33 files changed, 148 insertions, 472 deletions

diff --git a/arch/Kconfig b/arch/Kconfig
index 6093c0be58b0..b0fabfa864ff 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -27,6 +27,25 @@ config KPROBES
           for kernel debugging, non-intrusive instrumentation and testing.
           If in doubt, say "N".
 
+config HAVE_EFFICIENT_UNALIGNED_ACCESS
+        def_bool n
+        help
+          Some architectures are unable to perform unaligned accesses
+          without the use of get_unaligned/put_unaligned. Others are
+          unable to perform such accesses efficiently (e.g. trap on
+          unaligned access and require fixing it up in the exception
+          handler.)
+
+          This symbol should be selected by an architecture if it can
+          perform unaligned accesses efficiently to allow different
+          code paths to be selected for these cases. Some network
+          drivers, for example, could opt to not fix up alignment
+          problems with received packets if doing so would not help
+          much.
+
+          See Documentation/unaligned-memory-access.txt for more
+          information on the topic of unaligned memory accesses.
+
 config KRETPROBES
         def_bool y
         depends on KPROBES && HAVE_KRETPROBES
diff --git a/arch/alpha/boot/misc.c b/arch/alpha/boot/misc.c
index c00646b25f6e..3047a1b3a517 100644
--- a/arch/alpha/boot/misc.c
+++ b/arch/alpha/boot/misc.c
@@ -78,8 +78,6 @@ static unsigned outcnt;		/* bytes in output buffer */
 static int  fill_inbuf(void);
 static void flush_window(void);
 static void error(char *m);
-static void gzip_mark(void **);
-static void gzip_release(void **);
 
 static char *input_data;
 static int  input_data_size;
@@ -88,51 +86,18 @@ static uch *output_data;
 static ulg output_ptr;
 static ulg bytes_out;
 
-static void *malloc(int size);
-static void free(void *where);
 static void error(char *m);
 static void gzip_mark(void **);
 static void gzip_release(void **);
 
 extern int end;
 static ulg free_mem_ptr;
-static ulg free_mem_ptr_end;
+static ulg free_mem_end_ptr;
 
 #define HEAP_SIZE 0x3000
 
 #include "../../../lib/inflate.c"
 
-static void *malloc(int size)
-{
-        void *p;
-
-        if (size <0) error("Malloc error");
-        if (free_mem_ptr <= 0) error("Memory error");
-
-        free_mem_ptr = (free_mem_ptr + 3) & ~3; /* Align */
-
-        p = (void *)free_mem_ptr;
-        free_mem_ptr += size;
-
-        if (free_mem_ptr >= free_mem_ptr_end)
-                error("Out of memory");
-        return p;
-}
-
-static void free(void *where)
-{ /* gzip_mark & gzip_release do the free */
-}
-
-static void gzip_mark(void **ptr)
-{
-        *ptr = (void *) free_mem_ptr;
-}
-
-static void gzip_release(void **ptr)
-{
-        free_mem_ptr = (long) *ptr;
-}
-
 /* ===========================================================================
  * Fill the input buffer. This is called only when the buffer is empty
  * and at least one byte is really needed.
@@ -193,7 +158,7 @@ decompress_kernel(void *output_start,
 
         /* FIXME FIXME FIXME */
         free_mem_ptr            = (ulg)output_start + ksize;
-        free_mem_ptr_end        = (ulg)output_start + ksize + 0x200000;
+        free_mem_end_ptr        = (ulg)output_start + ksize + 0x200000;
         /* FIXME FIXME FIXME */
 
         /* put in temp area to reduce initial footprint */
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 6fb4f03369f2..dabb015aa40b 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -268,7 +268,7 @@ config ARCH_EP93XX
         select GENERIC_GPIO
         select HAVE_CLK
         select HAVE_CLK
-        select HAVE_GPIO_LIB
+        select ARCH_REQUIRE_GPIOLIB
         help
           This enables support for the Cirrus EP93xx series of CPUs.
 
@@ -447,7 +447,7 @@ config ARCH_PXA
         select ARCH_MTD_XIP
         select GENERIC_GPIO
         select HAVE_CLK
-        select HAVE_GPIO_LIB
+        select ARCH_REQUIRE_GPIOLIB
         select GENERIC_TIME
         select GENERIC_CLOCKEVENTS
         select TICK_ONESHOT
@@ -479,7 +479,7 @@ config ARCH_SA1100
         select GENERIC_CLOCKEVENTS
         select HAVE_CLK
         select TICK_ONESHOT
-        select HAVE_GPIO_LIB
+        select ARCH_REQUIRE_GPIOLIB
         help
           Support for StrongARM 11x0 based boards.
 
@@ -522,7 +522,7 @@ config ARCH_OMAP
         bool "TI OMAP"
         select GENERIC_GPIO
         select HAVE_CLK
-        select HAVE_GPIO_LIB
+        select ARCH_REQUIRE_GPIOLIB
         select GENERIC_TIME
         select GENERIC_CLOCKEVENTS
         help
diff --git a/arch/arm/boot/compressed/misc.c b/arch/arm/boot/compressed/misc.c
index 9b444022cb9b..7145cc7c04f0 100644
--- a/arch/arm/boot/compressed/misc.c
+++ b/arch/arm/boot/compressed/misc.c
@@ -217,8 +217,6 @@ static unsigned outcnt;		/* bytes in output buffer */
 static int  fill_inbuf(void);
 static void flush_window(void);
 static void error(char *m);
-static void gzip_mark(void **);
-static void gzip_release(void **);
 
 extern char input_data[];
 extern char input_data_end[];
@@ -227,64 +225,21 @@ static uch *output_data;
 static ulg output_ptr;
 static ulg bytes_out;
 
-static void *malloc(int size);
-static void free(void *where);
 static void error(char *m);
-static void gzip_mark(void **);
-static void gzip_release(void **);
 
 static void putstr(const char *);
 
 extern int end;
 static ulg free_mem_ptr;
-static ulg free_mem_ptr_end;
+static ulg free_mem_end_ptr;
 
-#define HEAP_SIZE 0x3000
-
-#include "../../../../lib/inflate.c"
-
-#ifndef STANDALONE_DEBUG
-static void *malloc(int size)
-{
-        void *p;
-
-        if (size <0) error("Malloc error");
-        if (free_mem_ptr <= 0) error("Memory error");
-
-        free_mem_ptr = (free_mem_ptr + 3) & ~3; /* Align */
-
-        p = (void *)free_mem_ptr;
-        free_mem_ptr += size;
-
-        if (free_mem_ptr >= free_mem_ptr_end)
-                error("Out of memory");
-        return p;
-}
-
-static void free(void *where)
-{ /* gzip_mark & gzip_release do the free */
-}
-
-static void gzip_mark(void **ptr)
-{
-        arch_decomp_wdog();
-        *ptr = (void *) free_mem_ptr;
-}
+#ifdef STANDALONE_DEBUG
+#define NO_INFLATE_MALLOC
+#endif
 
-static void gzip_release(void **ptr)
-{
-        arch_decomp_wdog();
-        free_mem_ptr = (long) *ptr;
-}
-#else
-static void gzip_mark(void **ptr)
-{
-}
+#define ARCH_HAS_DECOMP_WDOG
 
-static void gzip_release(void **ptr)
-{
-}
-#endif
+#include "../../../../lib/inflate.c"
 
 /* ===========================================================================
  * Fill the input buffer. This is called only when the buffer is empty
@@ -348,7 +303,7 @@ decompress_kernel(ulg output_start, ulg free_mem_ptr_p, ulg free_mem_ptr_end_p,
 {
         output_data             = (uch *)output_start;  /* Points to kernel start */
         free_mem_ptr            = free_mem_ptr_p;
-        free_mem_ptr_end        = free_mem_ptr_end_p;
+        free_mem_end_ptr        = free_mem_ptr_end_p;
         __machine_arch_type     = arch_id;
 
         arch_decomp_setup();
diff --git a/arch/arm/kernel/kprobes.c b/arch/arm/kernel/kprobes.c
index 5ee39e10c8d1..d28513f14d05 100644
--- a/arch/arm/kernel/kprobes.c
+++ b/arch/arm/kernel/kprobes.c
@@ -296,8 +296,7 @@ static __used __kprobes void *trampoline_handler(struct pt_regs *regs)
         unsigned long trampoline_address = (unsigned long)&kretprobe_trampoline;
 
         INIT_HLIST_HEAD(&empty_rp);
-        spin_lock_irqsave(&kretprobe_lock, flags);
-        head = kretprobe_inst_table_head(current);
+        kretprobe_hash_lock(current, &head, &flags);
 
         /*
          * It is possible to have multiple instances associated with a given
@@ -337,7 +336,7 @@ static __used __kprobes void *trampoline_handler(struct pt_regs *regs)
         }
 
         kretprobe_assert(ri, orig_ret_address, trampoline_address);
-        spin_unlock_irqrestore(&kretprobe_lock, flags);
+        kretprobe_hash_unlock(current, &flags);
 
         hlist_for_each_entry_safe(ri, node, tmp, &empty_rp, hlist) {
                 hlist_del(&ri->hlist);
@@ -347,7 +346,6 @@ static __used __kprobes void *trampoline_handler(struct pt_regs *regs)
         return (void *)orig_ret_address;
 }
 
-/* Called with kretprobe_lock held. */
 void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri,
                                       struct pt_regs *regs)
 {
diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c
index 1903a3491ee9..d8e9c2c3f0f6 100644
--- a/arch/arm/plat-omap/gpio.c
+++ b/arch/arm/plat-omap/gpio.c
@@ -1488,6 +1488,9 @@ static int __init _omap_gpio_init(void)
                 bank->chip.set = gpio_set;
                 if (bank_is_mpuio(bank)) {
                         bank->chip.label = "mpuio";
+#ifdef CONFIG_ARCH_OMAP1
+                        bank->chip.dev = &omap_mpuio_device.dev;
+#endif
                         bank->chip.base = OMAP_MPUIO(0);
                 } else {
                         bank->chip.label = "gpio";
diff --git a/arch/avr32/Kconfig b/arch/avr32/Kconfig
index df4adefedb42..7c239a916275 100644
--- a/arch/avr32/Kconfig
+++ b/arch/avr32/Kconfig
@@ -88,7 +88,7 @@ config PLATFORM_AT32AP
         select SUBARCH_AVR32B
         select MMU
         select PERFORMANCE_COUNTERS
-        select HAVE_GPIO_LIB
+        select ARCH_REQUIRE_GPIOLIB
         select GENERIC_ALLOCATOR
 
 #
diff --git a/arch/avr32/mach-at32ap/pio.c b/arch/avr32/mach-at32ap/pio.c
index 60da03ba7117..296294f8ed81 100644
--- a/arch/avr32/mach-at32ap/pio.c
+++ b/arch/avr32/mach-at32ap/pio.c
@@ -360,6 +360,8 @@ static int __init pio_probe(struct platform_device *pdev)
         pio->chip.label = pio->name;
         pio->chip.base = pdev->id * 32;
         pio->chip.ngpio = 32;
+        pio->chip.dev = &pdev->dev;
+        pio->chip.owner = THIS_MODULE;
 
         pio->chip.direction_input = direction_input;
         pio->chip.get = gpio_get;
diff --git a/arch/cris/arch-v10/boot/compressed/misc.c b/arch/cris/arch-v10/boot/compressed/misc.c
index 18e13bce1400..d933c89889db 100644
--- a/arch/cris/arch-v10/boot/compressed/misc.c
+++ b/arch/cris/arch-v10/boot/compressed/misc.c
@@ -102,50 +102,16 @@ extern char *input_data;  /* lives in head.S */
 static long bytes_out = 0;
 static uch *output_data;
 static unsigned long output_ptr = 0;
-
-static void *malloc(int size);
-static void free(void *where);
-static void gzip_mark(void **);
-static void gzip_release(void **);
-
 static void puts(const char *);
 
 /* the "heap" is put directly after the BSS ends, at end */
 
 extern int _end;
 static long free_mem_ptr = (long)&_end;
+static long free_mem_end_ptr;
 
 #include "../../../../../lib/inflate.c"
 
-static void *malloc(int size)
-{
-        void *p;
-
-        if (size < 0)
-                error("Malloc error");
-
-        free_mem_ptr = (free_mem_ptr + 3) & ~3; /* Align */
-
-        p = (void *)free_mem_ptr;
-        free_mem_ptr += size;
-
-        return p;
-}
-
-static void free(void *where)
-{       /* Don't care */
-}
-
-static void gzip_mark(void **ptr)
-{
-        *ptr = (void *) free_mem_ptr;
-}
-
-static void gzip_release(void **ptr)
-{
-        free_mem_ptr = (long) *ptr;
-}
-
 /* decompressor info and error messages to serial console */
 
 static void
diff --git a/arch/cris/arch-v32/boot/compressed/misc.c b/arch/cris/arch-v32/boot/compressed/misc.c
index 55b2695c5d70..3595e16e82bc 100644
--- a/arch/cris/arch-v32/boot/compressed/misc.c
+++ b/arch/cris/arch-v32/boot/compressed/misc.c
@@ -89,20 +89,14 @@ static unsigned outcnt = 0;  /* bytes in output buffer */
 
 static void flush_window(void);
 static void error(char *m);
-static void gzip_mark(void **);
-static void gzip_release(void **);
 
 extern char *input_data;  /* lives in head.S */
 
-static long bytes_out = 0;
+static long bytes_out;
 static uch *output_data;
-static unsigned long output_ptr = 0;
+static unsigned long output_ptr;
 
-static void *malloc(int size);
-static void free(void *where);
 static void error(char *m);
-static void gzip_mark(void **);
-static void gzip_release(void **);
 
 static void puts(const char *);
 
@@ -110,37 +104,10 @@ static void puts(const char *);
 
 extern int _end;
 static long free_mem_ptr = (long)&_end;
+static long free_mem_end_ptr;
 
 #include "../../../../../lib/inflate.c"
 
-static void *malloc(int size)
-{
-        void *p;
-
-        if (size <0) error("Malloc error");
-
-        free_mem_ptr = (free_mem_ptr + 3) & ~3; /* Align */
-
-        p = (void *)free_mem_ptr;
-        free_mem_ptr += size;
-
-        return p;
-}
-
-static void free(void *where)
-{       /* Don't care */
-}
-
-static void gzip_mark(void **ptr)
-{
-        *ptr = (void *) free_mem_ptr;
-}
-
-static void gzip_release(void **ptr)
-{
-        free_mem_ptr = (long) *ptr;
-}
-
 /* decompressor info and error messages to serial console */
 
 static inline void
diff --git a/arch/h8300/Kconfig b/arch/h8300/Kconfig
index 085dc6ec152b..396ab059efa3 100644
--- a/arch/h8300/Kconfig
+++ b/arch/h8300/Kconfig
@@ -203,20 +203,6 @@ config UNIX98_PTYS
           Read the instructions in <file:Documentation/Changes> pertaining to
           pseudo terminals. It's safe to say N.
 
-config UNIX98_PTY_COUNT
-        int "Maximum number of Unix98 PTYs in use (0-2048)"
-        depends on UNIX98_PTYS
-        default "256"
-        help
-          The maximum number of Unix98 PTYs that can be used at any one time.
-          The default is 256, and should be enough for desktop systems. Server
-          machines which support incoming telnet/rlogin/ssh connections and/or
-          serve several X terminals may want to increase this: every incoming
-          connection and every xterm uses up one PTY.
-
-          When not in use, each additional set of 256 PTYs occupy
-          approximately 8 KB of kernel memory on 32-bit architectures.
-
 source "drivers/char/pcmcia/Kconfig"
 
 source "drivers/serial/Kconfig"
diff --git a/arch/h8300/boot/compressed/misc.c b/arch/h8300/boot/compressed/misc.c
index 845074588af0..51ab6cbd030f 100644
--- a/arch/h8300/boot/compressed/misc.c
+++ b/arch/h8300/boot/compressed/misc.c
@@ -67,8 +67,6 @@ static unsigned outcnt = 0;  /* bytes in output buffer */
 static int  fill_inbuf(void);
 static void flush_window(void);
 static void error(char *m);
-static void gzip_mark(void **);
-static void gzip_release(void **);
 
 extern char input_data[];
 extern int input_len;
@@ -77,11 +75,7 @@ static long bytes_out = 0;
 static uch *output_data;
 static unsigned long output_ptr = 0;
 
-static void *malloc(int size);
-static void free(void *where);
 static void error(char *m);
-static void gzip_mark(void **);
-static void gzip_release(void **);
 
 int puts(const char *);
 
@@ -98,38 +92,6 @@ static unsigned long free_mem_end_ptr;
 #define TDR *((volatile unsigned char *)0xffff8b)
 #define SSR *((volatile unsigned char *)0xffff8c)
 
-static void *malloc(int size)
-{
-        void *p;
-
-        if (size <0) error("Malloc error");
-        if (free_mem_ptr == 0) error("Memory error");
-
-        free_mem_ptr = (free_mem_ptr + 3) & ~3; /* Align */
-
-        p = (void *)free_mem_ptr;
-        free_mem_ptr += size;
-
-        if (free_mem_ptr >= free_mem_end_ptr)
-                error("Out of memory");
-
-        return p;
-}
-
-static void free(void *where)
-{       /* Don't care */
-}
-
-static void gzip_mark(void **ptr)
-{
-        *ptr = (void *) free_mem_ptr;
-}
-
-static void gzip_release(void **ptr)
-{
-        free_mem_ptr = (long) *ptr;
-}
-
 int puts(const char *s)
 {
         return 0;
diff --git a/arch/ia64/kernel/kprobes.c b/arch/ia64/kernel/kprobes.c
index 233434f4f88f..f07688da947c 100644
--- a/arch/ia64/kernel/kprobes.c
+++ b/arch/ia64/kernel/kprobes.c
@@ -429,8 +429,7 @@ int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
                 ((struct fnptr *)kretprobe_trampoline)->ip;
 
         INIT_HLIST_HEAD(&empty_rp);
-        spin_lock_irqsave(&kretprobe_lock, flags);
-        head = kretprobe_inst_table_head(current);
+        kretprobe_hash_lock(current, &head, &flags);
 
         /*
          * It is possible to have multiple instances associated with a given
@@ -485,7 +484,7 @@ int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
         kretprobe_assert(ri, orig_ret_address, trampoline_address);
 
         reset_current_kprobe();
-        spin_unlock_irqrestore(&kretprobe_lock, flags);
+        kretprobe_hash_unlock(current, &flags);
         preempt_enable_no_resched();
 
         hlist_for_each_entry_safe(ri, node, tmp, &empty_rp, hlist) {
@@ -500,7 +499,6 @@ int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
         return 1;
 }
 
-/* Called with kretprobe_lock held */
 void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri,
                                       struct pt_regs *regs)
 {
diff --git a/arch/m32r/boot/compressed/misc.c b/arch/m32r/boot/compressed/misc.c
index 600d40e33495..d394292498c0 100644
--- a/arch/m32r/boot/compressed/misc.c
+++ b/arch/m32r/boot/compressed/misc.c
@@ -70,8 +70,6 @@ static unsigned outcnt = 0;  /* bytes in output buffer */
 static int  fill_inbuf(void);
 static void flush_window(void);
 static void error(char *m);
-static void gzip_mark(void **);
-static void gzip_release(void **);
 
 static unsigned char *input_data;
 static int input_len;
@@ -82,9 +80,6 @@ static unsigned long output_ptr = 0;
 
 #include "m32r_sio.c"
 
-static void *malloc(int size);
-static void free(void *where);
-
 static unsigned long free_mem_ptr;
 static unsigned long free_mem_end_ptr;
 
@@ -92,38 +87,6 @@ static unsigned long free_mem_end_ptr;
 
 #include "../../../../lib/inflate.c"
 
-static void *malloc(int size)
-{
-        void *p;
-
-        if (size <0) error("Malloc error");
-        if (free_mem_ptr == 0) error("Memory error");
-
-        free_mem_ptr = (free_mem_ptr + 3) & ~3; /* Align */
-
-        p = (void *)free_mem_ptr;
-        free_mem_ptr += size;
-
-        if (free_mem_ptr >= free_mem_end_ptr)
-                error("Out of memory");
-
-        return p;
-}
-
-static void free(void *where)
-{       /* Don't care */
-}
-
-static void gzip_mark(void **ptr)
-{
-        *ptr = (void *) free_mem_ptr;
-}
-
-static void gzip_release(void **ptr)
-{
-        free_mem_ptr = (long) *ptr;
-}
-
 void* memset(void* s, int c, size_t n)
 {
         int i;
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index b9c754f4070c..b4c4eaa5dd26 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -713,7 +713,7 @@ config CSRC_SB1250
 
 config GPIO_TXX9
         select GENERIC_GPIO
-        select HAVE_GPIO_LIB
+        select ARCH_REQUIRE_GPIOLIB
         bool
 
 config CFE
diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c
index c266211ed653..2fefb14414b7 100644
--- a/arch/mips/kernel/linux32.c
+++ b/arch/mips/kernel/linux32.c
@@ -11,7 +11,6 @@
 #include <linux/file.h>
 #include <linux/smp_lock.h>
 #include <linux/highuid.h>
-#include <linux/dirent.h>
 #include <linux/resource.h>
 #include <linux/highmem.h>
 #include <linux/time.h>
diff --git a/arch/mn10300/boot/compressed/misc.c b/arch/mn10300/boot/compressed/misc.c
index ded207efc97a..f673383518e4 100644
--- a/arch/mn10300/boot/compressed/misc.c
+++ b/arch/mn10300/boot/compressed/misc.c
@@ -153,26 +153,9 @@ static uch *output_data;
 static unsigned long output_ptr;
 
 
-static void *malloc(int size);
-
-static inline void free(void *where)
-{       /* Don't care */
-}
-
 static unsigned long free_mem_ptr = (unsigned long) &end;
 static unsigned long free_mem_end_ptr = (unsigned long) &end + 0x90000;
 
-static inline void gzip_mark(void **ptr)
-{
-        kputs(".");
-        *ptr = (void *) free_mem_ptr;
-}
-
-static inline void gzip_release(void **ptr)
-{
-        free_mem_ptr = (unsigned long) *ptr;
-}
-
 #define INPLACE_MOVE_ROUTINE    0x1000
 #define LOW_BUFFER_START        0x2000
 #define LOW_BUFFER_END          0x90000
@@ -186,26 +169,6 @@ static int lines, cols;
 
 #include "../../../../lib/inflate.c"
 
-static void *malloc(int size)
-{
-        void *p;
-
-        if (size < 0)
-                error("Malloc error\n");
-        if (!free_mem_ptr)
-                error("Memory error\n");
-
-        free_mem_ptr = (free_mem_ptr + 3) & ~3; /* Align */
-
-        p = (void *) free_mem_ptr;
-        free_mem_ptr += size;
-
-        if (free_mem_ptr >= free_mem_end_ptr)
-                error("\nOut of memory\n");
-
-        return p;
-}
-
 static inline void scroll(void)
 {
         int i;
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index a487671c282f..fe88418167c5 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -110,8 +110,10 @@ config PPC
         default y
         select HAVE_DYNAMIC_FTRACE
         select HAVE_FTRACE
+        select ARCH_WANT_OPTIONAL_GPIOLIB
         select HAVE_IDE
         select HAVE_IOREMAP_PROT
+        select HAVE_EFFICIENT_UNALIGNED_ACCESS
         select HAVE_KPROBES
         select HAVE_ARCH_KGDB
         select HAVE_KRETPROBES
diff --git a/arch/powerpc/kernel/kprobes.c b/arch/powerpc/kernel/kprobes.c
index 4ba2af125450..de79915452c8 100644
--- a/arch/powerpc/kernel/kprobes.c
+++ b/arch/powerpc/kernel/kprobes.c
@@ -144,7 +144,6 @@ static void __kprobes set_current_kprobe(struct kprobe *p, struct pt_regs *regs,
         kcb->kprobe_saved_msr = regs->msr;
 }
 
-/* Called with kretprobe_lock held */
 void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri,
                                       struct pt_regs *regs)
 {
@@ -312,8 +311,7 @@ static int __kprobes trampoline_probe_handler(struct kprobe *p,
         unsigned long trampoline_address =(unsigned long)&kretprobe_trampoline;
 
         INIT_HLIST_HEAD(&empty_rp);
-        spin_lock_irqsave(&kretprobe_lock, flags);
-        head = kretprobe_inst_table_head(current);
+        kretprobe_hash_lock(current, &head, &flags);
 
         /*
          * It is possible to have multiple instances associated with a given
@@ -352,7 +350,7 @@ static int __kprobes trampoline_probe_handler(struct kprobe *p,
         regs->nip = orig_ret_address;
 
         reset_current_kprobe();
-        spin_unlock_irqrestore(&kretprobe_lock, flags);
+        kretprobe_hash_unlock(current, &flags);
         preempt_enable_no_resched();
 
         hlist_for_each_entry_safe(ri, node, tmp, &empty_rp, hlist) {
diff --git a/arch/powerpc/platforms/52xx/Kconfig b/arch/powerpc/platforms/52xx/Kconfig
index 9a51675beb80..696a5ee4962d 100644
--- a/arch/powerpc/platforms/52xx/Kconfig
+++ b/arch/powerpc/platforms/52xx/Kconfig
@@ -47,7 +47,7 @@ config PPC_MPC5200_BUGFIX
 config PPC_MPC5200_GPIO
         bool "MPC5200 GPIO support"
         depends on PPC_MPC52xx
+        select ARCH_REQUIRE_GPIOLIB
         select GENERIC_GPIO
-        select HAVE_GPIO_LIB
         help
           Enable gpiolib support for mpc5200 based boards
diff --git a/arch/powerpc/sysdev/qe_lib/Kconfig b/arch/powerpc/sysdev/qe_lib/Kconfig
index 4bb18f57901e..1ce546462be5 100644
--- a/arch/powerpc/sysdev/qe_lib/Kconfig
+++ b/arch/powerpc/sysdev/qe_lib/Kconfig
@@ -29,7 +29,7 @@ config QE_GPIO
         bool "QE GPIO support"
         depends on QUICC_ENGINE
         select GENERIC_GPIO
-        select HAVE_GPIO_LIB
+        select ARCH_REQUIRE_GPIOLIB
         help
           Say Y here if you're going to use hardware that connects to the
           QE GPIOs.
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index eb530b4128ba..2ed88122be93 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -565,6 +565,7 @@ bool "s390 guest support (EXPERIMENTAL)"
         depends on 64BIT && EXPERIMENTAL
         select VIRTIO
         select VIRTIO_RING
+        select VIRTIO_CONSOLE
         help
           Select this option if you want to run the kernel under s390 linux
 endmenu
diff --git a/arch/s390/kernel/kprobes.c b/arch/s390/kernel/kprobes.c
index 288ad490a6dd..4f82e5b5f879 100644
--- a/arch/s390/kernel/kprobes.c
+++ b/arch/s390/kernel/kprobes.c
@@ -270,7 +270,6 @@ static void __kprobes set_current_kprobe(struct kprobe *p, struct pt_regs *regs,
         __ctl_store(kcb->kprobe_saved_ctl, 9, 11);
 }
 
-/* Called with kretprobe_lock held */
 void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri,
                                         struct pt_regs *regs)
 {
@@ -377,8 +376,7 @@ static int __kprobes trampoline_probe_handler(struct kprobe *p,
         unsigned long trampoline_address = (unsigned long)&kretprobe_trampoline;
 
         INIT_HLIST_HEAD(&empty_rp);
-        spin_lock_irqsave(&kretprobe_lock, flags);
-        head = kretprobe_inst_table_head(current);
+        kretprobe_hash_lock(current, &head, &flags);
 
         /*
          * It is possible to have multiple instances associated with a given
@@ -417,7 +415,7 @@ static int __kprobes trampoline_probe_handler(struct kprobe *p,
         regs->psw.addr = orig_ret_address | PSW_ADDR_AMODE;
 
         reset_current_kprobe();
-        spin_unlock_irqrestore(&kretprobe_lock, flags);
+        kretprobe_hash_unlock(current, &flags);
         preempt_enable_no_resched();
 
         hlist_for_each_entry_safe(ri, node, tmp, &empty_rp, hlist) {
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index b358e18273b0..62122bad1e33 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -54,6 +54,7 @@
 #include <asm/sections.h>
 #include <asm/ebcdic.h>
 #include <asm/compat.h>
+#include <asm/kvm_virtio.h>
 
 long psw_kernel_bits    = (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_PRIMARY |
                            PSW_MASK_MCHECK | PSW_DEFAULT_KEY);
@@ -766,7 +767,8 @@ setup_arch(char **cmdline_p)
                 printk("We are running under VM (64 bit mode)\n");
         else if (MACHINE_IS_KVM) {
                 printk("We are running under KVM (64 bit mode)\n");
-                add_preferred_console("ttyS", 1, NULL);
+                add_preferred_console("hvc", 0, NULL);
+                s390_virtio_console_init();
         } else
                 printk("We are running native (64 bit mode)\n");
 #endif /* CONFIG_64BIT */
diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c
index 212d618b0095..632b13e10053 100644
--- a/arch/s390/kernel/topology.c
+++ b/arch/s390/kernel/topology.c
@@ -9,7 +9,6 @@
 #include <linux/device.h>
 #include <linux/bootmem.h>
 #include <linux/sched.h>
-#include <linux/kthread.h>
 #include <linux/workqueue.h>
 #include <linux/cpu.h>
 #include <linux/smp.h>
@@ -230,20 +229,9 @@ void arch_update_cpu_topology(void)
         }
 }
 
-static int topology_kthread(void *data)
-{
-        arch_reinit_sched_domains();
-        return 0;
-}
-
 static void topology_work_fn(struct work_struct *work)
 {
-        /* We can't call arch_reinit_sched_domains() from a multi-threaded
-         * workqueue context since it may deadlock in case of cpu hotplug.
-         * So we have to create a kernel thread in order to call
-         * arch_reinit_sched_domains().
-         */
-        kthread_run(topology_kthread, NULL, "topology_update");
+        arch_reinit_sched_domains();
 }
 
 void topology_schedule_update(void)
diff --git a/arch/sh/boot/compressed/misc_32.c b/arch/sh/boot/compressed/misc_32.c
index adcea31e663e..f386997e4d9c 100644
--- a/arch/sh/boot/compressed/misc_32.c
+++ b/arch/sh/boot/compressed/misc_32.c
@@ -74,8 +74,6 @@ static unsigned outcnt = 0;  /* bytes in output buffer */
 static int  fill_inbuf(void);
 static void flush_window(void);
 static void error(char *m);
-static void gzip_mark(void **);
-static void gzip_release(void **);
 
 extern char input_data[];
 extern int input_len;
@@ -84,11 +82,7 @@ static long bytes_out = 0;
 static uch *output_data;
 static unsigned long output_ptr = 0;
 
-static void *malloc(int size);
-static void free(void *where);
 static void error(char *m);
-static void gzip_mark(void **);
-static void gzip_release(void **);
 
 int puts(const char *);
 
@@ -101,38 +95,6 @@ static unsigned long free_mem_end_ptr;
 
 #include "../../../../lib/inflate.c"
 
-static void *malloc(int size)
-{
-        void *p;
-
-        if (size <0) error("Malloc error");
-        if (free_mem_ptr == 0) error("Memory error");
-
-        free_mem_ptr = (free_mem_ptr + 3) & ~3; /* Align */
-
-        p = (void *)free_mem_ptr;
-        free_mem_ptr += size;
-
-        if (free_mem_ptr >= free_mem_end_ptr)
-                error("Out of memory");
-
-        return p;
-}
-
-static void free(void *where)
-{       /* Don't care */
-}
-
-static void gzip_mark(void **ptr)
-{
-        *ptr = (void *) free_mem_ptr;
-}
-
-static void gzip_release(void **ptr)
-{
-        free_mem_ptr = (long) *ptr;
-}
-
 #ifdef CONFIG_SH_STANDARD_BIOS
 size_t strlen(const char *s)
 {
diff --git a/arch/sh/boot/compressed/misc_64.c b/arch/sh/boot/compressed/misc_64.c
index a006ef89b9dd..2941657e18aa 100644
--- a/arch/sh/boot/compressed/misc_64.c
+++ b/arch/sh/boot/compressed/misc_64.c
@@ -72,8 +72,6 @@ static unsigned outcnt = 0;	/* bytes in output buffer */
 static int fill_inbuf(void);
 static void flush_window(void);
 static void error(char *m);
-static void gzip_mark(void **);
-static void gzip_release(void **);
 
 extern char input_data[];
 extern int input_len;
@@ -82,11 +80,7 @@ static long bytes_out = 0;
 static uch *output_data;
 static unsigned long output_ptr = 0;
 
-static void *malloc(int size);
-static void free(void *where);
 static void error(char *m);
-static void gzip_mark(void **);
-static void gzip_release(void **);
 
 static void puts(const char *);
 
@@ -99,40 +93,6 @@ static unsigned long free_mem_end_ptr;
 
 #include "../../../../lib/inflate.c"
 
-static void *malloc(int size)
-{
-        void *p;
-
-        if (size < 0)
-                error("Malloc error\n");
-        if (free_mem_ptr == 0)
-                error("Memory error\n");
-
-        free_mem_ptr = (free_mem_ptr + 3) & ~3; /* Align */
-
-        p = (void *) free_mem_ptr;
-        free_mem_ptr += size;
-
-        if (free_mem_ptr >= free_mem_end_ptr)
-                error("\nOut of memory\n");
-
-        return p;
-}
-
-static void free(void *where)
-{                               /* Don't care */
-}
-
-static void gzip_mark(void **ptr)
-{
-        *ptr = (void *) free_mem_ptr;
-}
-
-static void gzip_release(void **ptr)
-{
-        free_mem_ptr = (long) *ptr;
-}
-
 void puts(const char *s)
 {
 }
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 789724e61e83..375de7c6d082 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -298,20 +298,6 @@ config UNIX98_PTYS
           Read the instructions in <file:Documentation/Changes> pertaining to
           pseudo terminals. It's safe to say N.
 
-config UNIX98_PTY_COUNT
-        int "Maximum number of Unix98 PTYs in use (0-2048)"
-        depends on UNIX98_PTYS
-        default "256"
-        help
-          The maximum number of Unix98 PTYs that can be used at any one time.
-          The default is 256, and should be enough for desktop systems. Server
-          machines which support incoming telnet/rlogin/ssh connections and/or
-          serve several X terminals may want to increase this: every incoming
-          connection and every xterm uses up one PTY.
-
-          When not in use, each additional set of 256 PTYs occupy
-          approximately 8 KB of kernel memory on 32-bit architectures.
-
 endmenu
 
 source "fs/Kconfig"
diff --git a/arch/sparc64/kernel/kprobes.c b/arch/sparc64/kernel/kprobes.c
index f43b5d755354..201a6e547e4a 100644
--- a/arch/sparc64/kernel/kprobes.c
+++ b/arch/sparc64/kernel/kprobes.c
@@ -478,9 +478,9 @@ int __kprobes longjmp_break_handler(struct kprobe *p, struct pt_regs *regs)
         return 0;
 }
 
-/* Called with kretprobe_lock held.  The value stored in the return
- * address register is actually 2 instructions before where the
- * callee will return to.  Sequences usually look something like this
+/* The value stored in the return address register is actually 2
+ * instructions before where the callee will return to.
+ * Sequences usually look something like this
  *
  *              call    some_function   <--- return register points here
  *               nop                    <--- call delay slot
@@ -512,8 +512,7 @@ int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
         unsigned long trampoline_address =(unsigned long)&kretprobe_trampoline;
 
         INIT_HLIST_HEAD(&empty_rp);
-        spin_lock_irqsave(&kretprobe_lock, flags);
-        head = kretprobe_inst_table_head(current);
+        kretprobe_hash_lock(current, &head, &flags);
 
         /*
          * It is possible to have multiple instances associated with a given
@@ -553,7 +552,7 @@ int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
         regs->tnpc = orig_ret_address + 4;
 
         reset_current_kprobe();
-        spin_unlock_irqrestore(&kretprobe_lock, flags);
+        kretprobe_hash_unlock(current, &flags);
         preempt_enable_no_resched();
 
         hlist_for_each_entry_safe(ri, node, tmp, &empty_rp, hlist) {
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index b2ddfcf01728..e3cba0b45600 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -23,11 +23,13 @@ config X86
         select HAVE_OPROFILE
         select HAVE_IOREMAP_PROT
         select HAVE_KPROBES
+        select ARCH_WANT_OPTIONAL_GPIOLIB if !X86_RDC321X
         select HAVE_KRETPROBES
         select HAVE_DYNAMIC_FTRACE
         select HAVE_FTRACE
         select HAVE_KVM if ((X86_32 && !X86_VOYAGER && !X86_VISWS && !X86_NUMAQ) || X86_64)
         select HAVE_ARCH_KGDB if !X86_VOYAGER
+        select HAVE_EFFICIENT_UNALIGNED_ACCESS
 
 config ARCH_DEFCONFIG
         string
diff --git a/arch/x86/boot/compressed/misc.c b/arch/x86/boot/compressed/misc.c
index bc5553b496f7..9fea73706479 100644
--- a/arch/x86/boot/compressed/misc.c
+++ b/arch/x86/boot/compressed/misc.c
@@ -182,8 +182,6 @@ static unsigned		outcnt;
 static int  fill_inbuf(void);
 static void flush_window(void);
 static void error(char *m);
-static void gzip_mark(void **);
-static void gzip_release(void **);
 
 /*
  * This is set up by the setup-routine at boot-time
@@ -196,9 +194,6 @@ extern int input_len;
 
 static long bytes_out;
 
-static void *malloc(int size);
-static void free(void *where);
-
 static void *memset(void *s, int c, unsigned n);
 static void *memcpy(void *dest, const void *src, unsigned n);
 
@@ -220,40 +215,6 @@ static int lines, cols;
 
 #include "../../../../lib/inflate.c"
 
-static void *malloc(int size)
-{
-        void *p;
-
-        if (size < 0)
-                error("Malloc error");
-        if (free_mem_ptr <= 0)
-                error("Memory error");
-
-        free_mem_ptr = (free_mem_ptr + 3) & ~3; /* Align */
-
-        p = (void *)free_mem_ptr;
-        free_mem_ptr += size;
-
-        if (free_mem_ptr >= free_mem_end_ptr)
-                error("Out of memory");
-
-        return p;
-}
-
-static void free(void *where)
-{       /* Don't care */
-}
-
-static void gzip_mark(void **ptr)
-{
-        *ptr = (void *) free_mem_ptr;
-}
-
-static void gzip_release(void **ptr)
-{
-        free_mem_ptr = (memptr) *ptr;
-}
-
 static void scroll(void)
 {
         int i;
diff --git a/arch/x86/kernel/kprobes.c b/arch/x86/kernel/kprobes.c
index 43c019f85f0d..6c27679ec6aa 100644
--- a/arch/x86/kernel/kprobes.c
+++ b/arch/x86/kernel/kprobes.c
@@ -431,7 +431,6 @@ static void __kprobes prepare_singlestep(struct kprobe *p, struct pt_regs *regs)
                 regs->ip = (unsigned long)p->ainsn.insn;
 }
 
-/* Called with kretprobe_lock held */
 void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri,
                                       struct pt_regs *regs)
 {
@@ -682,8 +681,7 @@ static __used __kprobes void *trampoline_handler(struct pt_regs *regs)
         unsigned long trampoline_address = (unsigned long)&kretprobe_trampoline;
 
         INIT_HLIST_HEAD(&empty_rp);
-        spin_lock_irqsave(&kretprobe_lock, flags);
-        head = kretprobe_inst_table_head(current);
+        kretprobe_hash_lock(current, &head, &flags);
         /* fixup registers */
 #ifdef CONFIG_X86_64
         regs->cs = __KERNEL_CS;
@@ -732,7 +730,7 @@ static __used __kprobes void *trampoline_handler(struct pt_regs *regs)
 
         kretprobe_assert(ri, orig_ret_address, trampoline_address);
 
-        spin_unlock_irqrestore(&kretprobe_lock, flags);
+        kretprobe_hash_unlock(current, &flags);
 
         hlist_for_each_entry_safe(ri, node, tmp, &empty_rp, hlist) {
                 hlist_del(&ri->hlist);
diff --git a/arch/x86/kernel/pci-calgary_64.c b/arch/x86/kernel/pci-calgary_64.c
index 151f2d171f7c..19e7fc7c2c4f 100644
--- a/arch/x86/kernel/pci-calgary_64.c
+++ b/arch/x86/kernel/pci-calgary_64.c
@@ -29,6 +29,7 @@
 #include <linux/mm.h>
 #include <linux/spinlock.h>
 #include <linux/string.h>
+#include <linux/crash_dump.h>
 #include <linux/dma-mapping.h>
 #include <linux/bitops.h>
 #include <linux/pci_ids.h>
@@ -167,6 +168,8 @@ static void calgary_dump_error_regs(struct iommu_table *tbl);
 static void calioc2_handle_quirks(struct iommu_table *tbl, struct pci_dev *dev);
 static void calioc2_tce_cache_blast(struct iommu_table *tbl);
 static void calioc2_dump_error_regs(struct iommu_table *tbl);
+static void calgary_init_bitmap_from_tce_table(struct iommu_table *tbl);
+static void get_tce_space_from_tar(void);
 
 static struct cal_chipset_ops calgary_chip_ops = {
         .handle_quirks = calgary_handle_quirks,
@@ -830,7 +833,11 @@ static int __init calgary_setup_tar(struct pci_dev *dev, void __iomem *bbar)
 
         tbl = pci_iommu(dev->bus);
         tbl->it_base = (unsigned long)bus_info[dev->bus->number].tce_space;
-        tce_free(tbl, 0, tbl->it_size);
+
+        if (is_kdump_kernel())
+                calgary_init_bitmap_from_tce_table(tbl);
+        else
+                tce_free(tbl, 0, tbl->it_size);
 
         if (is_calgary(dev->device))
                 tbl->chip_ops = &calgary_chip_ops;
@@ -1209,6 +1216,10 @@ static int __init calgary_init(void)
         if (ret)
                 return ret;
 
+        /* Purely for kdump kernel case */
+        if (is_kdump_kernel())
+                get_tce_space_from_tar();
+
         do {
                 dev = pci_get_device(PCI_VENDOR_ID_IBM, PCI_ANY_ID, dev);
                 if (!dev)
@@ -1339,6 +1350,61 @@ static int __init calgary_bus_has_devices(int bus, unsigned short pci_dev)
         return (val != 0xffffffff);
 }
 
+/*
+ * calgary_init_bitmap_from_tce_table():
+ * Funtion for kdump case. In the second/kdump kernel initialize
+ * the bitmap based on the tce table entries obtained from first kernel
+ */
+static void calgary_init_bitmap_from_tce_table(struct iommu_table *tbl)
+{
+        u64 *tp;
+        unsigned int index;
+        tp = ((u64 *)tbl->it_base);
+        for (index = 0 ; index < tbl->it_size; index++) {
+                if (*tp != 0x0)
+                        set_bit(index, tbl->it_map);
+                tp++;
+        }
+}
+
+/*
+ * get_tce_space_from_tar():
+ * Function for kdump case. Get the tce tables from first kernel
+ * by reading the contents of the base adress register of calgary iommu
+ */
+static void get_tce_space_from_tar()
+{
+        int bus;
+        void __iomem *target;
+        unsigned long tce_space;
+
+        for (bus = 0; bus < MAX_PHB_BUS_NUM; bus++) {
+                struct calgary_bus_info *info = &bus_info[bus];
+                unsigned short pci_device;
+                u32 val;
+
+                val = read_pci_config(bus, 0, 0, 0);
+                pci_device = (val & 0xFFFF0000) >> 16;
+
+                if (!is_cal_pci_dev(pci_device))
+                        continue;
+                if (info->translation_disabled)
+                        continue;
+
+                if (calgary_bus_has_devices(bus, pci_device) ||
+                                                translate_empty_slots) {
+                        target = calgary_reg(bus_info[bus].bbar,
+                                                tar_offset(bus));
+                        tce_space = be64_to_cpu(readq(target));
+                        tce_space = tce_space & TAR_SW_BITS;
+
+                        tce_space = tce_space & (~specified_table_size);
+                        info->tce_space = (u64 *)__va(tce_space);
+                }
+        }
+        return;
+}
+
 void __init detect_calgary(void)
 {
         int bus;
@@ -1394,7 +1460,8 @@ void __init detect_calgary(void)
                 return;
         }
 
-        specified_table_size = determine_tce_table_size(max_pfn * PAGE_SIZE);
+        specified_table_size = determine_tce_table_size((is_kdump_kernel() ?
+                                        saved_max_pfn : max_pfn) * PAGE_SIZE);
 
         for (bus = 0; bus < MAX_PHB_BUS_NUM; bus++) {
                 struct calgary_bus_info *info = &bus_info[bus];
@@ -1412,10 +1479,16 @@ void __init detect_calgary(void)
 
                 if (calgary_bus_has_devices(bus, pci_device) ||
                     translate_empty_slots) {
-                        tbl = alloc_tce_table();
-                        if (!tbl)
-                                goto cleanup;
-                        info->tce_space = tbl;
+                        /*
+                         * If it is kdump kernel, find and use tce tables
+                         * from first kernel, else allocate tce tables here
+                         */
+                        if (!is_kdump_kernel()) {
+                                tbl = alloc_tce_table();
+                                if (!tbl)
+                                        goto cleanup;
+                                info->tce_space = tbl;
+                        }
                         calgary_found = 1;
                 }
         }