Merge branch 'akpm' (updates from Andrew Morton)

Merge second patch-bomb from Andrew Morton:
 - misc fixes
 - audit stuff
 - fanotify/inotify/dnotify things
 - most of the rest of MM.  The new cache shrinker code from Glauber and
   Dave Chinner probably isn't quite stabilized yet.
 - ptrace
 - ipc
 - partitions
 - reboot cleanups
 - add LZ4 decompressor, use it for kernel compression

* emailed patches from Andrew Morton <[email protected]>: (118 commits)
  lib/scatterlist: error handling in __sg_alloc_table()
  scsi_debug: fix do_device_access() with wrap around range
  crypto: talitos: use sg_pcopy_to_buffer()
  lib/scatterlist: introduce sg_pcopy_from_buffer() and sg_pcopy_to_buffer()
  lib/scatterlist: factor out sg_miter_get_next_page() from sg_miter_next()
  crypto: add lz4 Cryptographic API
  lib: add lz4 compressor module
  arm: add support for LZ4-compressed kernel
  lib: add support for LZ4-compressed kernel
  decompressor: add LZ4 decompressor module
  lib: add weak clz/ctz functions
  reboot: move arch/x86 reboot= handling to generic kernel
  reboot: arm: change reboot_mode to use enum reboot_mode
  reboot: arm: prepare reboot_mode for moving to generic kernel code
  reboot: arm: remove unused restart_mode fields from some arm subarchs
  reboot: unicore32: prepare reboot_mode for moving to generic kernel code
  reboot: x86: prepare reboot_mode for moving to generic kernel code
  reboot: checkpatch.pl the new kernel/reboot.c file
  reboot: move shutdown/reboot related functions to kernel/reboot.c
  reboot: remove -stable friendly PF_THREAD_BOUND define
  ...

Author: torvalds

Documentation/kernel-parameters.txt

@@ -2681,9 +2681,17 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 			Run specified binary instead of /init from the ramdisk,
 			used for early userspace startup. See initrd.
 
-	reboot=		[BUGS=X86-32,BUGS=ARM,BUGS=IA-64] Rebooting mode
-			Format: <reboot_mode>[,<reboot_mode2>[,...]]
-			See arch/*/kernel/reboot.c or arch/*/kernel/process.c
+	reboot=		[KNL]
+			Format (x86 or x86_64):
+				[w[arm] | c[old] | h[ard] | s[oft] | g[pio]] \
+				[[,]s[mp]#### \
+				[[,]b[ios] | a[cpi] | k[bd] | t[riple] | e[fi] | p[ci]] \
+				[[,]f[orce]
+			Where reboot_mode is one of warm (soft) or cold (hard) or gpio,
+			      reboot_type is one of bios, acpi, kbd, triple, efi, or pci,
+			      reboot_force is either force or not specified,
+			      reboot_cpu is s[mp]#### with #### being the processor
+					to be used for rebooting.
 
 	relax_domain_level=
 			[KNL, SMP] Set scheduler's default relax_domain_level.

Documentation/sysctl/vm.txt

@@ -510,7 +510,7 @@ Specify "[Dd]efault" to request automatic configuration.  Autoconfiguration
 will select "node" order in following case.
 (1) if the DMA zone does not exist or
 (2) if the DMA zone comprises greater than 50% of the available memory or
-(3) if any node's DMA zone comprises greater than 60% of its local memory and
+(3) if any node's DMA zone comprises greater than 70% of its local memory and
     the amount of local memory is big enough.
 
 Otherwise, "zone" order will be selected. Default order is recommended unless

Documentation/vm/transhuge.txt

@@ -120,8 +120,8 @@ By default kernel tries to use huge zero page on read page fault.
 It's possible to disable huge zero page by writing 0 or enable it
 back by writing 1:
 
-echo 0 >/sys/kernel/mm/transparent_hugepage/khugepaged/use_zero_page
-echo 1 >/sys/kernel/mm/transparent_hugepage/khugepaged/use_zero_page
+echo 0 >/sys/kernel/mm/transparent_hugepage/use_zero_page
+echo 1 >/sys/kernel/mm/transparent_hugepage/use_zero_page
 
 khugepaged will be automatically started when
 transparent_hugepage/enabled is set to "always" or "madvise, and it'll

Documentation/x86/boot.txt

@@ -657,9 +657,10 @@ Protocol:	2.08+
   uncompressed data should be determined using the standard magic
   numbers.  The currently supported compression formats are gzip
   (magic numbers 1F 8B or 1F 9E), bzip2 (magic number 42 5A), LZMA
-  (magic number 5D 00), and XZ (magic number FD 37).  The uncompressed
-  payload is currently always ELF (magic number 7F 45 4C 46).
-  
+  (magic number 5D 00), XZ (magic number FD 37), and LZ4 (magic number
+  02 21).  The uncompressed payload is currently always ELF (magic
+  number 7F 45 4C 46).
+
 Field name:	payload_length
 Type:		read
 Offset/size:	0x24c/4

MAINTAINERS

@@ -9268,6 +9268,13 @@ F:	Documentation/networking/z8530drv.txt
 F:	drivers/net/hamradio/*scc.c
 F:	drivers/net/hamradio/z8530.h
 
+ZBUD COMPRESSED PAGE ALLOCATOR
+M:	Seth Jennings <[email protected]>
+L:	[email protected]
+S:	Maintained
+F:	mm/zbud.c
+F:	include/linux/zbud.h
+
 ZD1211RW WIRELESS DRIVER
 M:	Daniel Drake <[email protected]>
 M:	Ulrich Kunitz <[email protected]>
@@ -9290,6 +9297,12 @@ M:	"Maciej W. Rozycki" <[email protected]>
 S:	Maintained
 F:	drivers/tty/serial/zs.*
 
+ZSWAP COMPRESSED SWAP CACHING
+M:	Seth Jennings <[email protected]>
+L:	[email protected]
+S:	Maintained
+F:	mm/zswap.c
+
 THE REST
 M:	Linus Torvalds <[email protected]>
 L:	[email protected]

arch/arc/mm/fault.c

@@ -207,8 +207,10 @@ void do_page_fault(struct pt_regs *regs, unsigned long address)
 	}
 	up_read(&mm->mmap_sem);
 
-	if (user_mode(regs))
-		do_group_exit(SIGKILL);	/* This will never return */
+	if (user_mode(regs)) {
+		pagefault_out_of_memory();
+		return;
+	}
 
 	goto no_context;
 

arch/arm/Kconfig

@@ -41,6 +41,7 @@ config ARM
 	select HAVE_IDE if PCI || ISA || PCMCIA
 	select HAVE_IRQ_TIME_ACCOUNTING
 	select HAVE_KERNEL_GZIP
+	select HAVE_KERNEL_LZ4
 	select HAVE_KERNEL_LZMA
 	select HAVE_KERNEL_LZO
 	select HAVE_KERNEL_XZ

arch/arm/boot/compressed/.gitignore

@@ -6,6 +6,7 @@ piggy.gzip
 piggy.lzo
 piggy.lzma
 piggy.xzkern
+piggy.lz4
 vmlinux
 vmlinux.lds
 

arch/arm/boot/compressed/Makefile

@@ -91,6 +91,7 @@ suffix_$(CONFIG_KERNEL_GZIP) = gzip
 suffix_$(CONFIG_KERNEL_LZO)  = lzo
 suffix_$(CONFIG_KERNEL_LZMA) = lzma
 suffix_$(CONFIG_KERNEL_XZ)   = xzkern
+suffix_$(CONFIG_KERNEL_LZ4)  = lz4
 
 # Borrowed libfdt files for the ATAG compatibility mode
 
@@ -115,7 +116,7 @@ targets       := vmlinux vmlinux.lds \
 		 font.o font.c head.o misc.o $(OBJS)
 
 # Make sure files are removed during clean
-extra-y       += piggy.gzip piggy.lzo piggy.lzma piggy.xzkern \
+extra-y       += piggy.gzip piggy.lzo piggy.lzma piggy.xzkern piggy.lz4 \
 		 lib1funcs.S ashldi3.S $(libfdt) $(libfdt_hdrs) \
 		 hyp-stub.S
 

arch/arm/boot/compressed/decompress.c

@@ -51,6 +51,10 @@ extern char * strstr(const char * s1, const char *s2);
 #include "../../../../lib/decompress_unxz.c"
 #endif
 
+#ifdef CONFIG_KERNEL_LZ4
+#include "../../../../lib/decompress_unlz4.c"
+#endif
+
 int do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x))
 {
 	return decompress(input, len, NULL, NULL, output, NULL, error);

arch/arm/boot/compressed/piggy.lz4.S

@@ -0,0 +1,6 @@
+	.section .piggydata,#alloc
+	.globl	input_data
+input_data:
+	.incbin	"arch/arm/boot/compressed/piggy.lz4"
+	.globl	input_data_end
+input_data_end:

arch/arm/include/asm/hardware/iop3xx.h

@@ -223,11 +223,12 @@ extern int iop3xx_get_init_atu(void);
 #ifndef __ASSEMBLY__
 
 #include <linux/types.h>
+#include <linux/reboot.h>
 
 void iop3xx_map_io(void);
 void iop_init_cp6_handler(void);
 void iop_init_time(unsigned long tickrate);
-void iop3xx_restart(char, const char *);
+void iop3xx_restart(enum reboot_mode, const char *);
 
 static inline u32 read_tmr0(void)
 {

arch/arm/include/asm/mach/arch.h

@@ -11,6 +11,7 @@
 #include <linux/types.h>
 
 #ifndef __ASSEMBLY__
+#include <linux/reboot.h>
 
 struct tag;
 struct meminfo;
@@ -43,7 +44,7 @@ struct machine_desc {
 	unsigned char		reserve_lp0 :1;	/* never has lp0	*/
 	unsigned char		reserve_lp1 :1;	/* never has lp1	*/
 	unsigned char		reserve_lp2 :1;	/* never has lp2	*/
-	char			restart_mode;	/* default restart mode	*/
+	enum reboot_mode	reboot_mode;	/* default restart mode	*/
 	struct smp_operations	*smp;		/* SMP operations	*/
 	bool			(*smp_init)(void);
 	void			(*fixup)(struct tag *, char **,
@@ -58,7 +59,7 @@ struct machine_desc {
 #ifdef CONFIG_MULTI_IRQ_HANDLER
 	void			(*handle_irq)(struct pt_regs *);
 #endif
-	void			(*restart)(char, const char *);
+	void			(*restart)(enum reboot_mode, const char *);
 };
 
 /*

arch/arm/include/asm/system_misc.h

@@ -6,11 +6,12 @@
 #include <linux/compiler.h>
 #include <linux/linkage.h>
 #include <linux/irqflags.h>
+#include <linux/reboot.h>
 
 extern void cpu_init(void);
 
 void soft_restart(unsigned long);
-extern void (*arm_pm_restart)(char str, const char *cmd);
+extern void (*arm_pm_restart)(enum reboot_mode reboot_mode, const char *cmd);
 extern void (*arm_pm_idle)(void);
 
 #define UDBG_UNDEFINED	(1 << 0)

arch/arm/kernel/process.c

@@ -32,6 +32,7 @@
 #include <linux/hw_breakpoint.h>
 #include <linux/cpuidle.h>
 #include <linux/leds.h>
+#include <linux/reboot.h>
 
 #include <asm/cacheflush.h>
 #include <asm/idmap.h>
@@ -113,7 +114,7 @@ void soft_restart(unsigned long addr)
 	BUG();
 }
 
-static void null_restart(char mode, const char *cmd)
+static void null_restart(enum reboot_mode reboot_mode, const char *cmd)
 {
 }
 
@@ -123,7 +124,7 @@ static void null_restart(char mode, const char *cmd)
 void (*pm_power_off)(void);
 EXPORT_SYMBOL(pm_power_off);
 
-void (*arm_pm_restart)(char str, const char *cmd) = null_restart;
+void (*arm_pm_restart)(enum reboot_mode reboot_mode, const char *cmd) = null_restart;
 EXPORT_SYMBOL_GPL(arm_pm_restart);
 
 /*
@@ -175,16 +176,6 @@ void arch_cpu_idle(void)
 		default_idle();
 }
 
-static char reboot_mode = 'h';
-
-int __init reboot_setup(char *str)
-{
-	reboot_mode = str[0];
-	return 1;
-}
-
-__setup("reboot=", reboot_setup);
-
 /*
  * Called by kexec, immediately prior to machine_kexec().
  *

arch/arm/kernel/ptrace.c

@@ -886,20 +886,12 @@ long arch_ptrace(struct task_struct *child, long request,
 
 #ifdef CONFIG_HAVE_HW_BREAKPOINT
 		case PTRACE_GETHBPREGS:
-			if (ptrace_get_breakpoints(child) < 0)
-				return -ESRCH;
-
 			ret = ptrace_gethbpregs(child, addr,
 						(unsigned long __user *)data);
-			ptrace_put_breakpoints(child);
 			break;
 		case PTRACE_SETHBPREGS:
-			if (ptrace_get_breakpoints(child) < 0)
-				return -ESRCH;
-
 			ret = ptrace_sethbpregs(child, addr,
 						(unsigned long __user *)data);
-			ptrace_put_breakpoints(child);
 			break;
 #endif
 

arch/arm/kernel/setup.c

@@ -74,7 +74,7 @@ __setup("fpe=", fpe_setup);
 
 extern void paging_init(struct machine_desc *desc);
 extern void sanity_check_meminfo(void);
-extern void reboot_setup(char *str);
+extern enum reboot_mode reboot_mode;
 extern void setup_dma_zone(struct machine_desc *desc);
 
 unsigned int processor_id;
@@ -861,8 +861,8 @@ void __init setup_arch(char **cmdline_p)
 
 	setup_dma_zone(mdesc);
 
-	if (mdesc->restart_mode)
-		reboot_setup(&mdesc->restart_mode);
+	if (mdesc->reboot_mode != REBOOT_HARD)
+		reboot_mode = mdesc->reboot_mode;
 
 	init_mm.start_code = (unsigned long) _text;
 	init_mm.end_code   = (unsigned long) _etext;

arch/arm/mach-at91/at91rm9200.c

@@ -11,6 +11,7 @@
  */
 
 #include <linux/module.h>
+#include <linux/reboot.h>
 
 #include <asm/irq.h>
 #include <asm/mach/arch.h>
@@ -304,7 +305,7 @@ static void at91rm9200_idle(void)
 	at91_pmc_write(AT91_PMC_SCDR, AT91_PMC_PCK);
 }
 
-static void at91rm9200_restart(char mode, const char *cmd)
+static void at91rm9200_restart(enum reboot_mode reboot_mode, const char *cmd)
 {
 	/*
 	 * Perform a hardware reset with the use of the Watchdog timer.

arch/arm/mach-at91/generic.h

@@ -10,6 +10,7 @@
 
 #include <linux/clkdev.h>
 #include <linux/of.h>
+#include <linux/reboot.h>
 
  /* Map io */
 extern void __init at91_map_io(void);
@@ -60,8 +61,8 @@ extern void at91sam9_idle(void);
 
 /* reset */
 extern void at91_ioremap_rstc(u32 base_addr);
-extern void at91sam9_alt_restart(char, const char *);
-extern void at91sam9g45_restart(char, const char *);
+extern void at91sam9_alt_restart(enum reboot_mode, const char *);
+extern void at91sam9g45_restart(enum reboot_mode, const char *);
 
 /* shutdown */
 extern void at91_ioremap_shdwc(u32 base_addr);

arch/arm/mach-bcm2835/bcm2835.c

@@ -53,7 +53,7 @@ static void bcm2835_setup_restart(void)
 	WARN(!wdt_regs, "failed to remap watchdog regs");
 }
 
-static void bcm2835_restart(char mode, const char *cmd)
+static void bcm2835_restart(enum reboot_mode mode, const char *cmd)
 {
 	u32 val;
 
@@ -91,7 +91,7 @@ static void bcm2835_power_off(void)
 	writel_relaxed(val, wdt_regs + PM_RSTS);
 
 	/* Continue with normal reset mechanism */
-	bcm2835_restart(0, "");
+	bcm2835_restart(REBOOT_HARD, "");
 }
 
 static struct map_desc io_map __initdata = {

arch/arm/mach-clps711x/common.c

@@ -384,7 +384,7 @@ void __init clps711x_timer_init(void)
 	setup_irq(IRQ_TC2OI, &clps711x_timer_irq);
 }
 
-void clps711x_restart(char mode, const char *cmd)
+void clps711x_restart(enum reboot_mode mode, const char *cmd)
 {
 	soft_restart(0);
 }

arch/arm/mach-clps711x/common.h

@@ -4,6 +4,8 @@
  * Common bits.
  */
 
+#include <linux/reboot.h>
+
 #define CLPS711X_NR_IRQS	(33)
 #define CLPS711X_NR_GPIO	(4 * 8 + 3)
 #define CLPS711X_GPIO(prt, bit)	((prt) * 8 + (bit))
@@ -12,5 +14,5 @@ extern void clps711x_map_io(void);
 extern void clps711x_init_irq(void);
 extern void clps711x_timer_init(void);
 extern void clps711x_handle_irq(struct pt_regs *regs);
-extern void clps711x_restart(char mode, const char *cmd);
+extern void clps711x_restart(enum reboot_mode mode, const char *cmd);
 extern void clps711x_init_early(void);

arch/arm/mach-cns3xxx/core.h

@@ -11,6 +11,8 @@
 #ifndef __CNS3XXX_CORE_H
 #define __CNS3XXX_CORE_H
 
+#include <linux/reboot.h>
+
 extern void cns3xxx_timer_init(void);
 
 #ifdef CONFIG_CACHE_L2X0
@@ -22,6 +24,6 @@ static inline void cns3xxx_l2x0_init(void) {}
 void __init cns3xxx_map_io(void);
 void __init cns3xxx_init_irq(void);
 void cns3xxx_power_off(void);
-void cns3xxx_restart(char, const char *);
+void cns3xxx_restart(enum reboot_mode, const char *);
 
 #endif /* __CNS3XXX_CORE_H */

arch/arm/mach-cns3xxx/pm.c

@@ -89,7 +89,7 @@ void cns3xxx_pwr_soft_rst(unsigned int block)
 }
 EXPORT_SYMBOL(cns3xxx_pwr_soft_rst);
 
-void cns3xxx_restart(char mode, const char *cmd)
+void cns3xxx_restart(enum reboot_mode mode, const char *cmd)
 {
 	/*
 	 * To reset, we hit the on-board reset register