IRQ: Maintain regs pointer globally rather than passing to IRQ handlers

Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)

52 files changed, 181 insertions, 208 deletions

diff --git a/drivers/char/amiserial.c b/drivers/char/amiserial.c
index 486f97c3f4e5..66086fa2d59a 100644
--- a/drivers/char/amiserial.c
+++ b/drivers/char/amiserial.c
@@ -447,7 +447,7 @@ static void check_modem_status(struct async_struct *info)
         }
 }
 
-static irqreturn_t ser_vbl_int( int irq, void *data, struct pt_regs *regs)
+static irqreturn_t ser_vbl_int( int irq, void *data)
 {
         /* vbl is just a periodic interrupt we tie into to update modem status */
         struct async_struct * info = IRQ_ports;
@@ -460,7 +460,7 @@ static irqreturn_t ser_vbl_int( int irq, void *data, struct pt_regs *regs)
         return IRQ_HANDLED;
 }
 
-static irqreturn_t ser_rx_int(int irq, void *dev_id, struct pt_regs * regs)
+static irqreturn_t ser_rx_int(int irq, void *dev_id)
 {
         struct async_struct * info;
 
@@ -480,7 +480,7 @@ static irqreturn_t ser_rx_int(int irq, void *dev_id, struct pt_regs * regs)
         return IRQ_HANDLED;
 }
 
-static irqreturn_t ser_tx_int(int irq, void *dev_id, struct pt_regs * regs)
+static irqreturn_t ser_tx_int(int irq, void *dev_id)
 {
         struct async_struct * info;
 
diff --git a/drivers/char/applicom.c b/drivers/char/applicom.c
index 10a389dafd60..1f0b752e5de1 100644
--- a/drivers/char/applicom.c
+++ b/drivers/char/applicom.c
@@ -110,7 +110,7 @@ static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *);
 static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *);
 static int ac_ioctl(struct inode *, struct file *, unsigned int,
                     unsigned long);
-static irqreturn_t ac_interrupt(int, void *, struct pt_regs *);
+static irqreturn_t ac_interrupt(int, void *);
 
 static const struct file_operations ac_fops = {
         .owner = THIS_MODULE,
@@ -617,7 +617,7 @@ static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_
         } 
 }
 
-static irqreturn_t ac_interrupt(int vec, void *dev_instance, struct pt_regs *regs)
+static irqreturn_t ac_interrupt(int vec, void *dev_instance)
 {
         unsigned int i;
         unsigned int FlagInt;
diff --git a/drivers/char/cyclades.c b/drivers/char/cyclades.c
index 87b2fb510871..e608dadece2f 100644
--- a/drivers/char/cyclades.c
+++ b/drivers/char/cyclades.c
@@ -1057,7 +1057,7 @@ detect_isa_irq(void __iomem *address)
    received, out buffer empty, modem change, etc.
  */
 static irqreturn_t
-cyy_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+cyy_interrupt(int irq, void *dev_id)
 {
   struct tty_struct *tty;
   int status;
@@ -1802,7 +1802,7 @@ cyz_handle_cmd(struct cyclades_card *cinfo)
 
 #ifdef CONFIG_CYZ_INTR
 static irqreturn_t
-cyz_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+cyz_interrupt(int irq, void *dev_id)
 {
   struct cyclades_card *cinfo;
 
diff --git a/drivers/char/drm/drm_os_linux.h b/drivers/char/drm/drm_os_linux.h
index 695115d70382..2908b72daa6e 100644
--- a/drivers/char/drm/drm_os_linux.h
+++ b/drivers/char/drm/drm_os_linux.h
@@ -38,7 +38,7 @@
                         drm_device_t    *dev    = priv->head->dev
 
 /** IRQ handler arguments and return type and values */
-#define DRM_IRQ_ARGS            int irq, void *arg, struct pt_regs *regs
+#define DRM_IRQ_ARGS            int irq, void *arg
 
 /** AGP types */
 #if __OS_HAS_AGP
diff --git a/drivers/char/ec3104_keyb.c b/drivers/char/ec3104_keyb.c
index abac18b1871c..77f58ed6d59a 100644
--- a/drivers/char/ec3104_keyb.c
+++ b/drivers/char/ec3104_keyb.c
@@ -370,7 +370,7 @@ static void e5_receive(struct e5_struct *k)
         }
 }
 
-static void ec3104_keyb_interrupt(int irq, void *data, struct pt_regs *regs)
+static void ec3104_keyb_interrupt(int irq, void *data)
 {
         struct e5_struct *k = &ec3104_keyb;
         u8 msr, lsr;
diff --git a/drivers/char/esp.c b/drivers/char/esp.c
index 05788c75d7fc..15a4ea896328 100644
--- a/drivers/char/esp.c
+++ b/drivers/char/esp.c
@@ -615,8 +615,7 @@ static inline void check_modem_status(struct esp_struct *info)
 /*
  * This is the serial driver's interrupt routine
  */
-static irqreturn_t rs_interrupt_single(int irq, void *dev_id,
-                                        struct pt_regs *regs)
+static irqreturn_t rs_interrupt_single(int irq, void *dev_id)
 {
         struct esp_struct * info;
         unsigned err_status;
diff --git a/drivers/char/ftape/lowlevel/fdc-io.c b/drivers/char/ftape/lowlevel/fdc-io.c
index 216532445652..bbcf918f056f 100644
--- a/drivers/char/ftape/lowlevel/fdc-io.c
+++ b/drivers/char/ftape/lowlevel/fdc-io.c
@@ -1243,7 +1243,7 @@ static int fdc_config(void)
         TRACE_EXIT 0;
 }
 
-static irqreturn_t ftape_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t ftape_interrupt(int irq, void *dev_id)
 {
         void (*handler) (void) = *fdc.hook;
         int handled = 0;
diff --git a/drivers/char/hangcheck-timer.c b/drivers/char/hangcheck-timer.c
index d69f2ad9a67d..1aa93a752a9c 100644
--- a/drivers/char/hangcheck-timer.c
+++ b/drivers/char/hangcheck-timer.c
@@ -159,7 +159,7 @@ static void hangcheck_fire(unsigned long data)
                 if (hangcheck_dump_tasks) {
                         printk(KERN_CRIT "Hangcheck: Task state:\n");
 #ifdef CONFIG_MAGIC_SYSRQ
-                        handle_sysrq('t', NULL, NULL);
+                        handle_sysrq('t', NULL);
 #endif  /* CONFIG_MAGIC_SYSRQ */
                 }
                 if (hangcheck_reboot) {
diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index 58b0eb581114..091a11cd878c 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -116,7 +116,7 @@ static inline void writeq(unsigned long long v, void __iomem *addr)
 }
 #endif
 
-static irqreturn_t hpet_interrupt(int irq, void *data, struct pt_regs *regs)
+static irqreturn_t hpet_interrupt(int irq, void *data)
 {
         struct hpet_dev *devp;
         unsigned long isr;
diff --git a/drivers/char/hvc_console.c b/drivers/char/hvc_console.c
index 4053d1cd393f..9902ffad3b12 100644
--- a/drivers/char/hvc_console.c
+++ b/drivers/char/hvc_console.c
@@ -294,7 +294,7 @@ static int hvc_poll(struct hvc_struct *hp);
  * NOTE: This API isn't used if the console adapter doesn't support interrupts.
  * In this case the console is poll driven.
  */
-static irqreturn_t hvc_handle_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
+static irqreturn_t hvc_handle_interrupt(int irq, void *dev_instance)
 {
         /* if hvc_poll request a repoll, then kick the hvcd thread */
         if (hvc_poll(dev_instance))
@@ -621,7 +621,7 @@ static int hvc_poll(struct hvc_struct *hp)
                                         sysrq_pressed = 1;
                                         continue;
                                 } else if (sysrq_pressed) {
-                                        handle_sysrq(buf[i], NULL, tty);
+                                        handle_sysrq(buf[i], tty);
                                         sysrq_pressed = 0;
                                         continue;
                                 }
diff --git a/drivers/char/hvcs.c b/drivers/char/hvcs.c
index 0b89bcde8c52..8728255c9463 100644
--- a/drivers/char/hvcs.c
+++ b/drivers/char/hvcs.c
@@ -313,8 +313,7 @@ static DEFINE_SPINLOCK(hvcs_structs_lock);
 
 static void hvcs_unthrottle(struct tty_struct *tty);
 static void hvcs_throttle(struct tty_struct *tty);
-static irqreturn_t hvcs_handle_interrupt(int irq, void *dev_instance,
-                struct pt_regs *regs);
+static irqreturn_t hvcs_handle_interrupt(int irq, void *dev_instance);
 
 static int hvcs_write(struct tty_struct *tty,
                 const unsigned char *buf, int count);
@@ -387,8 +386,7 @@ static void hvcs_throttle(struct tty_struct *tty)
  * handler taking any further interrupts because they are disabled which means
  * the hvcs_struct will always be valid in this handler.
  */
-static irqreturn_t hvcs_handle_interrupt(int irq, void *dev_instance,
-                struct pt_regs *regs)
+static irqreturn_t hvcs_handle_interrupt(int irq, void *dev_instance)
 {
         struct hvcs_struct *hvcsd = dev_instance;
 
diff --git a/drivers/char/hvsi.c b/drivers/char/hvsi.c
index c07dc58d5c1d..2cf63e7305a3 100644
--- a/drivers/char/hvsi.c
+++ b/drivers/char/hvsi.c
@@ -406,7 +406,7 @@ static void hvsi_insert_chars(struct hvsi_struct *hp, const char *buf, int len)
                         hp->sysrq = 1;
                         continue;
                 } else if (hp->sysrq) {
-                        handle_sysrq(c, NULL, hp->tty);
+                        handle_sysrq(c, hp->tty);
                         hp->sysrq = 0;
                         continue;
                 }
@@ -555,7 +555,7 @@ static void hvsi_send_overflow(struct hvsi_struct *hp)
  * must get all pending data because we only get an irq on empty->non-empty
  * transition
  */
-static irqreturn_t hvsi_interrupt(int irq, void *arg, struct pt_regs *regs)
+static irqreturn_t hvsi_interrupt(int irq, void *arg)
 {
         struct hvsi_struct *hp = (struct hvsi_struct *)arg;
         struct tty_struct *flip;
@@ -616,7 +616,7 @@ static int __init poll_for_state(struct hvsi_struct *hp, int state)
         unsigned long end_jiffies = jiffies + HVSI_TIMEOUT;
 
         for (;;) {
-                hvsi_interrupt(hp->virq, (void *)hp, NULL); /* get pending data */
+                hvsi_interrupt(hp->virq, (void *)hp); /* get pending data */
 
                 if (hp->state == state)
                         return 0;
diff --git a/drivers/char/ip2/ip2main.c b/drivers/char/ip2/ip2main.c
index 62ef511d143b..858ba5432c99 100644
--- a/drivers/char/ip2/ip2main.c
+++ b/drivers/char/ip2/ip2main.c
@@ -190,7 +190,7 @@ static int  ip2_tiocmset(struct tty_struct *tty, struct file *file,
 
 static void set_irq(int, int);
 static void ip2_interrupt_bh(i2eBordStrPtr pB);
-static irqreturn_t ip2_interrupt(int irq, void *dev_id, struct pt_regs * regs);
+static irqreturn_t ip2_interrupt(int irq, void *dev_id);
 static void ip2_poll(unsigned long arg);
 static inline void service_all_boards(void);
 static void do_input(void *p);
@@ -1154,10 +1154,9 @@ ip2_interrupt_bh(i2eBordStrPtr pB)
 
 
 /******************************************************************************/
-/* Function:   ip2_interrupt(int irq, void *dev_id, struct pt_regs * regs)    */
+/* Function:   ip2_interrupt(int irq, void *dev_id)    */
 /* Parameters: irq - interrupt number                                         */
 /*             pointer to optional device ID structure                        */
-/*             pointer to register structure                                  */
 /* Returns:    Nothing                                                        */
 /*                                                                            */
 /* Description:                                                               */
@@ -1173,7 +1172,7 @@ ip2_interrupt_bh(i2eBordStrPtr pB)
 /*                                                                            */
 /******************************************************************************/
 static irqreturn_t
-ip2_interrupt(int irq, void *dev_id, struct pt_regs * regs)
+ip2_interrupt(int irq, void *dev_id)
 {
         int i;
         i2eBordStrPtr  pB;
@@ -1237,7 +1236,7 @@ ip2_poll(unsigned long arg)
         // Just polled boards, IRQ = 0 will hit all non-interrupt boards.
         // It will NOT poll boards handled by hard interrupts.
         // The issue of queued BH interrups is handled in ip2_interrupt().
-        ip2_interrupt(0, NULL, NULL);
+        ip2_interrupt(0, NULL);
 
         PollTimer.expires = POLL_TIMEOUT;
         add_timer( &PollTimer );
diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index b106c45abfc9..24825bdca8f4 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -872,7 +872,7 @@ static void smi_timeout(unsigned long data)
         add_timer(&(smi_info->si_timer));
 }
 
-static irqreturn_t si_irq_handler(int irq, void *data, struct pt_regs *regs)
+static irqreturn_t si_irq_handler(int irq, void *data)
 {
         struct smi_info *smi_info = data;
         unsigned long   flags;
@@ -899,14 +899,14 @@ static irqreturn_t si_irq_handler(int irq, void *data, struct pt_regs *regs)
         return IRQ_HANDLED;
 }
 
-static irqreturn_t si_bt_irq_handler(int irq, void *data, struct pt_regs *regs)
+static irqreturn_t si_bt_irq_handler(int irq, void *data)
 {
         struct smi_info *smi_info = data;
         /* We need to clear the IRQ flag for the BT interface. */
         smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG,
                              IPMI_BT_INTMASK_CLEAR_IRQ_BIT
                              | IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
-        return si_irq_handler(irq, data, regs);
+        return si_irq_handler(irq, data);
 }
 
 static int smi_start_processing(void       *send_info,
diff --git a/drivers/char/ipmi/ipmi_watchdog.c b/drivers/char/ipmi/ipmi_watchdog.c
index accaaf1a6b69..73f759eaa5a6 100644
--- a/drivers/char/ipmi/ipmi_watchdog.c
+++ b/drivers/char/ipmi/ipmi_watchdog.c
@@ -903,7 +903,7 @@ static void ipmi_register_watchdog(int ipmi_intf)
 
 #ifdef HAVE_NMI_HANDLER
 static int
-ipmi_nmi(void *dev_id, struct pt_regs *regs, int cpu, int handled)
+ipmi_nmi(void *dev_id, int cpu, int handled)
 {
         /* If we are not expecting a timeout, ignore it. */
         if (ipmi_watchdog_state == WDOG_TIMEOUT_NONE)
diff --git a/drivers/char/isicom.c b/drivers/char/isicom.c
index ea2bbf80ad33..e9e9bf31c369 100644
--- a/drivers/char/isicom.c
+++ b/drivers/char/isicom.c
@@ -546,7 +546,7 @@ static void isicom_bottomhalf(void *data)
  *      Main interrupt handler routine
  */
 
-static irqreturn_t isicom_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t isicom_interrupt(int irq, void *dev_id)
 {
         struct isi_board *card = dev_id;
         struct isi_port *port;
diff --git a/drivers/char/keyboard.c b/drivers/char/keyboard.c
index e2011669c7bb..20b6c8b30248 100644
--- a/drivers/char/keyboard.c
+++ b/drivers/char/keyboard.c
@@ -32,6 +32,7 @@
 #include <linux/string.h>
 #include <linux/init.h>
 #include <linux/slab.h>
+#include <linux/irq.h>
 
 #include <linux/kbd_kern.h>
 #include <linux/kbd_diacr.h>
@@ -77,7 +78,7 @@ void compute_shiftstate(void);
         k_slock,        k_dead2,        k_brl,          k_ignore
 
 typedef void (k_handler_fn)(struct vc_data *vc, unsigned char value,
-                            char up_flag, struct pt_regs *regs);
+                            char up_flag);
 static k_handler_fn K_HANDLERS;
 static k_handler_fn *k_handler[16] = { K_HANDLERS };
 
@@ -88,7 +89,7 @@ static k_handler_fn *k_handler[16] = { K_HANDLERS };
         fn_boot_it,     fn_caps_on,     fn_compose,     fn_SAK,\
         fn_dec_console, fn_inc_console, fn_spawn_con,   fn_bare_num
 
-typedef void (fn_handler_fn)(struct vc_data *vc, struct pt_regs *regs);
+typedef void (fn_handler_fn)(struct vc_data *vc);
 static fn_handler_fn FN_HANDLERS;
 static fn_handler_fn *fn_handler[] = { FN_HANDLERS };
 
@@ -428,7 +429,7 @@ static unsigned int handle_diacr(struct vc_data *vc, unsigned int ch)
 /*
  * Special function handlers
  */
-static void fn_enter(struct vc_data *vc, struct pt_regs *regs)
+static void fn_enter(struct vc_data *vc)
 {
         if (diacr) {
                 if (kbd->kbdmode == VC_UNICODE)
@@ -442,27 +443,28 @@ static void fn_enter(struct vc_data *vc, struct pt_regs *regs)
                 put_queue(vc, 10);
 }
 
-static void fn_caps_toggle(struct vc_data *vc, struct pt_regs *regs)
+static void fn_caps_toggle(struct vc_data *vc)
 {
         if (rep)
                 return;
         chg_vc_kbd_led(kbd, VC_CAPSLOCK);
 }
 
-static void fn_caps_on(struct vc_data *vc, struct pt_regs *regs)
+static void fn_caps_on(struct vc_data *vc)
 {
         if (rep)
                 return;
         set_vc_kbd_led(kbd, VC_CAPSLOCK);
 }
 
-static void fn_show_ptregs(struct vc_data *vc, struct pt_regs *regs)
+static void fn_show_ptregs(struct vc_data *vc)
 {
+        struct pt_regs *regs = get_irq_regs();
         if (regs)
                 show_regs(regs);
 }
 
-static void fn_hold(struct vc_data *vc, struct pt_regs *regs)
+static void fn_hold(struct vc_data *vc)
 {
         struct tty_struct *tty = vc->vc_tty;
 
@@ -480,12 +482,12 @@ static void fn_hold(struct vc_data *vc, struct pt_regs *regs)
                 stop_tty(tty);
 }
 
-static void fn_num(struct vc_data *vc, struct pt_regs *regs)
+static void fn_num(struct vc_data *vc)
 {
         if (vc_kbd_mode(kbd,VC_APPLIC))
                 applkey(vc, 'P', 1);
         else
-                fn_bare_num(vc, regs);
+                fn_bare_num(vc);
 }
 
 /*
@@ -494,19 +496,19 @@ static void fn_num(struct vc_data *vc, struct pt_regs *regs)
  * Bind this to NumLock if you prefer that the NumLock key always
  * changes the NumLock flag.
  */
-static void fn_bare_num(struct vc_data *vc, struct pt_regs *regs)
+static void fn_bare_num(struct vc_data *vc)
 {
         if (!rep)
                 chg_vc_kbd_led(kbd, VC_NUMLOCK);
 }
 
-static void fn_lastcons(struct vc_data *vc, struct pt_regs *regs)
+static void fn_lastcons(struct vc_data *vc)
 {
         /* switch to the last used console, ChN */
         set_console(last_console);
 }
 
-static void fn_dec_console(struct vc_data *vc, struct pt_regs *regs)
+static void fn_dec_console(struct vc_data *vc)
 {
         int i, cur = fg_console;
 
@@ -523,7 +525,7 @@ static void fn_dec_console(struct vc_data *vc, struct pt_regs *regs)
         set_console(i);
 }
 
-static void fn_inc_console(struct vc_data *vc, struct pt_regs *regs)
+static void fn_inc_console(struct vc_data *vc)
 {
         int i, cur = fg_console;
 
@@ -540,7 +542,7 @@ static void fn_inc_console(struct vc_data *vc, struct pt_regs *regs)
         set_console(i);
 }
 
-static void fn_send_intr(struct vc_data *vc, struct pt_regs *regs)
+static void fn_send_intr(struct vc_data *vc)
 {
         struct tty_struct *tty = vc->vc_tty;
 
@@ -550,37 +552,37 @@ static void fn_send_intr(struct vc_data *vc, struct pt_regs *regs)
         con_schedule_flip(tty);
 }
 
-static void fn_scroll_forw(struct vc_data *vc, struct pt_regs *regs)
+static void fn_scroll_forw(struct vc_data *vc)
 {
         scrollfront(vc, 0);
 }
 
-static void fn_scroll_back(struct vc_data *vc, struct pt_regs *regs)
+static void fn_scroll_back(struct vc_data *vc)
 {
         scrollback(vc, 0);
 }
 
-static void fn_show_mem(struct vc_data *vc, struct pt_regs *regs)
+static void fn_show_mem(struct vc_data *vc)
 {
         show_mem();
 }
 
-static void fn_show_state(struct vc_data *vc, struct pt_regs *regs)
+static void fn_show_state(struct vc_data *vc)
 {
         show_state();
 }
 
-static void fn_boot_it(struct vc_data *vc, struct pt_regs *regs)
+static void fn_boot_it(struct vc_data *vc)
 {
         ctrl_alt_del();
 }
 
-static void fn_compose(struct vc_data *vc, struct pt_regs *regs)
+static void fn_compose(struct vc_data *vc)
 {
         dead_key_next = 1;
 }
 
-static void fn_spawn_con(struct vc_data *vc, struct pt_regs *regs)
+static void fn_spawn_con(struct vc_data *vc)
 {
         spin_lock(&vt_spawn_con.lock);
         if (vt_spawn_con.pid)
@@ -591,7 +593,7 @@ static void fn_spawn_con(struct vc_data *vc, struct pt_regs *regs)
         spin_unlock(&vt_spawn_con.lock);
 }
 
-static void fn_SAK(struct vc_data *vc, struct pt_regs *regs)
+static void fn_SAK(struct vc_data *vc)
 {
         struct tty_struct *tty = vc->vc_tty;
 
@@ -604,7 +606,7 @@ static void fn_SAK(struct vc_data *vc, struct pt_regs *regs)
         reset_vc(vc);
 }
 
-static void fn_null(struct vc_data *vc, struct pt_regs *regs)
+static void fn_null(struct vc_data *vc)
 {
         compute_shiftstate();
 }
@@ -612,11 +614,11 @@ static void fn_null(struct vc_data *vc, struct pt_regs *regs)
 /*
  * Special key handlers
  */
-static void k_ignore(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
+static void k_ignore(struct vc_data *vc, unsigned char value, char up_flag)
 {
 }
 
-static void k_spec(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
+static void k_spec(struct vc_data *vc, unsigned char value, char up_flag)
 {
         if (up_flag)
                 return;
@@ -626,15 +628,15 @@ static void k_spec(struct vc_data *vc, unsigned char value, char up_flag, struct
              kbd->kbdmode == VC_MEDIUMRAW) &&
              value != KVAL(K_SAK))
                 return;         /* SAK is allowed even in raw mode */
-        fn_handler[value](vc, regs);
+        fn_handler[value](vc);
 }
 
-static void k_lowercase(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
+static void k_lowercase(struct vc_data *vc, unsigned char value, char up_flag)
 {
         printk(KERN_ERR "keyboard.c: k_lowercase was called - impossible\n");
 }
 
-static void k_unicode(struct vc_data *vc, unsigned int value, char up_flag, struct pt_regs *regs)
+static void k_unicode(struct vc_data *vc, unsigned int value, char up_flag)
 {
         if (up_flag)
                 return;         /* no action, if this is a key release */
@@ -658,41 +660,41 @@ static void k_unicode(struct vc_data *vc, unsigned int value, char up_flag, stru
  * dead keys modifying the same character. Very useful
  * for Vietnamese.
  */
-static void k_deadunicode(struct vc_data *vc, unsigned int value, char up_flag, struct pt_regs *regs)
+static void k_deadunicode(struct vc_data *vc, unsigned int value, char up_flag)
 {
         if (up_flag)
                 return;
         diacr = (diacr ? handle_diacr(vc, value) : value);
 }
 
-static void k_self(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
+static void k_self(struct vc_data *vc, unsigned char value, char up_flag)
 {
-        k_unicode(vc, value, up_flag, regs);
+        k_unicode(vc, value, up_flag);
 }
 
-static void k_dead2(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
+static void k_dead2(struct vc_data *vc, unsigned char value, char up_flag)
 {
-        k_deadunicode(vc, value, up_flag, regs);
+        k_deadunicode(vc, value, up_flag);
 }
 
 /*
  * Obsolete - for backwards compatibility only
  */
-static void k_dead(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
+static void k_dead(struct vc_data *vc, unsigned char value, char up_flag)
 {
         static const unsigned char ret_diacr[NR_DEAD] = {'`', '\'', '^', '~', '"', ',' };
         value = ret_diacr[value];
-        k_deadunicode(vc, value, up_flag, regs);
+        k_deadunicode(vc, value, up_flag);
 }
 
-static void k_cons(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
+static void k_cons(struct vc_data *vc, unsigned char value, char up_flag)
 {
         if (up_flag)
                 return;
         set_console(value);
 }
 
-static void k_fn(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
+static void k_fn(struct vc_data *vc, unsigned char value, char up_flag)
 {
         unsigned v;
 
@@ -706,7 +708,7 @@ static void k_fn(struct vc_data *vc, unsigned char value, char up_flag, struct p
                 printk(KERN_ERR "k_fn called with value=%d\n", value);
 }
 
-static void k_cur(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
+static void k_cur(struct vc_data *vc, unsigned char value, char up_flag)
 {
         static const char *cur_chars = "BDCA";
 
@@ -715,7 +717,7 @@ static void k_cur(struct vc_data *vc, unsigned char value, char up_flag, struct
         applkey(vc, cur_chars[value], vc_kbd_mode(kbd, VC_CKMODE));
 }
 
-static void k_pad(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
+static void k_pad(struct vc_data *vc, unsigned char value, char up_flag)
 {
         static const char pad_chars[] = "0123456789+-*/\015,.?()#";
         static const char app_map[] = "pqrstuvwxylSRQMnnmPQS";
@@ -733,34 +735,34 @@ static void k_pad(struct vc_data *vc, unsigned char value, char up_flag, struct
                 switch (value) {
                         case KVAL(K_PCOMMA):
                         case KVAL(K_PDOT):
-                                k_fn(vc, KVAL(K_REMOVE), 0, regs);
+                                k_fn(vc, KVAL(K_REMOVE), 0);
                                 return;
                         case KVAL(K_P0):
-                                k_fn(vc, KVAL(K_INSERT), 0, regs);
+                                k_fn(vc, KVAL(K_INSERT), 0);
                                 return;
                         case KVAL(K_P1):
-                                k_fn(vc, KVAL(K_SELECT), 0, regs);
+                                k_fn(vc, KVAL(K_SELECT), 0);
                                 return;
                         case KVAL(K_P2):
-                                k_cur(vc, KVAL(K_DOWN), 0, regs);
+                                k_cur(vc, KVAL(K_DOWN), 0);
                                 return;
                         case KVAL(K_P3):
-                                k_fn(vc, KVAL(K_PGDN), 0, regs);
+                                k_fn(vc, KVAL(K_PGDN), 0);
                                 return;
                         case KVAL(K_P4):
-                                k_cur(vc, KVAL(K_LEFT), 0, regs);
+                                k_cur(vc, KVAL(K_LEFT), 0);
                                 return;
                         case KVAL(K_P6):
-                                k_cur(vc, KVAL(K_RIGHT), 0, regs);
+                                k_cur(vc, KVAL(K_RIGHT), 0);
                                 return;
                         case KVAL(K_P7):
-                                k_fn(vc, KVAL(K_FIND), 0, regs);
+                                k_fn(vc, KVAL(K_FIND), 0);
                                 return;
                         case KVAL(K_P8):
-                                k_cur(vc, KVAL(K_UP), 0, regs);
+                                k_cur(vc, KVAL(K_UP), 0);
                                 return;
                         case KVAL(K_P9):
-                                k_fn(vc, KVAL(K_PGUP), 0, regs);
+                                k_fn(vc, KVAL(K_PGUP), 0);
                                 return;
                         case KVAL(K_P5):
                                 applkey(vc, 'G', vc_kbd_mode(kbd, VC_APPLIC));
@@ -772,7 +774,7 @@ static void k_pad(struct vc_data *vc, unsigned char value, char up_flag, struct
                 put_queue(vc, 10);
 }
 
-static void k_shift(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
+static void k_shift(struct vc_data *vc, unsigned char value, char up_flag)
 {
         int old_state = shift_state;
 
@@ -813,7 +815,7 @@ static void k_shift(struct vc_data *vc, unsigned char value, char up_flag, struc
         }
 }
 
-static void k_meta(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
+static void k_meta(struct vc_data *vc, unsigned char value, char up_flag)
 {
         if (up_flag)
                 return;
@@ -825,7 +827,7 @@ static void k_meta(struct vc_data *vc, unsigned char value, char up_flag, struct
                 put_queue(vc, value | 0x80);
 }
 
-static void k_ascii(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
+static void k_ascii(struct vc_data *vc, unsigned char value, char up_flag)
 {
         int base;
 
@@ -847,16 +849,16 @@ static void k_ascii(struct vc_data *vc, unsigned char value, char up_flag, struc
                 npadch = npadch * base + value;
 }
 
-static void k_lock(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
+static void k_lock(struct vc_data *vc, unsigned char value, char up_flag)
 {
         if (up_flag || rep)
                 return;
         chg_vc_kbd_lock(kbd, value);
 }
 
-static void k_slock(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
+static void k_slock(struct vc_data *vc, unsigned char value, char up_flag)
 {
-        k_shift(vc, value, up_flag, regs);
+        k_shift(vc, value, up_flag);
         if (up_flag || rep)
                 return;
         chg_vc_kbd_slock(kbd, value);
@@ -876,25 +878,25 @@ static unsigned brl_nbchords = 1;
 MODULE_PARM_DESC(brl_nbchords, "Number of chords that produce a braille pattern (0 for dead chords)");
 module_param(brl_nbchords, uint, 0644);
 
-static void k_brlcommit(struct vc_data *vc, unsigned int pattern, char up_flag, struct pt_regs *regs)
+static void k_brlcommit(struct vc_data *vc, unsigned int pattern, char up_flag)
 {
         static unsigned long chords;
         static unsigned committed;
 
         if (!brl_nbchords)
-                k_deadunicode(vc, BRL_UC_ROW | pattern, up_flag, regs);
+                k_deadunicode(vc, BRL_UC_ROW | pattern, up_flag);
         else {
                 committed |= pattern;
                 chords++;
                 if (chords == brl_nbchords) {
-                        k_unicode(vc, BRL_UC_ROW | committed, up_flag, regs);
+                        k_unicode(vc, BRL_UC_ROW | committed, up_flag);
                         chords = 0;
                         committed = 0;
                 }
         }
 }
 
-static void k_brl(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
+static void k_brl(struct vc_data *vc, unsigned char value, char up_flag)
 {
         static unsigned pressed,committing;
         static unsigned long releasestart;
@@ -906,7 +908,7 @@ static void k_brl(struct vc_data *vc, unsigned char value, char up_flag, struct
         }
 
         if (!value) {
-                k_unicode(vc, BRL_UC_ROW, up_flag, regs);
+                k_unicode(vc, BRL_UC_ROW, up_flag);
                 return;
         }
 
@@ -923,13 +925,13 @@ static void k_brl(struct vc_data *vc, unsigned char value, char up_flag, struct
                         pressed &= ~(1 << (value - 1));
                         if (!pressed) {
                                 if (committing) {
-                                        k_brlcommit(vc, committing, 0, regs);
+                                        k_brlcommit(vc, committing, 0);
                                         committing = 0;
                                 }
                         }
                 } else {
                         if (committing) {
-                                k_brlcommit(vc, committing, 0, regs);
+                                k_brlcommit(vc, committing, 0);
                                 committing = 0;
                         }
                         pressed &= ~(1 << (value - 1));
@@ -1133,8 +1135,7 @@ static void kbd_rawcode(unsigned char data)
                 put_queue(vc, data);
 }
 
-static void kbd_keycode(unsigned int keycode, int down,
-                        int hw_raw, struct pt_regs *regs)
+static void kbd_keycode(unsigned int keycode, int down, int hw_raw)
 {
         struct vc_data *vc = vc_cons[fg_console].d;
         unsigned short keysym, *key_map;
@@ -1181,7 +1182,7 @@ static void kbd_keycode(unsigned int keycode, int down,
         if (sysrq_down && !down && keycode == sysrq_alt_use)
                 sysrq_down = 0;
         if (sysrq_down && down && !rep) {
-                handle_sysrq(kbd_sysrq_xlate[keycode], regs, tty);
+                handle_sysrq(kbd_sysrq_xlate[keycode], tty);
                 return;
         }
 #endif
@@ -1267,7 +1268,7 @@ static void kbd_keycode(unsigned int keycode, int down,
                 }
         }
 
-        (*k_handler[type])(vc, keysym & 0xff, !down, regs);
+        (*k_handler[type])(vc, keysym & 0xff, !down);
 
         if (type != KT_SLOCK)
                 kbd->slockstate = 0;
@@ -1279,7 +1280,7 @@ static void kbd_event(struct input_handle *handle, unsigned int event_type,
         if (event_type == EV_MSC && event_code == MSC_RAW && HW_RAW(handle->dev))
                 kbd_rawcode(value);
         if (event_type == EV_KEY)
-                kbd_keycode(event_code, value, HW_RAW(handle->dev), handle->dev->regs);
+                kbd_keycode(event_code, value, HW_RAW(handle->dev));
         tasklet_schedule(&keyboard_tasklet);
         do_poke_blanked_console = 1;
         schedule_console_callback();
diff --git a/drivers/char/mbcs.c b/drivers/char/mbcs.c
index 636354722658..0afb7ba999cf 100644
--- a/drivers/char/mbcs.c
+++ b/drivers/char/mbcs.c
@@ -516,11 +516,10 @@ int mbcs_gscr_mmap(struct file *fp, struct vm_area_struct *vma)
  * mbcs_completion_intr_handler - Primary completion handler.
  * @irq: irq
  * @arg: soft struct for device
- * @ep: regs
  *
  */
 static irqreturn_t
-mbcs_completion_intr_handler(int irq, void *arg, struct pt_regs *ep)
+mbcs_completion_intr_handler(int irq, void *arg)
 {
         struct mbcs_soft *soft = (struct mbcs_soft *)arg;
         void *mmr_base;
diff --git a/drivers/char/mmtimer.c b/drivers/char/mmtimer.c
index 1f0f2b6dae26..22b9905c1e52 100644
--- a/drivers/char/mmtimer.c
+++ b/drivers/char/mmtimer.c
@@ -422,7 +422,6 @@ static int inline reschedule_periodic_timer(mmtimer_t *x)
  * mmtimer_interrupt - timer interrupt handler
  * @irq: irq received
  * @dev_id: device the irq came from
- * @regs: register state upon receipt of the interrupt
  *
  * Called when one of the comarators matches the counter, This
  * routine will send signals to processes that have requested
@@ -433,7 +432,7 @@ static int inline reschedule_periodic_timer(mmtimer_t *x)
  * registers.
  */
 static irqreturn_t
-mmtimer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+mmtimer_interrupt(int irq, void *dev_id)
 {
         int i;
         unsigned long expires = 0;
diff --git a/drivers/char/mwave/tp3780i.c b/drivers/char/mwave/tp3780i.c
index cc3e54dd7234..f282976daaac 100644
--- a/drivers/char/mwave/tp3780i.c
+++ b/drivers/char/mwave/tp3780i.c
@@ -95,14 +95,14 @@ static void EnableSRAM(THINKPAD_BD_DATA * pBDData)
 }
 
 
-static irqreturn_t UartInterrupt(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t UartInterrupt(int irq, void *dev_id)
 {
         PRINTK_3(TRACE_TP3780I,
                 "tp3780i::UartInterrupt entry irq %x dev_id %p\n", irq, dev_id);
         return IRQ_HANDLED;
 }
 
-static irqreturn_t DspInterrupt(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t DspInterrupt(int irq, void *dev_id)
 {
         pMWAVE_DEVICE_DATA pDrvData = &mwave_s_mdd;
         DSP_3780I_CONFIG_SETTINGS *pSettings = &pDrvData->rBDData.rDspSettings;
diff --git a/drivers/char/mxser.c b/drivers/char/mxser.c
index 8253fca8efd5..048d91142c17 100644
--- a/drivers/char/mxser.c
+++ b/drivers/char/mxser.c
@@ -407,7 +407,7 @@ static void mxser_stop(struct tty_struct *);
 static void mxser_start(struct tty_struct *);
 static void mxser_hangup(struct tty_struct *);
 static void mxser_rs_break(struct tty_struct *, int);
-static irqreturn_t mxser_interrupt(int, void *, struct pt_regs *);
+static irqreturn_t mxser_interrupt(int, void *);
 static void mxser_receive_chars(struct mxser_struct *, int *);
 static void mxser_transmit_chars(struct mxser_struct *);
 static void mxser_check_modem_status(struct mxser_struct *, int);
@@ -1916,7 +1916,7 @@ static void mxser_rs_break(struct tty_struct *tty, int break_state)
 /*
  * This is the serial driver's generic interrupt routine
  */
-static irqreturn_t mxser_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t mxser_interrupt(int irq, void *dev_id)
 {
         int status, iir, i;
         struct mxser_struct *info;
diff --git a/drivers/char/nwbutton.c b/drivers/char/nwbutton.c
index ea1aa7764f8e..2d264971d839 100644
--- a/drivers/char/nwbutton.c
+++ b/drivers/char/nwbutton.c
@@ -144,7 +144,7 @@ static void button_sequence_finished (unsigned long parameters)
  *  increments the counter.
  */ 
 
-static irqreturn_t button_handler (int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t button_handler (int irq, void *dev_id)
 {
         if (button_press_count) {
                 del_timer (&button_timer);
diff --git a/drivers/char/nwbutton.h b/drivers/char/nwbutton.h
index ddb7b928dcbb..c3ebc16ce8a7 100644
--- a/drivers/char/nwbutton.h
+++ b/drivers/char/nwbutton.h
@@ -25,7 +25,7 @@ struct button_callback {
 /* Function prototypes: */
 
 static void button_sequence_finished (unsigned long parameters);
-static irqreturn_t button_handler (int irq, void *dev_id, struct pt_regs *regs);
+static irqreturn_t button_handler (int irq, void *dev_id);
 int button_init (void);
 int button_add_callback (void (*callback) (void), int count);
 int button_del_callback (void (*callback) (void));
diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
index 73e324209913..1a0bc30b79d1 100644
--- a/drivers/char/pcmcia/synclink_cs.c
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -416,7 +416,7 @@ static void rx_reset_buffers(MGSLPC_INFO *info);
 static int  rx_alloc_buffers(MGSLPC_INFO *info);
 static void rx_free_buffers(MGSLPC_INFO *info);
 
-static irqreturn_t mgslpc_isr(int irq, void *dev_id, struct pt_regs * regs);
+static irqreturn_t mgslpc_isr(int irq, void *dev_id);
 
 /*
  * Bottom half interrupt handlers
@@ -1234,9 +1234,8 @@ static void ri_change(MGSLPC_INFO *info)
  * 
  * irq     interrupt number that caused interrupt
  * dev_id  device ID supplied during interrupt registration
- * regs    interrupted processor context
  */
-static irqreturn_t mgslpc_isr(int irq, void *dev_id, struct pt_regs * regs)
+static irqreturn_t mgslpc_isr(int irq, void *dev_id)
 {
         MGSLPC_INFO * info = (MGSLPC_INFO *)dev_id;
         unsigned short isr;
diff --git a/drivers/char/ppdev.c b/drivers/char/ppdev.c
index 520d2cf82bc0..efc485edad1c 100644
--- a/drivers/char/ppdev.c
+++ b/drivers/char/ppdev.c
@@ -269,7 +269,7 @@ static ssize_t pp_write (struct file * file, const char __user * buf,
         return bytes_written;
 }
 
-static void pp_irq (int irq, void * private, struct pt_regs * unused)
+static void pp_irq (int irq, void * private)
 {
         struct pp_struct * pp = (struct pp_struct *) private;
 
diff --git a/drivers/char/qtronix.c b/drivers/char/qtronix.c
index 9d134e98d2a0..5c9477741a30 100644
--- a/drivers/char/qtronix.c
+++ b/drivers/char/qtronix.c
@@ -93,7 +93,7 @@ struct cir_port *cir;
 static unsigned char kbdbytes[5];
 static unsigned char cir_data[32]; /* we only need 16 chars */
 
-static void kbd_int_handler(int irq, void *dev_id, struct pt_regs *regs);
+static void kbd_int_handler(int irq, void *dev_id);
 static int handle_data(unsigned char *p_data);
 static inline void handle_mouse_event(unsigned char scancode);
 static inline void handle_keyboard_event(unsigned char scancode, int down);
@@ -197,7 +197,7 @@ int CheckSumOk(u_int8_t byte1, u_int8_t byte2,
 }
 
 
-static void kbd_int_handler(int irq, void *dev_id, struct pt_regs *regs)
+static void kbd_int_handler(int irq, void *dev_id)
 {
         struct cir_port *cir;
         int j;
diff --git a/drivers/char/rio/rio_linux.c b/drivers/char/rio/rio_linux.c
index 202a3b0945b7..3bea594600d4 100644
--- a/drivers/char/rio/rio_linux.c
+++ b/drivers/char/rio/rio_linux.c
@@ -363,7 +363,7 @@ static void rio_reset_interrupt(struct Host *HostP)
 }
 
 
-static irqreturn_t rio_interrupt(int irq, void *ptr, struct pt_regs *regs)
+static irqreturn_t rio_interrupt(int irq, void *ptr)
 {
         struct Host *HostP;
         func_enter();
@@ -417,7 +417,7 @@ static void rio_pollfunc(unsigned long data)
 {
         func_enter();
 
-        rio_interrupt(0, &p->RIOHosts[data], NULL);
+        rio_interrupt(0, &p->RIOHosts[data]);
         p->RIOHosts[data].timer.expires = jiffies + rio_poll;
         add_timer(&p->RIOHosts[data].timer);
 
diff --git a/drivers/char/riscom8.c b/drivers/char/riscom8.c
index b0ab3f28cc6a..be68cfb0ae69 100644
--- a/drivers/char/riscom8.c
+++ b/drivers/char/riscom8.c
@@ -550,7 +550,7 @@ static inline void rc_check_modem(struct riscom_board const * bp)
 }
 
 /* The main interrupt processing routine */
-static irqreturn_t rc_interrupt(int irq, void * dev_id, struct pt_regs * regs)
+static irqreturn_t rc_interrupt(int irq, void * dev_id)
 {
         unsigned char status;
         unsigned char ack;
diff --git a/drivers/char/rtc.c b/drivers/char/rtc.c
index 656f8c0ca52e..abee7a339462 100644
--- a/drivers/char/rtc.c
+++ b/drivers/char/rtc.c
@@ -113,9 +113,9 @@ static int rtc_has_irq = 1;
 #define hpet_set_rtc_irq_bit(arg)               0
 #define hpet_rtc_timer_init()                   do { } while (0)
 #define hpet_rtc_dropped_irq()                  0
-static inline irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id, struct pt_regs *regs) {return 0;}
+static inline irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id) {return 0;}
 #else
-extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id, struct pt_regs *regs);
+extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id);
 #endif
 
 /*
@@ -229,7 +229,7 @@ static inline unsigned char rtc_is_updating(void)
  *      (See ./arch/XXXX/kernel/time.c for the set_rtc_mmss() function.)
  */
 
-irqreturn_t rtc_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+irqreturn_t rtc_interrupt(int irq, void *dev_id)
 {
         /*
          *      Can be an alarm interrupt, update complete interrupt,
@@ -915,7 +915,7 @@ static const struct file_operations rtc_proc_fops = {
 };
 
 #if defined(RTC_IRQ) && !defined(__sparc__)
-static irqreturn_t (*rtc_int_handler_ptr)(int irq, void *dev_id, struct pt_regs *regs);
+static irq_handler_t rtc_int_handler_ptr;
 #endif
 
 static int __init rtc_init(void)
diff --git a/drivers/char/ser_a2232.c b/drivers/char/ser_a2232.c
index 65c751d0d643..4217d38caef9 100644
--- a/drivers/char/ser_a2232.c
+++ b/drivers/char/ser_a2232.c
@@ -111,7 +111,7 @@
 
 /***************************** Prototypes ***************************/
 /* The interrupt service routine */
-static irqreturn_t a2232_vbl_inter(int irq, void *data, struct pt_regs *fp);
+static irqreturn_t a2232_vbl_inter(int irq, void *data);
 /* Initialize the port structures */
 static void a2232_init_portstructs(void);
 /* Initialize and register TTY drivers. */
@@ -504,7 +504,7 @@ static int  a2232_open(struct tty_struct * tty, struct file * filp)
 }
 /*** END OF FUNCTIONS EXPECTED BY TTY DRIVER STRUCTS ***/
 
-static irqreturn_t a2232_vbl_inter(int irq, void *data, struct pt_regs *fp)
+static irqreturn_t a2232_vbl_inter(int irq, void *data)
 {
 #if A2232_IOBUFLEN != 256
 #error "Re-Implement a2232_vbl_inter()!"
diff --git a/drivers/char/serial167.c b/drivers/char/serial167.c
index f4809c8183cc..6f13f98e3171 100644
--- a/drivers/char/serial167.c
+++ b/drivers/char/serial167.c
@@ -370,7 +370,7 @@ cy_sched_event(struct cyclades_port *info, int event)
    received, out buffer empty, modem change, etc.
  */
 static irqreturn_t
-cd2401_rxerr_interrupt(int irq, void *dev_id, struct pt_regs *fp)
+cd2401_rxerr_interrupt(int irq, void *dev_id)
 {
     struct tty_struct *tty;
     struct cyclades_port *info;
@@ -451,7 +451,7 @@ cd2401_rxerr_interrupt(int irq, void *dev_id, struct pt_regs *fp)
 } /* cy_rxerr_interrupt */
 
 static irqreturn_t
-cd2401_modem_interrupt(int irq, void *dev_id, struct pt_regs *fp)
+cd2401_modem_interrupt(int irq, void *dev_id)
 {
     struct cyclades_port *info;
     volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
@@ -506,7 +506,7 @@ cd2401_modem_interrupt(int irq, void *dev_id, struct pt_regs *fp)
 } /* cy_modem_interrupt */
 
 static irqreturn_t
-cd2401_tx_interrupt(int irq, void *dev_id, struct pt_regs *fp)
+cd2401_tx_interrupt(int irq, void *dev_id)
 {
     struct cyclades_port *info;
     volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
@@ -626,7 +626,7 @@ cd2401_tx_interrupt(int irq, void *dev_id, struct pt_regs *fp)
 } /* cy_tx_interrupt */
 
 static irqreturn_t
-cd2401_rx_interrupt(int irq, void *dev_id, struct pt_regs *fp)
+cd2401_rx_interrupt(int irq, void *dev_id)
 {
     struct tty_struct *tty;
     struct cyclades_port *info;
diff --git a/drivers/char/snsc.c b/drivers/char/snsc.c
index 07e0b75f2338..52753e723eaa 100644
--- a/drivers/char/snsc.c
+++ b/drivers/char/snsc.c
@@ -34,7 +34,7 @@
 #define SCDRV_TIMEOUT   1000
 
 static irqreturn_t
-scdrv_interrupt(int irq, void *subch_data, struct pt_regs *regs)
+scdrv_interrupt(int irq, void *subch_data)
 {
         struct subch_data_s *sd = subch_data;
         unsigned long flags;
diff --git a/drivers/char/snsc_event.c b/drivers/char/snsc_event.c
index 864854c58866..2f56e8c54897 100644
--- a/drivers/char/snsc_event.c
+++ b/drivers/char/snsc_event.c
@@ -36,7 +36,7 @@ DECLARE_TASKLET(sn_sysctl_event, scdrv_event, 0);
  * destination.
  */
 static irqreturn_t
-scdrv_event_interrupt(int irq, void *subch_data, struct pt_regs *regs)
+scdrv_event_interrupt(int irq, void *subch_data)
 {
         struct subch_data_s *sd = subch_data;
         unsigned long flags;
diff --git a/drivers/char/sonypi.c b/drivers/char/sonypi.c
index d4e434d694b7..c084149153de 100644
--- a/drivers/char/sonypi.c
+++ b/drivers/char/sonypi.c
@@ -826,7 +826,7 @@ static void sonypi_report_input_event(u8 event)
 }
 
 /* Interrupt handler: some event is available */
-static irqreturn_t sonypi_irq(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t sonypi_irq(int irq, void *dev_id)
 {
         u8 v1, v2, event = 0;
         int i, j;
diff --git a/drivers/char/specialix.c b/drivers/char/specialix.c
index 902c48dca3bc..6022495571ae 100644
--- a/drivers/char/specialix.c
+++ b/drivers/char/specialix.c
@@ -200,7 +200,7 @@ static struct specialix_port sx_port[SX_NBOARD * SX_NPORT];
 
 #ifdef SPECIALIX_TIMER
 static struct timer_list missed_irq_timer;
-static irqreturn_t sx_interrupt(int irq, void * dev_id, struct pt_regs * regs);
+static irqreturn_t sx_interrupt(int irq, void * dev_id);
 #endif
 
 
@@ -897,7 +897,7 @@ static inline void sx_check_modem(struct specialix_board * bp)
 
 
 /* The main interrupt processing routine */
-static irqreturn_t sx_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t sx_interrupt(int irq, void *dev_id)
 {
         unsigned char status;
         unsigned char ack;
diff --git a/drivers/char/stallion.c b/drivers/char/stallion.c
index bd711537ec4e..522e88e395cc 100644
--- a/drivers/char/stallion.c
+++ b/drivers/char/stallion.c
@@ -1927,13 +1927,12 @@ stl_readdone:
  *      calls off to the approrpriate board interrupt handlers.
  */
 
-static irqreturn_t stl_intr(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t stl_intr(int irq, void *dev_id)
 {
         stlbrd_t        *brdp = (stlbrd_t *) dev_id;
 
 #ifdef DEBUG
-        printk("stl_intr(brdp=%x,irq=%d,regs=%x)\n", (int) brdp, irq,
-            (int) regs);
+        printk("stl_intr(brdp=%x,irq=%d)\n", (int) brdp, irq);
 #endif
 
         return IRQ_RETVAL((* brdp->isr)(brdp));
diff --git a/drivers/char/sx.c b/drivers/char/sx.c
index 8fd71a5fc619..5fec626598cd 100644
--- a/drivers/char/sx.c
+++ b/drivers/char/sx.c
@@ -1192,7 +1192,7 @@ static inline void sx_check_modem_signals (struct sx_port *port)
  * Small, elegant, clear.
  */
 
-static irqreturn_t sx_interrupt (int irq, void *ptr, struct pt_regs *regs)
+static irqreturn_t sx_interrupt (int irq, void *ptr)
 {
         struct sx_board *board = ptr;
         struct sx_port *port;
@@ -1300,7 +1300,7 @@ static void sx_pollfunc (unsigned long data)
 
         func_enter ();
 
-        sx_interrupt (0, board, NULL);
+        sx_interrupt (0, board);
 
         init_timer(&board->timer);
 
diff --git a/drivers/char/synclink.c b/drivers/char/synclink.c
index a4150c4519c4..f2864cc64240 100644
--- a/drivers/char/synclink.c
+++ b/drivers/char/synclink.c
@@ -1698,11 +1698,10 @@ static void mgsl_isr_transmit_dma( struct mgsl_struct *info )
  * 
  *      irq             interrupt number that caused interrupt
  *      dev_id          device ID supplied during interrupt registration
- *      regs            interrupted processor context
  *      
  * Return Value: None
  */
-static irqreturn_t mgsl_interrupt(int irq, void *dev_id, struct pt_regs * regs)
+static irqreturn_t mgsl_interrupt(int irq, void *dev_id)
 {
         struct mgsl_struct * info;
         u16 UscVector;
diff --git a/drivers/char/synclink_gt.c b/drivers/char/synclink_gt.c
index bdc7cb248b8f..d4334c79f8d4 100644
--- a/drivers/char/synclink_gt.c
+++ b/drivers/char/synclink_gt.c
@@ -491,7 +491,7 @@ static void isr_serial(struct slgt_info *info);
 static void isr_rdma(struct slgt_info *info);
 static void isr_txeom(struct slgt_info *info, unsigned short status);
 static void isr_tdma(struct slgt_info *info);
-static irqreturn_t slgt_interrupt(int irq, void *dev_id, struct pt_regs * regs);
+static irqreturn_t slgt_interrupt(int irq, void *dev_id);
 
 static int  alloc_dma_bufs(struct slgt_info *info);
 static void free_dma_bufs(struct slgt_info *info);
@@ -2217,9 +2217,8 @@ static void isr_gpio(struct slgt_info *info, unsigned int changed, unsigned int
  *
  *      irq     interrupt number
  *      dev_id  device ID supplied during interrupt registration
- *      regs    interrupted processor context
  */
-static irqreturn_t slgt_interrupt(int irq, void *dev_id, struct pt_regs * regs)
+static irqreturn_t slgt_interrupt(int irq, void *dev_id)
 {
         struct slgt_info *info;
         unsigned int gsr;
diff --git a/drivers/char/synclinkmp.c b/drivers/char/synclinkmp.c
index 6eb75dcd7961..3e932b681371 100644
--- a/drivers/char/synclinkmp.c
+++ b/drivers/char/synclinkmp.c
@@ -2596,8 +2596,7 @@ void isr_io_pin( SLMP_INFO *info, u16 status )
  *      dev_id          device ID supplied during interrupt registration
  *      regs            interrupted processor context
  */
-static irqreturn_t synclinkmp_interrupt(int irq, void *dev_id,
-                                        struct pt_regs *regs)
+static irqreturn_t synclinkmp_interrupt(int irq, void *dev_id)
 {
         SLMP_INFO * info;
         unsigned char status, status0, status1=0;
diff --git a/drivers/char/sysrq.c b/drivers/char/sysrq.c
index 6b4d4d1e343d..4c0e08685705 100644
--- a/drivers/char/sysrq.c
+++ b/drivers/char/sysrq.c
@@ -35,14 +35,14 @@
 #include <linux/vt_kern.h>
 #include <linux/workqueue.h>
 #include <linux/kexec.h>
+#include <linux/irq.h>
 
 #include <asm/ptrace.h>
 
 /* Whether we react on sysrq keys or just ignore them */
 int sysrq_enabled = 1;
 
-static void sysrq_handle_loglevel(int key, struct pt_regs *pt_regs,
-                                  struct tty_struct *tty)
+static void sysrq_handle_loglevel(int key, struct tty_struct *tty)
 {
         int i;
         i = key - '0';
@@ -58,8 +58,7 @@ static struct sysrq_key_op sysrq_loglevel_op = {
 };
 
 #ifdef CONFIG_VT
-static void sysrq_handle_SAK(int key, struct pt_regs *pt_regs,
-                             struct tty_struct *tty)
+static void sysrq_handle_SAK(int key, struct tty_struct *tty)
 {
         if (tty)
                 do_SAK(tty);
@@ -76,8 +75,7 @@ static struct sysrq_key_op sysrq_SAK_op = {
 #endif
 
 #ifdef CONFIG_VT
-static void sysrq_handle_unraw(int key, struct pt_regs *pt_regs,
-                               struct tty_struct *tty)
+static void sysrq_handle_unraw(int key, struct tty_struct *tty)
 {
         struct kbd_struct *kbd = &kbd_table[fg_console];
 
@@ -95,10 +93,9 @@ static struct sysrq_key_op sysrq_unraw_op = {
 #endif /* CONFIG_VT */
 
 #ifdef CONFIG_KEXEC
-static void sysrq_handle_crashdump(int key, struct pt_regs *pt_regs,
-                                struct tty_struct *tty)
+static void sysrq_handle_crashdump(int key, struct tty_struct *tty)
 {
-        crash_kexec(pt_regs);
+        crash_kexec(get_irq_regs());
 }
 static struct sysrq_key_op sysrq_crashdump_op = {
         .handler        = sysrq_handle_crashdump,
@@ -110,8 +107,7 @@ static struct sysrq_key_op sysrq_crashdump_op = {
 #define sysrq_crashdump_op (*(struct sysrq_key_op *)0)
 #endif
 
-static void sysrq_handle_reboot(int key, struct pt_regs *pt_regs,
-                                struct tty_struct *tty)
+static void sysrq_handle_reboot(int key, struct tty_struct *tty)
 {
         lockdep_off();
         local_irq_enable();
@@ -124,8 +120,7 @@ static struct sysrq_key_op sysrq_reboot_op = {
         .enable_mask    = SYSRQ_ENABLE_BOOT,
 };
 
-static void sysrq_handle_sync(int key, struct pt_regs *pt_regs,
-                              struct tty_struct *tty)
+static void sysrq_handle_sync(int key, struct tty_struct *tty)
 {
         emergency_sync();
 }
@@ -136,8 +131,7 @@ static struct sysrq_key_op sysrq_sync_op = {
         .enable_mask    = SYSRQ_ENABLE_SYNC,
 };
 
-static void sysrq_handle_mountro(int key, struct pt_regs *pt_regs,
-                                 struct tty_struct *tty)
+static void sysrq_handle_mountro(int key, struct tty_struct *tty)
 {
         emergency_remount();
 }
@@ -149,8 +143,7 @@ static struct sysrq_key_op sysrq_mountro_op = {
 };
 
 #ifdef CONFIG_LOCKDEP
-static void sysrq_handle_showlocks(int key, struct pt_regs *pt_regs,
-                                struct tty_struct *tty)
+static void sysrq_handle_showlocks(int key, struct tty_struct *tty)
 {
         debug_show_all_locks();
 }
@@ -164,11 +157,11 @@ static struct sysrq_key_op sysrq_showlocks_op = {
 #define sysrq_showlocks_op (*(struct sysrq_key_op *)0)
 #endif
 
-static void sysrq_handle_showregs(int key, struct pt_regs *pt_regs,
-                                  struct tty_struct *tty)
+static void sysrq_handle_showregs(int key, struct tty_struct *tty)
 {
-        if (pt_regs)
-                show_regs(pt_regs);
+        struct pt_regs *regs = get_irq_regs();
+        if (regs)
+                show_regs(regs);
 }
 static struct sysrq_key_op sysrq_showregs_op = {
         .handler        = sysrq_handle_showregs,
@@ -177,8 +170,7 @@ static struct sysrq_key_op sysrq_showregs_op = {
         .enable_mask    = SYSRQ_ENABLE_DUMP,
 };
 
-static void sysrq_handle_showstate(int key, struct pt_regs *pt_regs,
-                                   struct tty_struct *tty)
+static void sysrq_handle_showstate(int key, struct tty_struct *tty)
 {
         show_state();
 }
@@ -189,8 +181,7 @@ static struct sysrq_key_op sysrq_showstate_op = {
         .enable_mask    = SYSRQ_ENABLE_DUMP,
 };
 
-static void sysrq_handle_showmem(int key, struct pt_regs *pt_regs,
-                                 struct tty_struct *tty)
+static void sysrq_handle_showmem(int key, struct tty_struct *tty)
 {
         show_mem();
 }
@@ -215,8 +206,7 @@ static void send_sig_all(int sig)
         }
 }
 
-static void sysrq_handle_term(int key, struct pt_regs *pt_regs,
-                              struct tty_struct *tty)
+static void sysrq_handle_term(int key, struct tty_struct *tty)
 {
         send_sig_all(SIGTERM);
         console_loglevel = 8;
@@ -236,8 +226,7 @@ static void moom_callback(void *ignored)
 
 static DECLARE_WORK(moom_work, moom_callback, NULL);
 
-static void sysrq_handle_moom(int key, struct pt_regs *pt_regs,
-                              struct tty_struct *tty)
+static void sysrq_handle_moom(int key, struct tty_struct *tty)
 {
         schedule_work(&moom_work);
 }
@@ -247,8 +236,7 @@ static struct sysrq_key_op sysrq_moom_op = {
         .action_msg     = "Manual OOM execution",
 };
 
-static void sysrq_handle_kill(int key, struct pt_regs *pt_regs,
-                              struct tty_struct *tty)
+static void sysrq_handle_kill(int key, struct tty_struct *tty)
 {
         send_sig_all(SIGKILL);
         console_loglevel = 8;
@@ -260,8 +248,7 @@ static struct sysrq_key_op sysrq_kill_op = {
         .enable_mask    = SYSRQ_ENABLE_SIGNAL,
 };
 
-static void sysrq_handle_unrt(int key, struct pt_regs *pt_regs,
-                                struct tty_struct *tty)
+static void sysrq_handle_unrt(int key, struct tty_struct *tty)
 {
         normalize_rt_tasks();
 }
@@ -361,8 +348,7 @@ static void __sysrq_put_key_op(int key, struct sysrq_key_op *op_p)
  * This is the non-locking version of handle_sysrq.  It must/can only be called
  * by sysrq key handlers, as they are inside of the lock
  */
-void __handle_sysrq(int key, struct pt_regs *pt_regs, struct tty_struct *tty,
-                        int check_mask)
+void __handle_sysrq(int key, struct tty_struct *tty, int check_mask)
 {
         struct sysrq_key_op *op_p;
         int orig_log_level;
@@ -384,7 +370,7 @@ void __handle_sysrq(int key, struct pt_regs *pt_regs, struct tty_struct *tty,
                     (sysrq_enabled & op_p->enable_mask)) {
                         printk("%s\n", op_p->action_msg);
                         console_loglevel = orig_log_level;
-                        op_p->handler(key, pt_regs, tty);
+                        op_p->handler(key, tty);
                 } else {
                         printk("This sysrq operation is disabled.\n");
                 }
@@ -413,11 +399,11 @@ void __handle_sysrq(int key, struct pt_regs *pt_regs, struct tty_struct *tty,
  * This function is called by the keyboard handler when SysRq is pressed
  * and any other keycode arrives.
  */
-void handle_sysrq(int key, struct pt_regs *pt_regs, struct tty_struct *tty)
+void handle_sysrq(int key, struct tty_struct *tty)
 {
         if (!sysrq_enabled)
                 return;
-        __handle_sysrq(key, pt_regs, tty, 1);
+        __handle_sysrq(key, tty, 1);
 }
 EXPORT_SYMBOL(handle_sysrq);
 
diff --git a/drivers/char/tlclk.c b/drivers/char/tlclk.c
index d2c5ba4e83b8..2444a0e24b31 100644
--- a/drivers/char/tlclk.c
+++ b/drivers/char/tlclk.c
@@ -193,7 +193,7 @@ static DEFINE_SPINLOCK(event_lock);
 
 static int tlclk_major = TLCLK_MAJOR;
 
-static irqreturn_t tlclk_interrupt(int irq, void *dev_id, struct pt_regs *regs);
+static irqreturn_t tlclk_interrupt(int irq, void *dev_id);
 
 static DECLARE_WAIT_QUEUE_HEAD(wq);
 
@@ -856,7 +856,7 @@ static void switchover_timeout(unsigned long data)
         wake_up(&wq);
 }
 
-static irqreturn_t tlclk_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t tlclk_interrupt(int irq, void *dev_id)
 {
         unsigned long flags;
 
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index ee7ac6f43c65..483f3f60013c 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -377,7 +377,7 @@ static struct tpm_vendor_specific tpm_tis = {
                     .fops = &tis_ops,},
 };
 
-static irqreturn_t tis_int_probe(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t tis_int_probe(int irq, void *dev_id)
 {
         struct tpm_chip *chip = (struct tpm_chip *) dev_id;
         u32 interrupt;
@@ -397,7 +397,7 @@ static irqreturn_t tis_int_probe(int irq, void *dev_id, struct pt_regs *regs)
         return IRQ_HANDLED;
 }
 
-static irqreturn_t tis_int_handler(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t tis_int_handler(int irq, void *dev_id)
 {
         struct tpm_chip *chip = (struct tpm_chip *) dev_id;
         u32 interrupt;
diff --git a/drivers/char/vme_scc.c b/drivers/char/vme_scc.c
index c2ca31eb850b..0cdbaa70cf9f 100644
--- a/drivers/char/vme_scc.c
+++ b/drivers/char/vme_scc.c
@@ -81,10 +81,10 @@ static int scc_ioctl(struct tty_struct * tty, struct file * filp,
                      unsigned int cmd, unsigned long arg);
 static void scc_throttle(struct tty_struct *tty);
 static void scc_unthrottle(struct tty_struct *tty);
-static irqreturn_t scc_tx_int(int irq, void *data, struct pt_regs *fp);
-static irqreturn_t scc_rx_int(int irq, void *data, struct pt_regs *fp);
-static irqreturn_t scc_stat_int(int irq, void *data, struct pt_regs *fp);
-static irqreturn_t scc_spcond_int(int irq, void *data, struct pt_regs *fp);
+static irqreturn_t scc_tx_int(int irq, void *data);
+static irqreturn_t scc_rx_int(int irq, void *data);
+static irqreturn_t scc_stat_int(int irq, void *data);
+static irqreturn_t scc_spcond_int(int irq, void *data);
 static void scc_setsignals(struct scc_port *port, int dtr, int rts);
 static void scc_break_ctl(struct tty_struct *tty, int break_state);
 
@@ -419,7 +419,7 @@ module_init(vme_scc_init);
  * Interrupt handlers
  *--------------------------------------------------------------------------*/
 
-static irqreturn_t scc_rx_int(int irq, void *data, struct pt_regs *fp)
+static irqreturn_t scc_rx_int(int irq, void *data)
 {
         unsigned char   ch;
         struct scc_port *port = data;
@@ -440,7 +440,7 @@ static irqreturn_t scc_rx_int(int irq, void *data, struct pt_regs *fp)
          */
         if (SCCread(INT_PENDING_REG) &
             (port->channel == CHANNEL_A ? IPR_A_RX : IPR_B_RX)) {
-                scc_spcond_int (irq, data, fp);
+                scc_spcond_int (irq, data);
                 return IRQ_HANDLED;
         }
 
@@ -451,7 +451,7 @@ static irqreturn_t scc_rx_int(int irq, void *data, struct pt_regs *fp)
 }
 
 
-static irqreturn_t scc_spcond_int(int irq, void *data, struct pt_regs *fp)
+static irqreturn_t scc_spcond_int(int irq, void *data)
 {
         struct scc_port *port = data;
         struct tty_struct *tty = port->gs.tty;
@@ -496,7 +496,7 @@ static irqreturn_t scc_spcond_int(int irq, void *data, struct pt_regs *fp)
 }
 
 
-static irqreturn_t scc_tx_int(int irq, void *data, struct pt_regs *fp)
+static irqreturn_t scc_tx_int(int irq, void *data)
 {
         struct scc_port *port = data;
         SCC_ACCESS_INIT(port);
@@ -538,7 +538,7 @@ static irqreturn_t scc_tx_int(int irq, void *data, struct pt_regs *fp)
 }
 
 
-static irqreturn_t scc_stat_int(int irq, void *data, struct pt_regs *fp)
+static irqreturn_t scc_stat_int(int irq, void *data)
 {
         struct scc_port *port = data;
         unsigned channel = port->channel;
diff --git a/drivers/char/vr41xx_giu.c b/drivers/char/vr41xx_giu.c
index 8116a47b80f4..8e7949305171 100644
--- a/drivers/char/vr41xx_giu.c
+++ b/drivers/char/vr41xx_giu.c
@@ -221,7 +221,7 @@ static struct hw_interrupt_type giuint_high_irq_type = {
         .end            = end_giuint_high_irq,
 };
 
-static int giu_get_irq(unsigned int irq, struct pt_regs *regs)
+static int giu_get_irq(unsigned int irq)
 {
         uint16_t pendl, pendh, maskl, maskh;
         int i;
diff --git a/drivers/char/watchdog/eurotechwdt.c b/drivers/char/watchdog/eurotechwdt.c
index 4f4269754c46..e228d6e173ce 100644
--- a/drivers/char/watchdog/eurotechwdt.c
+++ b/drivers/char/watchdog/eurotechwdt.c
@@ -153,7 +153,7 @@ static void eurwdt_activate_timer(void)
  * Kernel methods.
  */
 
-static irqreturn_t eurwdt_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t eurwdt_interrupt(int irq, void *dev_id)
 {
         printk(KERN_CRIT "timeout WDT timeout\n");
 
diff --git a/drivers/char/watchdog/mpcore_wdt.c b/drivers/char/watchdog/mpcore_wdt.c
index 02d336ace504..3404a9c67f08 100644
--- a/drivers/char/watchdog/mpcore_wdt.c
+++ b/drivers/char/watchdog/mpcore_wdt.c
@@ -64,7 +64,7 @@ MODULE_PARM_DESC(mpcore_noboot, "MPcore watchdog action, set to 1 to ignore rebo
  *      This is the interrupt handler.  Note that we only use this
  *      in testing mode, so don't actually do a reboot here.
  */
-static irqreturn_t mpcore_wdt_fire(int irq, void *arg, struct pt_regs *regs)
+static irqreturn_t mpcore_wdt_fire(int irq, void *arg)
 {
         struct mpcore_wdt *wdt = arg;
 
diff --git a/drivers/char/watchdog/pcwd_usb.c b/drivers/char/watchdog/pcwd_usb.c
index 77662cb0ac46..bda45334d802 100644
--- a/drivers/char/watchdog/pcwd_usb.c
+++ b/drivers/char/watchdog/pcwd_usb.c
@@ -158,7 +158,7 @@ static struct usb_driver usb_pcwd_driver = {
 };
 
 
-static void usb_pcwd_intr_done(struct urb *urb, struct pt_regs *regs)
+static void usb_pcwd_intr_done(struct urb *urb)
 {
         struct usb_pcwd_private *usb_pcwd = (struct usb_pcwd_private *)urb->context;
         unsigned char *data = usb_pcwd->intr_buffer;
diff --git a/drivers/char/watchdog/s3c2410_wdt.c b/drivers/char/watchdog/s3c2410_wdt.c
index b36a04ae9ab8..68b1ca976d53 100644
--- a/drivers/char/watchdog/s3c2410_wdt.c
+++ b/drivers/char/watchdog/s3c2410_wdt.c
@@ -336,8 +336,7 @@ static struct miscdevice s3c2410wdt_miscdev = {
 
 /* interrupt handler code */
 
-static irqreturn_t s3c2410wdt_irq(int irqno, void *param,
-                                  struct pt_regs *regs)
+static irqreturn_t s3c2410wdt_irq(int irqno, void *param)
 {
         printk(KERN_INFO PFX "Watchdog timer expired!\n");
 
diff --git a/drivers/char/watchdog/wdt.c b/drivers/char/watchdog/wdt.c
index 13f23f4a2233..517fbd8643f8 100644
--- a/drivers/char/watchdog/wdt.c
+++ b/drivers/char/watchdog/wdt.c
@@ -225,14 +225,13 @@ static int wdt_get_temperature(int *temperature)
  *      wdt_interrupt:
  *      @irq:           Interrupt number
  *      @dev_id:        Unused as we don't allow multiple devices.
- *      @regs:          Unused.
  *
  *      Handle an interrupt from the board. These are raised when the status
  *      map changes in what the board considers an interesting way. That means
  *      a failure condition occurring.
  */
 
-static irqreturn_t wdt_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t wdt_interrupt(int irq, void *dev_id)
 {
         /*
          *      Read the status register see what is up and
diff --git a/drivers/char/watchdog/wdt285.c b/drivers/char/watchdog/wdt285.c
index 89a249e23fde..e4cf661dc890 100644
--- a/drivers/char/watchdog/wdt285.c
+++ b/drivers/char/watchdog/wdt285.c
@@ -46,7 +46,7 @@ static unsigned long timer_alive;
 /*
  *      If the timer expires..
  */
-static void watchdog_fire(int irq, void *dev_id, struct pt_regs *regs)
+static void watchdog_fire(int irq, void *dev_id)
 {
         printk(KERN_CRIT "Watchdog: Would Reboot.\n");
         *CSR_TIMER4_CNTL = 0;
diff --git a/drivers/char/watchdog/wdt_pci.c b/drivers/char/watchdog/wdt_pci.c
index 74d8cf836e13..ce1261c5cbce 100644
--- a/drivers/char/watchdog/wdt_pci.c
+++ b/drivers/char/watchdog/wdt_pci.c
@@ -270,14 +270,13 @@ static int wdtpci_get_temperature(int *temperature)
  *      wdtpci_interrupt:
  *      @irq:           Interrupt number
  *      @dev_id:        Unused as we don't allow multiple devices.
- *      @regs:          Unused.
  *
  *      Handle an interrupt from the board. These are raised when the status
  *      map changes in what the board considers an interesting way. That means
  *      a failure condition occurring.
  */
 
-static irqreturn_t wdtpci_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t wdtpci_interrupt(int irq, void *dev_id)
 {
         /*
          *      Read the status register see what is up and