timer: Remove init_timer_on_stack() in favor of timer_setup_on_stack()

Remove uses of init_timer_on_stack() with open-coded function and data
assignments that could be expressed using timer_setup_on_stack(). Several
were removed from the stack entirely since there was a one-to-one mapping
of parent structure to timer, those are switched to using timer_setup()
instead. All related callbacks were adjusted to use from_timer().

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mips@linux-mips.org
Cc: Petr Mladek <pmladek@suse.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Sebastian Reichel <sre@kernel.org>
Cc: Kalle Valo <kvalo@qca.qualcomm.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Wim Van Sebroeck <wim@iguana.be>
Cc: linux1394-devel@lists.sourceforge.net
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: linux-s390@vger.kernel.org
Cc: linux-wireless@vger.kernel.org
Cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com>
Cc: linux-scsi@vger.kernel.org
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Ursula Braun <ubraun@linux.vnet.ibm.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Harish Patil <harish.patil@cavium.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Michael Reed <mdr@sgi.com>
Cc: Manish Chopra <manish.chopra@cavium.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: linux-pm@vger.kernel.org
Cc: Lai Jiangshan <jiangshanlai@gmail.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Mark Gross <mark.gross@intel.com>
Cc: linux-watchdog@vger.kernel.org
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Stefan Richter <stefanr@s5r6.in-berlin.de>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: netdev@vger.kernel.org
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Link: https://lkml.kernel.org/r/1507159627-127660-4-git-send-email-keescook@chromium.org
This commit is contained in:
Kees Cook 2017-10-04 16:26:57 -07:00 committed by Thomas Gleixner
parent 1d1fe902af
commit 9c6c273aa4
11 changed files with 36 additions and 57 deletions

View File

@ -478,9 +478,9 @@ struct dpm_watchdog {
* There's not much we can do here to recover so panic() to
* capture a crash-dump in pstore.
*/
static void dpm_watchdog_handler(unsigned long data)
static void dpm_watchdog_handler(struct timer_list *t)
{
struct dpm_watchdog *wd = (void *)data;
struct dpm_watchdog *wd = from_timer(wd, t, timer);
dev_emerg(wd->dev, "**** DPM device timeout ****\n");
show_stack(wd->tsk, NULL);
@ -500,11 +500,9 @@ static void dpm_watchdog_set(struct dpm_watchdog *wd, struct device *dev)
wd->dev = dev;
wd->tsk = current;
init_timer_on_stack(timer);
timer_setup_on_stack(timer, dpm_watchdog_handler, 0);
/* use same timeout value for both suspend and resume */
timer->expires = jiffies + HZ * CONFIG_DPM_WATCHDOG_TIMEOUT;
timer->function = dpm_watchdog_handler;
timer->data = (unsigned long)wd;
add_timer(timer);
}

View File

@ -137,9 +137,9 @@ int fw_cancel_transaction(struct fw_card *card,
}
EXPORT_SYMBOL(fw_cancel_transaction);
static void split_transaction_timeout_callback(unsigned long data)
static void split_transaction_timeout_callback(struct timer_list *timer)
{
struct fw_transaction *t = (struct fw_transaction *)data;
struct fw_transaction *t = from_timer(t, timer, split_timeout_timer);
struct fw_card *card = t->card;
unsigned long flags;
@ -373,8 +373,8 @@ void fw_send_request(struct fw_card *card, struct fw_transaction *t, int tcode,
t->tlabel = tlabel;
t->card = card;
t->is_split_transaction = false;
setup_timer(&t->split_timeout_timer,
split_transaction_timeout_callback, (unsigned long)t);
timer_setup(&t->split_timeout_timer,
split_transaction_timeout_callback, 0);
t->callback = callback;
t->callback_data = callback_data;
@ -423,7 +423,7 @@ int fw_run_transaction(struct fw_card *card, int tcode, int destination_id,
struct transaction_callback_data d;
struct fw_transaction t;
init_timer_on_stack(&t.split_timeout_timer);
timer_setup_on_stack(&t.split_timeout_timer, NULL, 0);
init_completion(&d.done);
d.payload = payload;
fw_send_request(card, &t, tcode, destination_id, generation, speed,

View File

@ -44,10 +44,11 @@ static void parport_ieee1284_wakeup (struct parport *port)
up (&port->physport->ieee1284.irq);
}
static struct parport *port_from_cookie[PARPORT_MAX];
static void timeout_waiting_on_port (unsigned long cookie)
static void timeout_waiting_on_port (struct timer_list *t)
{
parport_ieee1284_wakeup (port_from_cookie[cookie % PARPORT_MAX]);
struct parport *port = from_timer(port, t, timer);
parport_ieee1284_wakeup (port);
}
/**
@ -69,27 +70,19 @@ static void timeout_waiting_on_port (unsigned long cookie)
int parport_wait_event (struct parport *port, signed long timeout)
{
int ret;
struct timer_list timer;
if (!port->physport->cad->timeout)
/* Zero timeout is special, and we can't down() the
semaphore. */
return 1;
init_timer_on_stack(&timer);
timer.expires = jiffies + timeout;
timer.function = timeout_waiting_on_port;
port_from_cookie[port->number % PARPORT_MAX] = port;
timer.data = port->number;
add_timer (&timer);
timer_setup(&port->timer, timeout_waiting_on_port, 0);
mod_timer(&port->timer, jiffies + timeout);
ret = down_interruptible (&port->physport->ieee1284.irq);
if (!del_timer_sync(&timer) && !ret)
if (!del_timer_sync(&port->timer) && !ret)
/* Timed out. */
ret = 1;
destroy_timer_on_stack(&timer);
return ret;
}

View File

@ -128,6 +128,7 @@ struct tape_request {
int options; /* options for execution. */
int retries; /* retry counter for error recovery. */
int rescnt; /* residual count from devstat. */
struct timer_list timer; /* timer for std_assign_timeout(). */
/* Callback for delivering final status. */
void (*callback)(struct tape_request *, void *);

View File

@ -32,14 +32,12 @@
* tape_std_assign
*/
static void
tape_std_assign_timeout(unsigned long data)
tape_std_assign_timeout(struct timer_list *t)
{
struct tape_request * request;
struct tape_device * device;
struct tape_request * request = from_timer(request, t, timer);
struct tape_device * device = request->device;
int rc;
request = (struct tape_request *) data;
device = request->device;
BUG_ON(!device);
DBF_EVENT(3, "%08x: Assignment timeout. Device busy.\n",
@ -70,16 +68,12 @@ tape_std_assign(struct tape_device *device)
* to another host (actually this shouldn't happen but it does).
* So we set up a timeout for this call.
*/
init_timer_on_stack(&timeout);
timeout.function = tape_std_assign_timeout;
timeout.data = (unsigned long) request;
timeout.expires = jiffies + 2 * HZ;
add_timer(&timeout);
timer_setup(&request->timer, tape_std_assign_timeout, 0);
mod_timer(&timeout, jiffies + 2 * HZ);
rc = tape_do_io_interruptible(device, request);
del_timer_sync(&timeout);
destroy_timer_on_stack(&timeout);
del_timer_sync(&request->timer);
if (rc != 0) {
DBF_EVENT(3, "%08x: assign failed - device might be busy\n",

View File

@ -834,9 +834,10 @@ lcs_notify_lancmd_waiters(struct lcs_card *card, struct lcs_cmd *cmd)
* Emit buffer of a lan command.
*/
static void
lcs_lancmd_timeout(unsigned long data)
lcs_lancmd_timeout(struct timer_list *t)
{
struct lcs_reply *reply, *list_reply, *r;
struct lcs_reply *reply = from_timer(reply, t, timer);
struct lcs_reply *list_reply, *r;
unsigned long flags;
LCS_DBF_TEXT(4, trace, "timeout");
@ -864,7 +865,6 @@ lcs_send_lancmd(struct lcs_card *card, struct lcs_buffer *buffer,
{
struct lcs_reply *reply;
struct lcs_cmd *cmd;
struct timer_list timer;
unsigned long flags;
int rc;
@ -885,14 +885,10 @@ lcs_send_lancmd(struct lcs_card *card, struct lcs_buffer *buffer,
rc = lcs_ready_buffer(&card->write, buffer);
if (rc)
return rc;
init_timer_on_stack(&timer);
timer.function = lcs_lancmd_timeout;
timer.data = (unsigned long) reply;
timer.expires = jiffies + HZ*card->lancmd_timeout;
add_timer(&timer);
timer_setup(&reply->timer, lcs_lancmd_timeout, 0);
mod_timer(&reply->timer, jiffies + HZ * card->lancmd_timeout);
wait_event(reply->wait_q, reply->received);
del_timer_sync(&timer);
destroy_timer_on_stack(&timer);
del_timer_sync(&reply->timer);
LCS_DBF_TEXT_(4, trace, "rc:%d",reply->rc);
rc = reply->rc;
lcs_put_reply(reply);

View File

@ -275,6 +275,7 @@ struct lcs_reply {
void (*callback)(struct lcs_card *, struct lcs_cmd *);
wait_queue_head_t wait_q;
struct lcs_card *card;
struct timer_list timer;
int received;
int rc;
};

View File

@ -758,9 +758,9 @@ enum action {
};
static void qla1280_mailbox_timeout(unsigned long __data)
static void qla1280_mailbox_timeout(struct timer_list *t)
{
struct scsi_qla_host *ha = (struct scsi_qla_host *)__data;
struct scsi_qla_host *ha = from_timer(ha, t, mailbox_timer);
struct device_reg __iomem *reg;
reg = ha->iobase;
@ -2465,7 +2465,6 @@ qla1280_mailbox_command(struct scsi_qla_host *ha, uint8_t mr, uint16_t *mb)
uint16_t __iomem *mptr;
uint16_t data;
DECLARE_COMPLETION_ONSTACK(wait);
struct timer_list timer;
ENTER("qla1280_mailbox_command");
@ -2494,18 +2493,15 @@ qla1280_mailbox_command(struct scsi_qla_host *ha, uint8_t mr, uint16_t *mb)
/* Issue set host interrupt command. */
/* set up a timer just in case we're really jammed */
init_timer_on_stack(&timer);
timer.expires = jiffies + 20*HZ;
timer.data = (unsigned long)ha;
timer.function = qla1280_mailbox_timeout;
add_timer(&timer);
timer_setup(&ha->mailbox_timer, qla1280_mailbox_timeout, 0);
mod_timer(&ha->mailbox_timer, jiffies + 20 * HZ);
spin_unlock_irq(ha->host->host_lock);
WRT_REG_WORD(&reg->host_cmd, HC_SET_HOST_INT);
data = qla1280_debounce_register(&reg->istatus);
wait_for_completion(&wait);
del_timer_sync(&timer);
del_timer_sync(&ha->mailbox_timer);
spin_lock_irq(ha->host->host_lock);

View File

@ -1055,6 +1055,7 @@ struct scsi_qla_host {
struct list_head done_q; /* Done queue */
struct completion *mailbox_wait;
struct timer_list mailbox_timer;
volatile struct {
uint32_t online:1; /* 0 */

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@ -225,6 +225,7 @@ struct parport {
struct pardevice *waittail;
struct list_head list;
struct timer_list timer;
unsigned int flags;
void *sysctl_table;

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@ -132,8 +132,6 @@ static inline void init_timer_on_stack_key(struct timer_list *timer,
__init_timer((timer), TIMER_PINNED)
#define init_timer_deferrable(timer) \
__init_timer((timer), TIMER_DEFERRABLE)
#define init_timer_on_stack(timer) \
__init_timer_on_stack((timer), 0)
#define __setup_timer(_timer, _fn, _data, _flags) \
do { \