The patch titled
Use mutex instead of semaphore in the OnStream SCSI Tape driver
has been added to the -mm tree. Its filename is
use-mutex-instead-of-semaphore-in-the-onstream-scsi-tape-driver.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: Use mutex instead of semaphore in the OnStream SCSI Tape driver
From: Matthias Kaehlcke <matthias.kaehlcke@xxxxxxxxx>
The OnStream SCSI Tape driver uses a semaphore as mutex. Use the mutex API
instead of the (binary) semaphore.
Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@xxxxxxxxx>
Reviewed-by: Satyam Sharma <satyam@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/scsi/osst.c | 16 ++++++++--------
drivers/scsi/osst.h | 3 ++-
2 files changed, 10 insertions(+), 9 deletions(-)
diff -puN drivers/scsi/osst.c~use-mutex-instead-of-semaphore-in-the-onstream-scsi-tape-driver drivers/scsi/osst.c
--- a/drivers/scsi/osst.c~use-mutex-instead-of-semaphore-in-the-onstream-scsi-tape-driver
+++ a/drivers/scsi/osst.c
@@ -3298,7 +3298,7 @@ static ssize_t osst_write(struct file *
char * name = tape_name(STp);
- if (down_interruptible(&STp->lock))
+ if (mutex_lock_interruptible(&STp->lock))
return (-ERESTARTSYS);
/*
@@ -3600,7 +3600,7 @@ if (SRpnt) printk(KERN_ERR "%s:A: Not su
out:
if (SRpnt != NULL) osst_release_request(SRpnt);
- up(&STp->lock);
+ mutex_unlock(&STp->lock);
return retval;
}
@@ -3619,7 +3619,7 @@ static ssize_t osst_read(struct file * f
char * name = tape_name(STp);
- if (down_interruptible(&STp->lock))
+ if (mutex_lock_interruptible(&STp->lock))
return (-ERESTARTSYS);
/*
@@ -3785,7 +3785,7 @@ static ssize_t osst_read(struct file * f
out:
if (SRpnt != NULL) osst_release_request(SRpnt);
- up(&STp->lock);
+ mutex_unlock(&STp->lock);
return retval;
}
@@ -4852,7 +4852,7 @@ static int osst_ioctl(struct inode * ino
char * name = tape_name(STp);
void __user * p = (void __user *)arg;
- if (down_interruptible(&STp->lock))
+ if (mutex_lock_interruptible(&STp->lock))
return -ERESTARTSYS;
#if DEBUG
@@ -5163,14 +5163,14 @@ static int osst_ioctl(struct inode * ino
}
if (SRpnt) osst_release_request(SRpnt);
- up(&STp->lock);
+ mutex_unlock(&STp->lock);
return scsi_ioctl(STp->device, cmd_in, p);
out:
if (SRpnt) osst_release_request(SRpnt);
- up(&STp->lock);
+ mutex_unlock(&STp->lock);
return retval;
}
@@ -5866,7 +5866,7 @@ static int osst_probe(struct device *dev
tpnt->modes[2].defined = 1;
tpnt->density_changed = tpnt->compression_changed = tpnt->blksize_changed = 0;
- init_MUTEX(&tpnt->lock);
+ mutex_init(&tpnt->lock);
osst_nr_dev++;
write_unlock(&os_scsi_tapes_lock);
diff -puN drivers/scsi/osst.h~use-mutex-instead-of-semaphore-in-the-onstream-scsi-tape-driver drivers/scsi/osst.h
--- a/drivers/scsi/osst.h~use-mutex-instead-of-semaphore-in-the-onstream-scsi-tape-driver
+++ a/drivers/scsi/osst.h
@@ -4,6 +4,7 @@
#include <asm/byteorder.h>
#include <linux/completion.h>
+#include <linux/mutex.h>
/* FIXME - rename and use the following two types or delete them!
* and the types really should go to st.h anyway...
@@ -532,7 +533,7 @@ struct osst_tape {
struct scsi_driver *driver;
unsigned capacity;
struct scsi_device *device;
- struct semaphore lock; /* for serialization */
+ struct mutex lock; /* for serialization */
struct completion wait; /* for SCSI commands */
struct osst_buffer * buffer;
_
Patches currently in -mm which might be from matthias.kaehlcke@xxxxxxxxx are
kcopyd-use-mutex-instead-of-semaphore.patch
git-mtd.patch
videopix-frame-grabber-fix-unreleased-lock-in-vfc_debug.patch
fs-file_tablec-use-list_for_each_entry-instead-of-list_for_each.patch
fs-eventpollc-use-list_for_each_entry-instead-of-list_for_each.patch
fs-superc-use-list_for_each_entry-instead-of-list_for_each.patch
fs-superc-use-list_for_each_entry-instead-of-list_for_each-fix.patch
fs-locksc-use-list_for_each_entry-instead-of-list_for_each.patch
kernel-exitc-use-list_for_each_entry_safe-instead-of-list_for_each_safe.patch
kernel-time-clocksourcec-use-list_for_each_entry-instead-of-list_for_each.patch
mm-oom_killc-use-list_for_each_entry-instead-of-list_for_each.patch
kernel-userc-use-list_for_each_entry-instead-of-list_for_each.patch
use-mutex-instead-of-semaphore-in-the-host-ap-driver.patch
use-mutex-instead-of-semaphore-in-the-onstream-scsi-tape-driver.patch
use-mutex-instead-of-semaphore-in-the-scsi-tape-driver.patch
use-mutex-instead-of-semaphore-in-isdn-subsystem-common-functions.patch
use-mutex-instead-of-semaphore-in-the-dvb-frontend-tuning-interface.patch
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