11 files changed, 129 insertions, 48 deletions

diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index 12731a19ef06..350459910fe1 100644
--- a/include/linux/backing-dev.h
+++ b/include/linux/backing-dev.h
@@ -254,6 +254,7 @@ int bdi_set_max_ratio(struct backing_dev_info *bdi, unsigned int max_ratio);
 #define BDI_CAP_EXEC_MAP        0x00000040
 #define BDI_CAP_NO_ACCT_WB      0x00000080
 #define BDI_CAP_SWAP_BACKED     0x00000100
+#define BDI_CAP_STABLE_WRITES   0x00000200
 
 #define BDI_CAP_VMFLAGS \
         (BDI_CAP_READ_MAP | BDI_CAP_WRITE_MAP | BDI_CAP_EXEC_MAP)
@@ -308,6 +309,11 @@ long wait_iff_congested(struct zone *zone, int sync, long timeout);
 int pdflush_proc_obsolete(struct ctl_table *table, int write,
                 void __user *buffer, size_t *lenp, loff_t *ppos);
 
+static inline bool bdi_cap_stable_pages_required(struct backing_dev_info *bdi)
+{
+        return bdi->capabilities & BDI_CAP_STABLE_WRITES;
+}
+
 static inline bool bdi_cap_writeback_dirty(struct backing_dev_info *bdi)
 {
         return !(bdi->capabilities & BDI_CAP_NO_WRITEBACK);
diff --git a/include/linux/bug.h b/include/linux/bug.h
index b1cf40de847e..7f4818673c41 100644
--- a/include/linux/bug.h
+++ b/include/linux/bug.h
@@ -2,6 +2,7 @@
 #define _LINUX_BUG_H
 
 #include <asm/bug.h>
+#include <linux/compiler.h>
 
 enum bug_trap_type {
         BUG_TRAP_TYPE_NONE = 0,
@@ -12,11 +13,12 @@ enum bug_trap_type {
 struct pt_regs;
 
 #ifdef __CHECKER__
-#define BUILD_BUG_ON_NOT_POWER_OF_2(n)
+#define BUILD_BUG_ON_NOT_POWER_OF_2(n) (0)
 #define BUILD_BUG_ON_ZERO(e) (0)
 #define BUILD_BUG_ON_NULL(e) ((void*)0)
 #define BUILD_BUG_ON_INVALID(e) (0)
-#define BUILD_BUG_ON(condition)
+#define BUILD_BUG_ON_MSG(cond, msg) (0)
+#define BUILD_BUG_ON(condition) (0)
 #define BUILD_BUG() (0)
 #else /* __CHECKER__ */
 
@@ -39,29 +41,37 @@ struct pt_regs;
 #define BUILD_BUG_ON_INVALID(e) ((void)(sizeof((__force long)(e))))
 
 /**
+ * BUILD_BUG_ON_MSG - break compile if a condition is true & emit supplied
+ *                    error message.
+ * @condition: the condition which the compiler should know is false.
+ *
+ * See BUILD_BUG_ON for description.
+ */
+#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
+
+/**
  * BUILD_BUG_ON - break compile if a condition is true.
  * @condition: the condition which the compiler should know is false.
  *
  * If you have some code which relies on certain constants being equal, or
- * other compile-time-evaluated condition, you should use BUILD_BUG_ON to
+ * some other compile-time-evaluated condition, you should use BUILD_BUG_ON to
  * detect if someone changes it.
  *
- * The implementation uses gcc's reluctance to create a negative array, but
- * gcc (as of 4.4) only emits that error for obvious cases (eg. not arguments
- * to inline functions).  So as a fallback we use the optimizer; if it can't
- * prove the condition is false, it will cause a link error on the undefined
- * "__build_bug_on_failed".  This error message can be harder to track down
- * though, hence the two different methods.
+ * The implementation uses gcc's reluctance to create a negative array, but gcc
+ * (as of 4.4) only emits that error for obvious cases (e.g. not arguments to
+ * inline functions).  Luckily, in 4.3 they added the "error" function
+ * attribute just for this type of case.  Thus, we use a negative sized array
+ * (should always create an error on gcc versions older than 4.4) and then call
+ * an undefined function with the error attribute (should always create an
+ * error on gcc 4.3 and later).  If for some reason, neither creates a
+ * compile-time error, we'll still have a link-time error, which is harder to
+ * track down.
  */
 #ifndef __OPTIMIZE__
 #define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
 #else
-extern int __build_bug_on_failed;
-#define BUILD_BUG_ON(condition)                                 \
-        do {                                                    \
-                ((void)sizeof(char[1 - 2*!!(condition)]));      \
-                if (condition) __build_bug_on_failed = 1;       \
-        } while(0)
+#define BUILD_BUG_ON(condition) \
+        BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
 #endif
 
 /**
@@ -71,12 +81,7 @@ extern int __build_bug_on_failed;
  * build time, you should use BUILD_BUG to detect if it is
  * unexpectedly used.
  */
-#define BUILD_BUG()                                             \
-        do {                                                    \
-                extern void __build_bug_failed(void)            \
-                        __linktime_error("BUILD_BUG failed");   \
-                __build_bug_failed();                           \
-        } while (0)
+#define BUILD_BUG() BUILD_BUG_ON_MSG(1, "BUILD_BUG failed")
 
 #endif  /* __CHECKER__ */
 
diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h
index 6a6d7aefe12d..24545cd90a25 100644
--- a/include/linux/compiler-gcc.h
+++ b/include/linux/compiler-gcc.h
@@ -5,6 +5,9 @@
 /*
  * Common definitions for all gcc versions go here.
  */
+#define GCC_VERSION (__GNUC__ * 10000 \
+                   + __GNUC_MINOR__ * 100 \
+                   + __GNUC_PATCHLEVEL__)
 
 
 /* Optimization barrier */
diff --git a/include/linux/compiler-gcc3.h b/include/linux/compiler-gcc3.h
index 37d412436d0f..7d89febe4d79 100644
--- a/include/linux/compiler-gcc3.h
+++ b/include/linux/compiler-gcc3.h
@@ -2,22 +2,22 @@
 #error "Please don't include <linux/compiler-gcc3.h> directly, include <linux/compiler.h> instead."
 #endif
 
-#if __GNUC_MINOR__ < 2
+#if GCC_VERSION < 30200
 # error Sorry, your compiler is too old - please upgrade it.
 #endif
 
-#if __GNUC_MINOR__ >= 3
+#if GCC_VERSION >= 30300
 # define __used                 __attribute__((__used__))
 #else
 # define __used                 __attribute__((__unused__))
 #endif
 
-#if __GNUC_MINOR__ >= 4
+#if GCC_VERSION >= 30400
 #define __must_check            __attribute__((warn_unused_result))
 #endif
 
 #ifdef CONFIG_GCOV_KERNEL
-# if __GNUC_MINOR__ < 4
+# if GCC_VERSION < 30400
 #   error "GCOV profiling support for gcc versions below 3.4 not included"
 # endif /* __GNUC_MINOR__ */
 #endif /* CONFIG_GCOV_KERNEL */
diff --git a/include/linux/compiler-gcc4.h b/include/linux/compiler-gcc4.h
index 662fd1b4c42a..68b162d92254 100644
--- a/include/linux/compiler-gcc4.h
+++ b/include/linux/compiler-gcc4.h
@@ -4,7 +4,7 @@
 
 /* GCC 4.1.[01] miscompiles __weak */
 #ifdef __KERNEL__
-# if __GNUC_MINOR__ == 1 && __GNUC_PATCHLEVEL__ <= 1
+# if GCC_VERSION >= 40100 &&  GCC_VERSION <= 40101
 #  error Your version of gcc miscompiles the __weak directive
 # endif
 #endif
@@ -13,7 +13,11 @@
 #define __must_check            __attribute__((warn_unused_result))
 #define __compiler_offsetof(a,b) __builtin_offsetof(a,b)
 
-#if __GNUC_MINOR__ >= 3
+#if GCC_VERSION >= 40100
+# define __compiletime_object_size(obj) __builtin_object_size(obj, 0)
+#endif
+
+#if GCC_VERSION >= 40300
 /* Mark functions as cold. gcc will assume any path leading to a call
    to them will be unlikely.  This means a lot of manual unlikely()s
    are unnecessary now for any paths leading to the usual suspects
@@ -29,11 +33,15 @@
    the kernel context */
 #define __cold                  __attribute__((__cold__))
 
-#define __linktime_error(message) __attribute__((__error__(message)))
-
 #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
 
-#if __GNUC_MINOR__ >= 5
+#ifndef __CHECKER__
+# define __compiletime_warning(message) __attribute__((warning(message)))
+# define __compiletime_error(message) __attribute__((error(message)))
+#endif /* __CHECKER__ */
+#endif /* GCC_VERSION >= 40300 */
+
+#if GCC_VERSION >= 40500
 /*
  * Mark a position in code as unreachable.  This can be used to
  * suppress control flow warnings after asm blocks that transfer
@@ -48,30 +56,22 @@
 /* Mark a function definition as prohibited from being cloned. */
 #define __noclone       __attribute__((__noclone__))
 
-#endif
-#endif
+#endif /* GCC_VERSION >= 40500 */
 
-#if __GNUC_MINOR__ >= 6
+#if GCC_VERSION >= 40600
 /*
  * Tell the optimizer that something else uses this function or variable.
  */
 #define __visible __attribute__((externally_visible))
 #endif
 
-#if __GNUC_MINOR__ > 0
-#define __compiletime_object_size(obj) __builtin_object_size(obj, 0)
-#endif
-#if __GNUC_MINOR__ >= 3 && !defined(__CHECKER__)
-#define __compiletime_warning(message) __attribute__((warning(message)))
-#define __compiletime_error(message) __attribute__((error(message)))
-#endif
 
 #ifdef CONFIG_ARCH_USE_BUILTIN_BSWAP
-#if __GNUC_MINOR__ >= 4
+#if GCC_VERSION >= 40400
 #define __HAVE_BUILTIN_BSWAP32__
 #define __HAVE_BUILTIN_BSWAP64__
 #endif
-#if __GNUC_MINOR__ >= 8 || (defined(__powerpc__) && __GNUC_MINOR__ >= 6)
+#if GCC_VERSION >= 40800 || (defined(__powerpc__) && GCC_VERSION >= 40600)
 #define __HAVE_BUILTIN_BSWAP16__
 #endif
-#endif
+#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index dd852b73b286..10b8f23fab0f 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -307,10 +307,36 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect);
 #endif
 #ifndef __compiletime_error
 # define __compiletime_error(message)
+# define __compiletime_error_fallback(condition) \
+        do { ((void)sizeof(char[1 - 2 * condition])); } while (0)
+#else
+# define __compiletime_error_fallback(condition) do { } while (0)
 #endif
-#ifndef __linktime_error
-# define __linktime_error(message)
-#endif
+
+#define __compiletime_assert(condition, msg, prefix, suffix)            \
+        do {                                                            \
+                bool __cond = !(condition);                             \
+                extern void prefix ## suffix(void) __compiletime_error(msg); \
+                if (__cond)                                             \
+                        prefix ## suffix();                             \
+                __compiletime_error_fallback(__cond);                   \
+        } while (0)
+
+#define _compiletime_assert(condition, msg, prefix, suffix) \
+        __compiletime_assert(condition, msg, prefix, suffix)
+
+/**
+ * compiletime_assert - break build and emit msg if condition is false
+ * @condition: a compile-time constant condition to check
+ * @msg:       a message to emit if condition is false
+ *
+ * In tradition of POSIX assert, this macro will break the build if the
+ * supplied condition is *false*, emitting the supplied error message if the
+ * compiler has support to do so.
+ */
+#define compiletime_assert(condition, msg) \
+        _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
+
 /*
  * Prevent the compiler from merging or refetching accesses.  The compiler
  * is also forbidden from reordering successive instances of ACCESS_ONCE(),
diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index 2bca44b0893c..bfe88c4aa251 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -359,7 +359,9 @@ extern void lockdep_trace_alloc(gfp_t mask);
 
 #define lockdep_depth(tsk)      (debug_locks ? (tsk)->lockdep_depth : 0)
 
-#define lockdep_assert_held(l)  WARN_ON(debug_locks && !lockdep_is_held(l))
+#define lockdep_assert_held(l)  do {                            \
+                WARN_ON(debug_locks && !lockdep_is_held(l));    \
+        } while (0)
 
 #define lockdep_recursing(tsk)  ((tsk)->lockdep_recursion)
 
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 6da609d14c15..0e38e13eb249 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -414,6 +414,7 @@ static inline void wait_on_page_writeback(struct page *page)
 }
 
 extern void end_page_writeback(struct page *page);
+void wait_for_stable_page(struct page *page);
 
 /*
  * Add an arbitrary waiter to a page's wait queue
diff --git a/include/linux/platform_data/lp855x.h b/include/linux/platform_data/lp855x.h
index e81f62d24ee2..20ee8b221dbd 100644
--- a/include/linux/platform_data/lp855x.h
+++ b/include/linux/platform_data/lp855x.h
@@ -49,12 +49,24 @@
 #define LP8556_FAST_CONFIG      BIT(7) /* use it if EPROMs should be maintained
                                           when exiting the low power mode */
 
+/* CONFIG register - LP8557 */
+#define LP8557_PWM_STANDBY      BIT(7)
+#define LP8557_PWM_FILTER       BIT(6)
+#define LP8557_RELOAD_EPROM     BIT(3)  /* use it if EPROMs should be reset
+                                           when the backlight turns on */
+#define LP8557_OFF_OPENLEDS     BIT(2)
+#define LP8557_PWM_CONFIG       LP8557_PWM_ONLY
+#define LP8557_I2C_CONFIG       LP8557_I2C_ONLY
+#define LP8557_COMB1_CONFIG     LP8557_COMBINED1
+#define LP8557_COMB2_CONFIG     LP8557_COMBINED2
+
 enum lp855x_chip_id {
         LP8550,
         LP8551,
         LP8552,
         LP8553,
         LP8556,
+        LP8557,
 };
 
 enum lp855x_brightness_ctrl_mode {
@@ -89,6 +101,13 @@ enum lp8556_brightness_source {
         LP8556_COMBINED2,       /* pwm + i2c after the shaper block */
 };
 
+enum lp8557_brightness_source {
+        LP8557_PWM_ONLY,
+        LP8557_I2C_ONLY,
+        LP8557_COMBINED1,       /* pwm + i2c after the shaper block */
+        LP8557_COMBINED2,       /* pwm + i2c before the shaper block */
+};
+
 struct lp855x_rom_data {
         u8 addr;
         u8 val;
diff --git a/include/linux/printk.h b/include/linux/printk.h
index 5bef3045218e..1249a54d17e0 100644
--- a/include/linux/printk.h
+++ b/include/linux/printk.h
@@ -252,6 +252,15 @@ extern void dump_stack(void) __cold;
         printk_once(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
 #define pr_cont_once(fmt, ...)                                  \
         printk_once(KERN_CONT pr_fmt(fmt), ##__VA_ARGS__)
+
+#if defined(DEBUG)
+#define pr_devel_once(fmt, ...)                                 \
+        printk_once(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
+#else
+#define pr_devel_once(fmt, ...)                                 \
+        no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
+#endif
+
 /* If you are writing a driver, please use dev_dbg instead */
 #if defined(DEBUG)
 #define pr_debug_once(fmt, ...)                                 \
@@ -295,6 +304,15 @@ extern void dump_stack(void) __cold;
 #define pr_info_ratelimited(fmt, ...)                                   \
         printk_ratelimited(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
 /* no pr_cont_ratelimited, don't do that... */
+
+#if defined(DEBUG)
+#define pr_devel_ratelimited(fmt, ...)                                  \
+        printk_ratelimited(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
+#else
+#define pr_devel_ratelimited(fmt, ...)                                  \
+        no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
+#endif
+
 /* If you are writing a driver, please use dev_dbg instead */
 #if defined(DEBUG)
 #define pr_debug_ratelimited(fmt, ...)                                  \
diff --git a/include/linux/smp.h b/include/linux/smp.h
index dd6f06be3c9f..3e07a7df6478 100644
--- a/include/linux/smp.h
+++ b/include/linux/smp.h
@@ -89,7 +89,8 @@ void kick_all_cpus_sync(void);
 #ifdef CONFIG_USE_GENERIC_SMP_HELPERS
 void __init call_function_init(void);
 void generic_smp_call_function_single_interrupt(void);
-void generic_smp_call_function_interrupt(void);
+#define generic_smp_call_function_interrupt \
+        generic_smp_call_function_single_interrupt
 #else
 static inline void call_function_init(void) { }
 #endif