Merge commit 'v3.5-rc5' into next

22 files changed, 62 insertions, 192 deletions

diff --git a/arch/xtensa/Makefile b/arch/xtensa/Makefile
index 7608559de93a..f973754ddf90 100644
--- a/arch/xtensa/Makefile
+++ b/arch/xtensa/Makefile
@@ -68,8 +68,8 @@ endif
 
 # Only build variant and/or platform if it includes a Makefile
 
-buildvar := $(shell test -a $(srctree)/arch/xtensa/variants/$(VARIANT)/Makefile && echo arch/xtensa/variants/$(VARIANT)/)
-buildplf := $(shell test -a $(srctree)/arch/xtensa/platforms/$(PLATFORM)/Makefile && echo arch/xtensa/platforms/$(PLATFORM)/)
+buildvar := $(shell test -e $(srctree)/arch/xtensa/variants/$(VARIANT)/Makefile && echo arch/xtensa/variants/$(VARIANT)/)
+buildplf := $(shell test -e $(srctree)/arch/xtensa/platforms/$(PLATFORM)/Makefile && echo arch/xtensa/platforms/$(PLATFORM)/)
 
 # Find libgcc.a
 
diff --git a/arch/xtensa/configs/common_defconfig b/arch/xtensa/configs/common_defconfig
index b90038e40dd3..a182a4e6d688 100644
--- a/arch/xtensa/configs/common_defconfig
+++ b/arch/xtensa/configs/common_defconfig
@@ -333,11 +333,6 @@ CONFIG_XT2000_SONIC=y
 # CONFIG_S2IO is not set
 
 #
-# Token Ring devices
-#
-# CONFIG_TR is not set
-
-#
 # Wireless LAN (non-hamradio)
 #
 CONFIG_NET_RADIO=y
diff --git a/arch/xtensa/include/asm/gpio.h b/arch/xtensa/include/asm/gpio.h
index a8c9fc46c790..b3799d88ffcf 100644
--- a/arch/xtensa/include/asm/gpio.h
+++ b/arch/xtensa/include/asm/gpio.h
@@ -1,56 +1,4 @@
-/*
- * Generic GPIO API implementation for xtensa.
- *
- * Stolen from x86, which is derived from the generic GPIO API 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_XTENSA_GPIO_H
-#define _ASM_XTENSA_GPIO_H
-
-#include <asm-generic/gpio.h>
-
-#ifdef CONFIG_GPIOLIB
-
-/*
- * 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);
-}
-
-/*
- * Not implemented, yet.
- */
-static inline int irq_to_gpio(unsigned int irq)
-{
-	return -EINVAL;
-}
-
-#endif /* CONFIG_GPIOLIB */
-
-#endif /* _ASM_XTENSA_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/xtensa/include/asm/hardirq.h b/arch/xtensa/include/asm/hardirq.h
index 26664cef8f11..91695a135498 100644
--- a/arch/xtensa/include/asm/hardirq.h
+++ b/arch/xtensa/include/asm/hardirq.h
@@ -11,9 +11,6 @@
 #ifndef _XTENSA_HARDIRQ_H
 #define _XTENSA_HARDIRQ_H
 
-void ack_bad_irq(unsigned int irq);
-#define ack_bad_irq ack_bad_irq
-
 #include <asm-generic/hardirq.h>
 
 #endif	/* _XTENSA_HARDIRQ_H */
diff --git a/arch/xtensa/include/asm/io.h b/arch/xtensa/include/asm/io.h
index d04cd3a625fa..4beb43c087d3 100644
--- a/arch/xtensa/include/asm/io.h
+++ b/arch/xtensa/include/asm/io.h
@@ -14,6 +14,7 @@
 #ifdef __KERNEL__
 #include <asm/byteorder.h>
 #include <asm/page.h>
+#include <linux/bug.h>
 #include <linux/kernel.h>
 
 #include <linux/types.h>
diff --git a/arch/xtensa/include/asm/kvm_para.h b/arch/xtensa/include/asm/kvm_para.h
new file mode 100644
index 000000000000..14fab8f0b957
--- /dev/null
+++ b/arch/xtensa/include/asm/kvm_para.h
@@ -0,0 +1 @@
+#include <asm-generic/kvm_para.h>
diff --git a/arch/xtensa/include/asm/processor.h b/arch/xtensa/include/asm/processor.h
index 3acb26e8dead..5c371d8d4528 100644
--- a/arch/xtensa/include/asm/processor.h
+++ b/arch/xtensa/include/asm/processor.h
@@ -168,9 +168,6 @@ struct mm_struct;
 /* Free all resources held by a thread. */
 #define release_thread(thread) do { } while(0)
 
-/* Prepare to copy thread state - unlazy all lazy status */
-extern void prepare_to_copy(struct task_struct*);
-
 /* Create a kernel thread without removing it from tasklists */
 extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
 
diff --git a/arch/xtensa/include/asm/signal.h b/arch/xtensa/include/asm/signal.h
index 633ba73bc4d2..7f201b9d4195 100644
--- a/arch/xtensa/include/asm/signal.h
+++ b/arch/xtensa/include/asm/signal.h
@@ -120,13 +120,6 @@ typedef void (*__sighandler_t)(int);
 #define SIG_ERR	((__sighandler_t)-1)	/* error return from signal */
 
 #ifdef __KERNEL__
-struct old_sigaction {
-	__sighandler_t sa_handler;
-	old_sigset_t sa_mask;
-	unsigned long sa_flags;
-	void (*sa_restorer)(void);
-};
-
 struct sigaction {
 	__sighandler_t sa_handler;
 	unsigned long sa_flags;
diff --git a/arch/xtensa/include/asm/syscall.h b/arch/xtensa/include/asm/syscall.h
index efcf33b92e4c..c1dacca312f3 100644
--- a/arch/xtensa/include/asm/syscall.h
+++ b/arch/xtensa/include/asm/syscall.h
@@ -15,10 +15,6 @@ asmlinkage long xtensa_clone(unsigned long, unsigned long, struct pt_regs*);
 asmlinkage long xtensa_ptrace(long, long, long, long);
 asmlinkage long xtensa_sigreturn(struct pt_regs*);
 asmlinkage long xtensa_rt_sigreturn(struct pt_regs*);
-asmlinkage long xtensa_sigsuspend(struct pt_regs*);
-asmlinkage long xtensa_rt_sigsuspend(struct pt_regs*);
-asmlinkage long xtensa_sigaction(int, const struct old_sigaction*,
-				 struct old_sigaction*);
 asmlinkage long xtensa_sigaltstack(struct pt_regs *regs);
 asmlinkage long sys_rt_sigaction(int,
 				 const struct sigaction __user *,
@@ -35,5 +31,5 @@ asmlinkage long sys_pselect6(int n, fd_set __user *inp, fd_set __user *outp,
 asmlinkage long sys_ppoll(struct pollfd __user *ufds, unsigned int nfds,
 	struct timespec __user *tsp, const sigset_t __user *sigmask,
 	size_t sigsetsize);
-
-
+asmlinkage long sys_rt_sigsuspend(sigset_t __user *unewset,
+		size_t sigsetsize);
diff --git a/arch/xtensa/include/asm/thread_info.h b/arch/xtensa/include/asm/thread_info.h
index 6abbedd09d85..81abfd5d01ac 100644
--- a/arch/xtensa/include/asm/thread_info.h
+++ b/arch/xtensa/include/asm/thread_info.h
@@ -131,6 +131,7 @@ static inline struct thread_info *current_thread_info(void)
 #define TIF_IRET		4	/* return with iret */
 #define TIF_MEMDIE		5	/* is terminating due to OOM killer */
 #define TIF_RESTORE_SIGMASK	6	/* restore signal mask in do_signal() */
+#define TIF_NOTIFY_RESUME	7	/* callback before returning to user */
 #define TIF_POLLING_NRFLAG	16	/* true if poll_idle() is polling TIF_NEED_RESCHED */
 
 #define _TIF_SYSCALL_TRACE	(1<<TIF_SYSCALL_TRACE)
diff --git a/arch/xtensa/include/asm/unistd.h b/arch/xtensa/include/asm/unistd.h
index 798ee6d285a1..bc7e005faa60 100644
--- a/arch/xtensa/include/asm/unistd.h
+++ b/arch/xtensa/include/asm/unistd.h
@@ -507,7 +507,7 @@ __SYSCALL(229, sys_rt_sigtimedwait, 4)
 #define __NR_rt_sigqueueinfo 			230
 __SYSCALL(230, sys_rt_sigqueueinfo, 3)
 #define __NR_rt_sigsuspend 			231
-__SYSCALL(231, xtensa_rt_sigsuspend, 2)
+__SYSCALL(231, sys_rt_sigsuspend, 2)
 
 /* Message */
 
diff --git a/arch/xtensa/kernel/Makefile b/arch/xtensa/kernel/Makefile
index 2d2728b3e862..59fc3fe15572 100644
--- a/arch/xtensa/kernel/Makefile
+++ b/arch/xtensa/kernel/Makefile
@@ -6,7 +6,7 @@ extra-y := head.o vmlinux.lds
 
 obj-y := align.o entry.o irq.o coprocessor.o process.o ptrace.o \
 	 setup.o signal.o syscall.o time.o traps.o vectors.o platform.o  \
-	 pci-dma.o init_task.o io.o
+	 pci-dma.o io.o
 
 obj-$(CONFIG_KGDB) += xtensa-stub.o
 obj-$(CONFIG_PCI) += pci.o
diff --git a/arch/xtensa/kernel/entry.S b/arch/xtensa/kernel/entry.S
index 6223f3346b5c..7e6236073397 100644
--- a/arch/xtensa/kernel/entry.S
+++ b/arch/xtensa/kernel/entry.S
@@ -409,16 +409,16 @@ common_exception_return:
 	l32i	a4, a2, TI_FLAGS
 
 	_bbsi.l	a4, TIF_NEED_RESCHED, 3f
+	_bbsi.l	a4, TIF_NOTIFY_RESUME, 2f
 	_bbci.l	a4, TIF_SIGPENDING, 4f
 
-	l32i	a4, a1, PT_DEPC
+2:	l32i	a4, a1, PT_DEPC
 	bgeui	a4, VALID_DOUBLE_EXCEPTION_ADDRESS, 4f
 
 	/* Call do_signal() */
 
-	movi	a4, do_signal	# int do_signal(struct pt_regs*, sigset_t*)
+	movi	a4, do_notify_resume	# int do_notify_resume(struct pt_regs*)
 	mov	a6, a1
-	movi	a7, 0
 	callx4	a4
 	j	1b
 
diff --git a/arch/xtensa/kernel/init_task.c b/arch/xtensa/kernel/init_task.c
deleted file mode 100644
index cd122fb7e48a..000000000000
--- a/arch/xtensa/kernel/init_task.c
+++ /dev/null
@@ -1,31 +0,0 @@
-/*
- * arch/xtensa/kernel/init_task.c
- *
- * Xtensa Processor version.
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2007 Tensilica Inc.
- *
- * Chris Zankel <chris@zankel.net>
- */
-
-#include <linux/mm.h>
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/init_task.h>
-#include <linux/module.h>
-#include <linux/mqueue.h>
-
-#include <asm/uaccess.h>
-
-static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
-static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
-union thread_union init_thread_union __init_task_data =
-	{ INIT_THREAD_INFO(init_task) };
-
-struct task_struct init_task = INIT_TASK(init_task);
-
-EXPORT_SYMBOL(init_task);
diff --git a/arch/xtensa/kernel/process.c b/arch/xtensa/kernel/process.c
index 6a2d6edf8f72..9b306e550e3f 100644
--- a/arch/xtensa/kernel/process.c
+++ b/arch/xtensa/kernel/process.c
@@ -140,13 +140,16 @@ void flush_thread(void)
 }
 
 /*
- * This is called before the thread is copied. 
+ * this gets called so that we can store coprocessor state into memory and
+ * copy the current task into the new thread.
  */
-void prepare_to_copy(struct task_struct *tsk)
+int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
 {
 #if XTENSA_HAVE_COPROCESSORS
-	coprocessor_flush_all(task_thread_info(tsk));
+	coprocessor_flush_all(task_thread_info(src));
 #endif
+	*dst = *src;
+	return 0;
 }
 
 /*
diff --git a/arch/xtensa/kernel/signal.c b/arch/xtensa/kernel/signal.c
index b69b000349fc..efe4e854b3cd 100644
--- a/arch/xtensa/kernel/signal.c
+++ b/arch/xtensa/kernel/signal.c
@@ -20,6 +20,7 @@
 #include <linux/ptrace.h>
 #include <linux/personality.h>
 #include <linux/freezer.h>
+#include <linux/tracehook.h>
 
 #include <asm/ucontext.h>
 #include <asm/uaccess.h>
@@ -29,10 +30,6 @@
 
 #define DEBUG_SIG  0
 
-#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
-
-asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset);
-
 extern struct task_struct *coproc_owners[];
 
 struct rt_sigframe
@@ -248,6 +245,9 @@ asmlinkage long xtensa_rt_sigreturn(long a0, long a1, long a2, long a3,
 	sigset_t set;
 	int ret;
 
+	/* Always make any pending restarted system calls return -EINTR */
+	current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
 	if (regs->depc > 64)
 		panic("rt_sigreturn in double exception!\n");
 
@@ -259,7 +259,6 @@ asmlinkage long xtensa_rt_sigreturn(long a0, long a1, long a2, long a3,
 	if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
 		goto badframe;
 
-	sigdelsetmask(&set, ~_BLOCKABLE);
 	set_current_blocked(&set);
 
 	if (restore_sigcontext(regs, frame))
@@ -426,37 +425,6 @@ give_sigsegv:
 	return -EFAULT;
 }
 
-/*
- * Atomically swap in the new signal mask, and wait for a signal.
- */
-
-asmlinkage long xtensa_rt_sigsuspend(sigset_t __user *unewset, 
-    				     size_t sigsetsize,
-    				     long a2, long a3, long a4, long a5, 
-				     struct pt_regs *regs)
-{
-	sigset_t saveset, newset;
-
-	/* XXX: Don't preclude handling different sized sigset_t's.  */
-	if (sigsetsize != sizeof(sigset_t))
-		return -EINVAL;
-
-	if (copy_from_user(&newset, unewset, sizeof(newset)))
-		return -EFAULT;
-
-	sigdelsetmask(&newset, ~_BLOCKABLE);
-	saveset = current->blocked;
-	set_current_blocked(&newset);
-
-	regs->areg[2] = -EINTR;
-	while (1) {
-		current->state = TASK_INTERRUPTIBLE;
-		schedule();
-		if (do_signal(regs, &saveset))
-			return -EINTR;
-	}
-}
-
 asmlinkage long xtensa_sigaltstack(const stack_t __user *uss, 
 				   stack_t __user *uoss,
     				   long a2, long a3, long a4, long a5,
@@ -476,26 +444,18 @@ asmlinkage long xtensa_sigaltstack(const stack_t __user *uss,
  * the kernel can handle, and then we build all the user-level signal handling
  * stack-frames in one go after that.
  */
-int do_signal(struct pt_regs *regs, sigset_t *oldset)
+static void do_signal(struct pt_regs *regs)
 {
 	siginfo_t info;
 	int signr;
 	struct k_sigaction ka;
 
-	if (!user_mode(regs))
-		return 0;
-
-	if (try_to_freeze())
-		goto no_signal;
-
-	if (!oldset)
-		oldset = &current->blocked;
-
 	task_pt_regs(current)->icountlevel = 0;
 
 	signr = get_signal_to_deliver(&info, &ka, regs, NULL);
 
 	if (signr > 0) {
+		int ret;
 
 		/* Are we from a system call? */
 
@@ -529,18 +489,17 @@ int do_signal(struct pt_regs *regs, sigset_t *oldset)
 
 		/* Whee!  Actually deliver the signal.  */
 		/* Set up the stack frame */
-		ret = setup_frame(signr, &ka, &info, oldset, regs);
+		ret = setup_frame(signr, &ka, &info, sigmask_to_save(), regs);
 		if (ret)
-			return ret;
+			return;
 
-		block_sigmask(&ka, signr);
+		signal_delivered(signr, &info, &ka, regs, 0);
 		if (current->ptrace & PT_SINGLESTEP)
 			task_pt_regs(current)->icountlevel = 1;
 
-		return 1;
+		return;
 	}
 
-no_signal:
 	/* Did we come from a system call? */
 	if ((signed) regs->syscall >= 0) {
 		/* Restart the system call - no handlers present */
@@ -557,8 +516,23 @@ no_signal:
 			break;
 		}
 	}
+
+	/* If there's no signal to deliver, we just restore the saved mask.  */
+	restore_saved_sigmask();
+
 	if (current->ptrace & PT_SINGLESTEP)
 		task_pt_regs(current)->icountlevel = 1;
-	return 0;
+	return;
 }
 
+void do_notify_resume(struct pt_regs *regs)
+{
+	if (!user_mode(regs))
+		return;
+
+	if (test_thread_flag(TIF_SIGPENDING))
+		do_signal(regs);
+
+	if (test_and_clear_thread_flag(TIF_NOTIFY_RESUME))
+		tracehook_notify_resume(regs);
+}
diff --git a/arch/xtensa/kernel/vmlinux.lds.S b/arch/xtensa/kernel/vmlinux.lds.S
index 88ecea3facb4..ee2e2089483d 100644
--- a/arch/xtensa/kernel/vmlinux.lds.S
+++ b/arch/xtensa/kernel/vmlinux.lds.S
@@ -83,7 +83,6 @@ SECTIONS
 
   _text = .;
   _stext = .;
-  _ftext = .;
 
   .text :
   {
@@ -112,7 +111,7 @@ SECTIONS
   EXCEPTION_TABLE(16)
   /* Data section */
 
-  _fdata = .;
+  _sdata = .;
   RW_DATA_SECTION(XCHAL_ICACHE_LINESIZE, PAGE_SIZE, THREAD_SIZE)
   _edata = .;
 
diff --git a/arch/xtensa/mm/init.c b/arch/xtensa/mm/init.c
index ba150e5de2eb..db955179da2d 100644
--- a/arch/xtensa/mm/init.c
+++ b/arch/xtensa/mm/init.c
@@ -26,11 +26,7 @@
 
 #include <asm/bootparam.h>
 #include <asm/page.h>
-
-/* References to section boundaries */
-
-extern char _ftext, _etext, _fdata, _edata, _rodata_end;
-extern char __init_begin, __init_end;
+#include <asm/sections.h>
 
 /*
  * mem_reserve(start, end, must_exist)
@@ -197,9 +193,9 @@ void __init mem_init(void)
 			reservedpages++;
 	}
 
-	codesize =  (unsigned long) &_etext - (unsigned long) &_ftext;
-	datasize =  (unsigned long) &_edata - (unsigned long) &_fdata;
-	initsize =  (unsigned long) &__init_end - (unsigned long) &__init_begin;
+	codesize =  (unsigned long) _etext - (unsigned long) _stext;
+	datasize =  (unsigned long) _edata - (unsigned long) _sdata;
+	initsize =  (unsigned long) __init_end - (unsigned long) __init_begin;
 
 	printk("Memory: %luk/%luk available (%ldk kernel code, %ldk reserved, "
 	       "%ldk data, %ldk init %ldk highmem)\n",
@@ -237,7 +233,7 @@ void free_initrd_mem(unsigned long start, unsigned long end)
 
 void free_initmem(void)
 {
-	free_reserved_mem(&__init_begin, &__init_end);
-	printk("Freeing unused kernel memory: %dk freed\n",
-	       (&__init_end - &__init_begin) >> 10);
+	free_reserved_mem(__init_begin, __init_end);
+	printk("Freeing unused kernel memory: %zuk freed\n",
+	       (__init_end - __init_begin) >> 10);
 }
diff --git a/arch/xtensa/variants/s6000/dmac.c b/arch/xtensa/variants/s6000/dmac.c
index dc7f7c573518..340f5bb0b5ef 100644
--- a/arch/xtensa/variants/s6000/dmac.c
+++ b/arch/xtensa/variants/s6000/dmac.c
@@ -1,5 +1,5 @@
 /*
- * Authors:	Oskar Schirmer <os@emlix.com>
+ * Authors:	Oskar Schirmer <oskar@scara.com>
  *		Daniel Gloeckner <dg@emlix.com>
  * (c) 2008 emlix GmbH http://www.emlix.com
  *
diff --git a/arch/xtensa/variants/s6000/gpio.c b/arch/xtensa/variants/s6000/gpio.c
index 7af0757e001b..b89541ba39ab 100644
--- a/arch/xtensa/variants/s6000/gpio.c
+++ b/arch/xtensa/variants/s6000/gpio.c
@@ -2,8 +2,8 @@
  * s6000 gpio driver
  *
  * Copyright (c) 2009 emlix GmbH
- * Authors:	Oskar Schirmer <os@emlix.com>
- *		Johannes Weiner <jw@emlix.com>
+ * Authors:	Oskar Schirmer <oskar@scara.com>
+ *		Johannes Weiner <hannes@cmpxchg.org>
  *		Daniel Gloeckner <dg@emlix.com>
  */
 #include <linux/bitops.h>
diff --git a/arch/xtensa/variants/s6000/include/variant/dmac.h b/arch/xtensa/variants/s6000/include/variant/dmac.h
index e81735b2a206..3f88d9fc6897 100644
--- a/arch/xtensa/variants/s6000/include/variant/dmac.h
+++ b/arch/xtensa/variants/s6000/include/variant/dmac.h
@@ -8,7 +8,7 @@
  * Copyright (C) 2006 Tensilica Inc.
  * Copyright (C) 2008 Emlix GmbH <info@emlix.com>
  * Authors:	Fabian Godehardt <fg@emlix.com>
- *		Oskar Schirmer <os@emlix.com>
+ *		Oskar Schirmer <oskar@scara.com>
  *		Daniel Gloeckner <dg@emlix.com>
  */
 
diff --git a/arch/xtensa/variants/s6000/irq.c b/arch/xtensa/variants/s6000/irq.c
index 6651e3285fcf..81a241e79075 100644
--- a/arch/xtensa/variants/s6000/irq.c
+++ b/arch/xtensa/variants/s6000/irq.c
@@ -2,8 +2,8 @@
  * s6000 irq crossbar
  *
  * Copyright (c) 2009 emlix GmbH
- * Authors:	Johannes Weiner <jw@emlix.com>
- *		Oskar Schirmer <os@emlix.com>
+ * Authors:	Johannes Weiner <hannes@cmpxchg.org>
+ *		Oskar Schirmer <oskar@scara.com>
  */
 #include <linux/io.h>
 #include <asm/irq.h>