Merge branch 'linus' into perf/urgent

Merge back Linus's latest branch so that we pick up the uprobes changes.

( I tested this branch locally and while it's one from the middle of the
  merge window it's a good one to base further work off. )

Signed-off-by: Ingo Molnar <mingo@kernel.org>

7 files changed, 45 insertions, 72 deletions

diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index ac22dc7f4cab..0bf44231aaf9 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -22,6 +22,7 @@ config MICROBLAZE
 	select GENERIC_PCI_IOMAP
 	select GENERIC_CPU_DEVICES
 	select GENERIC_ATOMIC64
+	select GENERIC_CLOCKEVENTS
 
 config SWAP
 	def_bool n
@@ -50,14 +51,8 @@ config GENERIC_HWEIGHT
 config GENERIC_CALIBRATE_DELAY
 	def_bool y
 
-config GENERIC_TIME_VSYSCALL
-	def_bool n
-
-config GENERIC_CLOCKEVENTS
-	def_bool y
-
 config GENERIC_GPIO
-	def_bool y
+	bool
 
 config GENERIC_CSUM
 	def_bool y
@@ -79,8 +74,6 @@ source "arch/microblaze/platform/Kconfig.platform"
 
 menu "Processor type and features"
 
-source "kernel/time/Kconfig"
-
 source "kernel/Kconfig.preempt"
 
 source "kernel/Kconfig.hz"
diff --git a/arch/microblaze/include/asm/gpio.h b/arch/microblaze/include/asm/gpio.h
index 2b2c18be71c6..b3799d88ffcf 100644
--- a/arch/microblaze/include/asm/gpio.h
+++ b/arch/microblaze/include/asm/gpio.h
@@ -1,53 +1,4 @@
-/*
- * Generic GPIO API implementation for PowerPC.
- *
- * Copyright (c) 2007-2008  MontaVista Software, Inc.
- *
- * Author: Anton Vorontsov <avorontsov@ru.mvista.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#ifndef _ASM_MICROBLAZE_GPIO_H
-#define _ASM_MICROBLAZE_GPIO_H
-
-#include <linux/errno.h>
-#include <asm-generic/gpio.h>
-
-#ifdef CONFIG_GPIOLIB
-
-/*
- * We don't (yet) implement inlined/rapid versions for on-chip gpios.
- * Just call gpiolib.
- */
-static inline int gpio_get_value(unsigned int gpio)
-{
-	return __gpio_get_value(gpio);
-}
-
-static inline void gpio_set_value(unsigned int gpio, int value)
-{
-	__gpio_set_value(gpio, value);
-}
-
-static inline int gpio_cansleep(unsigned int gpio)
-{
-	return __gpio_cansleep(gpio);
-}
-
-static inline int gpio_to_irq(unsigned int gpio)
-{
-	return __gpio_to_irq(gpio);
-}
-
-static inline int irq_to_gpio(unsigned int irq)
-{
-	return -EINVAL;
-}
-
-#endif /* CONFIG_GPIOLIB */
-
-#endif /* _ASM_MICROBLAZE_GPIO_H */
+#ifndef __LINUX_GPIO_H
+#warning Include linux/gpio.h instead of asm/gpio.h
+#include <linux/gpio.h>
+#endif
diff --git a/arch/microblaze/include/asm/kvm_para.h b/arch/microblaze/include/asm/kvm_para.h
new file mode 100644
index 000000000000..14fab8f0b957
--- /dev/null
+++ b/arch/microblaze/include/asm/kvm_para.h
@@ -0,0 +1 @@
+#include <asm-generic/kvm_para.h>
diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S
index daff9e5e4a1f..03f7b8ce6b6b 100644
--- a/arch/microblaze/kernel/entry.S
+++ b/arch/microblaze/kernel/entry.S
@@ -492,10 +492,11 @@ C_ENTRY(sys_clone):
 	bnei	r6, 1f;			/* See if child SP arg (arg 1) is 0. */
 	lwi	r6, r1, PT_R1;	/* If so, use paret's stack ptr */
 1:	addik	r7, r1, 0;			/* Arg 2: parent context */
-	add	r8, r0, r0;			/* Arg 3: (unused) */
-	add	r9, r0, r0;			/* Arg 4: (unused) */
+	lwi     r9, r1, PT_R8;          /* parent tid.  */
+	lwi     r10, r1, PT_R9;         /* child tid.  */
+	/* do_fork will pick up TLS from regs->r10.  */
 	brid	do_fork		/* Do real work (tail-call) */
-	add	r10, r0, r0;			/* Arg 5: (unused) */
+	add     r8, r0, r0;             /* Arg 3: (unused) */
 
 C_ENTRY(sys_execve):
 	brid	microblaze_execve;	/* Do real work (tail-call).*/
diff --git a/arch/microblaze/kernel/mcount.S b/arch/microblaze/kernel/mcount.S
index e7eaa7a8cbd3..fc1e1322ce4c 100644
--- a/arch/microblaze/kernel/mcount.S
+++ b/arch/microblaze/kernel/mcount.S
@@ -138,7 +138,7 @@ NOALIGN_ENTRY(ftrace_call)
 #endif /* CONFIG_DYNAMIC_FTRACE */
 /* static normal trace */
 	lwi	r6, r1, 120; /* MS: load parent addr */
-	addik	r5, r15, 0; /* MS: load current function addr */
+	addik	r5, r15, -4; /* MS: load current function addr */
 	/* MS: here is dependency on previous code */
 	brald	r15, r20; /* MS: jump to ftrace handler */
 	nop;
diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c
index 883b92789cdf..1944e00f07e1 100644
--- a/arch/microblaze/kernel/process.c
+++ b/arch/microblaze/kernel/process.c
@@ -182,8 +182,12 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
 #endif
 	ti->cpu_context.r15 = (unsigned long)ret_from_fork - 8;
 
+	/*
+	 *  r21 is the thread reg, r10 is 6th arg to clone
+	 *  which contains TLS area
+	 */
 	if (clone_flags & CLONE_SETTLS)
-		;
+		childregs->r21 = childregs->r10;
 
 	return 0;
 }
diff --git a/arch/microblaze/mm/fault.c b/arch/microblaze/mm/fault.c
index c38a265846de..eb365d6795fa 100644
--- a/arch/microblaze/mm/fault.c
+++ b/arch/microblaze/mm/fault.c
@@ -92,6 +92,8 @@ void do_page_fault(struct pt_regs *regs, unsigned long address,
 	int code = SEGV_MAPERR;
 	int is_write = error_code & ESR_S;
 	int fault;
+	unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE |
+					 (is_write ? FAULT_FLAG_WRITE : 0);
 
 	regs->ear = address;
 	regs->esr = error_code;
@@ -138,6 +140,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long address,
 		if (kernel_mode(regs) && !search_exception_tables(regs->pc))
 			goto bad_area_nosemaphore;
 
+retry:
 		down_read(&mm->mmap_sem);
 	}
 
@@ -210,7 +213,11 @@ good_area:
 	 * make sure we exit gracefully rather than endlessly redo
 	 * the fault.
 	 */
-	fault = handle_mm_fault(mm, vma, address, is_write ? FAULT_FLAG_WRITE : 0);
+	fault = handle_mm_fault(mm, vma, address, flags);
+
+	if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current))
+		return;
+
 	if (unlikely(fault & VM_FAULT_ERROR)) {
 		if (fault & VM_FAULT_OOM)
 			goto out_of_memory;
@@ -218,11 +225,27 @@ good_area:
 			goto do_sigbus;
 		BUG();
 	}
-	if (unlikely(fault & VM_FAULT_MAJOR))
-		current->maj_flt++;
-	else
-		current->min_flt++;
+
+	if (flags & FAULT_FLAG_ALLOW_RETRY) {
+		if (unlikely(fault & VM_FAULT_MAJOR))
+			current->maj_flt++;
+		else
+			current->min_flt++;
+		if (fault & VM_FAULT_RETRY) {
+			flags &= ~FAULT_FLAG_ALLOW_RETRY;
+
+			/*
+			 * No need to up_read(&mm->mmap_sem) as we would
+			 * have already released it in __lock_page_or_retry
+			 * in mm/filemap.c.
+			 */
+
+			goto retry;
+		}
+	}
+
 	up_read(&mm->mmap_sem);
+
 	/*
 	 * keep track of tlb+htab misses that are good addrs but
 	 * just need pte's created via handle_mm_fault()