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Date: Sun, 31 Oct 2010 14:24:37 +0100 (CET)
From: Thomas Gleixner <tglx@...utronix.de>
To: Linus Torvalds <torvalds@...ux-foundation.org>
cc: Andrew Morton <akpm@...ux-foundation.org>,
LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>
Subject: [GIT pull] semaphore final cleanups
Linus,
Please pull the latest core-locking-for-linus git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git core-locking-for-linus
The staging cleanup conflicts trivialy with the removal of
drivers/staging/dream/ in your tree.
Thanks,
tglx
------------------>
Thomas Gleixner (4):
hpfs: Convert sbi->hpfs_creation_de to mutex
jbd2: Convert jbd2_slab_create_sem to mutex
staging: Final semaphore cleanup
semaphore: Remove mutex emulation
drivers/staging/ath6kl/os/linux/ar6000_raw_if.c | 4 ++--
drivers/staging/brcm80211/brcmfmac/dhd_linux.c | 4 ++--
drivers/staging/brcm80211/sys/wl_mac80211.c | 2 +-
drivers/staging/comedi/drivers/dt9812.c | 2 +-
drivers/staging/comedi/drivers/usbdux.c | 4 ++--
drivers/staging/comedi/drivers/usbduxfast.c | 4 ++--
drivers/staging/dream/camera/mt9d112.c | 2 +-
drivers/staging/dream/camera/mt9p012_fox.c | 2 +-
drivers/staging/dream/camera/mt9t013.c | 2 +-
drivers/staging/dream/camera/s5k3e2fx.c | 2 +-
drivers/staging/msm/msm_fb.c | 4 ++--
drivers/staging/rtl8712/osdep_service.h | 2 +-
drivers/staging/smbfs/inode.c | 2 +-
.../westbridge/astoria/block/cyasblkdev_block.c | 2 +-
.../westbridge/astoria/block/cyasblkdev_queue.c | 2 +-
fs/hpfs/buffer.c | 4 ++--
fs/hpfs/hpfs_fn.h | 2 +-
fs/hpfs/super.c | 2 +-
fs/jbd2/journal.c | 8 ++++----
include/linux/semaphore.h | 6 ------
scripts/checkpatch.pl | 8 ++------
21 files changed, 30 insertions(+), 40 deletions(-)
diff --git a/drivers/staging/ath6kl/os/linux/ar6000_raw_if.c b/drivers/staging/ath6kl/os/linux/ar6000_raw_if.c
index c196098..6b8eeea 100644
--- a/drivers/staging/ath6kl/os/linux/ar6000_raw_if.c
+++ b/drivers/staging/ath6kl/os/linux/ar6000_raw_if.c
@@ -198,8 +198,8 @@ int ar6000_htc_raw_open(AR_SOFTC_T *ar)
for (streamID = HTC_RAW_STREAM_0; streamID < HTC_RAW_STREAM_NUM_MAX; streamID++) {
/* Initialize the data structures */
- init_MUTEX(&arRaw->raw_htc_read_sem[streamID]);
- init_MUTEX(&arRaw->raw_htc_write_sem[streamID]);
+ sema_init(&arRaw->raw_htc_read_sem[streamID], 1);
+ sema_init(&arRaw->raw_htc_write_sem[streamID], 1);
init_waitqueue_head(&arRaw->raw_htc_read_queue[streamID]);
init_waitqueue_head(&arRaw->raw_htc_write_queue[streamID]);
diff --git a/drivers/staging/brcm80211/brcmfmac/dhd_linux.c b/drivers/staging/brcm80211/brcmfmac/dhd_linux.c
index e535787..bbbe7c5 100644
--- a/drivers/staging/brcm80211/brcmfmac/dhd_linux.c
+++ b/drivers/staging/brcm80211/brcmfmac/dhd_linux.c
@@ -1929,7 +1929,7 @@ dhd_pub_t *dhd_attach(osl_t *osh, struct dhd_bus *bus, uint bus_hdrlen)
goto fail;
net->netdev_ops = NULL;
- init_MUTEX(&dhd->proto_sem);
+ sema_init(&dhd->proto_sem, 1);
/* Initialize other structure content */
init_waitqueue_head(&dhd->ioctl_resp_wait);
init_waitqueue_head(&dhd->ctrl_wait);
@@ -1977,7 +1977,7 @@ dhd_pub_t *dhd_attach(osl_t *osh, struct dhd_bus *bus, uint bus_hdrlen)
dhd->timer.function = dhd_watchdog;
/* Initialize thread based operation and lock */
- init_MUTEX(&dhd->sdsem);
+ sema_init(&dhd->sdsem, 1);
if ((dhd_watchdog_prio >= 0) && (dhd_dpc_prio >= 0))
dhd->threads_only = true;
else
diff --git a/drivers/staging/brcm80211/sys/wl_mac80211.c b/drivers/staging/brcm80211/sys/wl_mac80211.c
index ad635ee..d060377 100644
--- a/drivers/staging/brcm80211/sys/wl_mac80211.c
+++ b/drivers/staging/brcm80211/sys/wl_mac80211.c
@@ -866,7 +866,7 @@ static wl_info_t *wl_attach(u16 vendor, u16 device, unsigned long regs,
spin_lock_init(&wl->rpcq_lock);
spin_lock_init(&wl->txq_lock);
- init_MUTEX(&wl->sem);
+ sema_init(&wl->sem, 1);
#else
spin_lock_init(&wl->lock);
spin_lock_init(&wl->isr_lock);
diff --git a/drivers/staging/comedi/drivers/dt9812.c b/drivers/staging/comedi/drivers/dt9812.c
index 0560a74..0605985 100644
--- a/drivers/staging/comedi/drivers/dt9812.c
+++ b/drivers/staging/comedi/drivers/dt9812.c
@@ -262,7 +262,7 @@ struct dt9812_usb_cmd {
#define DT9812_NUM_SLOTS 16
-static DECLARE_MUTEX(dt9812_mutex);
+static DEFINE_SEMAPHORE(dt9812_mutex);
static const struct usb_device_id dt9812_table[] = {
{USB_DEVICE(0x0867, 0x9812)},
diff --git a/drivers/staging/comedi/drivers/usbdux.c b/drivers/staging/comedi/drivers/usbdux.c
index 6131e2d..1f177a6 100644
--- a/drivers/staging/comedi/drivers/usbdux.c
+++ b/drivers/staging/comedi/drivers/usbdux.c
@@ -315,7 +315,7 @@ struct usbduxsub {
*/
static struct usbduxsub usbduxsub[NUMUSBDUX];
-static DECLARE_MUTEX(start_stop_sem);
+static DEFINE_SEMAPHORE(start_stop_sem);
/*
* Stops the data acquision
@@ -2367,7 +2367,7 @@ static int usbduxsub_probe(struct usb_interface *uinterf,
dev_dbg(dev, "comedi_: usbdux: "
"usbduxsub[%d] is ready to connect to comedi.\n", index);
- init_MUTEX(&(usbduxsub[index].sem));
+ sema_init(&(usbduxsub[index].sem), 1);
/* save a pointer to the usb device */
usbduxsub[index].usbdev = udev;
diff --git a/drivers/staging/comedi/drivers/usbduxfast.c b/drivers/staging/comedi/drivers/usbduxfast.c
index 0a164a9..5b15e6d 100644
--- a/drivers/staging/comedi/drivers/usbduxfast.c
+++ b/drivers/staging/comedi/drivers/usbduxfast.c
@@ -199,7 +199,7 @@ struct usbduxfastsub_s {
*/
static struct usbduxfastsub_s usbduxfastsub[NUMUSBDUXFAST];
-static DECLARE_MUTEX(start_stop_sem);
+static DEFINE_SEMAPHORE(start_stop_sem);
/*
* bulk transfers to usbduxfast
@@ -1504,7 +1504,7 @@ static int usbduxfastsub_probe(struct usb_interface *uinterf,
"connect to comedi.\n", index);
#endif
- init_MUTEX(&(usbduxfastsub[index].sem));
+ sema_init(&(usbduxfastsub[index].sem), 1);
/* save a pointer to the usb device */
usbduxfastsub[index].usbdev = udev;
diff --git a/drivers/staging/dream/camera/mt9d112.c b/drivers/staging/dream/camera/mt9d112.c
index e6f2d51..27c978f 100644
--- a/drivers/staging/dream/camera/mt9d112.c
+++ b/drivers/staging/dream/camera/mt9d112.c
@@ -37,7 +37,7 @@ struct mt9d112_ctrl {
static struct mt9d112_ctrl *mt9d112_ctrl;
static DECLARE_WAIT_QUEUE_HEAD(mt9d112_wait_queue);
-DECLARE_MUTEX(mt9d112_sem);
+DEFINE_SEMAPHORE(mt9d112_sem);
/*=============================================================
diff --git a/drivers/staging/dream/camera/mt9p012_fox.c b/drivers/staging/dream/camera/mt9p012_fox.c
index 791bd6c..544a973 100644
--- a/drivers/staging/dream/camera/mt9p012_fox.c
+++ b/drivers/staging/dream/camera/mt9p012_fox.c
@@ -123,7 +123,7 @@ struct mt9p012_ctrl {
static struct mt9p012_ctrl *mt9p012_ctrl;
static DECLARE_WAIT_QUEUE_HEAD(mt9p012_wait_queue);
-DECLARE_MUTEX(mt9p012_sem);
+DEFINE_SEMAPHORE(mt9p012_sem);
/*=============================================================
EXTERNAL DECLARATIONS
diff --git a/drivers/staging/dream/camera/mt9t013.c b/drivers/staging/dream/camera/mt9t013.c
index 8fd7727..75e78aa 100644
--- a/drivers/staging/dream/camera/mt9t013.c
+++ b/drivers/staging/dream/camera/mt9t013.c
@@ -123,7 +123,7 @@ struct mt9t013_ctrl {
static struct mt9t013_ctrl *mt9t013_ctrl;
static DECLARE_WAIT_QUEUE_HEAD(mt9t013_wait_queue);
-DECLARE_MUTEX(mt9t013_sem);
+DEFINE_SEMAPHORE(mt9t013_sem);
extern struct mt9t013_reg mt9t013_regs; /* from mt9t013_reg.c */
diff --git a/drivers/staging/dream/camera/s5k3e2fx.c b/drivers/staging/dream/camera/s5k3e2fx.c
index 1459903..d66b453 100644
--- a/drivers/staging/dream/camera/s5k3e2fx.c
+++ b/drivers/staging/dream/camera/s5k3e2fx.c
@@ -313,7 +313,7 @@ struct s5k3e2fx_i2c_reg_conf {
static struct s5k3e2fx_ctrl *s5k3e2fx_ctrl;
static DECLARE_WAIT_QUEUE_HEAD(s5k3e2fx_wait_queue);
-DECLARE_MUTEX(s5k3e2fx_sem);
+DEFINE_SEMAPHORE(s5k3e2fx_sem);
static int s5k3e2fx_i2c_rxdata(unsigned short saddr, unsigned char *rxdata,
int length)
diff --git a/drivers/staging/msm/msm_fb.c b/drivers/staging/msm/msm_fb.c
index ea268ed..23fa049 100644
--- a/drivers/staging/msm/msm_fb.c
+++ b/drivers/staging/msm/msm_fb.c
@@ -1158,7 +1158,7 @@ static int msm_fb_release(struct fb_info *info, int user)
return ret;
}
-DECLARE_MUTEX(msm_fb_pan_sem);
+DEFINE_SEMAPHORE(msm_fb_pan_sem);
static int msm_fb_pan_display(struct fb_var_screeninfo *var,
struct fb_info *info)
@@ -1962,7 +1962,7 @@ static int msmfb_overlay_play(struct fb_info *info, unsigned long *argp)
#endif
-DECLARE_MUTEX(msm_fb_ioctl_ppp_sem);
+DEFINE_SEMAPHORE(msm_fb_ioctl_ppp_sem);
DEFINE_MUTEX(msm_fb_ioctl_lut_sem);
DEFINE_MUTEX(msm_fb_ioctl_hist_sem);
diff --git a/drivers/staging/rtl8712/osdep_service.h b/drivers/staging/rtl8712/osdep_service.h
index 7fca42c..d1674cd 100644
--- a/drivers/staging/rtl8712/osdep_service.h
+++ b/drivers/staging/rtl8712/osdep_service.h
@@ -161,7 +161,7 @@ static inline u32 _down_sema(struct semaphore *sema)
static inline void _rtl_rwlock_init(struct semaphore *prwlock)
{
- init_MUTEX(prwlock);
+ sema_init(prwlock, 1);
}
static inline void _init_listhead(struct list_head *list)
diff --git a/drivers/staging/smbfs/inode.c b/drivers/staging/smbfs/inode.c
index 552951a..fa42f40 100644
--- a/drivers/staging/smbfs/inode.c
+++ b/drivers/staging/smbfs/inode.c
@@ -537,7 +537,7 @@ static int smb_fill_super(struct super_block *sb, void *raw_data, int silent)
server->mnt = NULL;
server->sock_file = NULL;
init_waitqueue_head(&server->conn_wq);
- init_MUTEX(&server->sem);
+ sema_init(&server->sem, 1);
INIT_LIST_HEAD(&server->entry);
INIT_LIST_HEAD(&server->xmitq);
INIT_LIST_HEAD(&server->recvq);
diff --git a/drivers/staging/westbridge/astoria/block/cyasblkdev_block.c b/drivers/staging/westbridge/astoria/block/cyasblkdev_block.c
index f428a7a..e1851f0 100644
--- a/drivers/staging/westbridge/astoria/block/cyasblkdev_block.c
+++ b/drivers/staging/westbridge/astoria/block/cyasblkdev_block.c
@@ -157,7 +157,7 @@ struct cyasblkdev_blk_data {
/* pointer to west bridge block data device superstructure */
static struct cyasblkdev_blk_data *gl_bd;
-static DECLARE_MUTEX(open_lock);
+static DEFINE_SEMAPHORE(open_lock);
/* local forwardd declarationss */
static cy_as_device_handle *cyas_dev_handle;
diff --git a/drivers/staging/westbridge/astoria/block/cyasblkdev_queue.c b/drivers/staging/westbridge/astoria/block/cyasblkdev_queue.c
index 24e959e..0bbb8a3 100644
--- a/drivers/staging/westbridge/astoria/block/cyasblkdev_queue.c
+++ b/drivers/staging/westbridge/astoria/block/cyasblkdev_queue.c
@@ -334,7 +334,7 @@ int cyasblkdev_init_queue(struct cyasblkdev_queue *bq, spinlock_t *lock)
init_completion(&bq->thread_complete);
init_waitqueue_head(&bq->thread_wq);
- init_MUTEX(&bq->thread_sem);
+ sema_init(&bq->thread_sem, 1);
ret = kernel_thread(cyasblkdev_queue_thread, bq, CLONE_KERNEL);
if (ret >= 0) {
diff --git a/fs/hpfs/buffer.c b/fs/hpfs/buffer.c
index eac5f96..793cb9d 100644
--- a/fs/hpfs/buffer.c
+++ b/fs/hpfs/buffer.c
@@ -14,7 +14,7 @@ void hpfs_lock_creation(struct super_block *s)
#ifdef DEBUG_LOCKS
printk("lock creation\n");
#endif
- down(&hpfs_sb(s)->hpfs_creation_de);
+ mutex_lock(&hpfs_sb(s)->hpfs_creation_de);
}
void hpfs_unlock_creation(struct super_block *s)
@@ -22,7 +22,7 @@ void hpfs_unlock_creation(struct super_block *s)
#ifdef DEBUG_LOCKS
printk("unlock creation\n");
#endif
- up(&hpfs_sb(s)->hpfs_creation_de);
+ mutex_unlock(&hpfs_sb(s)->hpfs_creation_de);
}
/* Map a sector into a buffer and return pointers to it and to the buffer. */
diff --git a/fs/hpfs/hpfs_fn.h b/fs/hpfs/hpfs_fn.h
index b59eac0..2fee17d 100644
--- a/fs/hpfs/hpfs_fn.h
+++ b/fs/hpfs/hpfs_fn.h
@@ -87,7 +87,7 @@ struct hpfs_sb_info {
unsigned *sb_bmp_dir; /* main bitmap directory */
unsigned sb_c_bitmap; /* current bitmap */
unsigned sb_max_fwd_alloc; /* max forwad allocation */
- struct semaphore hpfs_creation_de; /* when creating dirents, nobody else
+ struct mutex hpfs_creation_de; /* when creating dirents, nobody else
can alloc blocks */
/*unsigned sb_mounting : 1;*/
int sb_timeshift;
diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index c969a1a..18e1d45 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -491,7 +491,7 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent)
sbi->sb_bmp_dir = NULL;
sbi->sb_cp_table = NULL;
- init_MUTEX(&sbi->hpfs_creation_de);
+ mutex_init(&sbi->hpfs_creation_de);
uid = current_uid();
gid = current_gid();
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 538417c..c590d15 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -1838,7 +1838,6 @@ size_t journal_tag_bytes(journal_t *journal)
*/
#define JBD2_MAX_SLABS 8
static struct kmem_cache *jbd2_slab[JBD2_MAX_SLABS];
-static DECLARE_MUTEX(jbd2_slab_create_sem);
static const char *jbd2_slab_names[JBD2_MAX_SLABS] = {
"jbd2_1k", "jbd2_2k", "jbd2_4k", "jbd2_8k",
@@ -1859,6 +1858,7 @@ static void jbd2_journal_destroy_slabs(void)
static int jbd2_journal_create_slab(size_t size)
{
+ static DEFINE_MUTEX(jbd2_slab_create_mutex);
int i = order_base_2(size) - 10;
size_t slab_size;
@@ -1870,16 +1870,16 @@ static int jbd2_journal_create_slab(size_t size)
if (unlikely(i < 0))
i = 0;
- down(&jbd2_slab_create_sem);
+ mutex_lock(&jbd2_slab_create_mutex);
if (jbd2_slab[i]) {
- up(&jbd2_slab_create_sem);
+ mutex_unlock(&jbd2_slab_create_mutex);
return 0; /* Already created */
}
slab_size = 1 << (i+10);
jbd2_slab[i] = kmem_cache_create(jbd2_slab_names[i], slab_size,
slab_size, 0, NULL);
- up(&jbd2_slab_create_sem);
+ mutex_unlock(&jbd2_slab_create_mutex);
if (!jbd2_slab[i]) {
printk(KERN_EMERG "JBD2: no memory for jbd2_slab cache\n");
return -ENOMEM;
diff --git a/include/linux/semaphore.h b/include/linux/semaphore.h
index 5310d27..39fa049 100644
--- a/include/linux/semaphore.h
+++ b/include/linux/semaphore.h
@@ -29,9 +29,6 @@ struct semaphore {
#define DEFINE_SEMAPHORE(name) \
struct semaphore name = __SEMAPHORE_INITIALIZER(name, 1)
-#define DECLARE_MUTEX(name) \
- struct semaphore name = __SEMAPHORE_INITIALIZER(name, 1)
-
static inline void sema_init(struct semaphore *sem, int val)
{
static struct lock_class_key __key;
@@ -39,9 +36,6 @@ static inline void sema_init(struct semaphore *sem, int val)
lockdep_init_map(&sem->lock.dep_map, "semaphore->lock", &__key, 0);
}
-#define init_MUTEX(sem) sema_init(sem, 1)
-#define init_MUTEX_LOCKED(sem) sema_init(sem, 0)
-
extern void down(struct semaphore *sem);
extern int __must_check down_interruptible(struct semaphore *sem);
extern int __must_check down_killable(struct semaphore *sem);
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 90b54d4..e3c7fc0 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2794,12 +2794,8 @@ sub process {
WARN("__func__ should be used instead of gcc specific __FUNCTION__\n" . $herecurr);
}
-# check for semaphores used as mutexes
- if ($line =~ /^.\s*(DECLARE_MUTEX|init_MUTEX)\s*\(/) {
- WARN("mutexes are preferred for single holder semaphores\n" . $herecurr);
- }
-# check for semaphores used as mutexes
- if ($line =~ /^.\s*init_MUTEX_LOCKED\s*\(/) {
+# check for semaphores initialized locked
+ if ($line =~ /^.\s*sema_init.+,\W?0\W?\)/) {
WARN("consider using a completion\n" . $herecurr);
}
--
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