10 files changed, 78 insertions, 24 deletions

diff --git a/arch/sh/kernel/cf-enabler.c b/arch/sh/kernel/cf-enabler.c
index 0758d48147a0..849a9e191391 100644
--- a/arch/sh/kernel/cf-enabler.c
+++ b/arch/sh/kernel/cf-enabler.c
@@ -31,7 +31,7 @@
  */
 #if defined(CONFIG_CPU_SH4)
 /* SH4 can't access PCMCIA interface through P2 area.
- * we must remap it with appropreate attribute bit of the page set.
+ * we must remap it with appropriate attribute bit of the page set.
  * this part is based on Greg Banks' hd64465_ss.c implementation - Masahiro Abe */
 
 #if defined(CONFIG_CF_AREA6)
diff --git a/arch/sh/kernel/cpu/clock.c b/arch/sh/kernel/cpu/clock.c
index 014f318f5a05..63251549e9a8 100644
--- a/arch/sh/kernel/cpu/clock.c
+++ b/arch/sh/kernel/cpu/clock.c
@@ -278,6 +278,11 @@ arch_init_clk_ops(struct clk_ops **ops, int type)
 {
 }
 
+void __init __attribute__ ((weak))
+arch_clk_init(void)
+{
+}
+
 static int show_clocks(char *buf, char **start, off_t off,
                        int len, int *eof, void *data)
 {
@@ -314,6 +319,8 @@ int __init clk_init(void)
                 ret |= clk_register(clk);
         }
 
+        arch_clk_init();
+
         /* Kick the child clocks.. */
         propagate_rate(&master_clk);
         propagate_rate(&bus_clk);
diff --git a/arch/sh/kernel/cpu/irq/maskreg.c b/arch/sh/kernel/cpu/irq/maskreg.c
index 492db31b3cab..978992e367a5 100644
--- a/arch/sh/kernel/cpu/irq/maskreg.c
+++ b/arch/sh/kernel/cpu/irq/maskreg.c
@@ -38,7 +38,7 @@ static struct hw_interrupt_type maskreg_irq_type = {
         .end = end_maskreg_irq
 };
 
-/* actual implementatin */
+/* actual implementation */
 static unsigned int startup_maskreg_irq(unsigned int irq)
 {
         enable_maskreg_irq(irq);
diff --git a/arch/sh/kernel/cpu/sh4/fpu.c b/arch/sh/kernel/cpu/sh4/fpu.c
index d61dd599169f..c5a4fc77fa06 100644
--- a/arch/sh/kernel/cpu/sh4/fpu.c
+++ b/arch/sh/kernel/cpu/sh4/fpu.c
@@ -138,7 +138,7 @@ restore_fpu(struct task_struct *tsk)
 /*
  * Load the FPU with signalling NANS.  This bit pattern we're using
  * has the property that no matter wether considered as single or as
- * double precission represents signaling NANS.  
+ * double precision represents signaling NANS.  
  */
 
 static void
diff --git a/arch/sh/kernel/cpu/sh4/setup-sh7750.c b/arch/sh/kernel/cpu/sh4/setup-sh7750.c
index 6f8f458912c7..03b14cf78ddf 100644
--- a/arch/sh/kernel/cpu/sh4/setup-sh7750.c
+++ b/arch/sh/kernel/cpu/sh4/setup-sh7750.c
@@ -106,6 +106,7 @@ static struct ipr_data sh7750_ipr_map[] = {
         { 38, 2,  8, 7 }, /* DMAC DMAE */
 };
 
+#ifdef CONFIG_CPU_SUBTYPE_SH7751
 static struct ipr_data sh7751_ipr_map[] = {
         { 44, 2,  8, 7 }, /* DMAC DMTE4 */
         { 45, 2,  8, 7 }, /* DMAC DMTE5 */
@@ -117,6 +118,7 @@ static struct ipr_data sh7751_ipr_map[] = {
         /*{ 72, INTPRI00,  8, ? },*/ /* TMU3 TUNI */
         /*{ 76, INTPRI00, 12, ? },*/ /* TMU4 TUNI */
 };
+#endif
 
 static unsigned long ipr_offsets[] = {
         0xffd00004UL,   /* 0: IPRA */
diff --git a/arch/sh/kernel/cpu/sh4a/clock-sh7722.c b/arch/sh/kernel/cpu/sh4a/clock-sh7722.c
index 29090035bc5b..51b386d454de 100644
--- a/arch/sh/kernel/cpu/sh4a/clock-sh7722.c
+++ b/arch/sh/kernel/cpu/sh4a/clock-sh7722.c
@@ -17,7 +17,6 @@
 #include <asm/clock.h>
 #include <asm/freq.h>
 
-#define SH7722_PLL_FREQ (32000000/8)
 #define N  (-1)
 #define NM (-2)
 #define ROUND_NEAREST 0
@@ -141,28 +140,36 @@ static void adjust_clocks(int originate, int *l, unsigned long v[],
 */
 static int divisors2[] = { 2, 3, 4, 5, 6, 8, 10, 12, 16, 20, 24, 32, 40 };
 
+static void master_clk_recalc(struct clk *clk)
+{
+        unsigned frqcr = ctrl_inl(FRQCR);
+
+        clk->rate = CONFIG_SH_PCLK_FREQ * (((frqcr >> 24) & 0x1f) + 1);
+}
+
 static void master_clk_init(struct clk *clk)
 {
-        clk_set_rate(clk, clk_get_rate(clk));
+        clk->parent = NULL;
+        clk->flags |= CLK_RATE_PROPAGATES;
+        clk->rate = CONFIG_SH_PCLK_FREQ;
+        master_clk_recalc(clk);
 }
 
-static void master_clk_recalc(struct clk *clk)
+
+static void module_clk_recalc(struct clk *clk)
 {
         unsigned long frqcr = ctrl_inl(FRQCR);
 
-        clk->rate = CONFIG_SH_PCLK_FREQ * (1 + (frqcr >> 24 & 0xF));
+        clk->rate = clk->parent->rate / (((frqcr >> 24) & 0x1f) + 1);
 }
 
 static int master_clk_setrate(struct clk *clk, unsigned long rate, int id)
 {
-        int div = rate / SH7722_PLL_FREQ;
+        int div = rate / clk->rate;
         int master_divs[] = { 2, 3, 4, 6, 8, 16 };
         int index;
         unsigned long frqcr;
 
-        if (rate < SH7722_PLL_FREQ * 2)
-                return -EINVAL;
-
         for (index = 1; index < ARRAY_SIZE(master_divs); index++)
                 if (div >= master_divs[index - 1] && div < master_divs[index])
                         break;
@@ -185,6 +192,10 @@ static struct clk_ops sh7722_master_clk_ops = {
         .set_rate = master_clk_setrate,
 };
 
+static struct clk_ops sh7722_module_clk_ops = {
+       .recalc = module_clk_recalc,
+};
+
 struct frqcr_context {
         unsigned mask;
         unsigned shift;
@@ -489,7 +500,7 @@ static void sh7722_siu_recalc(struct clk *clk)
 
         if (siu < 0)
                 return /* siu */ ;
-        BUG_ON(siu > 1);
+        BUG_ON(siu > 2);
         r = ctrl_inl(sh7722_siu_regs[siu]);
         clk->rate = clk->parent->rate * 2 / divisors2[r & 0xF];
 }
@@ -571,7 +582,7 @@ static struct clk *sh7722_clocks[] = {
  */
 struct clk_ops *onchip_ops[] = {
         &sh7722_master_clk_ops,
-        &sh7722_frqcr_clk_ops,
+        &sh7722_module_clk_ops,
         &sh7722_frqcr_clk_ops,
         &sh7722_frqcr_clk_ops,
 };
@@ -583,7 +594,7 @@ arch_init_clk_ops(struct clk_ops **ops, int type)
         *ops = onchip_ops[type];
 }
 
-int __init sh7722_clock_init(void)
+int __init arch_clk_init(void)
 {
         struct clk *master;
         int i;
@@ -597,4 +608,3 @@ int __init sh7722_clock_init(void)
         clk_put(master);
         return 0;
 }
-arch_initcall(sh7722_clock_init);
diff --git a/arch/sh/kernel/kgdb_stub.c b/arch/sh/kernel/kgdb_stub.c
index a5323364cbca..edd1ec214e6d 100644
--- a/arch/sh/kernel/kgdb_stub.c
+++ b/arch/sh/kernel/kgdb_stub.c
@@ -2,7 +2,7 @@
  * May be copied or modified under the terms of the GNU General Public
  * License.  See linux/COPYING for more information.
  *
- * Containes extracts from code by Glenn Engel, Jim Kingdon,
+ * Contains extracts from code by Glenn Engel, Jim Kingdon,
  * David Grothe <dave@gcom.com>, Tigran Aivazian <tigran@sco.com>,
  * Amit S. Kale <akale@veritas.com>,  William Gatliff <bgat@open-widgets.com>,
  * Ben Lee, Steve Chamberlain and Benoit Miller <fulg@iname.com>.
@@ -85,7 +85,7 @@
  *
  * Responses can be run-length encoded to save space.  A '*' means that
  * the next character is an ASCII encoding giving a repeat count which
- * stands for that many repititions of the character preceding the '*'.
+ * stands for that many repetitions of the character preceding the '*'.
  * The encoding is n+29, yielding a printable character where n >=3
  * (which is where RLE starts to win).  Don't use an n > 126.
  *
diff --git a/arch/sh/kernel/process.c b/arch/sh/kernel/process.c
index 6b4f5748d0be..a11e2aa73cbc 100644
--- a/arch/sh/kernel/process.c
+++ b/arch/sh/kernel/process.c
@@ -26,8 +26,6 @@
 static int hlt_counter;
 int ubc_usercnt = 0;
 
-#define HARD_IDLE_TIMEOUT (HZ / 3)
-
 void (*pm_idle)(void);
 void (*pm_power_off)(void);
 EXPORT_SYMBOL(pm_power_off);
@@ -44,16 +42,39 @@ void enable_hlt(void)
 }
 EXPORT_SYMBOL(enable_hlt);
 
+static int __init nohlt_setup(char *__unused)
+{
+        hlt_counter = 1;
+        return 1;
+}
+__setup("nohlt", nohlt_setup);
+
+static int __init hlt_setup(char *__unused)
+{
+        hlt_counter = 0;
+        return 1;
+}
+__setup("hlt", hlt_setup);
+
 void default_idle(void)
 {
-        if (!hlt_counter)
-                cpu_sleep();
-        else
-                cpu_relax();
+        if (!hlt_counter) {
+                clear_thread_flag(TIF_POLLING_NRFLAG);
+                smp_mb__after_clear_bit();
+                set_bl_bit();
+                while (!need_resched())
+                        cpu_sleep();
+                clear_bl_bit();
+                set_thread_flag(TIF_POLLING_NRFLAG);
+        } else
+                while (!need_resched())
+                        cpu_relax();
 }
 
 void cpu_idle(void)
 {
+        set_thread_flag(TIF_POLLING_NRFLAG);
+
         /* endless idle loop with no priority at all */
         while (1) {
                 void (*idle)(void) = pm_idle;
diff --git a/arch/sh/kernel/syscalls.S b/arch/sh/kernel/syscalls.S
index 4357d1a6358f..7db1c2dc5992 100644
--- a/arch/sh/kernel/syscalls.S
+++ b/arch/sh/kernel/syscalls.S
@@ -355,3 +355,6 @@ ENTRY(sys_call_table)
         .long sys_getcpu
         .long sys_epoll_pwait
         .long sys_utimensat             /* 320 */
+        .long sys_signalfd
+        .long sys_timerfd
+        .long sys_eventfd
diff --git a/arch/sh/kernel/traps.c b/arch/sh/kernel/traps.c
index 3a197649cd83..5b75cb6f8f9b 100644
--- a/arch/sh/kernel/traps.c
+++ b/arch/sh/kernel/traps.c
@@ -21,6 +21,7 @@
 #include <linux/bug.h>
 #include <linux/debug_locks.h>
 #include <linux/kdebug.h>
+#include <linux/kexec.h>
 #include <linux/limits.h>
 #include <asm/system.h>
 #include <asm/uaccess.h>
@@ -101,6 +102,16 @@ void die(const char * str, struct pt_regs * regs, long err)
 
         bust_spinlocks(0);
         spin_unlock_irq(&die_lock);
+
+        if (kexec_should_crash(current))
+                crash_kexec(regs);
+
+        if (in_interrupt())
+                panic("Fatal exception in interrupt");
+
+        if (panic_on_oops)
+                panic("Fatal exception");
+
         do_exit(SIGSEGV);
 }
 
@@ -513,7 +524,7 @@ static int handle_unaligned_access(u16 instruction, struct pt_regs *regs)
  *       misaligned data access
  *       access to >= 0x80000000 is user mode
  * Unfortuntaly we can't distinguish between instruction address error
- * and data address errors caused by read acceses.
+ * and data address errors caused by read accesses.
  */
 asmlinkage void do_address_error(struct pt_regs *regs,
                                  unsigned long writeaccess,