Merge commit 'tip-core/auto-core-next'

10 files changed, 159 insertions, 17 deletions

diff --git a/include/asm-generic/percpu.h b/include/asm-generic/percpu.h
index b0e63c672ebd..36d188f47c98 100644
--- a/include/asm-generic/percpu.h
+++ b/include/asm-generic/percpu.h
@@ -45,7 +45,12 @@ extern unsigned long __per_cpu_offset[NR_CPUS];
  * Only S390 provides its own means of moving the pointer.
  */
 #ifndef SHIFT_PERCPU_PTR
-#define SHIFT_PERCPU_PTR(__p, __offset)	RELOC_HIDE((__p), (__offset))
+# ifdef CONFIG_HAVE_ZERO_BASED_PER_CPU
+#  define SHIFT_PERCPU_PTR(__p, __offset) \
+	((__typeof(__p))(((void *)(__p)) + (__offset)))
+# else
+#  define SHIFT_PERCPU_PTR(__p, __offset)	RELOC_HIDE((__p), (__offset))
+# endif /* CONFIG_HAVE_ZERO_BASED_PER_CPU */
 #endif
 
 /*
@@ -70,6 +75,8 @@ extern void setup_per_cpu_areas(void);
 #define per_cpu(var, cpu)			(*((void)(cpu), &per_cpu_var(var)))
 #define __get_cpu_var(var)			per_cpu_var(var)
 #define __raw_get_cpu_var(var)			per_cpu_var(var)
+#define SHIFT_PERCPU_PTR(__p, __offset)		(__p)
+#define per_cpu_offset(x)			0L
 
 #endif	/* SMP */
 
diff --git a/include/asm-generic/sections.h b/include/asm-generic/sections.h
index 8feeae1f2369..f697620c3e21 100644
--- a/include/asm-generic/sections.h
+++ b/include/asm-generic/sections.h
@@ -9,7 +9,17 @@ extern char __bss_start[], __bss_stop[];
 extern char __init_begin[], __init_end[];
 extern char _sinittext[], _einittext[];
 extern char _end[];
+#ifdef CONFIG_HAVE_ZERO_BASED_PER_CPU
+extern char __per_cpu_load[];
+extern char ____per_cpu_size[];
+#define __per_cpu_size ((unsigned long)&____per_cpu_size)
+#define __per_cpu_start ((char *)0)
+#define __per_cpu_end ((char *)__per_cpu_size)
+#else
 extern char __per_cpu_start[], __per_cpu_end[];
+#define __per_cpu_load __per_cpu_start
+#define __per_cpu_size (__per_cpu_end - __per_cpu_start)
+#endif
 extern char __kprobes_text_start[], __kprobes_text_end[];
 extern char __initdata_begin[], __initdata_end[];
 extern char __start_rodata[], __end_rodata[];
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index f054778e916c..b3d2a3868775 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -67,6 +67,8 @@
 		*(.rodata1)						\
 	}								\
 									\
+	BUG_TABLE							\
+									\
 	/* PCI quirks */						\
 	.pci_fixup        : AT(ADDR(.pci_fixup) - LOAD_OFFSET) {	\
 		VMLINUX_SYMBOL(__start_pci_fixups_early) = .;		\
@@ -310,6 +312,7 @@
 		.stab.indexstr 0 : { *(.stab.indexstr) }		\
 		.comment 0 : { *(.comment) }
 
+#ifdef CONFIG_GENERIC_BUG
 #define BUG_TABLE							\
 	. = ALIGN(8);							\
 	__bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) {		\
@@ -317,6 +320,9 @@
 		*(__bug_table)						\
 		__stop___bug_table = .;					\
 	}
+#else
+#define BUG_TABLE
+#endif
 
 #define NOTES								\
 	.notes : AT(ADDR(.notes) - LOAD_OFFSET) {			\
@@ -344,11 +350,28 @@
   	*(.initcall7.init)						\
   	*(.initcall7s.init)
 
+#ifdef CONFIG_HAVE_ZERO_BASED_PER_CPU
+#define PERCPU(align)							\
+	. = ALIGN(align);						\
+	percpu : { } :percpu						\
+	__per_cpu_load = .;						\
+	.data.percpu 0 : AT(__per_cpu_load - LOAD_OFFSET) {		\
+		*(.data.percpu.first)					\
+		*(.data.percpu.shared_aligned)				\
+		*(.data.percpu)						\
+		*(.data.percpu.page_aligned)				\
+		____per_cpu_size = .;					\
+	}								\
+	. = __per_cpu_load + ____per_cpu_size;				\
+	data : { } :data
+#else
 #define PERCPU(align)							\
 	. = ALIGN(align);						\
 	__per_cpu_start = .;						\
 	.data.percpu  : AT(ADDR(.data.percpu) - LOAD_OFFSET) {		\
+		*(.data.percpu.page_aligned)				\
 		*(.data.percpu)						\
 		*(.data.percpu.shared_aligned)				\
 	}								\
 	__per_cpu_end = .;
+#endif
diff --git a/include/asm-x86/percpu.h b/include/asm-x86/percpu.h
index 736fc3bb8e1e..d85e5aaca7b1 100644
--- a/include/asm-x86/percpu.h
+++ b/include/asm-x86/percpu.h
@@ -108,6 +108,11 @@ do {							\
 		    : "+m" (var)			\
 		    : "ri" ((T__)val));			\
 		break;					\
+	case 8:						\
+		asm(op "q %1,"__percpu_seg"%0"		\
+		    : "+m" (var)			\
+		    : "ri" ((T__)val));			\
+		break;					\
 	default: __bad_percpu_size();			\
 	}						\
 } while (0)
@@ -131,16 +136,84 @@ do {							\
 		    : "=r" (ret__)			\
 		    : "m" (var));			\
 		break;					\
+	case 8:						\
+		asm(op "q "__percpu_seg"%1,%0"		\
+		    : "=r" (ret__)			\
+		    : "m" (var));			\
+		break;					\
 	default: __bad_percpu_size();			\
 	}						\
 	ret__;						\
 })
 
-#define x86_read_percpu(var) percpu_from_op("mov", per_cpu__##var)
-#define x86_write_percpu(var, val) percpu_to_op("mov", per_cpu__##var, val)
-#define x86_add_percpu(var, val) percpu_to_op("add", per_cpu__##var, val)
-#define x86_sub_percpu(var, val) percpu_to_op("sub", per_cpu__##var, val)
-#define x86_or_percpu(var, val) percpu_to_op("or", per_cpu__##var, val)
+#define percpu_addr_op(op, var)				\
+({							\
+	switch (sizeof(var)) {				\
+	case 1:						\
+		asm(op "b "__percpu_seg"%0"		\
+				: : "m"(var));		\
+		break;					\
+	case 2:						\
+		asm(op "w "__percpu_seg"%0"		\
+				: : "m"(var));		\
+		break;					\
+	case 4:						\
+		asm(op "l "__percpu_seg"%0"		\
+				: : "m"(var));		\
+		break;					\
+	case 8:						\
+		asm(op "q "__percpu_seg"%0"		\
+				: : "m"(var));		\
+		break;					\
+	default: __bad_percpu_size();			\
+	}						\
+})
+
+#define percpu_cmpxchg_op(var, old, new)				\
+({									\
+	typeof(var) prev;						\
+	switch (sizeof(var)) {						\
+	case 1:								\
+		asm("cmpxchgb %b1, "__percpu_seg"%2"			\
+				     : "=a"(prev)			\
+				     : "q"(new), "m"(var), "0"(old)	\
+				     : "memory");			\
+		break;							\
+	case 2:								\
+		asm("cmpxchgw %w1, "__percpu_seg"%2"			\
+				     : "=a"(prev)			\
+				     : "r"(new), "m"(var), "0"(old)	\
+				     : "memory");			\
+		break;							\
+	case 4:								\
+		asm("cmpxchgl %k1, "__percpu_seg"%2"			\
+				     : "=a"(prev)			\
+				     : "r"(new), "m"(var), "0"(old)	\
+				     : "memory");			\
+		break;							\
+	case 8:								\
+		asm("cmpxchgq %1, "__percpu_seg"%2"			\
+				     : "=a"(prev)			\
+				     : "r"(new), "m"(var), "0"(old)	\
+				     : "memory");			\
+		break;							\
+	default:							\
+		__bad_percpu_size();					\
+	}								\
+	return prev;							\
+})
+
+#define x86_read_percpu(var) percpu_from_op("mov", per_cpu_var(var))
+#define x86_write_percpu(var, val) percpu_to_op("mov", per_cpu_var(var), val)
+#define x86_add_percpu(var, val) percpu_to_op("add", per_cpu_var(var), val)
+#define x86_sub_percpu(var, val) percpu_to_op("sub", per_cpu_var(var), val)
+#define x86_inc_percpu(var) percpu_addr_op("inc", per_cpu_var(var))
+#define x86_dec_percpu(var) percpu_addr_op("dec", per_cpu_var(var))
+#define x86_or_percpu(var, val) percpu_to_op("or", per_cpu_var(var), val)
+#define x86_xchg_percpu(var, val) percpu_to_op("xchg", per_cpu_var(var), val)
+#define x86_cmpxchg_percpu(var, old, new) \
+				percpu_cmpxchg_op(per_cpu_var(var), old, new)
+
 #endif /* !__ASSEMBLY__ */
 #endif /* !CONFIG_X86_64 */
 #endif /* _ASM_X86_PERCPU_H_ */
diff --git a/include/linux/bootmem.h b/include/linux/bootmem.h
index 6a5dbdc8a7dc..686895bacd9d 100644
--- a/include/linux/bootmem.h
+++ b/include/linux/bootmem.h
@@ -94,7 +94,7 @@ extern unsigned long init_bootmem_node(pg_data_t *pgdat,
 				       unsigned long freepfn,
 				       unsigned long startpfn,
 				       unsigned long endpfn);
-extern void reserve_bootmem_node(pg_data_t *pgdat,
+extern int reserve_bootmem_node(pg_data_t *pgdat,
 				 unsigned long physaddr,
 				 unsigned long size,
 				 int flags);
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index f1fc7470d26c..a86186dd0474 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -285,12 +285,11 @@ enum
 struct softirq_action
 {
 	void	(*action)(struct softirq_action *);
-	void	*data;
 };
 
 asmlinkage void do_softirq(void);
 asmlinkage void __do_softirq(void);
-extern void open_softirq(int nr, void (*action)(struct softirq_action*), void *data);
+extern void open_softirq(int nr, void (*action)(struct softirq_action *));
 extern void softirq_init(void);
 #define __raise_softirq_irqoff(nr) do { or_softirq_pending(1UL << (nr)); } while (0)
 extern void raise_softirq_irqoff(unsigned int nr);
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 792bf0aa779b..f2a668c195bf 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -184,9 +184,6 @@ asmlinkage int vprintk(const char *fmt, va_list args)
 	__attribute__ ((format (printf, 1, 0)));
 asmlinkage int printk(const char * fmt, ...)
 	__attribute__ ((format (printf, 1, 2))) __cold;
-extern int log_buf_get_len(void);
-extern int log_buf_read(int idx);
-extern int log_buf_copy(char *dest, int idx, int len);
 
 extern int printk_ratelimit_jiffies;
 extern int printk_ratelimit_burst;
@@ -202,9 +199,6 @@ static inline int vprintk(const char *s, va_list args) { return 0; }
 static inline int printk(const char *s, ...)
 	__attribute__ ((format (printf, 1, 2)));
 static inline int __cold printk(const char *s, ...) { return 0; }
-static inline int log_buf_get_len(void) { return 0; }
-static inline int log_buf_read(int idx) { return 0; }
-static inline int log_buf_copy(char *dest, int idx, int len) { return 0; }
 static inline int printk_ratelimit(void) { return 0; }
 static inline int __printk_ratelimit(int ratelimit_jiffies, \
 				     int ratelimit_burst) { return 0; }
diff --git a/include/linux/percpu.h b/include/linux/percpu.h
index 4cdd393e71e1..3d1a7f6cc738 100644
--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -23,13 +23,35 @@
 	__attribute__((__section__(SHARED_ALIGNED_SECTION)))		\
 	PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name		\
 	____cacheline_aligned_in_smp
+
+#define DEFINE_PER_CPU_PAGE_ALIGNED(type, name)			\
+	__attribute__((__section__(".data.percpu.page_aligned")))	\
+	PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name
+
+#ifdef CONFIG_HAVE_ZERO_BASED_PER_CPU
+#define DEFINE_PER_CPU_FIRST(type, name)				\
+	__attribute__((__section__(".data.percpu.first")))		\
+	PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name
 #else
+#define DEFINE_PER_CPU_FIRST(type, name)				\
+	DEFINE_PER_CPU(type, name)
+#endif
+
+#else /* !CONFIG_SMP */
+
 #define DEFINE_PER_CPU(type, name)					\
 	PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name
 
 #define DEFINE_PER_CPU_SHARED_ALIGNED(type, name)		      \
 	DEFINE_PER_CPU(type, name)
-#endif
+
+#define DEFINE_PER_CPU_PAGE_ALIGNED(type, name)		      \
+	DEFINE_PER_CPU(type, name)
+
+#define DEFINE_PER_CPU_FIRST(type, name)				\
+	DEFINE_PER_CPU(type, name)
+
+#endif /* !CONFIG_SMP */
 
 #define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
 #define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index c5d3f847ca8d..69760a379b6d 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -294,10 +294,11 @@ extern void softlockup_tick(void);
 extern void spawn_softlockup_task(void);
 extern void touch_softlockup_watchdog(void);
 extern void touch_all_softlockup_watchdogs(void);
-extern unsigned long  softlockup_thresh;
+extern unsigned int  softlockup_panic;
 extern unsigned long sysctl_hung_task_check_count;
 extern unsigned long sysctl_hung_task_timeout_secs;
 extern unsigned long sysctl_hung_task_warnings;
+extern int softlockup_thresh;
 #else
 static inline void softlockup_tick(void)
 {
diff --git a/include/linux/topology.h b/include/linux/topology.h
index 24f3d2282e11..2158fc0d5a56 100644
--- a/include/linux/topology.h
+++ b/include/linux/topology.h
@@ -179,4 +179,17 @@ void arch_update_cpu_topology(void);
 #endif
 #endif /* CONFIG_NUMA */
 
+#ifndef topology_physical_package_id
+#define topology_physical_package_id(cpu)	((void)(cpu), -1)
+#endif
+#ifndef topology_core_id
+#define topology_core_id(cpu)			((void)(cpu), 0)
+#endif
+#ifndef topology_thread_siblings
+#define topology_thread_siblings(cpu)		cpumask_of_cpu(cpu)
+#endif
+#ifndef topology_core_siblings
+#define topology_core_siblings(cpu)		cpumask_of_cpu(cpu)
+#endif
+
 #endif /* _LINUX_TOPOLOGY_H */