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)

54 files changed, 76 insertions, 80 deletions

diff --git a/drivers/isdn/act2000/act2000_isa.c b/drivers/isdn/act2000/act2000_isa.c
index bc98d77..3014495 100644
--- a/drivers/isdn/act2000/act2000_isa.c
+++ b/drivers/isdn/act2000/act2000_isa.c
@@ -63,7 +63,7 @@ act2000_isa_detect(unsigned short portbase)
 }
 
 static irqreturn_t
-act2000_isa_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+act2000_isa_interrupt(int irq, void *dev_id)
 {
         act2000_card *card = irq2card_map[irq];
         u_char istatus;
diff --git a/drivers/isdn/gigaset/bas-gigaset.c b/drivers/isdn/gigaset/bas-gigaset.c
index 5cfbe6a..0c93732 100644
--- a/drivers/isdn/gigaset/bas-gigaset.c
+++ b/drivers/isdn/gigaset/bas-gigaset.c
@@ -454,7 +454,7 @@ inline static int update_basstate(struct bas_cardstate *ucs,
  *	urb	USB request block
  *		urb->context = inbuf structure for controller state
  */
-static void read_ctrl_callback(struct urb *urb, struct pt_regs *regs)
+static void read_ctrl_callback(struct urb *urb)
 {
 	struct inbuf_t *inbuf = urb->context;
 	struct cardstate *cs = inbuf->cs;
@@ -596,7 +596,7 @@ static int atread_submit(struct cardstate *cs, int timeout)
  *	urb	USB request block
  *		urb->context = controller state structure
  */
-static void read_int_callback(struct urb *urb, struct pt_regs *regs)
+static void read_int_callback(struct urb *urb)
 {
 	struct cardstate *cs = urb->context;
 	struct bas_cardstate *ucs = cs->hw.bas;
@@ -762,7 +762,7 @@ resubmit:
  *	urb	USB request block of completed request
  *		urb->context = bc_state structure
  */
-static void read_iso_callback(struct urb *urb, struct pt_regs *regs)
+static void read_iso_callback(struct urb *urb)
 {
 	struct bc_state *bcs;
 	struct bas_bc_state *ubc;
@@ -827,7 +827,7 @@ static void read_iso_callback(struct urb *urb, struct pt_regs *regs)
  *	urb	USB request block of completed request
  *		urb->context = isow_urbctx_t structure
  */
-static void write_iso_callback(struct urb *urb, struct pt_regs *regs)
+static void write_iso_callback(struct urb *urb)
 {
 	struct isow_urbctx_t *ucx;
 	struct bas_bc_state *ubc;
@@ -1415,7 +1415,7 @@ static void req_timeout(unsigned long data)
  *	urb	USB request block of completed request
  *		urb->context = hardware specific controller state structure
  */
-static void write_ctrl_callback(struct urb *urb, struct pt_regs *regs)
+static void write_ctrl_callback(struct urb *urb)
 {
 	struct bas_cardstate *ucs = urb->context;
 	int rc;
@@ -1661,7 +1661,7 @@ static void complete_cb(struct cardstate *cs)
  *	urb	USB request block of completed request
  *		urb->context = controller state structure
  */
-static void write_command_callback(struct urb *urb, struct pt_regs *regs)
+static void write_command_callback(struct urb *urb)
 {
 	struct cardstate *cs = urb->context;
 	struct bas_cardstate *ucs = cs->hw.bas;
diff --git a/drivers/isdn/gigaset/usb-gigaset.c b/drivers/isdn/gigaset/usb-gigaset.c
index 6e05d9d..4ffa9eb 100644
--- a/drivers/isdn/gigaset/usb-gigaset.c
+++ b/drivers/isdn/gigaset/usb-gigaset.c
@@ -362,7 +362,7 @@ static void gigaset_modem_fill(unsigned long data)
  *
  *	It is called if the data was received from the device.
  */
-static void gigaset_read_int_callback(struct urb *urb, struct pt_regs *regs)
+static void gigaset_read_int_callback(struct urb *urb)
 {
 	struct inbuf_t *inbuf = urb->context;
 	struct cardstate *cs = inbuf->cs;
@@ -420,7 +420,7 @@ static void gigaset_read_int_callback(struct urb *urb, struct pt_regs *regs)
 
 
 /* This callback routine is called when data was transmitted to the device. */
-static void gigaset_write_bulk_callback(struct urb *urb, struct pt_regs *regs)
+static void gigaset_write_bulk_callback(struct urb *urb)
 {
 	struct cardstate *cs = urb->context;
 	unsigned long flags;
diff --git a/drivers/isdn/hardware/avm/avmcard.h b/drivers/isdn/hardware/avm/avmcard.h
index 3b43172..d964f07 100644
--- a/drivers/isdn/hardware/avm/avmcard.h
+++ b/drivers/isdn/hardware/avm/avmcard.h
@@ -554,7 +554,7 @@ void b1_register_appl(struct capi_ctr *ctrl, u16 appl,
 void b1_release_appl(struct capi_ctr *ctrl, u16 appl);
 u16  b1_send_message(struct capi_ctr *ctrl, struct sk_buff *skb);
 void b1_parse_version(avmctrl_info *card);
-irqreturn_t b1_interrupt(int interrupt, void *devptr, struct pt_regs *regs);
+irqreturn_t b1_interrupt(int interrupt, void *devptr);
 
 int b1ctl_read_proc(char *page, char **start, off_t off,
         		int count, int *eof, struct capi_ctr *ctrl);
@@ -567,7 +567,7 @@ void avmcard_dma_free(avmcard_dmainfo *);
 int b1pciv4_detect(avmcard *card);
 int t1pci_detect(avmcard *card);
 void b1dma_reset(avmcard *card);
-irqreturn_t b1dma_interrupt(int interrupt, void *devptr, struct pt_regs *regs);
+irqreturn_t b1dma_interrupt(int interrupt, void *devptr);
 
 int b1dma_load_firmware(struct capi_ctr *ctrl, capiloaddata *data);
 void b1dma_reset_ctr(struct capi_ctr *ctrl);
diff --git a/drivers/isdn/hardware/avm/b1.c b/drivers/isdn/hardware/avm/b1.c
index 0c7061d..da27292 100644
--- a/drivers/isdn/hardware/avm/b1.c
+++ b/drivers/isdn/hardware/avm/b1.c
@@ -485,7 +485,7 @@ void b1_parse_version(avmctrl_info *cinfo)
 
 /* ------------------------------------------------------------- */
 
-irqreturn_t b1_interrupt(int interrupt, void *devptr, struct pt_regs *regs)
+irqreturn_t b1_interrupt(int interrupt, void *devptr)
 {
 	avmcard *card = devptr;
 	avmctrl_info *cinfo = &card->ctrlinfo[0];
diff --git a/drivers/isdn/hardware/avm/b1dma.c b/drivers/isdn/hardware/avm/b1dma.c
index a4beeb4..ddd47cd 100644
--- a/drivers/isdn/hardware/avm/b1dma.c
+++ b/drivers/isdn/hardware/avm/b1dma.c
@@ -628,7 +628,7 @@ static void b1dma_handle_interrupt(avmcard *card)
 	spin_unlock(&card->lock);
 }
 
-irqreturn_t b1dma_interrupt(int interrupt, void *devptr, struct pt_regs *regs)
+irqreturn_t b1dma_interrupt(int interrupt, void *devptr)
 {
 	avmcard *card = devptr;
 
diff --git a/drivers/isdn/hardware/avm/c4.c b/drivers/isdn/hardware/avm/c4.c
index 6c3d5f5..2a3eb38 100644
--- a/drivers/isdn/hardware/avm/c4.c
+++ b/drivers/isdn/hardware/avm/c4.c
@@ -713,7 +713,7 @@ static irqreturn_t c4_handle_interrupt(avmcard *card)
 	return IRQ_HANDLED;
 }
 
-static irqreturn_t c4_interrupt(int interrupt, void *devptr, struct pt_regs *regs)
+static irqreturn_t c4_interrupt(int interrupt, void *devptr)
 {
 	avmcard *card = devptr;
 
diff --git a/drivers/isdn/hardware/avm/t1isa.c b/drivers/isdn/hardware/avm/t1isa.c
index 5a2f854..e47c60b 100644
--- a/drivers/isdn/hardware/avm/t1isa.c
+++ b/drivers/isdn/hardware/avm/t1isa.c
@@ -131,7 +131,7 @@ static int t1_detectandinit(unsigned int base, unsigned irq, int cardnr)
         return 0;
 }
 
-static irqreturn_t t1isa_interrupt(int interrupt, void *devptr, struct pt_regs *regs)
+static irqreturn_t t1isa_interrupt(int interrupt, void *devptr)
 {
 	avmcard *card = devptr;
 	avmctrl_info *cinfo = &card->ctrlinfo[0];
diff --git a/drivers/isdn/hardware/eicon/diva.c b/drivers/isdn/hardware/eicon/diva.c
index 8ab8027..ffa2afa 100644
--- a/drivers/isdn/hardware/eicon/diva.c
+++ b/drivers/isdn/hardware/eicon/diva.c
@@ -71,8 +71,6 @@ DivaIdiReqFunc(29)
 DivaIdiReqFunc(30)
 DivaIdiReqFunc(31)
 
-struct pt_regs;
-
 /*
 **  LOCALS
 */
@@ -515,7 +513,7 @@ diva_xdi_read(void *adapter, void *os_handle, void __user *dst,
 }
 
 
-irqreturn_t diva_os_irq_wrapper(int irq, void *context, struct pt_regs *regs)
+irqreturn_t diva_os_irq_wrapper(int irq, void *context)
 {
 	diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) context;
 	diva_xdi_clear_interrupts_proc_t clear_int_proc;
diff --git a/drivers/isdn/hardware/eicon/divasmain.c b/drivers/isdn/hardware/eicon/divasmain.c
index b7dadba..dae2e83 100644
--- a/drivers/isdn/hardware/eicon/divasmain.c
+++ b/drivers/isdn/hardware/eicon/divasmain.c
@@ -58,8 +58,7 @@ static char *DRIVERLNAME = "divas";
 static char *DEVNAME = "Divas";
 char *DRIVERRELEASE_DIVAS = "2.0";
 
-extern irqreturn_t diva_os_irq_wrapper(int irq, void *context,
-				struct pt_regs *regs);
+extern irqreturn_t diva_os_irq_wrapper(int irq, void *context);
 extern int create_divas_proc(void);
 extern void remove_divas_proc(void);
 extern void diva_get_vserial_number(PISDN_ADAPTER IoAdapter, char *buf);
diff --git a/drivers/isdn/hisax/amd7930_fn.c b/drivers/isdn/hisax/amd7930_fn.c
index 8ae08c4..bec5901 100644
--- a/drivers/isdn/hisax/amd7930_fn.c
+++ b/drivers/isdn/hisax/amd7930_fn.c
@@ -733,7 +733,7 @@ dbusy_timer_handler(struct IsdnCardState *cs)
 			wByteAMD(cs, 0x21, 0x82);
 			wByteAMD(cs, 0x21, 0x02);
 			spin_unlock_irqrestore(&cs->lock, flags);
-			cs->irq_func(cs->irq, cs, NULL);
+			cs->irq_func(cs->irq, cs);
 
                         if (cs->debug & L1_DEB_ISAC)
 				debugl1(cs, "Amd7930: dbusy_timer_handler: Transmitter reset");
diff --git a/drivers/isdn/hisax/asuscom.c b/drivers/isdn/hisax/asuscom.c
index 93ff941..61e69e9 100644
--- a/drivers/isdn/hisax/asuscom.c
+++ b/drivers/isdn/hisax/asuscom.c
@@ -156,7 +156,7 @@ WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
 #include "hscx_irq.c"
 
 static irqreturn_t
-asuscom_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+asuscom_interrupt(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_char val;
@@ -194,7 +194,7 @@ asuscom_interrupt(int intno, void *dev_id, struct pt_regs *regs)
 }
 
 static irqreturn_t
-asuscom_interrupt_ipac(int intno, void *dev_id, struct pt_regs *regs)
+asuscom_interrupt_ipac(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_char ista, val, icnt = 5;
diff --git a/drivers/isdn/hisax/avm_a1.c b/drivers/isdn/hisax/avm_a1.c
index 729e906..d9028e9 100644
--- a/drivers/isdn/hisax/avm_a1.c
+++ b/drivers/isdn/hisax/avm_a1.c
@@ -101,7 +101,7 @@ WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
 #include "hscx_irq.c"
 
 static irqreturn_t
-avm_a1_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+avm_a1_interrupt(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_char val, sval;
diff --git a/drivers/isdn/hisax/avm_a1p.c b/drivers/isdn/hisax/avm_a1p.c
index 574e252..c87fa3f 100644
--- a/drivers/isdn/hisax/avm_a1p.c
+++ b/drivers/isdn/hisax/avm_a1p.c
@@ -140,7 +140,7 @@ WriteHSCXfifo(struct IsdnCardState *cs, int hscx, u_char * data, int size)
 #include "hscx_irq.c"
 
 static irqreturn_t
-avm_a1p_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+avm_a1p_interrupt(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_char val, sval;
diff --git a/drivers/isdn/hisax/avm_pci.c b/drivers/isdn/hisax/avm_pci.c
index 369afd3..b04a178 100644
--- a/drivers/isdn/hisax/avm_pci.c
+++ b/drivers/isdn/hisax/avm_pci.c
@@ -651,7 +651,7 @@ inithdlc(struct IsdnCardState *cs)
 }
 
 static irqreturn_t
-avm_pcipnp_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+avm_pcipnp_interrupt(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_long flags;
diff --git a/drivers/isdn/hisax/bkm_a4t.c b/drivers/isdn/hisax/bkm_a4t.c
index 87a6301..871310d 100644
--- a/drivers/isdn/hisax/bkm_a4t.c
+++ b/drivers/isdn/hisax/bkm_a4t.c
@@ -125,7 +125,7 @@ WriteJADE(struct IsdnCardState *cs, int jade, u_char offset, u_char value)
 #include "jade_irq.c"
 
 static irqreturn_t
-bkm_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+bkm_interrupt(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_char val = 0;
diff --git a/drivers/isdn/hisax/bkm_a8.c b/drivers/isdn/hisax/bkm_a8.c
index dae090a..3403106 100644
--- a/drivers/isdn/hisax/bkm_a8.c
+++ b/drivers/isdn/hisax/bkm_a8.c
@@ -140,7 +140,7 @@ set_ipac_active(struct IsdnCardState *cs, u_int active)
 #include "hscx_irq.c"
 
 static irqreturn_t
-bkm_interrupt_ipac(int intno, void *dev_id, struct pt_regs *regs)
+bkm_interrupt_ipac(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_char ista, val, icnt = 5;
diff --git a/drivers/isdn/hisax/diva.c b/drivers/isdn/hisax/diva.c
index e294fa3..7e95f04 100644
--- a/drivers/isdn/hisax/diva.c
+++ b/drivers/isdn/hisax/diva.c
@@ -289,7 +289,7 @@ MemWriteHSCX_IPACX(struct IsdnCardState *cs, int hscx, u_char offset, u_char val
 #include "hscx_irq.c"
 
 static irqreturn_t
-diva_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+diva_interrupt(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_char val, sval;
@@ -319,7 +319,7 @@ diva_interrupt(int intno, void *dev_id, struct pt_regs *regs)
 }
 
 static irqreturn_t
-diva_irq_ipac_isa(int intno, void *dev_id, struct pt_regs *regs)
+diva_irq_ipac_isa(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_char ista,val;
@@ -630,7 +630,7 @@ Memhscx_int_main(struct IsdnCardState *cs, u_char val)
 }
 
 static irqreturn_t
-diva_irq_ipac_pci(int intno, void *dev_id, struct pt_regs *regs)
+diva_irq_ipac_pci(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_char ista,val;
@@ -685,7 +685,7 @@ Start_IPACPCI:
 }
 
 static irqreturn_t
-diva_irq_ipacx_pci(int intno, void *dev_id, struct pt_regs *regs)
+diva_irq_ipacx_pci(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_char val;
diff --git a/drivers/isdn/hisax/elsa.c b/drivers/isdn/hisax/elsa.c
index 3b3e318..fab3e4e 100644
--- a/drivers/isdn/hisax/elsa.c
+++ b/drivers/isdn/hisax/elsa.c
@@ -282,7 +282,7 @@ TimerRun(struct IsdnCardState *cs)
 #include "hscx_irq.c"
 
 static irqreturn_t
-elsa_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+elsa_interrupt(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_long flags;
@@ -361,7 +361,7 @@ elsa_interrupt(int intno, void *dev_id, struct pt_regs *regs)
 }
 
 static irqreturn_t
-elsa_interrupt_ipac(int intno, void *dev_id, struct pt_regs *regs)
+elsa_interrupt_ipac(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_long flags;
diff --git a/drivers/isdn/hisax/enternow_pci.c b/drivers/isdn/hisax/enternow_pci.c
index 76c7d29..b45de9d 100644
--- a/drivers/isdn/hisax/enternow_pci.c
+++ b/drivers/isdn/hisax/enternow_pci.c
@@ -240,7 +240,7 @@ enpci_card_msg(struct IsdnCardState *cs, int mt, void *arg)
 }
 
 static irqreturn_t
-enpci_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+enpci_interrupt(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	unsigned char s0val, s1val, ir;
diff --git a/drivers/isdn/hisax/gazel.c b/drivers/isdn/hisax/gazel.c
index fe29372..3efa719 100644
--- a/drivers/isdn/hisax/gazel.c
+++ b/drivers/isdn/hisax/gazel.c
@@ -243,7 +243,7 @@ WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
 #include "hscx_irq.c"
 
 static irqreturn_t
-gazel_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+gazel_interrupt(int intno, void *dev_id)
 {
 #define MAXCOUNT 5
 	struct IsdnCardState *cs = dev_id;
@@ -274,7 +274,7 @@ gazel_interrupt(int intno, void *dev_id, struct pt_regs *regs)
 
 
 static irqreturn_t
-gazel_interrupt_ipac(int intno, void *dev_id, struct pt_regs *regs)
+gazel_interrupt_ipac(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_char ista, val;
diff --git a/drivers/isdn/hisax/hfc4s8s_l1.c b/drivers/isdn/hisax/hfc4s8s_l1.c
index 0ca5e66..d852c9d 100644
--- a/drivers/isdn/hisax/hfc4s8s_l1.c
+++ b/drivers/isdn/hisax/hfc4s8s_l1.c
@@ -1268,7 +1268,7 @@ hfc4s8s_bh(hfc4s8s_hw * hw)
 /* interrupt handler */
 /*********************/
 static irqreturn_t
-hfc4s8s_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+hfc4s8s_interrupt(int intno, void *dev_id)
 {
 	hfc4s8s_hw *hw = dev_id;
 	u_char b, ovr;
diff --git a/drivers/isdn/hisax/hfc_pci.c b/drivers/isdn/hisax/hfc_pci.c
index 1df60ca..93f60b5 100644
--- a/drivers/isdn/hisax/hfc_pci.c
+++ b/drivers/isdn/hisax/hfc_pci.c
@@ -931,7 +931,7 @@ receive_emsg(struct IsdnCardState *cs)
 /* Interrupt handler */
 /*********************/
 static irqreturn_t
-hfcpci_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+hfcpci_interrupt(int intno, void *dev_id)
 {
 	u_long flags;
 	struct IsdnCardState *cs = dev_id;
diff --git a/drivers/isdn/hisax/hfc_sx.c b/drivers/isdn/hisax/hfc_sx.c
index b7e8e23..954d153 100644
--- a/drivers/isdn/hisax/hfc_sx.c
+++ b/drivers/isdn/hisax/hfc_sx.c
@@ -691,7 +691,7 @@ receive_emsg(struct IsdnCardState *cs)
 /* Interrupt handler */
 /*********************/
 static irqreturn_t
-hfcsx_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+hfcsx_interrupt(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_char exval;
diff --git a/drivers/isdn/hisax/hfc_usb.c b/drivers/isdn/hisax/hfc_usb.c
index 6b88ecb..7105b04 100644
--- a/drivers/isdn/hisax/hfc_usb.c
+++ b/drivers/isdn/hisax/hfc_usb.c
@@ -276,7 +276,7 @@ control_action_handler(hfcusb_data * hfc, int reg, int val, int action)
 /* control completion routine handling background control cmds */
 /***************************************************************/
 static void
-ctrl_complete(struct urb *urb, struct pt_regs *regs)
+ctrl_complete(struct urb *urb)
 {
 	hfcusb_data *hfc = (hfcusb_data *) urb->context;
 	ctrl_buft *buf;
@@ -603,7 +603,7 @@ static int iso_packets[8] =
 /* transmit completion routine for all ISO tx fifos */
 /*****************************************************/
 static void
-tx_iso_complete(struct urb *urb, struct pt_regs *regs)
+tx_iso_complete(struct urb *urb)
 {
 	iso_urb_struct *context_iso_urb = (iso_urb_struct *) urb->context;
 	usb_fifo *fifo = context_iso_urb->owner_fifo;
@@ -726,7 +726,7 @@ tx_iso_complete(struct urb *urb, struct pt_regs *regs)
 /* receive completion routine for all ISO tx fifos   */
 /*****************************************************/
 static void
-rx_iso_complete(struct urb *urb, struct pt_regs *regs)
+rx_iso_complete(struct urb *urb)
 {
 	iso_urb_struct *context_iso_urb = (iso_urb_struct *) urb->context;
 	usb_fifo *fifo = context_iso_urb->owner_fifo;
@@ -919,7 +919,7 @@ collect_rx_frame(usb_fifo * fifo, __u8 * data, int len, int finish)
 /* receive completion routine for all rx fifos */
 /***********************************************/
 static void
-rx_complete(struct urb *urb, struct pt_regs *regs)
+rx_complete(struct urb *urb)
 {
 	int len;
 	int status;
diff --git a/drivers/isdn/hisax/hfcscard.c b/drivers/isdn/hisax/hfcscard.c
index 4e7f472..57670dc 100644
--- a/drivers/isdn/hisax/hfcscard.c
+++ b/drivers/isdn/hisax/hfcscard.c
@@ -21,7 +21,7 @@ extern const char *CardType[];
 static const char *hfcs_revision = "$Revision: 1.10.2.4 $";
 
 static irqreturn_t
-hfcs_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+hfcs_interrupt(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_char val, stat;
diff --git a/drivers/isdn/hisax/hisax.h b/drivers/isdn/hisax/hisax.h
index 2f9d511..159c589 100644
--- a/drivers/isdn/hisax/hisax.h
+++ b/drivers/isdn/hisax/hisax.h
@@ -941,7 +941,7 @@ struct IsdnCardState {
 	int		(*cardmsg) (struct IsdnCardState *, int, void *);
 	void		(*setstack_d) (struct PStack *, struct IsdnCardState *);
 	void		(*DC_Close) (struct IsdnCardState *);
-	int		(*irq_func) (int, void *, struct pt_regs *);
+	int		(*irq_func) (int, void *);
 	int		(*auxcmd) (struct IsdnCardState *, isdn_ctrl *);
 	struct Channel	channel[2+MAX_WAITING_CALLS];
 	struct BCState	bcs[2+MAX_WAITING_CALLS];
diff --git a/drivers/isdn/hisax/hisax_fcpcipnp.c b/drivers/isdn/hisax/hisax_fcpcipnp.c
index 881a416..f6db55a 100644
--- a/drivers/isdn/hisax/hisax_fcpcipnp.c
+++ b/drivers/isdn/hisax/hisax_fcpcipnp.c
@@ -651,7 +651,7 @@ static void fritz_b_l2l1(struct hisax_if *ifc, int pr, void *arg)
 // ----------------------------------------------------------------------
 
 static irqreturn_t
-fcpci2_irq(int intno, void *dev, struct pt_regs *regs)
+fcpci2_irq(int intno, void *dev)
 {
 	struct fritz_adapter *adapter = dev;
 	unsigned char val;
@@ -671,7 +671,7 @@ fcpci2_irq(int intno, void *dev, struct pt_regs *regs)
 }
 
 static irqreturn_t
-fcpci_irq(int intno, void *dev, struct pt_regs *regs)
+fcpci_irq(int intno, void *dev)
 {
 	struct fritz_adapter *adapter = dev;
 	unsigned char sval;
diff --git a/drivers/isdn/hisax/icc.c b/drivers/isdn/hisax/icc.c
index 2cf7b66..da70692 100644
--- a/drivers/isdn/hisax/icc.c
+++ b/drivers/isdn/hisax/icc.c
@@ -608,7 +608,7 @@ dbusy_timer_handler(struct IsdnCardState *cs)
 				debugl1(cs, "D-Channel Busy no skb");
 			}
 			cs->writeisac(cs, ICC_CMDR, 0x01); /* Transmitter reset */
-			cs->irq_func(cs->irq, cs, NULL);
+			cs->irq_func(cs->irq, cs);
 		}
 	}
 }
diff --git a/drivers/isdn/hisax/isac.c b/drivers/isdn/hisax/isac.c
index 565b789..282f349 100644
--- a/drivers/isdn/hisax/isac.c
+++ b/drivers/isdn/hisax/isac.c
@@ -609,7 +609,7 @@ dbusy_timer_handler(struct IsdnCardState *cs)
 				debugl1(cs, "D-Channel Busy no skb");
 			}
 			cs->writeisac(cs, ISAC_CMDR, 0x01); /* Transmitter reset */
-			cs->irq_func(cs->irq, cs, NULL);
+			cs->irq_func(cs->irq, cs);
 		}
 	}
 }
diff --git a/drivers/isdn/hisax/isurf.c b/drivers/isdn/hisax/isurf.c
index 715a1a8..55de069 100644
--- a/drivers/isdn/hisax/isurf.c
+++ b/drivers/isdn/hisax/isurf.c
@@ -83,7 +83,7 @@ WriteISAR(struct IsdnCardState *cs, int mode, u_char offset, u_char value)
 }
 
 static irqreturn_t
-isurf_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+isurf_interrupt(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_char val;
diff --git a/drivers/isdn/hisax/ix1_micro.c b/drivers/isdn/hisax/ix1_micro.c
index 3971750..252d79d 100644
--- a/drivers/isdn/hisax/ix1_micro.c
+++ b/drivers/isdn/hisax/ix1_micro.c
@@ -125,7 +125,7 @@ WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
 #include "hscx_irq.c"
 
 static irqreturn_t
-ix1micro_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+ix1micro_interrupt(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_char val;
diff --git a/drivers/isdn/hisax/mic.c b/drivers/isdn/hisax/mic.c
index 8c82519..a81d175 100644
--- a/drivers/isdn/hisax/mic.c
+++ b/drivers/isdn/hisax/mic.c
@@ -120,7 +120,7 @@ WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
 #include "hscx_irq.c"
 
 static irqreturn_t
-mic_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+mic_interrupt(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_char val;
diff --git a/drivers/isdn/hisax/netjet.h b/drivers/isdn/hisax/netjet.h
index 1080508..4d89d3e 100644
--- a/drivers/isdn/hisax/netjet.h
+++ b/drivers/isdn/hisax/netjet.h
@@ -66,7 +66,7 @@ void read_tiger(struct IsdnCardState *cs);
 void write_tiger(struct IsdnCardState *cs);
 
 void netjet_fill_dma(struct BCState *bcs);
-void netjet_interrupt(int intno, void *dev_id, struct pt_regs *regs);
+void netjet_interrupt(int intno, void *dev_id);
 void inittiger(struct IsdnCardState *cs);
 void release_io_netjet(struct IsdnCardState *cs);
 
diff --git a/drivers/isdn/hisax/niccy.c b/drivers/isdn/hisax/niccy.c
index 0945336..e5918c6 100644
--- a/drivers/isdn/hisax/niccy.c
+++ b/drivers/isdn/hisax/niccy.c
@@ -122,8 +122,7 @@ static void WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset,
 
 #include "hscx_irq.c"
 
-static irqreturn_t niccy_interrupt(int intno, void *dev_id,
-		struct pt_regs *regs)
+static irqreturn_t niccy_interrupt(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_char val;
diff --git a/drivers/isdn/hisax/nj_s.c b/drivers/isdn/hisax/nj_s.c
index 80025fd..c09ffb1 100644
--- a/drivers/isdn/hisax/nj_s.c
+++ b/drivers/isdn/hisax/nj_s.c
@@ -26,7 +26,7 @@ static void dummywr(struct IsdnCardState *cs, int chan, u_char off, u_char value
 }
 
 static irqreturn_t
-netjet_s_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+netjet_s_interrupt(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_char val, s1val, s0val;
diff --git a/drivers/isdn/hisax/nj_u.c b/drivers/isdn/hisax/nj_u.c
index 3749716..8202cf3 100644
--- a/drivers/isdn/hisax/nj_u.c
+++ b/drivers/isdn/hisax/nj_u.c
@@ -26,7 +26,7 @@ static void dummywr(struct IsdnCardState *cs, int chan, u_char off, u_char value
 }
 
 static irqreturn_t
-netjet_u_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+netjet_u_interrupt(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_char val, sval;
diff --git a/drivers/isdn/hisax/s0box.c b/drivers/isdn/hisax/s0box.c
index e76042d..150ef68 100644
--- a/drivers/isdn/hisax/s0box.c
+++ b/drivers/isdn/hisax/s0box.c
@@ -141,7 +141,7 @@ WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
 #include "hscx_irq.c"
 
 static irqreturn_t
-s0box_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+s0box_interrupt(int intno, void *dev_id)
 {
 #define MAXCOUNT 5
 	struct IsdnCardState *cs = dev_id;
diff --git a/drivers/isdn/hisax/saphir.c b/drivers/isdn/hisax/saphir.c
index d943d36..c99b166 100644
--- a/drivers/isdn/hisax/saphir.c
+++ b/drivers/isdn/hisax/saphir.c
@@ -117,7 +117,7 @@ WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
 #include "hscx_irq.c"
 
 static irqreturn_t
-saphir_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+saphir_interrupt(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_char val;
diff --git a/drivers/isdn/hisax/sedlbauer.c b/drivers/isdn/hisax/sedlbauer.c
index 8d8e8a2..9522141 100644
--- a/drivers/isdn/hisax/sedlbauer.c
+++ b/drivers/isdn/hisax/sedlbauer.c
@@ -260,7 +260,7 @@ WriteISAR(struct IsdnCardState *cs, int mode, u_char offset, u_char value)
 #include "hscx_irq.c"
 
 static irqreturn_t
-sedlbauer_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+sedlbauer_interrupt(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_char val;
@@ -306,7 +306,7 @@ sedlbauer_interrupt(int intno, void *dev_id, struct pt_regs *regs)
 }
 
 static irqreturn_t
-sedlbauer_interrupt_ipac(int intno, void *dev_id, struct pt_regs *regs)
+sedlbauer_interrupt_ipac(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_char ista, val, icnt = 5;
@@ -353,7 +353,7 @@ Start_IPAC:
 }
 
 static irqreturn_t
-sedlbauer_interrupt_isar(int intno, void *dev_id, struct pt_regs *regs)
+sedlbauer_interrupt_isar(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_char val;
diff --git a/drivers/isdn/hisax/sportster.c b/drivers/isdn/hisax/sportster.c
index a49b694..0220950 100644
--- a/drivers/isdn/hisax/sportster.c
+++ b/drivers/isdn/hisax/sportster.c
@@ -99,7 +99,7 @@ WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
 #include "hscx_irq.c"
 
 static irqreturn_t
-sportster_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+sportster_interrupt(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_char val;
diff --git a/drivers/isdn/hisax/st5481_b.c b/drivers/isdn/hisax/st5481_b.c
index aca2a39..75d0f248 100644
--- a/drivers/isdn/hisax/st5481_b.c
+++ b/drivers/isdn/hisax/st5481_b.c
@@ -161,7 +161,7 @@ static void led_blink(struct st5481_adapter *adapter)
 	st5481_usb_device_ctrl_msg(adapter, GPIO_OUT, leds, NULL, NULL);
 }
 
-static void usb_b_out_complete(struct urb *urb, struct pt_regs *regs)
+static void usb_b_out_complete(struct urb *urb)
 {
 	struct st5481_bcs *bcs = urb->context;
 	struct st5481_b_out *b_out = &bcs->b_out;
diff --git a/drivers/isdn/hisax/st5481_d.c b/drivers/isdn/hisax/st5481_d.c
index 98adec4..1d8c261 100644
--- a/drivers/isdn/hisax/st5481_d.c
+++ b/drivers/isdn/hisax/st5481_d.c
@@ -370,7 +370,7 @@ static void fifo_reseted(void *context)
 	FsmEvent(&adapter->d_out.fsm, EV_DOUT_RESETED, NULL);
 }
 
-static void usb_d_out_complete(struct urb *urb, struct pt_regs *regs)
+static void usb_d_out_complete(struct urb *urb)
 {
 	struct st5481_adapter *adapter = urb->context;
 	struct st5481_d_out *d_out = &adapter->d_out;
diff --git a/drivers/isdn/hisax/st5481_usb.c b/drivers/isdn/hisax/st5481_usb.c
index b096b64..ff15951 100644
--- a/drivers/isdn/hisax/st5481_usb.c
+++ b/drivers/isdn/hisax/st5481_usb.c
@@ -125,7 +125,7 @@ void st5481_ph_command(struct st5481_adapter *adapter, unsigned int command)
  * Call the user provided completion routine and try
  * to send the next request.
  */
-static void usb_ctrl_complete(struct urb *urb, struct pt_regs *regs)
+static void usb_ctrl_complete(struct urb *urb)
 {
 	struct st5481_adapter *adapter = urb->context;
 	struct st5481_ctrl *ctrl = &adapter->ctrl;
@@ -179,7 +179,7 @@ static void usb_ctrl_complete(struct urb *urb, struct pt_regs *regs)
  * Decode the register values and schedule a private event.
  * Called at interrupt.
  */
-static void usb_int_complete(struct urb *urb, struct pt_regs *regs)
+static void usb_int_complete(struct urb *urb)
 {
 	u8 *data = urb->transfer_buffer;
 	u8 irqbyte;
@@ -483,7 +483,7 @@ void st5481_release_isocpipes(struct urb* urb[2])
  * called 50 times per second with 20 ISOC descriptors. 
  * Called at interrupt.
  */
-static void usb_in_complete(struct urb *urb, struct pt_regs *regs)
+static void usb_in_complete(struct urb *urb)
 {
 	struct st5481_in *in = urb->context;
 	unsigned char *ptr;
diff --git a/drivers/isdn/hisax/teleint.c b/drivers/isdn/hisax/teleint.c
index e94dc6f..0909662 100644
--- a/drivers/isdn/hisax/teleint.c
+++ b/drivers/isdn/hisax/teleint.c
@@ -157,7 +157,7 @@ WriteHFC(struct IsdnCardState *cs, int data, u_char reg, u_char value)
 }
 
 static irqreturn_t
-TeleInt_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+TeleInt_interrupt(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_char val;
diff --git a/drivers/isdn/hisax/teles0.c b/drivers/isdn/hisax/teles0.c
index f94af09..4858133 100644
--- a/drivers/isdn/hisax/teles0.c
+++ b/drivers/isdn/hisax/teles0.c
@@ -144,7 +144,7 @@ WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
 #include "hscx_irq.c"
 
 static irqreturn_t
-teles0_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+teles0_interrupt(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_char val;
diff --git a/drivers/isdn/hisax/teles3.c b/drivers/isdn/hisax/teles3.c
index 5cb7124..6a5e379 100644
--- a/drivers/isdn/hisax/teles3.c
+++ b/drivers/isdn/hisax/teles3.c
@@ -101,7 +101,7 @@ WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
 #include "hscx_irq.c"
 
 static irqreturn_t
-teles3_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+teles3_interrupt(int intno, void *dev_id)
 {
 #define MAXCOUNT 5
 	struct IsdnCardState *cs = dev_id;
diff --git a/drivers/isdn/hisax/telespci.c b/drivers/isdn/hisax/telespci.c
index dca4468..d09f6d0 100644
--- a/drivers/isdn/hisax/telespci.c
+++ b/drivers/isdn/hisax/telespci.c
@@ -226,7 +226,7 @@ WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
 #include "hscx_irq.c"
 
 static irqreturn_t
-telespci_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+telespci_interrupt(int intno, void *dev_id)
 {
 	struct IsdnCardState *cs = dev_id;
 	u_char hval, ival;
diff --git a/drivers/isdn/hisax/w6692.c b/drivers/isdn/hisax/w6692.c
index 0595293..1655341 100644
--- a/drivers/isdn/hisax/w6692.c
+++ b/drivers/isdn/hisax/w6692.c
@@ -400,7 +400,7 @@ W6692B_interrupt(struct IsdnCardState *cs, u_char bchan)
 }
 
 static irqreturn_t
-W6692_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+W6692_interrupt(int intno, void *dev_id)
 {
 	struct IsdnCardState	*cs = dev_id;
 	u_char			val, exval, v1;
@@ -715,7 +715,7 @@ dbusy_timer_handler(struct IsdnCardState *cs)
 			}
 			cs->writeW6692(cs, W_D_CMDR, W_D_CMDR_XRST);	/* Transmitter reset */
 			spin_unlock_irqrestore(&cs->lock, flags);
-			cs->irq_func(cs->irq, cs, NULL);
+			cs->irq_func(cs->irq, cs);
 			return;
 		}
 	}
diff --git a/drivers/isdn/hysdn/boardergo.c b/drivers/isdn/hysdn/boardergo.c
index 73afebd..160f22f 100644
--- a/drivers/isdn/hysdn/boardergo.c
+++ b/drivers/isdn/hysdn/boardergo.c
@@ -33,7 +33,7 @@
 /* The cards interrupt handler. Called from system */
 /***************************************************/
 static irqreturn_t
-ergo_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+ergo_interrupt(int intno, void *dev_id)
 {
 	hysdn_card *card = dev_id;	/* parameter from irq */
 	tErgDpram *dpr;
diff --git a/drivers/isdn/pcbit/layer2.c b/drivers/isdn/pcbit/layer2.c
index ba76693..13e7d21 100644
--- a/drivers/isdn/pcbit/layer2.c
+++ b/drivers/isdn/pcbit/layer2.c
@@ -512,7 +512,7 @@ pcbit_firmware_bug(struct pcbit_dev *dev)
 }
 
 irqreturn_t
-pcbit_irq_handler(int interrupt, void *devptr, struct pt_regs *regs)
+pcbit_irq_handler(int interrupt, void *devptr)
 {
 	struct pcbit_dev *dev;
 	u_char info,
diff --git a/drivers/isdn/pcbit/layer2.h b/drivers/isdn/pcbit/layer2.h
index 0d99da3..2ac295e 100644
--- a/drivers/isdn/pcbit/layer2.h
+++ b/drivers/isdn/pcbit/layer2.h
@@ -124,7 +124,7 @@ struct frame_buf {
 extern int pcbit_l2_write(struct pcbit_dev * dev, ulong msg, ushort refnum, 
                           struct sk_buff *skb, unsigned short hdr_len);
 
-extern irqreturn_t pcbit_irq_handler(int interrupt, void *, struct pt_regs *regs);
+extern irqreturn_t pcbit_irq_handler(int interrupt, void *);
 
 extern struct pcbit_dev * dev_pcbit[MAX_PCBIT_CARDS];
 
diff --git a/drivers/isdn/sc/init.c b/drivers/isdn/sc/init.c
index a627e68..222ca7c 100644
--- a/drivers/isdn/sc/init.c
+++ b/drivers/isdn/sc/init.c
@@ -35,7 +35,7 @@ module_param_array(irq, int, NULL, 0);
 module_param_array(ram, int, NULL, 0);
 module_param(do_reset, bool, 0);
 
-extern irqreturn_t interrupt_handler(int, void *, struct pt_regs *);
+extern irqreturn_t interrupt_handler(int, void *);
 extern int sndpkt(int, int, int, struct sk_buff *);
 extern int command(isdn_ctrl *);
 extern int indicate_status(int, int, ulong, char*);
diff --git a/drivers/isdn/sc/interrupt.c b/drivers/isdn/sc/interrupt.c
index ae62631..cd17de1 100644
--- a/drivers/isdn/sc/interrupt.c
+++ b/drivers/isdn/sc/interrupt.c
@@ -45,7 +45,7 @@ static int get_card_from_irq(int irq)
 /*
  * 
  */
-irqreturn_t interrupt_handler(int interrupt, void *cardptr, struct pt_regs *regs)
+irqreturn_t interrupt_handler(int interrupt, void *cardptr)
 {
 
 	RspMessage rcvmsg;