Merge 3.7-rc6 into tty-next

5 files changed, 116 insertions, 228 deletions

diff --git a/arch/mips/include/asm/bitops.h b/arch/mips/include/asm/bitops.h
index 82ad35ce2b45..46ac73abd5ee 100644
--- a/arch/mips/include/asm/bitops.h
+++ b/arch/mips/include/asm/bitops.h
@@ -14,7 +14,6 @@
 #endif
 
 #include <linux/compiler.h>
-#include <linux/irqflags.h>
 #include <linux/types.h>
 #include <asm/barrier.h>
 #include <asm/byteorder.h>		/* sigh ... */
@@ -44,6 +43,24 @@
 #define smp_mb__before_clear_bit()	smp_mb__before_llsc()
 #define smp_mb__after_clear_bit()	smp_llsc_mb()
 
+
+/*
+ * These are the "slower" versions of the functions and are in bitops.c.
+ * These functions call raw_local_irq_{save,restore}().
+ */
+void __mips_set_bit(unsigned long nr, volatile unsigned long *addr);
+void __mips_clear_bit(unsigned long nr, volatile unsigned long *addr);
+void __mips_change_bit(unsigned long nr, volatile unsigned long *addr);
+int __mips_test_and_set_bit(unsigned long nr,
+			    volatile unsigned long *addr);
+int __mips_test_and_set_bit_lock(unsigned long nr,
+				 volatile unsigned long *addr);
+int __mips_test_and_clear_bit(unsigned long nr,
+			      volatile unsigned long *addr);
+int __mips_test_and_change_bit(unsigned long nr,
+			       volatile unsigned long *addr);
+
+
 /*
  * set_bit - Atomically set a bit in memory
  * @nr: the bit to set
@@ -57,7 +74,7 @@
 static inline void set_bit(unsigned long nr, volatile unsigned long *addr)
 {
 	unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG);
-	unsigned short bit = nr & SZLONG_MASK;
+	int bit = nr & SZLONG_MASK;
 	unsigned long temp;
 
 	if (kernel_uses_llsc && R10000_LLSC_WAR) {
@@ -92,17 +109,8 @@ static inline void set_bit(unsigned long nr, volatile unsigned long *addr)
 			: "=&r" (temp), "+m" (*m)
 			: "ir" (1UL << bit));
 		} while (unlikely(!temp));
-	} else {
-		volatile unsigned long *a = addr;
-		unsigned long mask;
-		unsigned long flags;
-
-		a += nr >> SZLONG_LOG;
-		mask = 1UL << bit;
-		raw_local_irq_save(flags);
-		*a |= mask;
-		raw_local_irq_restore(flags);
-	}
+	} else
+		__mips_set_bit(nr, addr);
 }
 
 /*
@@ -118,7 +126,7 @@ static inline void set_bit(unsigned long nr, volatile unsigned long *addr)
 static inline void clear_bit(unsigned long nr, volatile unsigned long *addr)
 {
 	unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG);
-	unsigned short bit = nr & SZLONG_MASK;
+	int bit = nr & SZLONG_MASK;
 	unsigned long temp;
 
 	if (kernel_uses_llsc && R10000_LLSC_WAR) {
@@ -153,17 +161,8 @@ static inline void clear_bit(unsigned long nr, volatile unsigned long *addr)
 			: "=&r" (temp), "+m" (*m)
 			: "ir" (~(1UL << bit)));
 		} while (unlikely(!temp));
-	} else {
-		volatile unsigned long *a = addr;
-		unsigned long mask;
-		unsigned long flags;
-
-		a += nr >> SZLONG_LOG;
-		mask = 1UL << bit;
-		raw_local_irq_save(flags);
-		*a &= ~mask;
-		raw_local_irq_restore(flags);
-	}
+	} else
+		__mips_clear_bit(nr, addr);
 }
 
 /*
@@ -191,7 +190,7 @@ static inline void clear_bit_unlock(unsigned long nr, volatile unsigned long *ad
  */
 static inline void change_bit(unsigned long nr, volatile unsigned long *addr)
 {
-	unsigned short bit = nr & SZLONG_MASK;
+	int bit = nr & SZLONG_MASK;
 
 	if (kernel_uses_llsc && R10000_LLSC_WAR) {
 		unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG);
@@ -220,17 +219,8 @@ static inline void change_bit(unsigned long nr, volatile unsigned long *addr)
 			: "=&r" (temp), "+m" (*m)
 			: "ir" (1UL << bit));
 		} while (unlikely(!temp));
-	} else {
-		volatile unsigned long *a = addr;
-		unsigned long mask;
-		unsigned long flags;
-
-		a += nr >> SZLONG_LOG;
-		mask = 1UL << bit;
-		raw_local_irq_save(flags);
-		*a ^= mask;
-		raw_local_irq_restore(flags);
-	}
+	} else
+		__mips_change_bit(nr, addr);
 }
 
 /*
@@ -244,7 +234,7 @@ static inline void change_bit(unsigned long nr, volatile unsigned long *addr)
 static inline int test_and_set_bit(unsigned long nr,
 	volatile unsigned long *addr)
 {
-	unsigned short bit = nr & SZLONG_MASK;
+	int bit = nr & SZLONG_MASK;
 	unsigned long res;
 
 	smp_mb__before_llsc();
@@ -281,18 +271,8 @@ static inline int test_and_set_bit(unsigned long nr,
 		} while (unlikely(!res));
 
 		res = temp & (1UL << bit);
-	} else {
-		volatile unsigned long *a = addr;
-		unsigned long mask;
-		unsigned long flags;
-
-		a += nr >> SZLONG_LOG;
-		mask = 1UL << bit;
-		raw_local_irq_save(flags);
-		res = (mask & *a);
-		*a |= mask;
-		raw_local_irq_restore(flags);
-	}
+	} else
+		res = __mips_test_and_set_bit(nr, addr);
 
 	smp_llsc_mb();
 
@@ -310,7 +290,7 @@ static inline int test_and_set_bit(unsigned long nr,
 static inline int test_and_set_bit_lock(unsigned long nr,
 	volatile unsigned long *addr)
 {
-	unsigned short bit = nr & SZLONG_MASK;
+	int bit = nr & SZLONG_MASK;
 	unsigned long res;
 
 	if (kernel_uses_llsc && R10000_LLSC_WAR) {
@@ -345,18 +325,8 @@ static inline int test_and_set_bit_lock(unsigned long nr,
 		} while (unlikely(!res));
 
 		res = temp & (1UL << bit);
-	} else {
-		volatile unsigned long *a = addr;
-		unsigned long mask;
-		unsigned long flags;
-
-		a += nr >> SZLONG_LOG;
-		mask = 1UL << bit;
-		raw_local_irq_save(flags);
-		res = (mask & *a);
-		*a |= mask;
-		raw_local_irq_restore(flags);
-	}
+	} else
+		res = __mips_test_and_set_bit_lock(nr, addr);
 
 	smp_llsc_mb();
 
@@ -373,7 +343,7 @@ static inline int test_and_set_bit_lock(unsigned long nr,
 static inline int test_and_clear_bit(unsigned long nr,
 	volatile unsigned long *addr)
 {
-	unsigned short bit = nr & SZLONG_MASK;
+	int bit = nr & SZLONG_MASK;
 	unsigned long res;
 
 	smp_mb__before_llsc();
@@ -428,18 +398,8 @@ static inline int test_and_clear_bit(unsigned long nr,
 		} while (unlikely(!res));
 
 		res = temp & (1UL << bit);
-	} else {
-		volatile unsigned long *a = addr;
-		unsigned long mask;
-		unsigned long flags;
-
-		a += nr >> SZLONG_LOG;
-		mask = 1UL << bit;
-		raw_local_irq_save(flags);
-		res = (mask & *a);
-		*a &= ~mask;
-		raw_local_irq_restore(flags);
-	}
+	} else
+		res = __mips_test_and_clear_bit(nr, addr);
 
 	smp_llsc_mb();
 
@@ -457,7 +417,7 @@ static inline int test_and_clear_bit(unsigned long nr,
 static inline int test_and_change_bit(unsigned long nr,
 	volatile unsigned long *addr)
 {
-	unsigned short bit = nr & SZLONG_MASK;
+	int bit = nr & SZLONG_MASK;
 	unsigned long res;
 
 	smp_mb__before_llsc();
@@ -494,18 +454,8 @@ static inline int test_and_change_bit(unsigned long nr,
 		} while (unlikely(!res));
 
 		res = temp & (1UL << bit);
-	} else {
-		volatile unsigned long *a = addr;
-		unsigned long mask;
-		unsigned long flags;
-
-		a += nr >> SZLONG_LOG;
-		mask = 1UL << bit;
-		raw_local_irq_save(flags);
-		res = (mask & *a);
-		*a ^= mask;
-		raw_local_irq_restore(flags);
-	}
+	} else
+		res = __mips_test_and_change_bit(nr, addr);
 
 	smp_llsc_mb();
 
diff --git a/arch/mips/include/asm/compat.h b/arch/mips/include/asm/compat.h
index 58277e0e9cd4..3c5d1464b7bd 100644
--- a/arch/mips/include/asm/compat.h
+++ b/arch/mips/include/asm/compat.h
@@ -290,7 +290,7 @@ struct compat_shmid64_ds {
 
 static inline int is_compat_task(void)
 {
-	return test_thread_flag(TIF_32BIT);
+	return test_thread_flag(TIF_32BIT_ADDR);
 }
 
 #endif /* _ASM_COMPAT_H */
diff --git a/arch/mips/include/asm/io.h b/arch/mips/include/asm/io.h
index 29d9c23c20c7..ff2e0345e013 100644
--- a/arch/mips/include/asm/io.h
+++ b/arch/mips/include/asm/io.h
@@ -15,6 +15,7 @@
 #include <linux/compiler.h>
 #include <linux/kernel.h>
 #include <linux/types.h>
+#include <linux/irqflags.h>
 
 #include <asm/addrspace.h>
 #include <asm/bug.h>
diff --git a/arch/mips/include/asm/irqflags.h b/arch/mips/include/asm/irqflags.h
index 309cbcd6909c..9f3384c789d7 100644
--- a/arch/mips/include/asm/irqflags.h
+++ b/arch/mips/include/asm/irqflags.h
@@ -16,83 +16,13 @@
 #include <linux/compiler.h>
 #include <asm/hazards.h>
 
-__asm__(
-	"	.macro	arch_local_irq_enable				\n"
-	"	.set	push						\n"
-	"	.set	reorder						\n"
-	"	.set	noat						\n"
-#ifdef CONFIG_MIPS_MT_SMTC
-	"	mfc0	$1, $2, 1	# SMTC - clear TCStatus.IXMT	\n"
-	"	ori	$1, 0x400					\n"
-	"	xori	$1, 0x400					\n"
-	"	mtc0	$1, $2, 1					\n"
-#elif defined(CONFIG_CPU_MIPSR2)
-	"	ei							\n"
-#else
-	"	mfc0	$1,$12						\n"
-	"	ori	$1,0x1f						\n"
-	"	xori	$1,0x1e						\n"
-	"	mtc0	$1,$12						\n"
-#endif
-	"	irq_enable_hazard					\n"
-	"	.set	pop						\n"
-	"	.endm");
+#if defined(CONFIG_CPU_MIPSR2) && !defined(CONFIG_MIPS_MT_SMTC)
 
-extern void smtc_ipi_replay(void);
-
-static inline void arch_local_irq_enable(void)
-{
-#ifdef CONFIG_MIPS_MT_SMTC
-	/*
-	 * SMTC kernel needs to do a software replay of queued
-	 * IPIs, at the cost of call overhead on each local_irq_enable()
-	 */
-	smtc_ipi_replay();
-#endif
-	__asm__ __volatile__(
-		"arch_local_irq_enable"
-		: /* no outputs */
-		: /* no inputs */
-		: "memory");
-}
-
-
-/*
- * For cli() we have to insert nops to make sure that the new value
- * has actually arrived in the status register before the end of this
- * macro.
- * R4000/R4400 need three nops, the R4600 two nops and the R10000 needs
- * no nops at all.
- */
-/*
- * For TX49, operating only IE bit is not enough.
- *
- * If mfc0 $12 follows store and the mfc0 is last instruction of a
- * page and fetching the next instruction causes TLB miss, the result
- * of the mfc0 might wrongly contain EXL bit.
- *
- * ERT-TX49H2-027, ERT-TX49H3-012, ERT-TX49HL3-006, ERT-TX49H4-008
- *
- * Workaround: mask EXL bit of the result or place a nop before mfc0.
- */
 __asm__(
 	"	.macro	arch_local_irq_disable\n"
 	"	.set	push						\n"
 	"	.set	noat						\n"
-#ifdef CONFIG_MIPS_MT_SMTC
-	"	mfc0	$1, $2, 1					\n"
-	"	ori	$1, 0x400					\n"
-	"	.set	noreorder					\n"
-	"	mtc0	$1, $2, 1					\n"
-#elif defined(CONFIG_CPU_MIPSR2)
 	"	di							\n"
-#else
-	"	mfc0	$1,$12						\n"
-	"	ori	$1,0x1f						\n"
-	"	xori	$1,0x1f						\n"
-	"	.set	noreorder					\n"
-	"	mtc0	$1,$12						\n"
-#endif
 	"	irq_disable_hazard					\n"
 	"	.set	pop						\n"
 	"	.endm							\n");
@@ -106,46 +36,14 @@ static inline void arch_local_irq_disable(void)
 		: "memory");
 }
 
-__asm__(
-	"	.macro	arch_local_save_flags flags			\n"
-	"	.set	push						\n"
-	"	.set	reorder						\n"
-#ifdef CONFIG_MIPS_MT_SMTC
-	"	mfc0	\\flags, $2, 1					\n"
-#else
-	"	mfc0	\\flags, $12					\n"
-#endif
-	"	.set	pop						\n"
-	"	.endm							\n");
-
-static inline unsigned long arch_local_save_flags(void)
-{
-	unsigned long flags;
-	asm volatile("arch_local_save_flags %0" : "=r" (flags));
-	return flags;
-}
 
 __asm__(
 	"	.macro	arch_local_irq_save result			\n"
 	"	.set	push						\n"
 	"	.set	reorder						\n"
 	"	.set	noat						\n"
-#ifdef CONFIG_MIPS_MT_SMTC
-	"	mfc0	\\result, $2, 1					\n"
-	"	ori	$1, \\result, 0x400				\n"
-	"	.set	noreorder					\n"
-	"	mtc0	$1, $2, 1					\n"
-	"	andi	\\result, \\result, 0x400			\n"
-#elif defined(CONFIG_CPU_MIPSR2)
 	"	di	\\result					\n"
 	"	andi	\\result, 1					\n"
-#else
-	"	mfc0	\\result, $12					\n"
-	"	ori	$1, \\result, 0x1f				\n"
-	"	xori	$1, 0x1f					\n"
-	"	.set	noreorder					\n"
-	"	mtc0	$1, $12						\n"
-#endif
 	"	irq_disable_hazard					\n"
 	"	.set	pop						\n"
 	"	.endm							\n");
@@ -160,61 +58,37 @@ static inline unsigned long arch_local_irq_save(void)
 	return flags;
 }
 
+
 __asm__(
 	"	.macro	arch_local_irq_restore flags			\n"
 	"	.set	push						\n"
 	"	.set	noreorder					\n"
 	"	.set	noat						\n"
-#ifdef CONFIG_MIPS_MT_SMTC
-	"mfc0	$1, $2, 1						\n"
-	"andi	\\flags, 0x400						\n"
-	"ori	$1, 0x400						\n"
-	"xori	$1, 0x400						\n"
-	"or	\\flags, $1						\n"
-	"mtc0	\\flags, $2, 1						\n"
-#elif defined(CONFIG_CPU_MIPSR2) && defined(CONFIG_IRQ_CPU)
+#if defined(CONFIG_IRQ_CPU)
 	/*
 	 * Slow, but doesn't suffer from a relatively unlikely race
 	 * condition we're having since days 1.
 	 */
 	"	beqz	\\flags, 1f					\n"
-	"	 di							\n"
+	"	di							\n"
 	"	ei							\n"
 	"1:								\n"
-#elif defined(CONFIG_CPU_MIPSR2)
+#else
 	/*
 	 * Fast, dangerous.  Life is fun, life is good.
 	 */
 	"	mfc0	$1, $12						\n"
 	"	ins	$1, \\flags, 0, 1				\n"
 	"	mtc0	$1, $12						\n"
-#else
-	"	mfc0	$1, $12						\n"
-	"	andi	\\flags, 1					\n"
-	"	ori	$1, 0x1f					\n"
-	"	xori	$1, 0x1f					\n"
-	"	or	\\flags, $1					\n"
-	"	mtc0	\\flags, $12					\n"
 #endif
 	"	irq_disable_hazard					\n"
 	"	.set	pop						\n"
 	"	.endm							\n");
 
-
 static inline void arch_local_irq_restore(unsigned long flags)
 {
 	unsigned long __tmp1;
 
-#ifdef CONFIG_MIPS_MT_SMTC
-	/*
-	 * SMTC kernel needs to do a software replay of queued
-	 * IPIs, at the cost of branch and call overhead on each
-	 * local_irq_restore()
-	 */
-	if (unlikely(!(flags & 0x0400)))
-		smtc_ipi_replay();
-#endif
-
 	__asm__ __volatile__(
 		"arch_local_irq_restore\t%0"
 		: "=r" (__tmp1)
@@ -232,6 +106,75 @@ static inline void __arch_local_irq_restore(unsigned long flags)
 		: "0" (flags)
 		: "memory");
 }
+#else
+/* Functions that require preempt_{dis,en}able() are in mips-atomic.c */
+void arch_local_irq_disable(void);
+unsigned long arch_local_irq_save(void);
+void arch_local_irq_restore(unsigned long flags);
+void __arch_local_irq_restore(unsigned long flags);
+#endif /* if defined(CONFIG_CPU_MIPSR2) && !defined(CONFIG_MIPS_MT_SMTC) */
+
+
+__asm__(
+	"	.macro	arch_local_irq_enable				\n"
+	"	.set	push						\n"
+	"	.set	reorder						\n"
+	"	.set	noat						\n"
+#ifdef CONFIG_MIPS_MT_SMTC
+	"	mfc0	$1, $2, 1	# SMTC - clear TCStatus.IXMT	\n"
+	"	ori	$1, 0x400					\n"
+	"	xori	$1, 0x400					\n"
+	"	mtc0	$1, $2, 1					\n"
+#elif defined(CONFIG_CPU_MIPSR2)
+	"	ei							\n"
+#else
+	"	mfc0	$1,$12						\n"
+	"	ori	$1,0x1f						\n"
+	"	xori	$1,0x1e						\n"
+	"	mtc0	$1,$12						\n"
+#endif
+	"	irq_enable_hazard					\n"
+	"	.set	pop						\n"
+	"	.endm");
+
+extern void smtc_ipi_replay(void);
+
+static inline void arch_local_irq_enable(void)
+{
+#ifdef CONFIG_MIPS_MT_SMTC
+	/*
+	 * SMTC kernel needs to do a software replay of queued
+	 * IPIs, at the cost of call overhead on each local_irq_enable()
+	 */
+	smtc_ipi_replay();
+#endif
+	__asm__ __volatile__(
+		"arch_local_irq_enable"
+		: /* no outputs */
+		: /* no inputs */
+		: "memory");
+}
+
+
+__asm__(
+	"	.macro	arch_local_save_flags flags			\n"
+	"	.set	push						\n"
+	"	.set	reorder						\n"
+#ifdef CONFIG_MIPS_MT_SMTC
+	"	mfc0	\\flags, $2, 1					\n"
+#else
+	"	mfc0	\\flags, $12					\n"
+#endif
+	"	.set	pop						\n"
+	"	.endm							\n");
+
+static inline unsigned long arch_local_save_flags(void)
+{
+	unsigned long flags;
+	asm volatile("arch_local_save_flags %0" : "=r" (flags));
+	return flags;
+}
+
 
 static inline int arch_irqs_disabled_flags(unsigned long flags)
 {
@@ -245,7 +188,7 @@ static inline int arch_irqs_disabled_flags(unsigned long flags)
 #endif
 }
 
-#endif
+#endif /* #ifndef __ASSEMBLY__ */
 
 /*
  * Do the CPU's IRQ-state tracing from assembly code.
diff --git a/arch/mips/include/asm/thread_info.h b/arch/mips/include/asm/thread_info.h
index 8debe9e91754..18806a52061c 100644
--- a/arch/mips/include/asm/thread_info.h
+++ b/arch/mips/include/asm/thread_info.h
@@ -112,12 +112,6 @@ register struct thread_info *__current_thread_info __asm__("$28");
 #define TIF_LOAD_WATCH		25	/* If set, load watch registers */
 #define TIF_SYSCALL_TRACE	31	/* syscall trace active */
 
-#ifdef CONFIG_MIPS32_O32
-#define TIF_32BIT TIF_32BIT_REGS
-#elif defined(CONFIG_MIPS32_N32)
-#define TIF_32BIT _TIF_32BIT_ADDR
-#endif /* CONFIG_MIPS32_O32 */
-
 #define _TIF_SYSCALL_TRACE	(1<<TIF_SYSCALL_TRACE)
 #define _TIF_SIGPENDING		(1<<TIF_SIGPENDING)
 #define _TIF_NEED_RESCHED	(1<<TIF_NEED_RESCHED)