sh: Kill off machvec IRQ hinting.

Everything is using sparseirq these days, so we have no need to
arbitrarily size nr_irqs ahead of time. The legacy IRQ pre-allocation
likewise has no meaning for us, so that's killed off too. We now depend
on nr_irqs expansion by the generic hardirq layer instead.

It's also worth noting that the majority of boards had completely bogus
values for their nr_irqs relative to their CPU and configurations, so
this ends up correcting behaviour for quite a few platforms.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

22 files changed, 12 insertions, 40 deletions

diff --git a/arch/sh/boards/board-edosk7705.c b/arch/sh/boards/board-edosk7705.c
index 0a531a1f6e23..5e24c17bbdad 100644
--- a/arch/sh/boards/board-edosk7705.c
+++ b/arch/sh/boards/board-edosk7705.c
@@ -74,6 +74,5 @@ device_initcall(init_edosk7705_devices);
  */
 static struct sh_machine_vector mv_edosk7705 __initmv = {
         .mv_name                = "EDOSK7705",
-        .mv_nr_irqs             = 80,
         .mv_init_irq            = sh_edosk7705_init_irq,
 };
diff --git a/arch/sh/boards/board-edosk7760.c b/arch/sh/boards/board-edosk7760.c
index d4871d274fb9..bab5b9513904 100644
--- a/arch/sh/boards/board-edosk7760.c
+++ b/arch/sh/boards/board-edosk7760.c
@@ -188,5 +188,4 @@ device_initcall(init_edosk7760_devices);
  */
 struct sh_machine_vector mv_edosk7760 __initmv = {
         .mv_name        = "EDOSK7760",
-        .mv_nr_irqs     = 128,
 };
diff --git a/arch/sh/boards/board-polaris.c b/arch/sh/boards/board-polaris.c
index 594866356c24..37d03c097ae9 100644
--- a/arch/sh/boards/board-polaris.c
+++ b/arch/sh/boards/board-polaris.c
@@ -141,6 +141,5 @@ static void __init init_polaris_irq(void)
 
 static struct sh_machine_vector mv_polaris __initmv = {
         .mv_name                = "Polaris",
-        .mv_nr_irqs             = 61,
         .mv_init_irq            = init_polaris_irq,
 };
diff --git a/arch/sh/boards/board-secureedge5410.c b/arch/sh/boards/board-secureedge5410.c
index 03820c3c93d4..98b36205aa7b 100644
--- a/arch/sh/boards/board-secureedge5410.c
+++ b/arch/sh/boards/board-secureedge5410.c
@@ -71,6 +71,5 @@ static void __init init_snapgear_IRQ(void)
  */
 static struct sh_machine_vector mv_snapgear __initmv = {
         .mv_name                = "SnapGear SecureEdge5410",
-        .mv_nr_irqs             = 72,
         .mv_init_irq            = init_snapgear_IRQ,
 };
diff --git a/arch/sh/boards/mach-cayman/setup.c b/arch/sh/boards/mach-cayman/setup.c
index e89e8e122a26..340fd40b381d 100644
--- a/arch/sh/boards/mach-cayman/setup.c
+++ b/arch/sh/boards/mach-cayman/setup.c
@@ -181,7 +181,6 @@ extern void init_cayman_irq(void);
 
 static struct sh_machine_vector mv_cayman __initmv = {
         .mv_name                = "Hitachi Cayman",
-        .mv_nr_irqs             = 64,
         .mv_ioport_map          = cayman_ioport_map,
         .mv_init_irq            = init_cayman_irq,
 };
diff --git a/arch/sh/boards/mach-hp6xx/setup.c b/arch/sh/boards/mach-hp6xx/setup.c
index db34cad1b76c..05797b33f68e 100644
--- a/arch/sh/boards/mach-hp6xx/setup.c
+++ b/arch/sh/boards/mach-hp6xx/setup.c
@@ -169,8 +169,6 @@ device_initcall(hp6xx_devices_setup);
 static struct sh_machine_vector mv_hp6xx __initmv = {
         .mv_name = "hp6xx",
         .mv_setup = hp6xx_setup,
-        /* IRQ's : CPU(64) + CCHIP(16) + FREE_TO_USE(6) */
-        .mv_nr_irqs = HD64461_IRQBASE + HD64461_IRQ_NUM + 6,
         /* Enable IRQ0 -> IRQ3 in IRQ_MODE */
         .mv_init_irq = hp6xx_init_irq,
 };
diff --git a/arch/sh/boards/mach-lboxre2/setup.c b/arch/sh/boards/mach-lboxre2/setup.c
index 79b4e0d77b71..6660622aa457 100644
--- a/arch/sh/boards/mach-lboxre2/setup.c
+++ b/arch/sh/boards/mach-lboxre2/setup.c
@@ -79,6 +79,5 @@ device_initcall(lboxre2_devices_setup);
  */
 static struct sh_machine_vector mv_lboxre2 __initmv = {
         .mv_name                = "L-BOX RE2",
-        .mv_nr_irqs             = 72,
         .mv_init_irq            = init_lboxre2_IRQ,
 };
diff --git a/arch/sh/boards/mach-microdev/setup.c b/arch/sh/boards/mach-microdev/setup.c
index d8a747291e03..6c66ee4d842b 100644
--- a/arch/sh/boards/mach-microdev/setup.c
+++ b/arch/sh/boards/mach-microdev/setup.c
@@ -194,7 +194,6 @@ device_initcall(microdev_devices_setup);
  */
 static struct sh_machine_vector mv_sh4202_microdev __initmv = {
         .mv_name                = "SH4-202 MicroDev",
-        .mv_nr_irqs             = 72,
         .mv_ioport_map          = microdev_ioport_map,
         .mv_init_irq            = init_microdev_irq,
 };
diff --git a/arch/sh/boards/mach-sdk7780/setup.c b/arch/sh/boards/mach-sdk7780/setup.c
index 4da38db4b5fe..2241659c3299 100644
--- a/arch/sh/boards/mach-sdk7780/setup.c
+++ b/arch/sh/boards/mach-sdk7780/setup.c
@@ -94,7 +94,6 @@ static void __init sdk7780_setup(char **cmdline_p)
 static struct sh_machine_vector mv_se7780 __initmv = {
         .mv_name        = "Renesas SDK7780-R3" ,
         .mv_setup               = sdk7780_setup,
-        .mv_nr_irqs             = 111,
         .mv_init_irq    = init_sdk7780_IRQ,
 };
 
diff --git a/arch/sh/boards/mach-se/7206/setup.c b/arch/sh/boards/mach-se/7206/setup.c
index 8ab8330e3fd1..68883ec95682 100644
--- a/arch/sh/boards/mach-se/7206/setup.c
+++ b/arch/sh/boards/mach-se/7206/setup.c
@@ -90,7 +90,6 @@ static int se7206_mode_pins(void)
 
 static struct sh_machine_vector mv_se __initmv = {
         .mv_name                = "SolutionEngine",
-        .mv_nr_irqs             = 256,
         .mv_init_irq            = init_se7206_IRQ,
         .mv_mode_pins           = se7206_mode_pins,
 };
diff --git a/arch/sh/boards/mach-se/770x/setup.c b/arch/sh/boards/mach-se/770x/setup.c
index 31330c65c0ce..9759d6ba7ffb 100644
--- a/arch/sh/boards/mach-se/770x/setup.c
+++ b/arch/sh/boards/mach-se/770x/setup.c
@@ -184,16 +184,5 @@ device_initcall(se_devices_setup);
 static struct sh_machine_vector mv_se __initmv = {
         .mv_name                = "SolutionEngine",
         .mv_setup               = smsc_setup,
-#if defined(CONFIG_CPU_SH4)
-        .mv_nr_irqs             = 48,
-#elif defined(CONFIG_CPU_SUBTYPE_SH7708)
-        .mv_nr_irqs             = 32,
-#elif defined(CONFIG_CPU_SUBTYPE_SH7709)
-        .mv_nr_irqs             = 61,
-#elif defined(CONFIG_CPU_SUBTYPE_SH7705)
-        .mv_nr_irqs             = 86,
-#elif defined(CONFIG_CPU_SUBTYPE_SH7710) || defined(CONFIG_CPU_SUBTYPE_SH7712)
-        .mv_nr_irqs             = 104,
-#endif
         .mv_init_irq            = init_se_IRQ,
 };
diff --git a/arch/sh/boards/mach-se/7721/setup.c b/arch/sh/boards/mach-se/7721/setup.c
index 7416ad7ee53a..a0b3dba34ebf 100644
--- a/arch/sh/boards/mach-se/7721/setup.c
+++ b/arch/sh/boards/mach-se/7721/setup.c
@@ -92,6 +92,5 @@ static void __init se7721_setup(char **cmdline_p)
 struct sh_machine_vector mv_se7721 __initmv = {
         .mv_name                = "Solution Engine 7721",
         .mv_setup               = se7721_setup,
-        .mv_nr_irqs             = 109,
         .mv_init_irq            = init_se7721_IRQ,
 };
diff --git a/arch/sh/boards/mach-se/7724/setup.c b/arch/sh/boards/mach-se/7724/setup.c
index 479cdf876fda..dd931e36daf8 100644
--- a/arch/sh/boards/mach-se/7724/setup.c
+++ b/arch/sh/boards/mach-se/7724/setup.c
@@ -929,5 +929,4 @@ device_initcall(devices_setup);
 static struct sh_machine_vector mv_ms7724se __initmv = {
         .mv_name        = "ms7724se",
         .mv_init_irq    = init_se7724_IRQ,
-        .mv_nr_irqs     = SE7724_FPGA_IRQ_BASE + SE7724_FPGA_IRQ_NR,
 };
diff --git a/arch/sh/boards/mach-se/7751/setup.c b/arch/sh/boards/mach-se/7751/setup.c
index 4ed60c5e221f..820f4e7ba0d2 100644
--- a/arch/sh/boards/mach-se/7751/setup.c
+++ b/arch/sh/boards/mach-se/7751/setup.c
@@ -55,6 +55,5 @@ device_initcall(se7751_devices_setup);
  */
 static struct sh_machine_vector mv_7751se __initmv = {
         .mv_name                = "7751 SolutionEngine",
-        .mv_nr_irqs             = 72,
         .mv_init_irq            = init_7751se_IRQ,
 };
diff --git a/arch/sh/boards/mach-se/7780/setup.c b/arch/sh/boards/mach-se/7780/setup.c
index 6f7c207138e1..ae5a1d84fdf8 100644
--- a/arch/sh/boards/mach-se/7780/setup.c
+++ b/arch/sh/boards/mach-se/7780/setup.c
@@ -110,6 +110,5 @@ static void __init se7780_setup(char **cmdline_p)
 static struct sh_machine_vector mv_se7780 __initmv = {
         .mv_name                = "Solution Engine 7780" ,
         .mv_setup               = se7780_setup ,
-        .mv_nr_irqs             = 111 ,
         .mv_init_irq            = init_se7780_IRQ,
 };
diff --git a/arch/sh/boards/mach-se/board-se7619.c b/arch/sh/boards/mach-se/board-se7619.c
index 82b6d4a5dc02..958bcd7aacc5 100644
--- a/arch/sh/boards/mach-se/board-se7619.c
+++ b/arch/sh/boards/mach-se/board-se7619.c
@@ -22,6 +22,5 @@ static int se7619_mode_pins(void)
 
 static struct sh_machine_vector mv_se __initmv = {
         .mv_name                = "SolutionEngine",
-        .mv_nr_irqs             = 108,
         .mv_mode_pins           = se7619_mode_pins,
 };
diff --git a/arch/sh/boards/mach-sh03/setup.c b/arch/sh/boards/mach-sh03/setup.c
index d4f79b2a6514..f582dab59343 100644
--- a/arch/sh/boards/mach-sh03/setup.c
+++ b/arch/sh/boards/mach-sh03/setup.c
@@ -101,6 +101,5 @@ device_initcall(sh03_devices_setup);
 static struct sh_machine_vector mv_sh03 __initmv = {
         .mv_name                = "Interface (CTP/PCI-SH03)",
         .mv_setup               = sh03_setup,
-        .mv_nr_irqs             = 48,
         .mv_init_irq            = init_sh03_IRQ,
 };
diff --git a/arch/sh/boards/mach-sh7763rdp/setup.c b/arch/sh/boards/mach-sh7763rdp/setup.c
index 36e8b88cd04e..b7c75298dfb5 100644
--- a/arch/sh/boards/mach-sh7763rdp/setup.c
+++ b/arch/sh/boards/mach-sh7763rdp/setup.c
@@ -214,6 +214,5 @@ static void __init sh7763rdp_setup(char **cmdline_p)
 static struct sh_machine_vector mv_sh7763rdp __initmv = {
         .mv_name = "sh7763drp",
         .mv_setup = sh7763rdp_setup,
-        .mv_nr_irqs = 112,
         .mv_init_irq = init_sh7763rdp_IRQ,
 };
diff --git a/arch/sh/include/asm/irq.h b/arch/sh/include/asm/irq.h
index 2a62017eb275..0e4f532e4737 100644
--- a/arch/sh/include/asm/irq.h
+++ b/arch/sh/include/asm/irq.h
@@ -5,12 +5,15 @@
 #include <asm/machvec.h>
 
 /*
- * A sane default based on a reasonable vector table size, platforms are
- * advised to cap this at the hard limit that they're interested in
- * through the machvec.
+ * Only legacy non-sparseirq platforms have to set a reasonably sane
+ * value here. sparseirq platforms allocate their irq_descs on the fly,
+ * so will expand automatically based on the number of registered IRQs.
  */
-#define NR_IRQS                 512
-#define NR_IRQS_LEGACY          8       /* Legacy external IRQ0-7 */
+#ifdef CONFIG_SPARSE_IRQ
+# define NR_IRQS                8
+#else
+# define NR_IRQS                512
+#endif
 
 /*
  * This is a special IRQ number for indicating that no IRQ has been
diff --git a/arch/sh/include/asm/machvec.h b/arch/sh/include/asm/machvec.h
index 57c5c3d0f39f..eb9c20d971dd 100644
--- a/arch/sh/include/asm/machvec.h
+++ b/arch/sh/include/asm/machvec.h
@@ -17,7 +17,6 @@
 struct sh_machine_vector {
         void (*mv_setup)(char **cmdline_p);
         const char *mv_name;
-        int mv_nr_irqs;
 
         int (*mv_irq_demux)(int irq);
         void (*mv_init_irq)(void);
diff --git a/arch/sh/kernel/irq.c b/arch/sh/kernel/irq.c
index a3ee91971129..dadce735f746 100644
--- a/arch/sh/kernel/irq.c
+++ b/arch/sh/kernel/irq.c
@@ -234,8 +234,10 @@ void __init init_IRQ(void)
 #ifdef CONFIG_SPARSE_IRQ
 int __init arch_probe_nr_irqs(void)
 {
-        nr_irqs = sh_mv.mv_nr_irqs;
-        return NR_IRQS_LEGACY;
+        /*
+         * No pre-allocated IRQs.
+         */
+        return 0;
 }
 #endif
 
diff --git a/arch/sh/kernel/machvec.c b/arch/sh/kernel/machvec.c
index 3d722e49db08..ec05f491c347 100644
--- a/arch/sh/kernel/machvec.c
+++ b/arch/sh/kernel/machvec.c
@@ -121,7 +121,4 @@ void __init sh_mv_setup(void)
         mv_set(irq_demux);
         mv_set(mode_pins);
         mv_set(mem_init);
-
-        if (!sh_mv.mv_nr_irqs)
-                sh_mv.mv_nr_irqs = NR_IRQS;
 }