ *s = '!';
+ strncpy(tcd->mode_name, mode_name, TAPECLASS_NAME_LEN);
+ for (s = strchr(tcd->mode_name, '/'); s; s = strchr(s, '/'))
*s = '!';
- rc = cdev_add(cdev, cdev->dev, 1);
- if (rc) {
- kobject_put(&cdev->kobj);
- return ERR_PTR(rc);
+ tcd->char_device = cdev_alloc();
+ if (!tcd->char_device) {
+ rc = -ENOMEM;
+ goto fail_with_tcd;
}
- class_simple_device_add(tape_class, cdev->dev, device, "%s", devname);
- return cdev;
+ tcd->char_device->owner = fops->owner;
+ tcd->char_device->ops = fops;
+ tcd->char_device->dev = dev;
+ strcpy(tcd->char_device->kobj.name, tcd->device_name);
+
+ rc = cdev_add(tcd->char_device, tcd->char_device->dev, 1);
+ if (rc)
+ goto fail_with_cdev;
+
+ tcd->class_device = class_simple_device_add(
+ tape_class,
+ tcd->char_device->dev,
+ device,
+ "%s", tcd->device_name
+ );
+ sysfs_create_link(
+ &device->kobj,
+ &tcd->class_device->kobj,
+ tcd->mode_name
+ );
+
+ return tcd;
+
+fail_with_cdev:
+ kobject_put(&tcd->char_device->kobj);
+
+fail_with_tcd:
+ kfree(tcd);
+
+ return ERR_PTR(rc);
}
EXPORT_SYMBOL(register_tape_dev);
-void unregister_tape_dev(struct cdev *cdev)
+void unregister_tape_dev(struct tape_class_device *tcd)
{
- if (cdev != NULL) {
- class_simple_device_remove(cdev->dev);
- cdev_del(cdev);
+ if (tcd != NULL && !IS_ERR(tcd)) {
+ sysfs_remove_link(
+ &tcd->class_device->dev->kobj,
+ tcd->mode_name
+ );
+ class_simple_device_remove(tcd->char_device->dev);
+ cdev_del(tcd->char_device);
+ kfree(tcd);
}
}
EXPORT_SYMBOL(unregister_tape_dev);
-#ifndef TAPE390_INTERNAL_CLASS
static int __init tape_init(void)
-#else
-int tape_setup_class(void)
-#endif
{
tape_class = class_simple_create(THIS_MODULE, "tape390");
+
return 0;
}
-#ifndef TAPE390_INTERNAL_CLASS
static void __exit tape_exit(void)
-#else
-void tape_cleanup_class(void)
-#endif
{
class_simple_destroy(tape_class);
tape_class = NULL;
}
-#ifndef TAPE390_INTERNAL_CLASS
postcore_initcall(tape_init);
module_exit(tape_exit);
-#else
-EXPORT_SYMBOL(tape_setup_class);
-EXPORT_SYMBOL(tape_cleanup_class);
-#endif
diff -urN linux-2.6/drivers/s390/char/tape_class.h linux-2.6-s390/drivers/s390/char/tape_class.h
--- linux-2.6/drivers/s390/char/tape_class.h Thu Mar 11 03:55:24 2004
+++ linux-2.6-s390/drivers/s390/char/tape_class.h Fri Mar 12 20:03:34 2004
@@ -1,4 +1,7 @@
/*
+ * (C) Copyright IBM Corp. 2004 All Rights Reserved.
+ * tape_class.h ($Revision: 1.4 $)
+ *
* Tape class device support
*
* Author: Stefan Bader <shbader@de.ibm.com>
@@ -7,11 +10,8 @@
#ifndef __TAPE_CLASS_H__
#define __TAPE_CLASS_H__
-#if 0
#include <linux/init.h>
#include <linux/module.h>
-#endif
-
#include <linux/fs.h>
#include <linux/major.h>
#include <linux/kobject.h>
@@ -21,34 +21,41 @@
#include <linux/device.h>
#include <linux/kdev_t.h>
-#define TAPE390_INTERNAL_CLASS
+#define TAPECLASS_NAME_LEN 32
+
+struct tape_class_device {
+ struct cdev * char_device;
+ struct class_device * class_device;
+ char device_name[TAPECLASS_NAME_LEN];
+ char mode_name[TAPECLASS_NAME_LEN];
+};
/*
- * Register a tape device and return a pointer to the cdev structure.
+ * Register a tape device and return a pointer to the tape class device
+ * created by the call.
*
* device
* The pointer to the struct device of the physical (base) device.
- * drivername
- * The pointer to the drivers name for it's character devices.
* dev
* The intended major/minor number. The major number may be 0 to
* get a dynamic major number.
* fops
* The pointer to the drivers file operations for the tape device.
- * devname
- * The pointer to the name of the character device.
+ * device_name
+ * Pointer to the logical device name (will also be used as kobject name
+ * of the cdev). This can also be called the name of the tape class
+ * device.
+ * mode_name
+ * Points to the name of the tape mode. This creates a link with that
+ * name from the physical device to the logical device (class).
*/
-struct cdev *register_tape_dev(
+struct tape_class_device *register_tape_dev(
struct device * device,
dev_t dev,
struct file_operations *fops,
- char * devname
+ char * device_name,
+ char * node_name
);
-void unregister_tape_dev(struct cdev *cdev);
-
-#ifdef TAPE390_INTERNAL_CLASS
-int tape_setup_class(void);
-void tape_cleanup_class(void);
-#endif
+void unregister_tape_dev(struct tape_class_device *tcd);
#endif /* __TAPE_CLASS_H__ */
^ permalink raw reply [flat|nested] 2+ messages in thread
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2004-03-16 13:51 [PATCH] s390 (7/10): tape driver fixes Martin Schwidefsky
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2004-03-12 19:37 Martin Schwidefsky
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