Merge branch 'linus' into perfcounters/core

Conflicts:
	arch/x86/include/asm/kmap_types.h
	include/linux/mm.h

	include/asm-generic/kmap_types.h

Merge reason: We crossed changes with kmap_types.h cleanups in mainline.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

4 files changed, 280 insertions, 12 deletions

diff --git a/include/asm-generic/atomic64.h b/include/asm-generic/atomic64.h
new file mode 100644
index 00000000000..b18ce4f9ee3
--- /dev/null
+++ b/include/asm-generic/atomic64.h
@@ -0,0 +1,42 @@
+/*
+ * Generic implementation of 64-bit atomics using spinlocks,
+ * useful on processors that don't have 64-bit atomic instructions.
+ *
+ * Copyright © 2009 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#ifndef _ASM_GENERIC_ATOMIC64_H
+#define _ASM_GENERIC_ATOMIC64_H
+
+typedef struct {
+	long long counter;
+} atomic64_t;
+
+#define ATOMIC64_INIT(i)	{ (i) }
+
+extern long long atomic64_read(const atomic64_t *v);
+extern void	 atomic64_set(atomic64_t *v, long long i);
+extern void	 atomic64_add(long long a, atomic64_t *v);
+extern long long atomic64_add_return(long long a, atomic64_t *v);
+extern void	 atomic64_sub(long long a, atomic64_t *v);
+extern long long atomic64_sub_return(long long a, atomic64_t *v);
+extern long long atomic64_dec_if_positive(atomic64_t *v);
+extern long long atomic64_cmpxchg(atomic64_t *v, long long o, long long n);
+extern long long atomic64_xchg(atomic64_t *v, long long new);
+extern int	 atomic64_add_unless(atomic64_t *v, long long a, long long u);
+
+#define atomic64_add_negative(a, v)	(atomic64_add_return((a), (v)) < 0)
+#define atomic64_inc(v)			atomic64_add(1LL, (v))
+#define atomic64_inc_return(v)		atomic64_add_return(1LL, (v))
+#define atomic64_inc_and_test(v) 	(atomic64_inc_return(v) == 0)
+#define atomic64_sub_and_test(a, v)	(atomic64_sub_return((a), (v)) == 0)
+#define atomic64_dec(v)			atomic64_sub(1LL, (v))
+#define atomic64_dec_return(v)		atomic64_sub_return(1LL, (v))
+#define atomic64_dec_and_test(v)	(atomic64_dec_return((v)) == 0)
+#define atomic64_inc_not_zero(v) 	atomic64_add_unless((v), 1LL, 0LL)
+
+#endif  /*  _ASM_GENERIC_ATOMIC64_H  */
diff --git a/include/asm-generic/errno.h b/include/asm-generic/errno.h
index e8852c092fe..28cc03bf19e 100644
--- a/include/asm-generic/errno.h
+++ b/include/asm-generic/errno.h
@@ -106,4 +106,6 @@
 #define	EOWNERDEAD	130	/* Owner died */
 #define	ENOTRECOVERABLE	131	/* State not recoverable */
 
+#define ERFKILL		132	/* Operation not possible due to RF-kill */
+
 #endif
diff --git a/include/asm-generic/kmap_types.h b/include/asm-generic/kmap_types.h
index 58c33055c30..eddbce0f9fb 100644
--- a/include/asm-generic/kmap_types.h
+++ b/include/asm-generic/kmap_types.h
@@ -1,7 +1,7 @@
 #ifndef _ASM_GENERIC_KMAP_TYPES_H
 #define _ASM_GENERIC_KMAP_TYPES_H
 
-#ifdef CONFIG_DEBUG_HIGHMEM
+#ifdef __WITH_KM_FENCE
 # define D(n) __KM_FENCE_##n ,
 #else
 # define D(n)
@@ -24,7 +24,10 @@ D(12)	KM_SOFTIRQ1,
 D(13)	KM_SYNC_ICACHE,
 D(14)	KM_SYNC_DCACHE,
 D(15)	KM_UML_USERCOPY, /* UML specific, for copy_*_user - used in do_op_one_page */
-D(16)	KM_TYPE_NR
+D(16)	KM_IRQ_PTE,
+D(17)	KM_NMI,
+D(18)	KM_NMI_PTE,
+D(19)	KM_TYPE_NR
 };
 
 #undef D
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index f1736ca7922..6bdba10fef4 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -1,4 +1,57 @@
-#include <linux/section-names.h>
+/*
+ * Helper macros to support writing architecture specific
+ * linker scripts.
+ *
+ * A minimal linker scripts has following content:
+ * [This is a sample, architectures may have special requiriements]
+ *
+ * OUTPUT_FORMAT(...)
+ * OUTPUT_ARCH(...)
+ * ENTRY(...)
+ * SECTIONS
+ * {
+ *	. = START;
+ *	__init_begin = .;
+ *	HEAD_TEXT_SECTION
+ *	INIT_TEXT_SECTION(PAGE_SIZE)
+ *	INIT_DATA_SECTION(...)
+ *	PERCPU(PAGE_SIZE)
+ *	__init_end = .;
+ *
+ *	_stext = .;
+ *	TEXT_SECTION = 0
+ *	_etext = .;
+ *
+ *      _sdata = .;
+ *	RO_DATA_SECTION(PAGE_SIZE)
+ *	RW_DATA_SECTION(...)
+ *	_edata = .;
+ *
+ *	EXCEPTION_TABLE(...)
+ *	NOTES
+ *
+ *	__bss_start = .;
+ *	BSS_SECTION(0, 0)
+ *	__bss_stop = .;
+ *	_end = .;
+ *
+ *	/DISCARD/ : {
+ *		EXIT_TEXT
+ *		EXIT_DATA
+ *		EXIT_CALL
+ *	}
+ *	STABS_DEBUG
+ *	DWARF_DEBUG
+ * }
+ *
+ * [__init_begin, __init_end] is the init section that may be freed after init
+ * [_stext, _etext] is the text section
+ * [_sdata, _edata] is the data section
+ *
+ * Some of the included output section have their own set of constants.
+ * Examples are: [__initramfs_start, __initramfs_end] for initramfs and
+ *               [__nosave_begin, __nosave_end] for the nosave data
+ */
 
 #ifndef LOAD_OFFSET
 #define LOAD_OFFSET 0
@@ -116,7 +169,36 @@
 	FTRACE_EVENTS()							\
 	TRACE_SYSCALLS()
 
-#define RO_DATA(align)							\
+/*
+ * Data section helpers
+ */
+#define NOSAVE_DATA							\
+	. = ALIGN(PAGE_SIZE);						\
+	VMLINUX_SYMBOL(__nosave_begin) = .;				\
+	*(.data.nosave)							\
+	. = ALIGN(PAGE_SIZE);						\
+	VMLINUX_SYMBOL(__nosave_end) = .;
+
+#define PAGE_ALIGNED_DATA(page_align)					\
+	. = ALIGN(page_align);						\
+	*(.data.page_aligned)
+
+#define READ_MOSTLY_DATA(align)						\
+	. = ALIGN(align);						\
+	*(.data.read_mostly)
+
+#define CACHELINE_ALIGNED_DATA(align)					\
+	. = ALIGN(align);						\
+	*(.data.cacheline_aligned)
+
+#define INIT_TASK(align)						\
+	. = ALIGN(align);						\
+	*(.data.init_task)
+
+/*
+ * Read only Data
+ */
+#define RO_DATA_SECTION(align)						\
 	. = ALIGN((align));						\
 	.rodata           : AT(ADDR(.rodata) - LOAD_OFFSET) {		\
 		VMLINUX_SYMBOL(__start_rodata) = .;			\
@@ -270,9 +352,10 @@
 	}								\
 	. = ALIGN((align));
 
-/* RODATA provided for backward compatibility.
+/* RODATA & RO_DATA provided for backward compatibility.
  * All archs are supposed to use RO_DATA() */
-#define RODATA RO_DATA(4096)
+#define RODATA          RO_DATA_SECTION(4096)
+#define RO_DATA(align)  RO_DATA_SECTION(align)
 
 #define SECURITY_INIT							\
 	.security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
@@ -330,16 +413,42 @@
 #endif
 
 /* Section used for early init (in .S files) */
-#define HEAD_TEXT  *(HEAD_TEXT_SECTION)
+#define HEAD_TEXT  *(.head.text)
+
+#define HEAD_TEXT_SECTION							\
+	.head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {		\
+		HEAD_TEXT						\
+	}
+
+/*
+ * Exception table
+ */
+#define EXCEPTION_TABLE(align)						\
+	. = ALIGN(align);						\
+	__ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {		\
+		VMLINUX_SYMBOL(__start___ex_table) = .;			\
+		*(__ex_table)						\
+		VMLINUX_SYMBOL(__stop___ex_table) = .;			\
+	}
+
+/*
+ * Init task
+ */
+#define INIT_TASK_DATA(align)						\
+	. = ALIGN(align);						\
+	.data.init_task : {						\
+		INIT_TASK						\
+	}
 
 /* init and exit section handling */
 #define INIT_DATA							\
 	*(.init.data)							\
 	DEV_DISCARD(init.data)						\
-	DEV_DISCARD(init.rodata)					\
 	CPU_DISCARD(init.data)						\
-	CPU_DISCARD(init.rodata)					\
 	MEM_DISCARD(init.data)						\
+	*(.init.rodata)							\
+	DEV_DISCARD(init.rodata)					\
+	CPU_DISCARD(init.rodata)					\
 	MEM_DISCARD(init.rodata)
 
 #define INIT_TEXT							\
@@ -363,9 +472,35 @@
 	CPU_DISCARD(exit.text)						\
 	MEM_DISCARD(exit.text)
 
-		/* DWARF debug sections.
-		Symbols in the DWARF debugging sections are relative to
-		the beginning of the section so we begin them at 0.  */
+#define EXIT_CALL							\
+	*(.exitcall.exit)
+
+/*
+ * bss (Block Started by Symbol) - uninitialized data
+ * zeroed during startup
+ */
+#define SBSS								\
+	.sbss : AT(ADDR(.sbss) - LOAD_OFFSET) {				\
+		*(.sbss)						\
+		*(.scommon)						\
+	}
+
+#define BSS(bss_align)							\
+	. = ALIGN(bss_align);						\
+	.bss : AT(ADDR(.bss) - LOAD_OFFSET) {				\
+		VMLINUX_SYMBOL(__bss_start) = .;			\
+		*(.bss.page_aligned)					\
+		*(.dynbss)						\
+		*(.bss)							\
+		*(COMMON)						\
+		VMLINUX_SYMBOL(__bss_stop) = .;				\
+	}
+
+/*
+ * DWARF debug sections.
+ * Symbols in the DWARF debugging sections are relative to
+ * the beginning of the section so we begin them at 0.
+ */
 #define DWARF_DEBUG							\
 		/* DWARF 1 */						\
 		.debug          0 : { *(.debug) }			\
@@ -432,6 +567,12 @@
 		VMLINUX_SYMBOL(__stop_notes) = .;			\
 	}
 
+#define INIT_SETUP(initsetup_align)					\
+		. = ALIGN(initsetup_align);				\
+		VMLINUX_SYMBOL(__setup_start) = .;			\
+		*(.init.setup)						\
+		VMLINUX_SYMBOL(__setup_end) = .;
+
 #define INITCALLS							\
 	*(.initcallearly.init)						\
 	VMLINUX_SYMBOL(__early_initcall_end) = .;			\
@@ -453,6 +594,31 @@
   	*(.initcall7.init)						\
   	*(.initcall7s.init)
 
+#define INIT_CALLS							\
+		VMLINUX_SYMBOL(__initcall_start) = .;			\
+		INITCALLS						\
+		VMLINUX_SYMBOL(__initcall_end) = .;
+
+#define CON_INITCALL							\
+		VMLINUX_SYMBOL(__con_initcall_start) = .;		\
+		*(.con_initcall.init)					\
+		VMLINUX_SYMBOL(__con_initcall_end) = .;
+
+#define SECURITY_INITCALL						\
+		VMLINUX_SYMBOL(__security_initcall_start) = .;		\
+		*(.security_initcall.init)				\
+		VMLINUX_SYMBOL(__security_initcall_end) = .;
+
+#ifdef CONFIG_BLK_DEV_INITRD
+#define INIT_RAM_FS							\
+	. = ALIGN(PAGE_SIZE);						\
+	VMLINUX_SYMBOL(__initramfs_start) = .;				\
+	*(.init.ramfs)							\
+	VMLINUX_SYMBOL(__initramfs_end) = .;
+#else
+#define INITRAMFS
+#endif
+
 /**
  * PERCPU_VADDR - define output section for percpu area
  * @vaddr: explicit base address (optional)
@@ -509,3 +675,58 @@
 		*(.data.percpu.shared_aligned)				\
 		VMLINUX_SYMBOL(__per_cpu_end) = .;			\
 	}
+
+
+/*
+ * Definition of the high level *_SECTION macros
+ * They will fit only a subset of the architectures
+ */
+
+
+/*
+ * Writeable data.
+ * All sections are combined in a single .data section.
+ * The sections following CONSTRUCTORS are arranged so their
+ * typical alignment matches.
+ * A cacheline is typical/always less than a PAGE_SIZE so
+ * the sections that has this restriction (or similar)
+ * is located before the ones requiring PAGE_SIZE alignment.
+ * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
+ * matches the requirment of PAGE_ALIGNED_DATA.
+ *
+ * use 0 as page_align if page_aligned data is not used */
+#define RW_DATA_SECTION(cacheline, nosave, pagealigned, inittask)	\
+	. = ALIGN(PAGE_SIZE);						\
+	.data : AT(ADDR(.data) - LOAD_OFFSET) {				\
+		INIT_TASK(inittask)					\
+		CACHELINE_ALIGNED_DATA(cacheline)			\
+		READ_MOSTLY_DATA(cacheline)				\
+		DATA_DATA						\
+		CONSTRUCTORS						\
+		NOSAVE_DATA(nosave)					\
+		PAGE_ALIGNED_DATA(pagealigned)				\
+	}
+
+#define INIT_TEXT_SECTION(inittext_align)				\
+	. = ALIGN(inittext_align);					\
+	.init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {		\
+		VMLINUX_SYMBOL(_sinittext) = .;				\
+		INIT_TEXT						\
+		VMLINUX_SYMBOL(_einittext) = .;				\
+	}
+
+#define INIT_DATA_SECTION(initsetup_align)				\
+	.init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {		\
+		INIT_DATA						\
+		INIT_SETUP(initsetup_align)				\
+		INIT_CALLS						\
+		CON_INITCALL						\
+		SECURITY_INITCALL					\
+		INIT_RAM_FS						\
+	}
+
+#define BSS_SECTION(sbss_align, bss_align)				\
+	SBSS								\
+	BSS(bss_align)							\
+	. = ALIGN(4);
+