[PATCH] alpha pt_regs cleanups: device_interrupt

callers of ->device_interrupt() do set_irq_regs() now; pt_regs argument
removed, remaining uses of regs in instances of ->device_interrupt()
are switched to get_irq_regs() and will be gone in the next patch.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

22 files changed, 83 insertions, 77 deletions

diff --git a/arch/alpha/kernel/irq_alpha.c b/arch/alpha/kernel/irq_alpha.c
index ddf5cf8dcb0b..d14cc423aa48 100644
--- a/arch/alpha/kernel/irq_alpha.c
+++ b/arch/alpha/kernel/irq_alpha.c
@@ -39,6 +39,7 @@ asmlinkage void
 do_entInt(unsigned long type, unsigned long vector,
           unsigned long la_ptr, struct pt_regs *regs)
 {
+        struct pt_regs *old_regs;
         switch (type) {
         case 0:
 #ifdef CONFIG_SMP
@@ -72,7 +73,9 @@ do_entInt(unsigned long type, unsigned long vector,
                 alpha_mv.machine_check(vector, la_ptr, regs);
                 return;
         case 3:
-                alpha_mv.device_interrupt(vector, regs);
+                old_regs = set_irq_regs(regs);
+                alpha_mv.device_interrupt(vector);
+                set_irq_regs(old_regs);
                 return;
         case 4:
                 perf_irq(la_ptr, regs);
diff --git a/arch/alpha/kernel/irq_i8259.c b/arch/alpha/kernel/irq_i8259.c
index ebbadbc0c36a..6c70f8b97b72 100644
--- a/arch/alpha/kernel/irq_i8259.c
+++ b/arch/alpha/kernel/irq_i8259.c
@@ -137,7 +137,7 @@ init_i8259a_irqs(void)
 
 #if defined(IACK_SC)
 void
-isa_device_interrupt(unsigned long vector, struct pt_regs *regs)
+isa_device_interrupt(unsigned long vector)
 {
         /*
          * Generate a PCI interrupt acknowledge cycle.  The PIC will
@@ -147,7 +147,7 @@ isa_device_interrupt(unsigned long vector, struct pt_regs *regs)
          */
         int j = *(vuip) IACK_SC;
         j &= 0xff;
-        handle_irq(j, regs);
+        handle_irq(j, get_irq_regs());
 }
 #endif
 
diff --git a/arch/alpha/kernel/irq_impl.h b/arch/alpha/kernel/irq_impl.h
index f201d8ffc0d9..5d84dbdcdb89 100644
--- a/arch/alpha/kernel/irq_impl.h
+++ b/arch/alpha/kernel/irq_impl.h
@@ -15,10 +15,10 @@
 
 #define RTC_IRQ    8
 
-extern void isa_device_interrupt(unsigned long, struct pt_regs *);
+extern void isa_device_interrupt(unsigned long);
 extern void isa_no_iack_sc_device_interrupt(unsigned long, struct pt_regs *);
-extern void srm_device_interrupt(unsigned long, struct pt_regs *);
-extern void pyxis_device_interrupt(unsigned long, struct pt_regs *);
+extern void srm_device_interrupt(unsigned long);
+extern void pyxis_device_interrupt(unsigned long);
 
 extern struct irqaction timer_irqaction;
 extern struct irqaction isa_cascade_irqaction;
diff --git a/arch/alpha/kernel/irq_pyxis.c b/arch/alpha/kernel/irq_pyxis.c
index 3b581415bab0..686dc22111b2 100644
--- a/arch/alpha/kernel/irq_pyxis.c
+++ b/arch/alpha/kernel/irq_pyxis.c
@@ -81,7 +81,7 @@ static struct hw_interrupt_type pyxis_irq_type = {
 };
 
 void 
-pyxis_device_interrupt(unsigned long vector, struct pt_regs *regs)
+pyxis_device_interrupt(unsigned long vector)
 {
         unsigned long pld;
         unsigned int i;
@@ -98,9 +98,9 @@ pyxis_device_interrupt(unsigned long vector, struct pt_regs *regs)
                 i = ffz(~pld);
                 pld &= pld - 1; /* clear least bit set */
                 if (i == 7)
-                        isa_device_interrupt(vector, regs);
+                        isa_device_interrupt(vector);
                 else
-                        handle_irq(16+i, regs);
+                        handle_irq(16+i, get_irq_regs());
         }
 }
 
diff --git a/arch/alpha/kernel/irq_srm.c b/arch/alpha/kernel/irq_srm.c
index 8e4d121f84cc..2e9f6d421a8e 100644
--- a/arch/alpha/kernel/irq_srm.c
+++ b/arch/alpha/kernel/irq_srm.c
@@ -72,8 +72,8 @@ init_srm_irqs(long max, unsigned long ignore_mask)
 }
 
 void 
-srm_device_interrupt(unsigned long vector, struct pt_regs * regs)
+srm_device_interrupt(unsigned long vector)
 {
         int irq = (vector - 0x800) >> 4;
-        handle_irq(irq, regs);
+        handle_irq(irq, get_irq_regs());
 }
diff --git a/arch/alpha/kernel/sys_alcor.c b/arch/alpha/kernel/sys_alcor.c
index d6926b7b1e99..2d412c876549 100644
--- a/arch/alpha/kernel/sys_alcor.c
+++ b/arch/alpha/kernel/sys_alcor.c
@@ -100,7 +100,7 @@ static struct hw_interrupt_type alcor_irq_type = {
 };
 
 static void
-alcor_device_interrupt(unsigned long vector, struct pt_regs *regs)
+alcor_device_interrupt(unsigned long vector)
 {
         unsigned long pld;
         unsigned int i;
@@ -116,9 +116,9 @@ alcor_device_interrupt(unsigned long vector, struct pt_regs *regs)
                 i = ffz(~pld);
                 pld &= pld - 1; /* clear least bit set */
                 if (i == 31) {
-                        isa_device_interrupt(vector, regs);
+                        isa_device_interrupt(vector);
                 } else {
-                        handle_irq(16 + i, regs);
+                        handle_irq(16 + i, get_irq_regs());
                 }
         }
 }
diff --git a/arch/alpha/kernel/sys_cabriolet.c b/arch/alpha/kernel/sys_cabriolet.c
index 25a215067da8..e75f0cea6fcc 100644
--- a/arch/alpha/kernel/sys_cabriolet.c
+++ b/arch/alpha/kernel/sys_cabriolet.c
@@ -82,7 +82,7 @@ static struct hw_interrupt_type cabriolet_irq_type = {
 };
 
 static void 
-cabriolet_device_interrupt(unsigned long v, struct pt_regs *r)
+cabriolet_device_interrupt(unsigned long v)
 {
         unsigned long pld;
         unsigned int i;
@@ -98,15 +98,15 @@ cabriolet_device_interrupt(unsigned long v, struct pt_regs *r)
                 i = ffz(~pld);
                 pld &= pld - 1; /* clear least bit set */
                 if (i == 4) {
-                        isa_device_interrupt(v, r);
+                        isa_device_interrupt(v);
                 } else {
-                        handle_irq(16 + i, r);
+                        handle_irq(16 + i, get_irq_regs());
                 }
         }
 }
 
 static void __init
-common_init_irq(void (*srm_dev_int)(unsigned long v, struct pt_regs *r))
+common_init_irq(void (*srm_dev_int)(unsigned long v))
 {
         init_i8259a_irqs();
 
@@ -154,18 +154,18 @@ cabriolet_init_irq(void)
    too invasive though.  */
 
 static void
-pc164_srm_device_interrupt(unsigned long v, struct pt_regs *r)
+pc164_srm_device_interrupt(unsigned long v)
 {
         __min_ipl = getipl();
-        srm_device_interrupt(v, r);
+        srm_device_interrupt(v);
         __min_ipl = 0;
 }
 
 static void
-pc164_device_interrupt(unsigned long v, struct pt_regs *r)
+pc164_device_interrupt(unsigned long v)
 {
         __min_ipl = getipl();
-        cabriolet_device_interrupt(v, r);
+        cabriolet_device_interrupt(v);
         __min_ipl = 0;
 }
 
diff --git a/arch/alpha/kernel/sys_dp264.c b/arch/alpha/kernel/sys_dp264.c
index dd6103b867e7..57dce0098a1b 100644
--- a/arch/alpha/kernel/sys_dp264.c
+++ b/arch/alpha/kernel/sys_dp264.c
@@ -217,7 +217,7 @@ static struct hw_interrupt_type clipper_irq_type = {
 };
 
 static void
-dp264_device_interrupt(unsigned long vector, struct pt_regs * regs)
+dp264_device_interrupt(unsigned long vector)
 {
 #if 1
         printk("dp264_device_interrupt: NOT IMPLEMENTED YET!! \n");
@@ -236,9 +236,9 @@ dp264_device_interrupt(unsigned long vector, struct pt_regs * regs)
                 i = ffz(~pld);
                 pld &= pld - 1; /* clear least bit set */
                 if (i == 55)
-                        isa_device_interrupt(vector, regs);
+                        isa_device_interrupt(vector);
                 else
-                        handle_irq(16 + i, 16 + i, regs);
+                        handle_irq(16 + i, get_irq_regs());
 #if 0
                 TSUNAMI_cchip->dir0.csr = 1UL << i; mb();
                 tmp = TSUNAMI_cchip->dir0.csr;
@@ -248,7 +248,7 @@ dp264_device_interrupt(unsigned long vector, struct pt_regs * regs)
 }
 
 static void 
-dp264_srm_device_interrupt(unsigned long vector, struct pt_regs * regs)
+dp264_srm_device_interrupt(unsigned long vector)
 {
         int irq;
 
@@ -268,11 +268,11 @@ dp264_srm_device_interrupt(unsigned long vector, struct pt_regs * regs)
         if (irq >= 32)
                 irq -= 16;
 
-        handle_irq(irq, regs);
+        handle_irq(irq, get_irq_regs());
 }
 
 static void 
-clipper_srm_device_interrupt(unsigned long vector, struct pt_regs * regs)
+clipper_srm_device_interrupt(unsigned long vector)
 {
         int irq;
 
@@ -290,7 +290,7 @@ clipper_srm_device_interrupt(unsigned long vector, struct pt_regs * regs)
          *
          * Eg IRQ 24 is DRIR bit 8, etc, etc
          */
-        handle_irq(irq, regs);
+        handle_irq(irq, get_irq_regs());
 }
 
 static void __init
diff --git a/arch/alpha/kernel/sys_eb64p.c b/arch/alpha/kernel/sys_eb64p.c
index ed108b66ec09..90d27256d7d6 100644
--- a/arch/alpha/kernel/sys_eb64p.c
+++ b/arch/alpha/kernel/sys_eb64p.c
@@ -80,7 +80,7 @@ static struct hw_interrupt_type eb64p_irq_type = {
 };
 
 static void 
-eb64p_device_interrupt(unsigned long vector, struct pt_regs *regs)
+eb64p_device_interrupt(unsigned long vector)
 {
         unsigned long pld;
         unsigned int i;
@@ -97,9 +97,9 @@ eb64p_device_interrupt(unsigned long vector, struct pt_regs *regs)
                 pld &= pld - 1; /* clear least bit set */
 
                 if (i == 5) {
-                        isa_device_interrupt(vector, regs);
+                        isa_device_interrupt(vector);
                 } else {
-                        handle_irq(16 + i, regs);
+                        handle_irq(16 + i, get_irq_regs());
                 }
         }
 }
diff --git a/arch/alpha/kernel/sys_eiger.c b/arch/alpha/kernel/sys_eiger.c
index 64a785baf53a..f38cded2df97 100644
--- a/arch/alpha/kernel/sys_eiger.c
+++ b/arch/alpha/kernel/sys_eiger.c
@@ -91,7 +91,7 @@ static struct hw_interrupt_type eiger_irq_type = {
 };
 
 static void
-eiger_device_interrupt(unsigned long vector, struct pt_regs * regs)
+eiger_device_interrupt(unsigned long vector)
 {
         unsigned intstatus;
 
@@ -118,20 +118,20 @@ eiger_device_interrupt(unsigned long vector, struct pt_regs * regs)
                  * despatch an interrupt if it's set.
                  */
 
-                if (intstatus & 8) handle_irq(16+3, regs);
-                if (intstatus & 4) handle_irq(16+2, regs);
-                if (intstatus & 2) handle_irq(16+1, regs);
-                if (intstatus & 1) handle_irq(16+0, regs);
+                if (intstatus & 8) handle_irq(16+3, get_irq_regs());
+                if (intstatus & 4) handle_irq(16+2, get_irq_regs());
+                if (intstatus & 2) handle_irq(16+1, get_irq_regs());
+                if (intstatus & 1) handle_irq(16+0, get_irq_regs());
         } else {
-                isa_device_interrupt(vector, regs);
+                isa_device_interrupt(vector);
         }
 }
 
 static void
-eiger_srm_device_interrupt(unsigned long vector, struct pt_regs * regs)
+eiger_srm_device_interrupt(unsigned long vector)
 {
         int irq = (vector - 0x800) >> 4;
-        handle_irq(irq, regs);
+        handle_irq(irq, get_irq_regs());
 }
 
 static void __init
diff --git a/arch/alpha/kernel/sys_jensen.c b/arch/alpha/kernel/sys_jensen.c
index 4ac2b328b8de..fc316369f4d4 100644
--- a/arch/alpha/kernel/sys_jensen.c
+++ b/arch/alpha/kernel/sys_jensen.c
@@ -129,7 +129,7 @@ static struct hw_interrupt_type jensen_local_irq_type = {
 };
 
 static void 
-jensen_device_interrupt(unsigned long vector, struct pt_regs * regs)
+jensen_device_interrupt(unsigned long vector)
 {
         int irq;
 
@@ -189,7 +189,7 @@ jensen_device_interrupt(unsigned long vector, struct pt_regs * regs)
           if (cc - last_msg > ((JENSEN_CYCLES_PER_SEC) * 3) ||
               irq != last_irq) {
                 printk(KERN_CRIT " irq %d count %d cc %u @ %lx\n",
-                       irq, count, cc-last_cc, regs->pc);
+                       irq, count, cc-last_cc, get_irq_regs()->pc);
                 count = 0;
                 last_msg = cc;
                 last_irq = irq;
@@ -198,7 +198,7 @@ jensen_device_interrupt(unsigned long vector, struct pt_regs * regs)
         }
 #endif
 
-        handle_irq(irq, regs);
+        handle_irq(irq, get_irq_regs());
 }
 
 static void __init
diff --git a/arch/alpha/kernel/sys_marvel.c b/arch/alpha/kernel/sys_marvel.c
index 36d215954376..4ea5615be43a 100644
--- a/arch/alpha/kernel/sys_marvel.c
+++ b/arch/alpha/kernel/sys_marvel.c
@@ -38,7 +38,7 @@
  * Interrupt handling.
  */
 static void 
-io7_device_interrupt(unsigned long vector, struct pt_regs * regs)
+io7_device_interrupt(unsigned long vector)
 {
         unsigned int pid;
         unsigned int irq;
@@ -64,7 +64,7 @@ io7_device_interrupt(unsigned long vector, struct pt_regs * regs)
         irq &= MARVEL_IRQ_VEC_IRQ_MASK;         /* not too many bits */
         irq |= pid << MARVEL_IRQ_VEC_PE_SHIFT;  /* merge the pid     */
 
-        handle_irq(irq, regs);
+        handle_irq(irq, get_irq_regs());
 }
 
 static volatile unsigned long *
diff --git a/arch/alpha/kernel/sys_miata.c b/arch/alpha/kernel/sys_miata.c
index 61ac56f8eeea..fbbd95212a96 100644
--- a/arch/alpha/kernel/sys_miata.c
+++ b/arch/alpha/kernel/sys_miata.c
@@ -33,7 +33,7 @@
 
 
 static void 
-miata_srm_device_interrupt(unsigned long vector, struct pt_regs * regs)
+miata_srm_device_interrupt(unsigned long vector)
 {
         int irq;
 
@@ -56,7 +56,7 @@ miata_srm_device_interrupt(unsigned long vector, struct pt_regs * regs)
         if (irq >= 16)
                 irq = irq + 8;
 
-        handle_irq(irq, regs);
+        handle_irq(irq, get_irq_regs());
 }
 
 static void __init
diff --git a/arch/alpha/kernel/sys_mikasa.c b/arch/alpha/kernel/sys_mikasa.c
index cc4c58111366..5429ba0e08f1 100644
--- a/arch/alpha/kernel/sys_mikasa.c
+++ b/arch/alpha/kernel/sys_mikasa.c
@@ -79,7 +79,7 @@ static struct hw_interrupt_type mikasa_irq_type = {
 };
 
 static void 
-mikasa_device_interrupt(unsigned long vector, struct pt_regs *regs)
+mikasa_device_interrupt(unsigned long vector)
 {
         unsigned long pld;
         unsigned int i;
@@ -97,9 +97,9 @@ mikasa_device_interrupt(unsigned long vector, struct pt_regs *regs)
                 i = ffz(~pld);
                 pld &= pld - 1; /* clear least bit set */
                 if (i < 16) {
-                        isa_device_interrupt(vector, regs);
+                        isa_device_interrupt(vector);
                 } else {
-                        handle_irq(i, regs);
+                        handle_irq(i, get_irq_regs());
                 }
         }
 }
diff --git a/arch/alpha/kernel/sys_noritake.c b/arch/alpha/kernel/sys_noritake.c
index 2d3cff7e8c5f..b9a843447b89 100644
--- a/arch/alpha/kernel/sys_noritake.c
+++ b/arch/alpha/kernel/sys_noritake.c
@@ -77,7 +77,7 @@ static struct hw_interrupt_type noritake_irq_type = {
 };
 
 static void 
-noritake_device_interrupt(unsigned long vector, struct pt_regs *regs)
+noritake_device_interrupt(unsigned long vector)
 {
         unsigned long pld;
         unsigned int i;
@@ -96,15 +96,15 @@ noritake_device_interrupt(unsigned long vector, struct pt_regs *regs)
                 i = ffz(~pld);
                 pld &= pld - 1; /* clear least bit set */
                 if (i < 16) {
-                        isa_device_interrupt(vector, regs);
+                        isa_device_interrupt(vector);
                 } else {
-                        handle_irq(i, regs);
+                        handle_irq(i, get_irq_regs());
                 }
         }
 }
 
 static void 
-noritake_srm_device_interrupt(unsigned long vector, struct pt_regs * regs)
+noritake_srm_device_interrupt(unsigned long vector)
 {
         int irq;
 
@@ -122,7 +122,7 @@ noritake_srm_device_interrupt(unsigned long vector, struct pt_regs * regs)
         if (irq >= 16)
                 irq = irq + 1;
 
-        handle_irq(irq, regs);
+        handle_irq(irq, get_irq_regs());
 }
 
 static void __init
diff --git a/arch/alpha/kernel/sys_rawhide.c b/arch/alpha/kernel/sys_rawhide.c
index 949607e3d6fb..bef65162bfab 100644
--- a/arch/alpha/kernel/sys_rawhide.c
+++ b/arch/alpha/kernel/sys_rawhide.c
@@ -134,7 +134,7 @@ static struct hw_interrupt_type rawhide_irq_type = {
 };
 
 static void 
-rawhide_srm_device_interrupt(unsigned long vector, struct pt_regs * regs)
+rawhide_srm_device_interrupt(unsigned long vector)
 {
         int irq;
 
@@ -158,7 +158,7 @@ rawhide_srm_device_interrupt(unsigned long vector, struct pt_regs * regs)
         /* Adjust by which hose it is from.  */
         irq -= ((irq + 16) >> 2) & 0x38;
 
-        handle_irq(irq, regs);
+        handle_irq(irq, get_irq_regs());
 }
 
 static void __init
diff --git a/arch/alpha/kernel/sys_rx164.c b/arch/alpha/kernel/sys_rx164.c
index 6ae506052635..fa8eef8dd8c6 100644
--- a/arch/alpha/kernel/sys_rx164.c
+++ b/arch/alpha/kernel/sys_rx164.c
@@ -83,7 +83,7 @@ static struct hw_interrupt_type rx164_irq_type = {
 };
 
 static void 
-rx164_device_interrupt(unsigned long vector, struct pt_regs *regs)
+rx164_device_interrupt(unsigned long vector)
 {
         unsigned long pld;
         volatile unsigned int *dirr;
@@ -102,9 +102,9 @@ rx164_device_interrupt(unsigned long vector, struct pt_regs *regs)
                 i = ffz(~pld);
                 pld &= pld - 1; /* clear least bit set */
                 if (i == 20) {
-                        isa_no_iack_sc_device_interrupt(vector, regs);
+                        isa_no_iack_sc_device_interrupt(vector, get_irq_regs());
                 } else {
-                        handle_irq(16+i, regs);
+                        handle_irq(16+i, get_irq_regs());
                 }
         }
 }
diff --git a/arch/alpha/kernel/sys_sable.c b/arch/alpha/kernel/sys_sable.c
index a7a14647b50e..791379101e7c 100644
--- a/arch/alpha/kernel/sys_sable.c
+++ b/arch/alpha/kernel/sys_sable.c
@@ -512,7 +512,7 @@ static struct hw_interrupt_type sable_lynx_irq_type = {
 };
 
 static void 
-sable_lynx_srm_device_interrupt(unsigned long vector, struct pt_regs * regs)
+sable_lynx_srm_device_interrupt(unsigned long vector)
 {
         /* Note that the vector reported by the SRM PALcode corresponds
            to the interrupt mask bits, but we have to manage via the
@@ -526,7 +526,7 @@ sable_lynx_srm_device_interrupt(unsigned long vector, struct pt_regs * regs)
         printk("%s: vector 0x%lx bit 0x%x irq 0x%x\n",
                __FUNCTION__, vector, bit, irq);
 #endif
-        handle_irq(irq, regs);
+        handle_irq(irq, get_irq_regs());
 }
 
 static void __init
diff --git a/arch/alpha/kernel/sys_takara.c b/arch/alpha/kernel/sys_takara.c
index 2c75cd1fd81a..ce2d3b081dc8 100644
--- a/arch/alpha/kernel/sys_takara.c
+++ b/arch/alpha/kernel/sys_takara.c
@@ -85,7 +85,7 @@ static struct hw_interrupt_type takara_irq_type = {
 };
 
 static void
-takara_device_interrupt(unsigned long vector, struct pt_regs *regs)
+takara_device_interrupt(unsigned long vector)
 {
         unsigned intstatus;
 
@@ -112,20 +112,20 @@ takara_device_interrupt(unsigned long vector, struct pt_regs *regs)
                  * despatch an interrupt if it's set.
                  */
 
-                if (intstatus & 8) handle_irq(16+3, regs);
-                if (intstatus & 4) handle_irq(16+2, regs);
-                if (intstatus & 2) handle_irq(16+1, regs);
-                if (intstatus & 1) handle_irq(16+0, regs);
+                if (intstatus & 8) handle_irq(16+3, get_irq_regs());
+                if (intstatus & 4) handle_irq(16+2, get_irq_regs());
+                if (intstatus & 2) handle_irq(16+1, get_irq_regs());
+                if (intstatus & 1) handle_irq(16+0, get_irq_regs());
         } else {
-                isa_device_interrupt (vector, regs);
+                isa_device_interrupt (vector);
         }
 }
 
 static void 
-takara_srm_device_interrupt(unsigned long vector, struct pt_regs * regs)
+takara_srm_device_interrupt(unsigned long vector)
 {
         int irq = (vector - 0x800) >> 4;
-        handle_irq(irq, regs);
+        handle_irq(irq, get_irq_regs());
 }
 
 static void __init
diff --git a/arch/alpha/kernel/sys_titan.c b/arch/alpha/kernel/sys_titan.c
index 302aab38d95f..1473aa0e6982 100644
--- a/arch/alpha/kernel/sys_titan.c
+++ b/arch/alpha/kernel/sys_titan.c
@@ -167,18 +167,18 @@ titan_set_irq_affinity(unsigned int irq, cpumask_t affinity)
 }
 
 static void
-titan_device_interrupt(unsigned long vector, struct pt_regs * regs)
+titan_device_interrupt(unsigned long vector)
 {
         printk("titan_device_interrupt: NOT IMPLEMENTED YET!! \n");
 }
 
 static void 
-titan_srm_device_interrupt(unsigned long vector, struct pt_regs * regs)
+titan_srm_device_interrupt(unsigned long vector)
 {
         int irq;
 
         irq = (vector - 0x800) >> 4;
-        handle_irq(irq, regs);
+        handle_irq(irq, get_irq_regs());
 }
 
 
@@ -245,6 +245,7 @@ titan_legacy_init_irq(void)
 void
 titan_dispatch_irqs(u64 mask, struct pt_regs *regs)
 {
+        struct pt_regs *old_regs;
         unsigned long vector;
 
         /*
@@ -252,6 +253,7 @@ titan_dispatch_irqs(u64 mask, struct pt_regs *regs)
          */
         mask &= titan_cpu_irq_affinity[smp_processor_id()];
 
+        old_regs = set_irq_regs(regs);
         /*
          * Dispatch all requested interrupts 
          */
@@ -263,8 +265,9 @@ titan_dispatch_irqs(u64 mask, struct pt_regs *regs)
                 vector = 0x900 + (vector << 4); /* convert to SRM vector */
                 
                 /* dispatch it */
-                alpha_mv.device_interrupt(vector, regs);
+                alpha_mv.device_interrupt(vector);
         }
+        set_irq_regs(old_regs);
 }
   
 
diff --git a/arch/alpha/kernel/sys_wildfire.c b/arch/alpha/kernel/sys_wildfire.c
index 22c5798fe083..ddf5edd0cecd 100644
--- a/arch/alpha/kernel/sys_wildfire.c
+++ b/arch/alpha/kernel/sys_wildfire.c
@@ -234,7 +234,7 @@ wildfire_init_irq(void)
 }
 
 static void 
-wildfire_device_interrupt(unsigned long vector, struct pt_regs * regs)
+wildfire_device_interrupt(unsigned long vector)
 {
         int irq;
 
@@ -246,7 +246,7 @@ wildfire_device_interrupt(unsigned long vector, struct pt_regs * regs)
          * bits 5-0:    irq in PCA
          */
 
-        handle_irq(irq, regs);
+        handle_irq(irq, get_irq_regs());
         return;
 }
 
diff --git a/include/asm-alpha/machvec.h b/include/asm-alpha/machvec.h
index aced22f91752..7ae744240f80 100644
--- a/include/asm-alpha/machvec.h
+++ b/include/asm-alpha/machvec.h
@@ -79,7 +79,7 @@ struct alpha_machine_vector
 
         void (*update_irq_hw)(unsigned long, unsigned long, int);
         void (*ack_irq)(unsigned long);
-        void (*device_interrupt)(unsigned long vector, struct pt_regs *regs);
+        void (*device_interrupt)(unsigned long vector);
         void (*machine_check)(u64 vector, u64 la, struct pt_regs *regs);
 
         void (*smp_callin)(void);