51 files changed, 725 insertions, 168 deletions

diff --git a/Documentation/power/regulator/overview.txt b/Documentation/power/regulator/overview.txt
index 9363e056188a..8ed17587a74b 100644
--- a/Documentation/power/regulator/overview.txt
+++ b/Documentation/power/regulator/overview.txt
@@ -13,7 +13,7 @@ regulators (where voltage output is controllable) and current sinks (where
 current limit is controllable).
 
 (C) 2008  Wolfson Microelectronics PLC.
-Author: Liam Girdwood <lg@opensource.wolfsonmicro.com>
+Author: Liam Girdwood <lrg@slimlogic.co.uk>
 
 
 Nomenclature
diff --git a/Documentation/workqueue.txt b/Documentation/workqueue.txt
new file mode 100644
index 000000000000..e4498a2872c3
--- /dev/null
+++ b/Documentation/workqueue.txt
@@ -0,0 +1,380 @@
+
+Concurrency Managed Workqueue (cmwq)
+
+September, 2010         Tejun Heo <tj@kernel.org>
+                        Florian Mickler <florian@mickler.org>
+
+CONTENTS
+
+1. Introduction
+2. Why cmwq?
+3. The Design
+4. Application Programming Interface (API)
+5. Example Execution Scenarios
+6. Guidelines
+
+
+1. Introduction
+
+There are many cases where an asynchronous process execution context
+is needed and the workqueue (wq) API is the most commonly used
+mechanism for such cases.
+
+When such an asynchronous execution context is needed, a work item
+describing which function to execute is put on a queue.  An
+independent thread serves as the asynchronous execution context.  The
+queue is called workqueue and the thread is called worker.
+
+While there are work items on the workqueue the worker executes the
+functions associated with the work items one after the other.  When
+there is no work item left on the workqueue the worker becomes idle.
+When a new work item gets queued, the worker begins executing again.
+
+
+2. Why cmwq?
+
+In the original wq implementation, a multi threaded (MT) wq had one
+worker thread per CPU and a single threaded (ST) wq had one worker
+thread system-wide.  A single MT wq needed to keep around the same
+number of workers as the number of CPUs.  The kernel grew a lot of MT
+wq users over the years and with the number of CPU cores continuously
+rising, some systems saturated the default 32k PID space just booting
+up.
+
+Although MT wq wasted a lot of resource, the level of concurrency
+provided was unsatisfactory.  The limitation was common to both ST and
+MT wq albeit less severe on MT.  Each wq maintained its own separate
+worker pool.  A MT wq could provide only one execution context per CPU
+while a ST wq one for the whole system.  Work items had to compete for
+those very limited execution contexts leading to various problems
+including proneness to deadlocks around the single execution context.
+
+The tension between the provided level of concurrency and resource
+usage also forced its users to make unnecessary tradeoffs like libata
+choosing to use ST wq for polling PIOs and accepting an unnecessary
+limitation that no two polling PIOs can progress at the same time.  As
+MT wq don't provide much better concurrency, users which require
+higher level of concurrency, like async or fscache, had to implement
+their own thread pool.
+
+Concurrency Managed Workqueue (cmwq) is a reimplementation of wq with
+focus on the following goals.
+
+* Maintain compatibility with the original workqueue API.
+
+* Use per-CPU unified worker pools shared by all wq to provide
+  flexible level of concurrency on demand without wasting a lot of
+  resource.
+
+* Automatically regulate worker pool and level of concurrency so that
+  the API users don't need to worry about such details.
+
+
+3. The Design
+
+In order to ease the asynchronous execution of functions a new
+abstraction, the work item, is introduced.
+
+A work item is a simple struct that holds a pointer to the function
+that is to be executed asynchronously.  Whenever a driver or subsystem
+wants a function to be executed asynchronously it has to set up a work
+item pointing to that function and queue that work item on a
+workqueue.
+
+Special purpose threads, called worker threads, execute the functions
+off of the queue, one after the other.  If no work is queued, the
+worker threads become idle.  These worker threads are managed in so
+called thread-pools.
+
+The cmwq design differentiates between the user-facing workqueues that
+subsystems and drivers queue work items on and the backend mechanism
+which manages thread-pool and processes the queued work items.
+
+The backend is called gcwq.  There is one gcwq for each possible CPU
+and one gcwq to serve work items queued on unbound workqueues.
+
+Subsystems and drivers can create and queue work items through special
+workqueue API functions as they see fit. They can influence some
+aspects of the way the work items are executed by setting flags on the
+workqueue they are putting the work item on. These flags include
+things like CPU locality, reentrancy, concurrency limits and more. To
+get a detailed overview refer to the API description of
+alloc_workqueue() below.
+
+When a work item is queued to a workqueue, the target gcwq is
+determined according to the queue parameters and workqueue attributes
+and appended on the shared worklist of the gcwq.  For example, unless
+specifically overridden, a work item of a bound workqueue will be
+queued on the worklist of exactly that gcwq that is associated to the
+CPU the issuer is running on.
+
+For any worker pool implementation, managing the concurrency level
+(how many execution contexts are active) is an important issue.  cmwq
+tries to keep the concurrency at a minimal but sufficient level.
+Minimal to save resources and sufficient in that the system is used at
+its full capacity.
+
+Each gcwq bound to an actual CPU implements concurrency management by
+hooking into the scheduler.  The gcwq is notified whenever an active
+worker wakes up or sleeps and keeps track of the number of the
+currently runnable workers.  Generally, work items are not expected to
+hog a CPU and consume many cycles.  That means maintaining just enough
+concurrency to prevent work processing from stalling should be
+optimal.  As long as there are one or more runnable workers on the
+CPU, the gcwq doesn't start execution of a new work, but, when the
+last running worker goes to sleep, it immediately schedules a new
+worker so that the CPU doesn't sit idle while there are pending work
+items.  This allows using a minimal number of workers without losing
+execution bandwidth.
+
+Keeping idle workers around doesn't cost other than the memory space
+for kthreads, so cmwq holds onto idle ones for a while before killing
+them.
+
+For an unbound wq, the above concurrency management doesn't apply and
+the gcwq for the pseudo unbound CPU tries to start executing all work
+items as soon as possible.  The responsibility of regulating
+concurrency level is on the users.  There is also a flag to mark a
+bound wq to ignore the concurrency management.  Please refer to the
+API section for details.
+
+Forward progress guarantee relies on that workers can be created when
+more execution contexts are necessary, which in turn is guaranteed
+through the use of rescue workers.  All work items which might be used
+on code paths that handle memory reclaim are required to be queued on
+wq's that have a rescue-worker reserved for execution under memory
+pressure.  Else it is possible that the thread-pool deadlocks waiting
+for execution contexts to free up.
+
+
+4. Application Programming Interface (API)
+
+alloc_workqueue() allocates a wq.  The original create_*workqueue()
+functions are deprecated and scheduled for removal.  alloc_workqueue()
+takes three arguments - @name, @flags and @max_active.  @name is the
+name of the wq and also used as the name of the rescuer thread if
+there is one.
+
+A wq no longer manages execution resources but serves as a domain for
+forward progress guarantee, flush and work item attributes.  @flags
+and @max_active control how work items are assigned execution
+resources, scheduled and executed.
+
+@flags:
+
+  WQ_NON_REENTRANT
+
+        By default, a wq guarantees non-reentrance only on the same
+        CPU.  A work item may not be executed concurrently on the same
+        CPU by multiple workers but is allowed to be executed
+        concurrently on multiple CPUs.  This flag makes sure
+        non-reentrance is enforced across all CPUs.  Work items queued
+        to a non-reentrant wq are guaranteed to be executed by at most
+        one worker system-wide at any given time.
+
+  WQ_UNBOUND
+
+        Work items queued to an unbound wq are served by a special
+        gcwq which hosts workers which are not bound to any specific
+        CPU.  This makes the wq behave as a simple execution context
+        provider without concurrency management.  The unbound gcwq
+        tries to start execution of work items as soon as possible.
+        Unbound wq sacrifices locality but is useful for the following
+        cases.
+
+        * Wide fluctuation in the concurrency level requirement is
+          expected and using bound wq may end up creating large number
+          of mostly unused workers across different CPUs as the issuer
+          hops through different CPUs.
+
+        * Long running CPU intensive workloads which can be better
+          managed by the system scheduler.
+
+  WQ_FREEZEABLE
+
+        A freezeable wq participates in the freeze phase of the system
+        suspend operations.  Work items on the wq are drained and no
+        new work item starts execution until thawed.
+
+  WQ_RESCUER
+
+        All wq which might be used in the memory reclaim paths _MUST_
+        have this flag set.  This reserves one worker exclusively for
+        the execution of this wq under memory pressure.
+
+  WQ_HIGHPRI
+
+        Work items of a highpri wq are queued at the head of the
+        worklist of the target gcwq and start execution regardless of
+        the current concurrency level.  In other words, highpri work
+        items will always start execution as soon as execution
+        resource is available.
+
+        Ordering among highpri work items is preserved - a highpri
+        work item queued after another highpri work item will start
+        execution after the earlier highpri work item starts.
+
+        Although highpri work items are not held back by other
+        runnable work items, they still contribute to the concurrency
+        level.  Highpri work items in runnable state will prevent
+        non-highpri work items from starting execution.
+
+        This flag is meaningless for unbound wq.
+
+  WQ_CPU_INTENSIVE
+
+        Work items of a CPU intensive wq do not contribute to the
+        concurrency level.  In other words, runnable CPU intensive
+        work items will not prevent other work items from starting
+        execution.  This is useful for bound work items which are
+        expected to hog CPU cycles so that their execution is
+        regulated by the system scheduler.
+
+        Although CPU intensive work items don't contribute to the
+        concurrency level, start of their executions is still
+        regulated by the concurrency management and runnable
+        non-CPU-intensive work items can delay execution of CPU
+        intensive work items.
+
+        This flag is meaningless for unbound wq.
+
+  WQ_HIGHPRI | WQ_CPU_INTENSIVE
+
+        This combination makes the wq avoid interaction with
+        concurrency management completely and behave as a simple
+        per-CPU execution context provider.  Work items queued on a
+        highpri CPU-intensive wq start execution as soon as resources
+        are available and don't affect execution of other work items.
+
+@max_active:
+
+@max_active determines the maximum number of execution contexts per
+CPU which can be assigned to the work items of a wq.  For example,
+with @max_active of 16, at most 16 work items of the wq can be
+executing at the same time per CPU.
+
+Currently, for a bound wq, the maximum limit for @max_active is 512
+and the default value used when 0 is specified is 256.  For an unbound
+wq, the limit is higher of 512 and 4 * num_possible_cpus().  These
+values are chosen sufficiently high such that they are not the
+limiting factor while providing protection in runaway cases.
+
+The number of active work items of a wq is usually regulated by the
+users of the wq, more specifically, by how many work items the users
+may queue at the same time.  Unless there is a specific need for
+throttling the number of active work items, specifying '0' is
+recommended.
+
+Some users depend on the strict execution ordering of ST wq.  The
+combination of @max_active of 1 and WQ_UNBOUND is used to achieve this
+behavior.  Work items on such wq are always queued to the unbound gcwq
+and only one work item can be active at any given time thus achieving
+the same ordering property as ST wq.
+
+
+5. Example Execution Scenarios
+
+The following example execution scenarios try to illustrate how cmwq
+behave under different configurations.
+
+ Work items w0, w1, w2 are queued to a bound wq q0 on the same CPU.
+ w0 burns CPU for 5ms then sleeps for 10ms then burns CPU for 5ms
+ again before finishing.  w1 and w2 burn CPU for 5ms then sleep for
+ 10ms.
+
+Ignoring all other tasks, works and processing overhead, and assuming
+simple FIFO scheduling, the following is one highly simplified version
+of possible sequences of events with the original wq.
+
+ TIME IN MSECS  EVENT
+ 0              w0 starts and burns CPU
+ 5              w0 sleeps
+ 15             w0 wakes up and burns CPU
+ 20             w0 finishes
+ 20             w1 starts and burns CPU
+ 25             w1 sleeps
+ 35             w1 wakes up and finishes
+ 35             w2 starts and burns CPU
+ 40             w2 sleeps
+ 50             w2 wakes up and finishes
+
+And with cmwq with @max_active >= 3,
+
+ TIME IN MSECS  EVENT
+ 0              w0 starts and burns CPU
+ 5              w0 sleeps
+ 5              w1 starts and burns CPU
+ 10             w1 sleeps
+ 10             w2 starts and burns CPU
+ 15             w2 sleeps
+ 15             w0 wakes up and burns CPU
+ 20             w0 finishes
+ 20             w1 wakes up and finishes
+ 25             w2 wakes up and finishes
+
+If @max_active == 2,
+
+ TIME IN MSECS  EVENT
+ 0              w0 starts and burns CPU
+ 5              w0 sleeps
+ 5              w1 starts and burns CPU
+ 10             w1 sleeps
+ 15             w0 wakes up and burns CPU
+ 20             w0 finishes
+ 20             w1 wakes up and finishes
+ 20             w2 starts and burns CPU
+ 25             w2 sleeps
+ 35             w2 wakes up and finishes
+
+Now, let's assume w1 and w2 are queued to a different wq q1 which has
+WQ_HIGHPRI set,
+
+ TIME IN MSECS  EVENT
+ 0              w1 and w2 start and burn CPU
+ 5              w1 sleeps
+ 10             w2 sleeps
+ 10             w0 starts and burns CPU
+ 15             w0 sleeps
+ 15             w1 wakes up and finishes
+ 20             w2 wakes up and finishes
+ 25             w0 wakes up and burns CPU
+ 30             w0 finishes
+
+If q1 has WQ_CPU_INTENSIVE set,
+
+ TIME IN MSECS  EVENT
+ 0              w0 starts and burns CPU
+ 5              w0 sleeps
+ 5              w1 and w2 start and burn CPU
+ 10             w1 sleeps
+ 15             w2 sleeps
+ 15             w0 wakes up and burns CPU
+ 20             w0 finishes
+ 20             w1 wakes up and finishes
+ 25             w2 wakes up and finishes
+
+
+6. Guidelines
+
+* Do not forget to use WQ_RESCUER if a wq may process work items which
+  are used during memory reclaim.  Each wq with WQ_RESCUER set has one
+  rescuer thread reserved for it.  If there is dependency among
+  multiple work items used during memory reclaim, they should be
+  queued to separate wq each with WQ_RESCUER.
+
+* Unless strict ordering is required, there is no need to use ST wq.
+
+* Unless there is a specific need, using 0 for @max_active is
+  recommended.  In most use cases, concurrency level usually stays
+  well under the default limit.
+
+* A wq serves as a domain for forward progress guarantee (WQ_RESCUER),
+  flush and work item attributes.  Work items which are not involved
+  in memory reclaim and don't need to be flushed as a part of a group
+  of work items, and don't require any special attribute, can use one
+  of the system wq.  There is no difference in execution
+  characteristics between using a dedicated wq and a system wq.
+
+* Unless work items are expected to consume a huge amount of CPU
+  cycles, using a bound wq is usually beneficial due to the increased
+  level of locality in wq operations and work item execution.
diff --git a/arch/tile/include/arch/chip_tile64.h b/arch/tile/include/arch/chip_tile64.h
index 1246573be59e..261aaba092d4 100644
--- a/arch/tile/include/arch/chip_tile64.h
+++ b/arch/tile/include/arch/chip_tile64.h
@@ -150,6 +150,9 @@
 /** Is the PROC_STATUS SPR supported? */
 #define CHIP_HAS_PROC_STATUS_SPR() 0
 
+/** Is the DSTREAM_PF SPR supported? */
+#define CHIP_HAS_DSTREAM_PF() 0
+
 /** Log of the number of mshims we have. */
 #define CHIP_LOG_NUM_MSHIMS() 2
 
diff --git a/arch/tile/include/arch/chip_tilepro.h b/arch/tile/include/arch/chip_tilepro.h
index e864c47fc89c..70017699a74c 100644
--- a/arch/tile/include/arch/chip_tilepro.h
+++ b/arch/tile/include/arch/chip_tilepro.h
@@ -150,6 +150,9 @@
 /** Is the PROC_STATUS SPR supported? */
 #define CHIP_HAS_PROC_STATUS_SPR() 1
 
+/** Is the DSTREAM_PF SPR supported? */
+#define CHIP_HAS_DSTREAM_PF() 0
+
 /** Log of the number of mshims we have. */
 #define CHIP_LOG_NUM_MSHIMS() 2
 
diff --git a/arch/tile/include/asm/compat.h b/arch/tile/include/asm/compat.h
index 345d81ce44bb..8b60ec8b2d19 100644
--- a/arch/tile/include/asm/compat.h
+++ b/arch/tile/include/asm/compat.h
@@ -214,8 +214,9 @@ extern int compat_setup_rt_frame(int sig, struct k_sigaction *ka,
 struct compat_sigaction;
 struct compat_siginfo;
 struct compat_sigaltstack;
-long compat_sys_execve(char __user *path, compat_uptr_t __user *argv,
-                       compat_uptr_t __user *envp);
+long compat_sys_execve(const char __user *path,
+                       const compat_uptr_t __user *argv,
+                       const compat_uptr_t __user *envp);
 long compat_sys_rt_sigaction(int sig, struct compat_sigaction __user *act,
                              struct compat_sigaction __user *oact,
                              size_t sigsetsize);
diff --git a/arch/tile/include/asm/io.h b/arch/tile/include/asm/io.h
index 8c95bef3fa45..ee43328713ab 100644
--- a/arch/tile/include/asm/io.h
+++ b/arch/tile/include/asm/io.h
@@ -164,22 +164,22 @@ static inline void _tile_writeq(u64 val, unsigned long addr)
 #define iowrite32 writel
 #define iowrite64 writeq
 
-static inline void *memcpy_fromio(void *dst, void *src, int len)
+static inline void memcpy_fromio(void *dst, const volatile void __iomem *src,
+                                 size_t len)
 {
         int x;
         BUG_ON((unsigned long)src & 0x3);
         for (x = 0; x < len; x += 4)
                 *(u32 *)(dst + x) = readl(src + x);
-        return dst;
 }
 
-static inline void *memcpy_toio(void *dst, void *src, int len)
+static inline void memcpy_toio(volatile void __iomem *dst, const void *src,
+                                size_t len)
 {
         int x;
         BUG_ON((unsigned long)dst & 0x3);
         for (x = 0; x < len; x += 4)
                 writel(*(u32 *)(src + x), dst + x);
-        return dst;
 }
 
 /*
diff --git a/arch/tile/include/asm/processor.h b/arch/tile/include/asm/processor.h
index d942d09b252e..ccd5f8425688 100644
--- a/arch/tile/include/asm/processor.h
+++ b/arch/tile/include/asm/processor.h
@@ -103,6 +103,18 @@ struct thread_struct {
         /* Any other miscellaneous processor state bits */
         unsigned long proc_status;
 #endif
+#if !CHIP_HAS_FIXED_INTVEC_BASE()
+        /* Interrupt base for PL0 interrupts */
+        unsigned long interrupt_vector_base;
+#endif
+#if CHIP_HAS_TILE_RTF_HWM()
+        /* Tile cache retry fifo high-water mark */
+        unsigned long tile_rtf_hwm;
+#endif
+#if CHIP_HAS_DSTREAM_PF()
+        /* Data stream prefetch control */
+        unsigned long dstream_pf;
+#endif
 #ifdef CONFIG_HARDWALL
         /* Is this task tied to an activated hardwall? */
         struct hardwall_info *hardwall;
diff --git a/arch/tile/include/asm/ptrace.h b/arch/tile/include/asm/ptrace.h
index acdae814e016..4a02bb073979 100644
--- a/arch/tile/include/asm/ptrace.h
+++ b/arch/tile/include/asm/ptrace.h
@@ -51,10 +51,7 @@ typedef uint_reg_t pt_reg_t;
 
 /*
  * This struct defines the way the registers are stored on the stack during a
- * system call/exception.  It should be a multiple of 8 bytes to preserve
- * normal stack alignment rules.
- *
- * Must track <sys/ucontext.h> and <sys/procfs.h>
+ * system call or exception.  "struct sigcontext" has the same shape.
  */
 struct pt_regs {
         /* Saved main processor registers; 56..63 are special. */
@@ -80,11 +77,6 @@ struct pt_regs {
 
 #endif /* __ASSEMBLY__ */
 
-/* Flag bits in pt_regs.flags */
-#define PT_FLAGS_DISABLE_IRQ    1  /* on return to kernel, disable irqs */
-#define PT_FLAGS_CALLER_SAVES   2  /* caller-save registers are valid */
-#define PT_FLAGS_RESTORE_REGS   4  /* restore callee-save regs on return */
-
 #define PTRACE_GETREGS          12
 #define PTRACE_SETREGS          13
 #define PTRACE_GETFPREGS        14
@@ -101,6 +93,11 @@ struct pt_regs {
 
 #ifdef __KERNEL__
 
+/* Flag bits in pt_regs.flags */
+#define PT_FLAGS_DISABLE_IRQ    1  /* on return to kernel, disable irqs */
+#define PT_FLAGS_CALLER_SAVES   2  /* caller-save registers are valid */
+#define PT_FLAGS_RESTORE_REGS   4  /* restore callee-save regs on return */
+
 #ifndef __ASSEMBLY__
 
 #define instruction_pointer(regs) ((regs)->pc)
diff --git a/arch/tile/include/asm/sigcontext.h b/arch/tile/include/asm/sigcontext.h
index 7cd7672e3ad4..5e2d03336f53 100644
--- a/arch/tile/include/asm/sigcontext.h
+++ b/arch/tile/include/asm/sigcontext.h
@@ -15,13 +15,21 @@
 #ifndef _ASM_TILE_SIGCONTEXT_H
 #define _ASM_TILE_SIGCONTEXT_H
 
-/* NOTE: we can't include <linux/ptrace.h> due to #include dependencies. */
-#include <asm/ptrace.h>
-
-/* Must track <sys/ucontext.h> */
+#include <arch/abi.h>
 
+/*
+ * struct sigcontext has the same shape as struct pt_regs,
+ * but is simplified since we know the fault is from userspace.
+ */
 struct sigcontext {
-        struct pt_regs regs;
+        uint_reg_t gregs[53];   /* General-purpose registers.  */
+        uint_reg_t tp;          /* Aliases gregs[TREG_TP].  */
+        uint_reg_t sp;          /* Aliases gregs[TREG_SP].  */
+        uint_reg_t lr;          /* Aliases gregs[TREG_LR].  */
+        uint_reg_t pc;          /* Program counter.  */
+        uint_reg_t ics;         /* In Interrupt Critical Section?  */
+        uint_reg_t faultnum;    /* Fault number.  */
+        uint_reg_t pad[5];
 };
 
 #endif /* _ASM_TILE_SIGCONTEXT_H */
diff --git a/arch/tile/include/asm/signal.h b/arch/tile/include/asm/signal.h
index eb0253f32202..c1ee1d61d44c 100644
--- a/arch/tile/include/asm/signal.h
+++ b/arch/tile/include/asm/signal.h
@@ -24,6 +24,7 @@
 #include <asm-generic/signal.h>
 
 #if defined(__KERNEL__) && !defined(__ASSEMBLY__)
+struct pt_regs;
 int restore_sigcontext(struct pt_regs *, struct sigcontext __user *, long *);
 int setup_sigcontext(struct sigcontext __user *, struct pt_regs *);
 void do_signal(struct pt_regs *regs);
diff --git a/arch/tile/include/asm/syscalls.h b/arch/tile/include/asm/syscalls.h
index af165a74537f..ce99ffefeacf 100644
--- a/arch/tile/include/asm/syscalls.h
+++ b/arch/tile/include/asm/syscalls.h
@@ -62,10 +62,12 @@ long sys_fork(void);
 long _sys_fork(struct pt_regs *regs);
 long sys_vfork(void);
 long _sys_vfork(struct pt_regs *regs);
-long sys_execve(char __user *filename, char __user * __user *argv,
-                char __user * __user *envp);
-long _sys_execve(char __user *filename, char __user * __user *argv,
-                 char __user * __user *envp, struct pt_regs *regs);
+long sys_execve(const char __user *filename,
+                const char __user *const __user *argv,
+                const char __user *const __user *envp);
+long _sys_execve(const char __user *filename,
+                 const char __user *const __user *argv,
+                 const char __user *const __user *envp, struct pt_regs *regs);
 
 /* kernel/signal.c */
 long sys_sigaltstack(const stack_t __user *, stack_t __user *);
@@ -86,10 +88,13 @@ int _sys_cmpxchg_badaddr(unsigned long address, struct pt_regs *);
 #endif
 
 #ifdef CONFIG_COMPAT
-long compat_sys_execve(char __user *path, compat_uptr_t __user *argv,
-                       compat_uptr_t __user *envp);
-long _compat_sys_execve(char __user *path, compat_uptr_t __user *argv,
-                        compat_uptr_t __user *envp, struct pt_regs *regs);
+long compat_sys_execve(const char __user *path,
+                       const compat_uptr_t __user *argv,
+                       const compat_uptr_t __user *envp);
+long _compat_sys_execve(const char __user *path,
+                        const compat_uptr_t __user *argv,
+                        const compat_uptr_t __user *envp,
+                        struct pt_regs *regs);
 long compat_sys_sigaltstack(const struct compat_sigaltstack __user *uss_ptr,
                             struct compat_sigaltstack __user *uoss_ptr);
 long _compat_sys_sigaltstack(const struct compat_sigaltstack __user *uss_ptr,
diff --git a/arch/tile/kernel/process.c b/arch/tile/kernel/process.c
index 985cc28c74c5..84c29111756c 100644
--- a/arch/tile/kernel/process.c
+++ b/arch/tile/kernel/process.c
@@ -408,6 +408,15 @@ static void save_arch_state(struct thread_struct *t)
 #if CHIP_HAS_PROC_STATUS_SPR()
         t->proc_status = __insn_mfspr(SPR_PROC_STATUS);
 #endif
+#if !CHIP_HAS_FIXED_INTVEC_BASE()
+        t->interrupt_vector_base = __insn_mfspr(SPR_INTERRUPT_VECTOR_BASE_0);
+#endif
+#if CHIP_HAS_TILE_RTF_HWM()
+        t->tile_rtf_hwm = __insn_mfspr(SPR_TILE_RTF_HWM);
+#endif
+#if CHIP_HAS_DSTREAM_PF()
+        t->dstream_pf = __insn_mfspr(SPR_DSTREAM_PF);
+#endif
 }
 
 static void restore_arch_state(const struct thread_struct *t)
@@ -428,14 +437,14 @@ static void restore_arch_state(const struct thread_struct *t)
 #if CHIP_HAS_PROC_STATUS_SPR()
         __insn_mtspr(SPR_PROC_STATUS, t->proc_status);
 #endif
+#if !CHIP_HAS_FIXED_INTVEC_BASE()
+        __insn_mtspr(SPR_INTERRUPT_VECTOR_BASE_0, t->interrupt_vector_base);
+#endif
 #if CHIP_HAS_TILE_RTF_HWM()
-        /*
-         * Clear this whenever we switch back to a process in case
-         * the previous process was monkeying with it.  Even if enabled
-         * in CBOX_MSR1 via TILE_RTF_HWM_MIN, it's still just a
-         * performance hint, so isn't worth a full save/restore.
-         */
-        __insn_mtspr(SPR_TILE_RTF_HWM, 0);
+        __insn_mtspr(SPR_TILE_RTF_HWM, t->tile_rtf_hwm);
+#endif
+#if CHIP_HAS_DSTREAM_PF()
+        __insn_mtspr(SPR_DSTREAM_PF, t->dstream_pf);
 #endif
 }
 
@@ -561,8 +570,9 @@ out:
 }
 
 #ifdef CONFIG_COMPAT
-long _compat_sys_execve(char __user *path, compat_uptr_t __user *argv,
-                        compat_uptr_t __user *envp, struct pt_regs *regs)
+long _compat_sys_execve(const char __user *path,
+                        const compat_uptr_t __user *argv,
+                        const compat_uptr_t __user *envp, struct pt_regs *regs)
 {
         long error;
         char *filename;
@@ -657,7 +667,7 @@ void show_regs(struct pt_regs *regs)
                regs->regs[51], regs->regs[52], regs->tp);
         pr_err(" sp : "REGFMT" lr : "REGFMT"\n", regs->sp, regs->lr);
 #else
-        for (i = 0; i < 52; i += 3)
+        for (i = 0; i < 52; i += 4)
                 pr_err(" r%-2d: "REGFMT" r%-2d: "REGFMT
                        " r%-2d: "REGFMT" r%-2d: "REGFMT"\n",
                        i, regs->regs[i], i+1, regs->regs[i+1],
diff --git a/arch/tile/kernel/signal.c b/arch/tile/kernel/signal.c
index 45b66a3c991f..ce183aa1492c 100644
--- a/arch/tile/kernel/signal.c
+++ b/arch/tile/kernel/signal.c
@@ -61,13 +61,19 @@ int restore_sigcontext(struct pt_regs *regs,
         /* Always make any pending restarted system calls return -EINTR */
         current_thread_info()->restart_block.fn = do_no_restart_syscall;
 
+        /*
+         * Enforce that sigcontext is like pt_regs, and doesn't mess
+         * up our stack alignment rules.
+         */
+        BUILD_BUG_ON(sizeof(struct sigcontext) != sizeof(struct pt_regs));
+        BUILD_BUG_ON(sizeof(struct sigcontext) % 8 != 0);
+
         for (i = 0; i < sizeof(struct pt_regs)/sizeof(long); ++i)
-                err |= __get_user(((long *)regs)[i],
-                                  &((long __user *)(&sc->regs))[i]);
+                err |= __get_user(regs->regs[i], &sc->gregs[i]);
 
         regs->faultnum = INT_SWINT_1_SIGRETURN;
 
-        err |= __get_user(*pr0, &sc->regs.regs[0]);
+        err |= __get_user(*pr0, &sc->gregs[0]);
         return err;
 }
 
@@ -112,8 +118,7 @@ int setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs)
         int i, err = 0;
 
         for (i = 0; i < sizeof(struct pt_regs)/sizeof(long); ++i)
-                err |= __put_user(((long *)regs)[i],
-                                  &((long __user *)(&sc->regs))[i]);
+                err |= __put_user(regs->regs[i], &sc->gregs[i]);
 
         return err;
 }
@@ -203,19 +208,17 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
          * Set up registers for signal handler.
          * Registers that we don't modify keep the value they had from
          * user-space at the time we took the signal.
+         * We always pass siginfo and mcontext, regardless of SA_SIGINFO,
+         * since some things rely on this (e.g. glibc's debug/segfault.c).
          */
         regs->pc = (unsigned long) ka->sa.sa_handler;
         regs->ex1 = PL_ICS_EX1(USER_PL, 1); /* set crit sec in handler */
         regs->sp = (unsigned long) frame;
         regs->lr = restorer;
         regs->regs[0] = (unsigned long) usig;
-
-        if (ka->sa.sa_flags & SA_SIGINFO) {
-                /* Need extra arguments, so mark to restore caller-saves. */
-                regs->regs[1] = (unsigned long) &frame->info;
-                regs->regs[2] = (unsigned long) &frame->uc;
-                regs->flags |= PT_FLAGS_CALLER_SAVES;
-        }
+        regs->regs[1] = (unsigned long) &frame->info;
+        regs->regs[2] = (unsigned long) &frame->uc;
+        regs->flags |= PT_FLAGS_CALLER_SAVES;
 
         /*
          * Notify any tracer that was single-stepping it.
diff --git a/arch/tile/kernel/stack.c b/arch/tile/kernel/stack.c
index 38a68b0b4581..ea2e0ce28380 100644
--- a/arch/tile/kernel/stack.c
+++ b/arch/tile/kernel/stack.c
@@ -175,7 +175,7 @@ static struct pt_regs *valid_sigframe(struct KBacktraceIterator* kbt)
                         pr_err("  <received signal %d>\n",
                                frame->info.si_signo);
                 }
-                return &frame->uc.uc_mcontext.regs;
+                return (struct pt_regs *)&frame->uc.uc_mcontext;
         }
         return NULL;
 }
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
index d2ab01e90a96..dcbeb98f195a 100644
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -103,8 +103,8 @@ int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
                 if (connector->funcs->force)
                         connector->funcs->force(connector);
         } else {
-                connector->status = connector->funcs->detect(connector);
-                drm_helper_hpd_irq_event(dev);
+                connector->status = connector->funcs->detect(connector, true);
+                drm_kms_helper_poll_enable(dev);
         }
 
         if (connector->status == connector_status_disconnected) {
@@ -637,13 +637,13 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set)
                 mode_changed = true;
 
         if (mode_changed) {
-                old_fb = set->crtc->fb;
-                set->crtc->fb = set->fb;
                 set->crtc->enabled = (set->mode != NULL);
                 if (set->mode != NULL) {
                         DRM_DEBUG_KMS("attempting to set mode from"
                                         " userspace\n");
                         drm_mode_debug_printmodeline(set->mode);
+                        old_fb = set->crtc->fb;
+                        set->crtc->fb = set->fb;
                         if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
                                                       set->x, set->y,
                                                       old_fb)) {
@@ -866,7 +866,7 @@ static void output_poll_execute(struct work_struct *work)
                     !(connector->polled & DRM_CONNECTOR_POLL_HPD))
                         continue;
 
-                status = connector->funcs->detect(connector);
+                status = connector->funcs->detect(connector, false);
                 if (old_status != status)
                         changed = true;
         }
diff --git a/drivers/gpu/drm/drm_pci.c b/drivers/gpu/drm/drm_pci.c
index e20f78b542a7..f5bd9e590c80 100644
--- a/drivers/gpu/drm/drm_pci.c
+++ b/drivers/gpu/drm/drm_pci.c
@@ -164,6 +164,8 @@ int drm_get_pci_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
         dev->hose = pdev->sysdata;
 #endif
 
+        mutex_lock(&drm_global_mutex);
+
         if ((ret = drm_fill_in_dev(dev, ent, driver))) {
                 printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
                 goto err_g2;
@@ -199,6 +201,7 @@ int drm_get_pci_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
                  driver->name, driver->major, driver->minor, driver->patchlevel,
                  driver->date, pci_name(pdev), dev->primary->index);
 
+        mutex_unlock(&drm_global_mutex);
         return 0;
 
 err_g4:
@@ -210,6 +213,7 @@ err_g2:
         pci_disable_device(pdev);
 err_g1:
         kfree(dev);
+        mutex_unlock(&drm_global_mutex);
         return ret;
 }
 EXPORT_SYMBOL(drm_get_pci_dev);
diff --git a/drivers/gpu/drm/drm_platform.c b/drivers/gpu/drm/drm_platform.c
index 460e9a3afa8d..92d1d0fb7b75 100644
--- a/drivers/gpu/drm/drm_platform.c
+++ b/drivers/gpu/drm/drm_platform.c
@@ -53,6 +53,8 @@ int drm_get_platform_dev(struct platform_device *platdev,
         dev->platformdev = platdev;
         dev->dev = &platdev->dev;
 
+        mutex_lock(&drm_global_mutex);
+
         ret = drm_fill_in_dev(dev, NULL, driver);
 
         if (ret) {
@@ -87,6 +89,8 @@ int drm_get_platform_dev(struct platform_device *platdev,
 
         list_add_tail(&dev->driver_item, &driver->device_list);
 
+        mutex_unlock(&drm_global_mutex);
+
         DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
                  driver->name, driver->major, driver->minor, driver->patchlevel,
                  driver->date, dev->primary->index);
@@ -100,6 +104,7 @@ err_g2:
                 drm_put_minor(&dev->control);
 err_g1:
         kfree(dev);
+        mutex_unlock(&drm_global_mutex);
         return ret;
 }
 EXPORT_SYMBOL(drm_get_platform_dev);
diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c
index 86118a742231..85da4c40694c 100644
--- a/drivers/gpu/drm/drm_sysfs.c
+++ b/drivers/gpu/drm/drm_sysfs.c
@@ -159,7 +159,7 @@ static ssize_t status_show(struct device *device,
         struct drm_connector *connector = to_drm_connector(device);
         enum drm_connector_status status;
 
-        status = connector->funcs->detect(connector);
+        status = connector->funcs->detect(connector, true);
         return snprintf(buf, PAGE_SIZE, "%s\n",
                         drm_get_connector_status_name(status));
 }
diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c
index 4b7735196cd5..a02a8df73727 100644
--- a/drivers/gpu/drm/i915/intel_crt.c
+++ b/drivers/gpu/drm/i915/intel_crt.c
@@ -400,7 +400,8 @@ intel_crt_load_detect(struct drm_crtc *crtc, struct intel_encoder *intel_encoder
         return status;
 }
 
-static enum drm_connector_status intel_crt_detect(struct drm_connector *connector)
+static enum drm_connector_status
+intel_crt_detect(struct drm_connector *connector, bool force)
 {
         struct drm_device *dev = connector->dev;
         struct drm_encoder *encoder = intel_attached_encoder(connector);
@@ -419,6 +420,9 @@ static enum drm_connector_status intel_crt_detect(struct drm_connector *connecto
         if (intel_crt_detect_ddc(encoder))
                 return connector_status_connected;
 
+        if (!force)
+                return connector->status;
+
         /* for pre-945g platforms use load detect */
         if (encoder->crtc && encoder->crtc->enabled) {
                 status = intel_crt_load_detect(encoder->crtc, intel_encoder);
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 51d142939a26..1a51ee07de3e 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1386,7 +1386,7 @@ ironlake_dp_detect(struct drm_connector *connector)
  * \return false if DP port is disconnected.
  */
 static enum drm_connector_status
-intel_dp_detect(struct drm_connector *connector)
+intel_dp_detect(struct drm_connector *connector, bool force)
 {
         struct drm_encoder *encoder = intel_attached_encoder(connector);
         struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
diff --git a/drivers/gpu/drm/i915/intel_dvo.c b/drivers/gpu/drm/i915/intel_dvo.c
index a399f4b2c1c5..7c9ec1472d46 100644
--- a/drivers/gpu/drm/i915/intel_dvo.c
+++ b/drivers/gpu/drm/i915/intel_dvo.c
@@ -221,7 +221,8 @@ static void intel_dvo_mode_set(struct drm_encoder *encoder,
  *
  * Unimplemented.
  */
-static enum drm_connector_status intel_dvo_detect(struct drm_connector *connector)
+static enum drm_connector_status
+intel_dvo_detect(struct drm_connector *connector, bool force)
 {
         struct drm_encoder *encoder = intel_attached_encoder(connector);
         struct intel_dvo *intel_dvo = enc_to_intel_dvo(encoder);
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index ccd4c97e6524..926934a482ec 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -139,7 +139,7 @@ static bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
 }
 
 static enum drm_connector_status
-intel_hdmi_detect(struct drm_connector *connector)
+intel_hdmi_detect(struct drm_connector *connector, bool force)
 {
         struct drm_encoder *encoder = intel_attached_encoder(connector);
         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index 4fbb0165b26f..6ec39a86ed06 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -445,7 +445,8 @@ static void intel_lvds_mode_set(struct drm_encoder *encoder,
  * connected and closed means disconnected.  We also send hotplug events as
  * needed, using lid status notification from the input layer.
  */
-static enum drm_connector_status intel_lvds_detect(struct drm_connector *connector)
+static enum drm_connector_status
+intel_lvds_detect(struct drm_connector *connector, bool force)
 {
         struct drm_device *dev = connector->dev;
         enum drm_connector_status status = connector_status_connected;
@@ -540,7 +541,9 @@ static int intel_lid_notify(struct notifier_block *nb, unsigned long val,
          * the LID nofication event.
          */
         if (connector)
-                connector->status = connector->funcs->detect(connector);
+                connector->status = connector->funcs->detect(connector,
+                                                             false);
+
         /* Don't force modeset on machines where it causes a GPU lockup */
         if (dmi_check_system(intel_no_modeset_on_lid))
                 return NOTIFY_OK;
diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
index e3b7a7ee39cb..e8e902d614ed 100644
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -1417,7 +1417,7 @@ intel_analog_is_connected(struct drm_device *dev)
         if (!analog_connector)
                 return false;
 
-        if (analog_connector->funcs->detect(analog_connector) ==
+        if (analog_connector->funcs->detect(analog_connector, false) ==
                         connector_status_disconnected)
                 return false;
 
@@ -1486,7 +1486,8 @@ intel_sdvo_hdmi_sink_detect(struct drm_connector *connector)
         return status;
 }
 
-static enum drm_connector_status intel_sdvo_detect(struct drm_connector *connector)
+static enum drm_connector_status
+intel_sdvo_detect(struct drm_connector *connector, bool force)
 {
         uint16_t response;
         struct drm_encoder *encoder = intel_attached_encoder(connector);
diff --git a/drivers/gpu/drm/i915/intel_tv.c b/drivers/gpu/drm/i915/intel_tv.c
index c671f60ce80b..4a117e318a73 100644
--- a/drivers/gpu/drm/i915/intel_tv.c
+++ b/drivers/gpu/drm/i915/intel_tv.c
@@ -1341,7 +1341,7 @@ static void intel_tv_find_better_format(struct drm_connector *connector)
  * we have a pipe programmed in order to probe the TV.
  */
 static enum drm_connector_status
-intel_tv_detect(struct drm_connector *connector)
+intel_tv_detect(struct drm_connector *connector, bool force)
 {
         struct drm_display_mode mode;
         struct drm_encoder *encoder = intel_attached_encoder(connector);
@@ -1353,7 +1353,7 @@ intel_tv_detect(struct drm_connector *connector)
 
         if (encoder->crtc && encoder->crtc->enabled) {
                 type = intel_tv_detect_type(intel_tv);
-        } else {
+        } else if (force) {
                 struct drm_crtc *crtc;
                 int dpms_mode;
 
@@ -1364,10 +1364,9 @@ intel_tv_detect(struct drm_connector *connector)
                         intel_release_load_detect_pipe(&intel_tv->base, connector,
                                                        dpms_mode);
                 } else
-                        type = -1;
-        }
-
-        intel_tv->type = type;
+                        return connector_status_unknown;
+        } else
+                return connector->status;
 
         if (type < 0)
                 return connector_status_disconnected;
diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
index a1473fff06ac..87186a4bbf03 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -168,7 +168,7 @@ nouveau_connector_set_encoder(struct drm_connector *connector,
 }
 
 static enum drm_connector_status
-nouveau_connector_detect(struct drm_connector *connector)
+nouveau_connector_detect(struct drm_connector *connector, bool force)
 {
         struct drm_device *dev = connector->dev;
         struct nouveau_connector *nv_connector = nouveau_connector(connector);
@@ -246,7 +246,7 @@ detect_analog:
 }
 
 static enum drm_connector_status
-nouveau_connector_detect_lvds(struct drm_connector *connector)
+nouveau_connector_detect_lvds(struct drm_connector *connector, bool force)
 {
         struct drm_device *dev = connector->dev;
         struct drm_nouveau_private *dev_priv = dev->dev_private;
@@ -267,7 +267,7 @@ nouveau_connector_detect_lvds(struct drm_connector *connector)
 
         /* Try retrieving EDID via DDC */
         if (!dev_priv->vbios.fp_no_ddc) {
-                status = nouveau_connector_detect(connector);
+                status = nouveau_connector_detect(connector, force);
                 if (status == connector_status_connected)
                         goto out;
         }
diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c
index 464a81a1990f..cd0290f946cf 100644
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -539,14 +539,15 @@ static u32 atombios_adjust_pll(struct drm_crtc *crtc,
                                         pll->algo = PLL_ALGO_LEGACY;
                                         pll->flags |= RADEON_PLL_PREFER_CLOSEST_LOWER;
                                 }
-                                /* There is some evidence (often anecdotal) that RV515 LVDS
+                                /* There is some evidence (often anecdotal) that RV515/RV620 LVDS
                                  * (on some boards at least) prefers the legacy algo.  I'm not
                                  * sure whether this should handled generically or on a
                                  * case-by-case quirk basis.  Both algos should work fine in the
                                  * majority of cases.
                                  */
                                 if ((radeon_encoder->active_device & (ATOM_DEVICE_LCD_SUPPORT)) &&
-                                    (rdev->family == CHIP_RV515)) {
+                                    ((rdev->family == CHIP_RV515) ||
+                                     (rdev->family == CHIP_RV620))) {
                                         /* allow the user to overrride just in case */
                                         if (radeon_new_pll == 1)
                                                 pll->algo = PLL_ALGO_NEW;
diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index b8b7f010b25f..79082d4398ae 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -1160,14 +1160,25 @@ static void evergreen_gpu_init(struct radeon_device *rdev)
                                                                         EVERGREEN_MAX_BACKENDS_MASK));
                         break;
                 }
-        } else
-                gb_backend_map =
-                        evergreen_get_tile_pipe_to_backend_map(rdev,
-                                                               rdev->config.evergreen.max_tile_pipes,
-                                                               rdev->config.evergreen.max_backends,
-                                                               ((EVERGREEN_MAX_BACKENDS_MASK <<
-                                                                 rdev->config.evergreen.max_backends) &
-                                                                EVERGREEN_MAX_BACKENDS_MASK));
+        } else {
+                switch (rdev->family) {
+                case CHIP_CYPRESS:
+                case CHIP_HEMLOCK:
+                        gb_backend_map = 0x66442200;
+                        break;
+                case CHIP_JUNIPER:
+                        gb_backend_map = 0x00006420;
+                        break;
+                default:
+                        gb_backend_map =
+                                evergreen_get_tile_pipe_to_backend_map(rdev,
+                                                                       rdev->config.evergreen.max_tile_pipes,
+                                                                       rdev->config.evergreen.max_backends,
+                                                                       ((EVERGREEN_MAX_BACKENDS_MASK <<
+                                                                         rdev->config.evergreen.max_backends) &
+                                                                        EVERGREEN_MAX_BACKENDS_MASK));
+                }
+        }
 
         rdev->config.evergreen.tile_config = gb_addr_config;
         WREG32(GB_BACKEND_MAP, gb_backend_map);
diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index e817a0bb5eb4..e151f16a8f86 100644
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -2020,18 +2020,7 @@ bool r100_gpu_cp_is_lockup(struct radeon_device *rdev, struct r100_gpu_lockup *l
                 return false;
         }
         elapsed = jiffies_to_msecs(cjiffies - lockup->last_jiffies);
-        if (elapsed >= 3000) {
-                /* very likely the improbable case where current
-                 * rptr is equal to last recorded, a while ago, rptr
-                 * this is more likely a false positive update tracking
-                 * information which should force us to be recall at
-                 * latter point
-                 */
-                lockup->last_cp_rptr = cp->rptr;
-                lockup->last_jiffies = jiffies;
-                return false;
-        }
-        if (elapsed >= 1000) {
+        if (elapsed >= 10000) {
                 dev_err(rdev->dev, "GPU lockup CP stall for more than %lumsec\n", elapsed);
                 return true;
         }
@@ -3308,13 +3297,14 @@ int r100_cs_track_check(struct radeon_device *rdev, struct r100_cs_track *track)
         unsigned long size;
         unsigned prim_walk;
         unsigned nverts;
+        unsigned num_cb = track->num_cb;
 
-        for (i = 0; i < track->num_cb; i++) {
+        if (!track->zb_cb_clear && !track->color_channel_mask &&
+            !track->blend_read_enable)
+                num_cb = 0;
+
+        for (i = 0; i < num_cb; i++) {
                 if (track->cb[i].robj == NULL) {
-                        if (!(track->zb_cb_clear || track->color_channel_mask ||
-                              track->blend_read_enable)) {
-                                continue;
-                        }
                         DRM_ERROR("[drm] No buffer for color buffer %d !\n", i);
                         return -EINVAL;
                 }
diff --git a/drivers/gpu/drm/radeon/r600_blit_kms.c b/drivers/gpu/drm/radeon/r600_blit_kms.c
index d13622ae74e9..9ceb2a1ce799 100644
--- a/drivers/gpu/drm/radeon/r600_blit_kms.c
+++ b/drivers/gpu/drm/radeon/r600_blit_kms.c
@@ -1,3 +1,28 @@
+/*
+ * Copyright 2009 Advanced Micro Devices, Inc.
+ * Copyright 2009 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ */
+
 #include "drmP.h"
 #include "drm.h"
 #include "radeon_drm.h"
diff --git a/drivers/gpu/drm/radeon/r600_blit_shaders.h b/drivers/gpu/drm/radeon/r600_blit_shaders.h
index fdc3b378cbb0..f437d36dd98c 100644
--- a/drivers/gpu/drm/radeon/r600_blit_shaders.h
+++ b/drivers/gpu/drm/radeon/r600_blit_shaders.h
@@ -1,3 +1,27 @@
+/*
+ * Copyright 2009 Advanced Micro Devices, Inc.
+ * Copyright 2009 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ */
 
 #ifndef R600_BLIT_SHADERS_H
 #define R600_BLIT_SHADERS_H
diff --git a/drivers/gpu/drm/radeon/r600_cs.c b/drivers/gpu/drm/radeon/r600_cs.c
index d8864949e387..250a3a918193 100644
--- a/drivers/gpu/drm/radeon/r600_cs.c
+++ b/drivers/gpu/drm/radeon/r600_cs.c
@@ -1170,9 +1170,8 @@ static inline int r600_check_texture_resource(struct radeon_cs_parser *p,  u32 i
         /* using get ib will give us the offset into the mipmap bo */
         word0 = radeon_get_ib_value(p, idx + 3) << 8;
         if ((mipmap_size + word0) > radeon_bo_size(mipmap)) {
-                dev_warn(p->dev, "mipmap bo too small (%d %d %d %d %d %d -> %d have %ld)\n",
-                        w0, h0, bpe, blevel, nlevels, word0, mipmap_size, radeon_bo_size(texture));
-                return -EINVAL;
+                /*dev_warn(p->dev, "mipmap bo too small (%d %d %d %d %d %d -> %d have %ld)\n",
+                  w0, h0, bpe, blevel, nlevels, word0, mipmap_size, radeon_bo_size(texture));*/
         }
         return 0;
 }
diff --git a/drivers/gpu/drm/radeon/radeon_combios.c b/drivers/gpu/drm/radeon/radeon_combios.c
index bd74e428bd14..a04b7a6ad95f 100644
--- a/drivers/gpu/drm/radeon/radeon_combios.c
+++ b/drivers/gpu/drm/radeon/radeon_combios.c
@@ -1485,6 +1485,11 @@ bool radeon_get_legacy_connector_info_from_table(struct drm_device *dev)
                         /* PowerMac8,1 ? */
                         /* imac g5 isight */
                         rdev->mode_info.connector_table = CT_IMAC_G5_ISIGHT;
+                } else if ((rdev->pdev->device == 0x4a48) &&
+                           (rdev->pdev->subsystem_vendor == 0x1002) &&
+                           (rdev->pdev->subsystem_device == 0x4a48)) {
+                        /* Mac X800 */
+                        rdev->mode_info.connector_table = CT_MAC_X800;
                 } else
 #endif /* CONFIG_PPC_PMAC */
 #ifdef CONFIG_PPC64
@@ -1961,6 +1966,48 @@ bool radeon_get_legacy_connector_info_from_table(struct drm_device *dev)
                                             CONNECTOR_OBJECT_ID_VGA,
                                             &hpd);
                 break;
+        case CT_MAC_X800:
+                DRM_INFO("Connector Table: %d (mac x800)\n",
+                         rdev->mode_info.connector_table);
+                /* DVI - primary dac, internal tmds */
+                ddc_i2c = combios_setup_i2c_bus(rdev, DDC_DVI, 0, 0);
+                hpd.hpd = RADEON_HPD_1; /* ??? */
+                radeon_add_legacy_encoder(dev,
+                                          radeon_get_encoder_enum(dev,
+                                                                  ATOM_DEVICE_DFP1_SUPPORT,
+                                                                  0),
+                                          ATOM_DEVICE_DFP1_SUPPORT);
+                radeon_add_legacy_encoder(dev,
+                                          radeon_get_encoder_enum(dev,
+                                                                  ATOM_DEVICE_CRT1_SUPPORT,
+                                                                  1),
+                                          ATOM_DEVICE_CRT1_SUPPORT);
+                radeon_add_legacy_connector(dev, 0,
+                                            ATOM_DEVICE_DFP1_SUPPORT |
+                                            ATOM_DEVICE_CRT1_SUPPORT,
+                                            DRM_MODE_CONNECTOR_DVII, &ddc_i2c,
+                                            CONNECTOR_OBJECT_ID_SINGLE_LINK_DVI_I,
+                                            &hpd);
+                /* DVI - tv dac, dvo */
+                ddc_i2c = combios_setup_i2c_bus(rdev, DDC_MONID, 0, 0);
+                hpd.hpd = RADEON_HPD_2; /* ??? */
+                radeon_add_legacy_encoder(dev,
+                                          radeon_get_encoder_enum(dev,
+                                                                  ATOM_DEVICE_DFP2_SUPPORT,
+                                                                  0),
+                                          ATOM_DEVICE_DFP2_SUPPORT);
+                radeon_add_legacy_encoder(dev,
+                                          radeon_get_encoder_enum(dev,
+                                                                  ATOM_DEVICE_CRT2_SUPPORT,
+                                                                  2),
+                                          ATOM_DEVICE_CRT2_SUPPORT);
+                radeon_add_legacy_connector(dev, 1,
+                                            ATOM_DEVICE_DFP2_SUPPORT |
+                                            ATOM_DEVICE_CRT2_SUPPORT,
+                                            DRM_MODE_CONNECTOR_DVII, &ddc_i2c,
+                                            CONNECTOR_OBJECT_ID_DUAL_LINK_DVI_I,
+                                            &hpd);
+                break;
         default:
                 DRM_INFO("Connector table: %d (invalid)\n",
                          rdev->mode_info.connector_table);
diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c
index a9dd7847d96e..ecc1a8fafbfd 100644
--- a/drivers/gpu/drm/radeon/radeon_connectors.c
+++ b/drivers/gpu/drm/radeon/radeon_connectors.c
@@ -481,7 +481,8 @@ static int radeon_lvds_mode_valid(struct drm_connector *connector,
         return MODE_OK;
 }
 
-static enum drm_connector_status radeon_lvds_detect(struct drm_connector *connector)
+static enum drm_connector_status
+radeon_lvds_detect(struct drm_connector *connector, bool force)
 {
         struct radeon_connector *radeon_connector = to_radeon_connector(connector);
         struct drm_encoder *encoder = radeon_best_single_encoder(connector);
@@ -594,7 +595,8 @@ static int radeon_vga_mode_valid(struct drm_connector *connector,
         return MODE_OK;
 }
 
-static enum drm_connector_status radeon_vga_detect(struct drm_connector *connector)
+static enum drm_connector_status
+radeon_vga_detect(struct drm_connector *connector, bool force)
 {
         struct radeon_connector *radeon_connector = to_radeon_connector(connector);
         struct drm_encoder *encoder;
@@ -691,7 +693,8 @@ static int radeon_tv_mode_valid(struct drm_connector *connector,
         return MODE_OK;
 }
 
-static enum drm_connector_status radeon_tv_detect(struct drm_connector *connector)
+static enum drm_connector_status
+radeon_tv_detect(struct drm_connector *connector, bool force)
 {
         struct drm_encoder *encoder;
         struct drm_encoder_helper_funcs *encoder_funcs;
@@ -748,7 +751,8 @@ static int radeon_dvi_get_modes(struct drm_connector *connector)
  * we have to check if this analog encoder is shared with anyone else (TV)
  * if its shared we have to set the other connector to disconnected.
  */
-static enum drm_connector_status radeon_dvi_detect(struct drm_connector *connector)
+static enum drm_connector_status
+radeon_dvi_detect(struct drm_connector *connector, bool force)
 {
         struct radeon_connector *radeon_connector = to_radeon_connector(connector);
         struct drm_encoder *encoder = NULL;
@@ -972,7 +976,8 @@ static int radeon_dp_get_modes(struct drm_connector *connector)
         return ret;
 }
 
-static enum drm_connector_status radeon_dp_detect(struct drm_connector *connector)
+static enum drm_connector_status
+radeon_dp_detect(struct drm_connector *connector, bool force)
 {
         struct radeon_connector *radeon_connector = to_radeon_connector(connector);
         enum drm_connector_status ret = connector_status_disconnected;
diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index 6dd434ad2429..127a395f70fb 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -1140,17 +1140,18 @@ bool radeon_crtc_scaling_mode_fixup(struct drm_crtc *crtc,
                                 radeon_crtc->rmx_type = radeon_encoder->rmx_type;
                         else
                                 radeon_crtc->rmx_type = RMX_OFF;
-                        src_v = crtc->mode.vdisplay;
-                        dst_v = radeon_crtc->native_mode.vdisplay;
-                        src_h = crtc->mode.hdisplay;
-                        dst_h = radeon_crtc->native_mode.vdisplay;
                         /* copy native mode */
                         memcpy(&radeon_crtc->native_mode,
                                &radeon_encoder->native_mode,
                                 sizeof(struct drm_display_mode));
+                        src_v = crtc->mode.vdisplay;
+                        dst_v = radeon_crtc->native_mode.vdisplay;
+                        src_h = crtc->mode.hdisplay;
+                        dst_h = radeon_crtc->native_mode.hdisplay;
 
                         /* fix up for overscan on hdmi */
                         if (ASIC_IS_AVIVO(rdev) &&
+                            (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) &&
                             ((radeon_encoder->underscan_type == UNDERSCAN_ON) ||
                              ((radeon_encoder->underscan_type == UNDERSCAN_AUTO) &&
                               drm_detect_hdmi_monitor(radeon_connector->edid) &&
diff --git a/drivers/gpu/drm/radeon/radeon_mode.h b/drivers/gpu/drm/radeon/radeon_mode.h
index efbe975312dc..17a6602b5885 100644
--- a/drivers/gpu/drm/radeon/radeon_mode.h
+++ b/drivers/gpu/drm/radeon/radeon_mode.h
@@ -204,7 +204,7 @@ struct radeon_i2c_chan {
 
 /* mostly for macs, but really any system without connector tables */
 enum radeon_connector_table {
-        CT_NONE,
+        CT_NONE = 0,
         CT_GENERIC,
         CT_IBOOK,
         CT_POWERBOOK_EXTERNAL,
@@ -215,6 +215,7 @@ enum radeon_connector_table {
         CT_IMAC_G5_ISIGHT,
         CT_EMAC,
         CT_RN50_POWER,
+        CT_MAC_X800,
 };
 
 enum radeon_dvo_chip {
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c b/drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c
index 2ff5cf78235f..7083b1a24df3 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c
@@ -335,7 +335,8 @@ static void vmw_ldu_connector_restore(struct drm_connector *connector)
 }
 
 static enum drm_connector_status
-        vmw_ldu_connector_detect(struct drm_connector *connector)
+        vmw_ldu_connector_detect(struct drm_connector *connector,
+                                 bool force)
 {
         if (vmw_connector_to_ldu(connector)->pref_active)
                 return connector_status_connected;
@@ -516,7 +517,7 @@ static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit)
 
         drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
                            DRM_MODE_CONNECTOR_LVDS);
-        connector->status = vmw_ldu_connector_detect(connector);
+        connector->status = vmw_ldu_connector_detect(connector, true);
 
         drm_encoder_init(dev, encoder, &vmw_legacy_encoder_funcs,
                          DRM_MODE_ENCODER_LVDS);
@@ -610,7 +611,7 @@ int vmw_kms_ldu_update_layout(struct vmw_private *dev_priv, unsigned num,
                         ldu->pref_height = 600;
                         ldu->pref_active = false;
                 }
-                con->status = vmw_ldu_connector_detect(con);
+                con->status = vmw_ldu_connector_detect(con, true);
         }
 
         mutex_unlock(&dev->mode_config.mutex);
diff --git a/drivers/regulator/88pm8607.c b/drivers/regulator/88pm8607.c
index 7d149a8d8d9b..2ce2eb71d0f5 100644
--- a/drivers/regulator/88pm8607.c
+++ b/drivers/regulator/88pm8607.c
@@ -215,7 +215,7 @@ static int pm8607_list_voltage(struct regulator_dev *rdev, unsigned index)
         struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
         int ret = -EINVAL;
 
-        if (info->vol_table && (index < (2 << info->vol_nbits))) {
+        if (info->vol_table && (index < (1 << info->vol_nbits))) {
                 ret = info->vol_table[index];
                 if (info->slope_double)
                         ret <<= 1;
@@ -233,7 +233,7 @@ static int choose_voltage(struct regulator_dev *rdev, int min_uV, int max_uV)
                 max_uV = max_uV >> 1;
         }
         if (info->vol_table) {
-                for (i = 0; i < (2 << info->vol_nbits); i++) {
+                for (i = 0; i < (1 << info->vol_nbits); i++) {
                         if (!info->vol_table[i])
                                 break;
                         if ((min_uV <= info->vol_table[i])
diff --git a/drivers/regulator/ab3100.c b/drivers/regulator/ab3100.c
index 11790990277a..b349266a43de 100644
--- a/drivers/regulator/ab3100.c
+++ b/drivers/regulator/ab3100.c
@@ -634,12 +634,9 @@ static int __devinit ab3100_regulators_probe(struct platform_device *pdev)
                                 "%s: failed to register regulator %s err %d\n",
                                 __func__, ab3100_regulator_desc[i].name,
                                 err);
-                        i--;
                         /* remove the already registered regulators */
-                        while (i > 0) {
+                        while (--i >= 0)
                                 regulator_unregister(ab3100_regulators[i].rdev);
-                                i--;
-                        }
                         return err;
                 }
 
diff --git a/drivers/regulator/ab8500.c b/drivers/regulator/ab8500.c
index dc3f1a491675..28c7ae67cec9 100644
--- a/drivers/regulator/ab8500.c
+++ b/drivers/regulator/ab8500.c
@@ -157,7 +157,7 @@ static int ab8500_list_voltage(struct regulator_dev *rdev, unsigned selector)
         if (info->fixed_uV)
                 return info->fixed_uV;
 
-        if (selector > info->voltages_len)
+        if (selector >= info->voltages_len)
                 return -EINVAL;
 
         return info->supported_voltages[selector];
@@ -344,13 +344,14 @@ static inline struct ab8500_regulator_info *find_regulator_info(int id)
 static __devinit int ab8500_regulator_probe(struct platform_device *pdev)
 {
         struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
-        struct ab8500_platform_data *pdata = dev_get_platdata(ab8500->dev);
+        struct ab8500_platform_data *pdata;
         int i, err;
 
         if (!ab8500) {
                 dev_err(&pdev->dev, "null mfd parent\n");
                 return -EINVAL;
         }
+        pdata = dev_get_platdata(ab8500->dev);
 
         /* register all regulators */
         for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) {
@@ -368,11 +369,9 @@ static __devinit int ab8500_regulator_probe(struct platform_device *pdev)
                         dev_err(&pdev->dev, "failed to register regulator %s\n",
                                         info->desc.name);
                         /* when we fail, un-register all earlier regulators */
-                        i--;
-                        while (i > 0) {
+                        while (--i >= 0) {
                                 info = &ab8500_regulator_info[i];
                                 regulator_unregister(info->regulator);
-                                i--;
                         }
                         return err;
                 }
diff --git a/drivers/regulator/ad5398.c b/drivers/regulator/ad5398.c
index d59d2f2314af..df1fb53c09d2 100644
--- a/drivers/regulator/ad5398.c
+++ b/drivers/regulator/ad5398.c
@@ -25,7 +25,7 @@ struct ad5398_chip_info {
         unsigned int current_level;
         unsigned int current_mask;
         unsigned int current_offset;
-        struct regulator_dev rdev;
+        struct regulator_dev *rdev;
 };
 
 static int ad5398_calc_current(struct ad5398_chip_info *chip,
@@ -211,7 +211,6 @@ MODULE_DEVICE_TABLE(i2c, ad5398_id);
 static int __devinit ad5398_probe(struct i2c_client *client,
                                 const struct i2c_device_id *id)
 {
-        struct regulator_dev *rdev;
         struct regulator_init_data *init_data = client->dev.platform_data;
         struct ad5398_chip_info *chip;
         const struct ad5398_current_data_format *df =
@@ -233,9 +232,10 @@ static int __devinit ad5398_probe(struct i2c_client *client,
         chip->current_offset = df->current_offset;
         chip->current_mask = (chip->current_level - 1) << chip->current_offset;
 
-        rdev = regulator_register(&ad5398_reg, &client->dev, init_data, chip);
-        if (IS_ERR(rdev)) {
-                ret = PTR_ERR(rdev);
+        chip->rdev = regulator_register(&ad5398_reg, &client->dev,
+                                        init_data, chip);
+        if (IS_ERR(chip->rdev)) {
+                ret = PTR_ERR(chip->rdev);
                 dev_err(&client->dev, "failed to register %s %s\n",
                         id->name, ad5398_reg.name);
                 goto err;
@@ -254,7 +254,7 @@ static int __devexit ad5398_remove(struct i2c_client *client)
 {
         struct ad5398_chip_info *chip = i2c_get_clientdata(client);
 
-        regulator_unregister(&chip->rdev);
+        regulator_unregister(chip->rdev);
         kfree(chip);
         i2c_set_clientdata(client, NULL);
 
diff --git a/drivers/regulator/isl6271a-regulator.c b/drivers/regulator/isl6271a-regulator.c
index e49d2bd393f2..d61ecb885a8c 100644
--- a/drivers/regulator/isl6271a-regulator.c
+++ b/drivers/regulator/isl6271a-regulator.c
@@ -165,7 +165,7 @@ static int __devinit isl6271a_probe(struct i2c_client *i2c,
         mutex_init(&pmic->mtx);
 
         for (i = 0; i < 3; i++) {
-                pmic->rdev[i] = regulator_register(&isl_rd[0], &i2c->dev,
+                pmic->rdev[i] = regulator_register(&isl_rd[i], &i2c->dev,
                                                 init_data, pmic);
                 if (IS_ERR(pmic->rdev[i])) {
                         dev_err(&i2c->dev, "failed to register %s\n", id->name);
diff --git a/drivers/regulator/max1586.c b/drivers/regulator/max1586.c
index 8867c2710a6d..559cfa271a44 100644
--- a/drivers/regulator/max1586.c
+++ b/drivers/regulator/max1586.c
@@ -121,14 +121,14 @@ static int max1586_v6_set(struct regulator_dev *rdev, int min_uV, int max_uV)
         if (max_uV < MAX1586_V6_MIN_UV || max_uV > MAX1586_V6_MAX_UV)
                 return -EINVAL;
 
-        if (min_uV >= 3000000)
-                selector = 3;
-        if (min_uV < 3000000)
-                selector = 2;
-        if (min_uV < 2500000)
-                selector = 1;
         if (min_uV < 1800000)
                 selector = 0;
+        else if (min_uV < 2500000)
+                selector = 1;
+        else if (min_uV < 3000000)
+                selector = 2;
+        else if (min_uV >= 3000000)
+                selector = 3;
 
         if (max1586_v6_calc_voltage(selector) > max_uV)
                 return -EINVAL;
diff --git a/drivers/regulator/max8998.c b/drivers/regulator/max8998.c
index ab67298799f9..a1baf1fbe004 100644
--- a/drivers/regulator/max8998.c
+++ b/drivers/regulator/max8998.c
@@ -549,7 +549,7 @@ static __devinit int max8998_pmic_probe(struct platform_device *pdev)
         if (!max8998)
                 return -ENOMEM;
 
-        size = sizeof(struct regulator_dev *) * (pdata->num_regulators + 1);
+        size = sizeof(struct regulator_dev *) * pdata->num_regulators;
         max8998->rdev = kzalloc(size, GFP_KERNEL);
         if (!max8998->rdev) {
                 kfree(max8998);
@@ -557,7 +557,9 @@ static __devinit int max8998_pmic_probe(struct platform_device *pdev)
         }
 
         rdev = max8998->rdev;
+        max8998->dev = &pdev->dev;
         max8998->iodev = iodev;
+        max8998->num_regulators = pdata->num_regulators;
         platform_set_drvdata(pdev, max8998);
 
         for (i = 0; i < pdata->num_regulators; i++) {
@@ -583,7 +585,7 @@ static __devinit int max8998_pmic_probe(struct platform_device *pdev)
 
         return 0;
 err:
-        for (i = 0; i <= max8998->num_regulators; i++)
+        for (i = 0; i < max8998->num_regulators; i++)
                 if (rdev[i])
                         regulator_unregister(rdev[i]);
 
@@ -599,7 +601,7 @@ static int __devexit max8998_pmic_remove(struct platform_device *pdev)
         struct regulator_dev **rdev = max8998->rdev;
         int i;
 
-        for (i = 0; i <= max8998->num_regulators; i++)
+        for (i = 0; i < max8998->num_regulators; i++)
                 if (rdev[i])
                         regulator_unregister(rdev[i]);
 
diff --git a/drivers/regulator/tps6507x-regulator.c b/drivers/regulator/tps6507x-regulator.c
index c239f42aa4a3..020f5878d7ff 100644
--- a/drivers/regulator/tps6507x-regulator.c
+++ b/drivers/regulator/tps6507x-regulator.c
@@ -626,12 +626,6 @@ fail:
         return error;
 }
 
-/**
- * tps6507x_remove - TPS6507x driver i2c remove handler
- * @client: i2c driver client device structure
- *
- * Unregister TPS driver as an i2c client device driver
- */
 static int __devexit tps6507x_pmic_remove(struct platform_device *pdev)
 {
         struct tps6507x_dev *tps6507x_dev = platform_get_drvdata(pdev);
diff --git a/drivers/regulator/tps6586x-regulator.c b/drivers/regulator/tps6586x-regulator.c
index 8cff1413a147..51237fbb1bbb 100644
--- a/drivers/regulator/tps6586x-regulator.c
+++ b/drivers/regulator/tps6586x-regulator.c
@@ -133,7 +133,7 @@ static int tps6586x_ldo_get_voltage(struct regulator_dev *rdev)
         mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift;
         val = (val & mask) >> ri->volt_shift;
 
-        if (val > ri->desc.n_voltages)
+        if (val >= ri->desc.n_voltages)
                 BUG();
 
         return ri->voltages[val] * 1000;
@@ -150,7 +150,7 @@ static int tps6586x_dvm_set_voltage(struct regulator_dev *rdev,
         if (ret)
                 return ret;
 
-        return tps6586x_set_bits(parent, ri->go_reg, ri->go_bit);
+        return tps6586x_set_bits(parent, ri->go_reg, 1 << ri->go_bit);
 }
 
 static int tps6586x_regulator_enable(struct regulator_dev *rdev)
diff --git a/drivers/regulator/wm831x-ldo.c b/drivers/regulator/wm831x-ldo.c
index e686cdb61b97..9edf8f692341 100644
--- a/drivers/regulator/wm831x-ldo.c
+++ b/drivers/regulator/wm831x-ldo.c
@@ -215,8 +215,7 @@ static int wm831x_gp_ldo_set_mode(struct regulator_dev *rdev,
 
         case REGULATOR_MODE_IDLE:
                 ret = wm831x_set_bits(wm831x, ctrl_reg,
-                                      WM831X_LDO1_LP_MODE,
-                                      WM831X_LDO1_LP_MODE);
+                                      WM831X_LDO1_LP_MODE, 0);
                 if (ret < 0)
                         return ret;
 
@@ -225,10 +224,12 @@ static int wm831x_gp_ldo_set_mode(struct regulator_dev *rdev,
                                       WM831X_LDO1_ON_MODE);
                 if (ret < 0)
                         return ret;
+                break;
 
         case REGULATOR_MODE_STANDBY:
                 ret = wm831x_set_bits(wm831x, ctrl_reg,
-                                      WM831X_LDO1_LP_MODE, 0);
+                                      WM831X_LDO1_LP_MODE,
+                                      WM831X_LDO1_LP_MODE);
                 if (ret < 0)
                         return ret;
 
diff --git a/drivers/regulator/wm8350-regulator.c b/drivers/regulator/wm8350-regulator.c
index 0e6ed7db9364..fe4b8a8a9dfd 100644
--- a/drivers/regulator/wm8350-regulator.c
+++ b/drivers/regulator/wm8350-regulator.c
@@ -1129,7 +1129,7 @@ static unsigned int wm8350_dcdc_get_mode(struct regulator_dev *rdev)
                         mode = REGULATOR_MODE_NORMAL;
         } else if (!active && !sleep)
                 mode = REGULATOR_MODE_IDLE;
-        else if (!sleep)
+        else if (sleep)
                 mode = REGULATOR_MODE_STANDBY;
 
         return mode;
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index c9f3cc5949a8..3e5a51af757c 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -386,7 +386,15 @@ struct drm_connector_funcs {
         void (*dpms)(struct drm_connector *connector, int mode);
         void (*save)(struct drm_connector *connector);
         void (*restore)(struct drm_connector *connector);
-        enum drm_connector_status (*detect)(struct drm_connector *connector);
+
+        /* Check to see if anything is attached to the connector.
+         * @force is set to false whilst polling, true when checking the
+         * connector due to user request. @force can be used by the driver
+         * to avoid expensive, destructive operations during automated
+         * probing.
+         */
+        enum drm_connector_status (*detect)(struct drm_connector *connector,
+                                            bool force);
         int (*fill_modes)(struct drm_connector *connector, uint32_t max_width, uint32_t max_height);
         int (*set_property)(struct drm_connector *connector, struct drm_property *property,
                              uint64_t val);
diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h
index f11100f96482..25e02c941bac 100644
--- a/include/linux/workqueue.h
+++ b/include/linux/workqueue.h
@@ -235,6 +235,10 @@ static inline unsigned int work_static(struct work_struct *work) { return 0; }
 #define work_clear_pending(work) \
         clear_bit(WORK_STRUCT_PENDING_BIT, work_data_bits(work))
 
+/*
+ * Workqueue flags and constants.  For details, please refer to
+ * Documentation/workqueue.txt.
+ */
 enum {
         WQ_NON_REENTRANT        = 1 << 0, /* guarantee non-reentrance */
         WQ_UNBOUND              = 1 << 1, /* not bound to any cpu */
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 727f24e563ae..f77afd939229 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -1,19 +1,26 @@
 /*
- * linux/kernel/workqueue.c
+ * kernel/workqueue.c - generic async execution with shared worker pool
  *
- * Generic mechanism for defining kernel helper threads for running
- * arbitrary tasks in process context.
+ * Copyright (C) 2002           Ingo Molnar
  *
- * Started by Ingo Molnar, Copyright (C) 2002
+ *   Derived from the taskqueue/keventd code by:
+ *     David Woodhouse <dwmw2@infradead.org>
+ *     Andrew Morton
+ *     Kai Petzke <wpp@marie.physik.tu-berlin.de>
+ *     Theodore Ts'o <tytso@mit.edu>
  *
- * Derived from the taskqueue/keventd code by:
+ * Made to use alloc_percpu by Christoph Lameter.
  *
- *   David Woodhouse <dwmw2@infradead.org>
- *   Andrew Morton
- *   Kai Petzke <wpp@marie.physik.tu-berlin.de>
- *   Theodore Ts'o <tytso@mit.edu>
+ * Copyright (C) 2010           SUSE Linux Products GmbH
+ * Copyright (C) 2010           Tejun Heo <tj@kernel.org>
  *
- * Made to use alloc_percpu by Christoph Lameter.
+ * This is the generic async execution mechanism.  Work items as are
+ * executed in process context.  The worker pool is shared and
+ * automatically managed.  There is one worker pool for each CPU and
+ * one extra for works which are better served by workers which are
+ * not bound to any specific CPU.
+ *
+ * Please read Documentation/workqueue.txt for details.
  */
 
 #include <linux/module.h>