Automatic merge of master.kernel.org:/home/rmk/linux-2.6-rmk.git

11 files changed, 74 insertions, 47 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 8bfcb37460fa..bf397a9f8ac2 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -85,6 +85,7 @@ choice
 config ARCH_CLPS7500
         bool "Cirrus-CL-PS7500FE"
         select TIMER_ACORN
+        select ISA
 
 config ARCH_CLPS711X
         bool "CLPS711x/EP721x-based"
@@ -96,6 +97,7 @@ config ARCH_CO285
 
 config ARCH_EBSA110
         bool "EBSA-110"
+        select ISA
         help
           This is an evaluation board for the StrongARM processor available
           from Digital. It has limited hardware on-board, including an onboard
@@ -120,13 +122,16 @@ config ARCH_INTEGRATOR
 
 config ARCH_IOP3XX
         bool "IOP3xx-based"
+        select PCI
 
 config ARCH_IXP4XX
         bool "IXP4xx-based"
         select DMABOUNCE
+        select PCI
 
 config ARCH_IXP2000
         bool "IXP2400/2800-based"
+        select PCI
 
 config ARCH_L7200
         bool "LinkUp-L7200"
@@ -155,6 +160,8 @@ config ARCH_RPC
 
 config ARCH_SA1100
         bool "SA1100-based"
+        select ISA
+        select DISCONTIGMEM
 
 config ARCH_S3C2410
         bool "Samsung S3C2410"
@@ -165,6 +172,9 @@ config ARCH_S3C2410
 
 config ARCH_SHARK
         bool "Shark"
+        select ISA
+        select ISA_DMA
+        select PCI
 
 config ARCH_LH7A40X
         bool "Sharp LH7A40X"
@@ -252,8 +262,6 @@ config ARM_AMBA
 
 config ISA
         bool
-        depends on FOOTBRIDGE_HOST || ARCH_SHARK || ARCH_CLPS7500 || ARCH_EBSA110 || ARCH_CDB89712 || ARCH_EDB7211 || ARCH_SA1100 || ARCH_MX1ADS
-        default y
         help
           Find out whether you have ISA slots on your motherboard.  ISA is the
           name of a bus system, i.e. the way the CPU talks to the other stuff
@@ -263,8 +271,6 @@ config ISA
 
 config ISA_DMA
         bool
-        depends on FOOTBRIDGE_HOST || ARCH_SHARK
-        default y
 
 config ISA_DMA_API
         bool
@@ -272,7 +278,6 @@ config ISA_DMA_API
 
 config PCI
         bool "PCI support" if ARCH_INTEGRATOR_AP
-        default y if ARCH_SHARK || FOOTBRIDGE_HOST || ARCH_IOP3XX || ARCH_IXP4XX || ARCH_IXP2000
         help
           Find out whether you have a PCI motherboard. PCI is the name of a
           bus system, i.e. the way the CPU talks to the other stuff inside
@@ -300,7 +305,7 @@ menu "Kernel Features"
 
 config SMP
         bool "Symmetric Multi-Processing (EXPERIMENTAL)"
-        depends on EXPERIMENTAL && n
+        depends on EXPERIMENTAL #&& n
         help
           This enables support for systems with more than one CPU. If you have
           a system with only one CPU, like most personal computers, say N. If
@@ -340,8 +345,7 @@ config PREEMPT
 
 config DISCONTIGMEM
         bool
-        depends on ARCH_EDB7211 || ARCH_SA1100 || (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
-        default y
+        default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
         help
           Say Y to support efficient handling of discontiguous physical memory,
           for architectures which are either NUMA (Non-Uniform Memory Access)
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index 080df907f242..4eb36155dc93 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -17,8 +17,8 @@
 
 #include <asm/glue.h>
 #include <asm/vfpmacros.h>
-#include <asm/hardware.h>               @ should be moved into entry-macro.S
-#include <asm/arch/irqs.h>              @ should be moved into entry-macro.S
+#include <asm/hardware.h>               /* should be moved into entry-macro.S */
+#include <asm/arch/irqs.h>              /* should be moved into entry-macro.S */
 #include <asm/arch/entry-macro.S>
 
 #include "entry-header.S"
@@ -505,9 +505,9 @@ ENTRY(__switch_to)
         mra     r4, r5, acc0
         stmia   ip, {r4, r5}
 #endif
-#ifdef CONFIG_HAS_TLS_REG
+#if defined(CONFIG_HAS_TLS_REG)
         mcr     p15, 0, r3, c13, c0, 3          @ set TLS register
-#else
+#elif !defined(CONFIG_TLS_REG_EMUL)
         mov     r4, #0xffff0fff
         str     r3, [r4, #-15]                  @ TLS val at 0xffff0ff0
 #endif
@@ -690,11 +690,7 @@ __kuser_cmpxchg:				@ 0xffff0fc0
 
 __kuser_get_tls:                                @ 0xffff0fe0
 
-#ifndef CONFIG_HAS_TLS_REG
-
-#ifdef CONFIG_SMP  /* sanity check */
-#error "CONFIG_SMP without CONFIG_HAS_TLS_REG is wrong"
-#endif
+#if !defined(CONFIG_HAS_TLS_REG) && !defined(CONFIG_TLS_REG_EMUL)
 
         ldr     r0, [pc, #(16 - 8)]             @ TLS stored at 0xffff0ff0
         mov     pc, lr
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index 171b3e811c71..4733877296d4 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -19,6 +19,7 @@
 #include <asm/procinfo.h>
 #include <asm/ptrace.h>
 #include <asm/constants.h>
+#include <asm/thread_info.h>
 #include <asm/system.h>
 
 #define PROCINFO_MMUFLAGS       8
@@ -131,7 +132,7 @@ __switch_data:
         .long   processor_id                    @ r4
         .long   __machine_arch_type             @ r5
         .long   cr_alignment                    @ r6
-        .long   init_thread_union+8192          @ sp
+        .long   init_thread_union + THREAD_START_SP @ sp
 
 /*
  * The following fragment of code is executed with the MMU on, and uses
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 26eacd3e5def..8f146a4b4752 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -256,8 +256,6 @@ static unsigned long *thread_info_head;
 static unsigned int nr_thread_info;
 
 #define EXTRA_TASK_STRUCT       4
-#define ll_alloc_task_struct() ((struct thread_info *) __get_free_pages(GFP_KERNEL,1))
-#define ll_free_task_struct(p) free_pages((unsigned long)(p),1)
 
 struct thread_info *alloc_thread_info(struct task_struct *task)
 {
@@ -274,17 +272,16 @@ struct thread_info *alloc_thread_info(struct task_struct *task)
         }
 
         if (!thread)
-                thread = ll_alloc_task_struct();
+                thread = (struct thread_info *)
+                           __get_free_pages(GFP_KERNEL, THREAD_SIZE_ORDER);
 
-#ifdef CONFIG_MAGIC_SYSRQ
+#ifdef CONFIG_DEBUG_STACK_USAGE
         /*
          * The stack must be cleared if you want SYSRQ-T to
          * give sensible stack usage information
          */
-        if (thread) {
-                char *p = (char *)thread;
-                memzero(p+KERNEL_STACK_SIZE, KERNEL_STACK_SIZE);
-        }
+        if (thread)
+                memzero(thread, THREAD_SIZE);
 #endif
         return thread;
 }
@@ -297,7 +294,7 @@ void free_thread_info(struct thread_info *thread)
                 thread_info_head = p;
                 nr_thread_info += 1;
         } else
-                ll_free_task_struct(thread);
+                free_pages((unsigned long)thread, THREAD_SIZE_ORDER);
 }
 
 /*
@@ -350,7 +347,7 @@ copy_thread(int nr, unsigned long clone_flags, unsigned long stack_start,
         struct thread_info *thread = p->thread_info;
         struct pt_regs *childregs;
 
-        childregs = ((struct pt_regs *)((unsigned long)thread + THREAD_SIZE - 8)) - 1;
+        childregs = ((struct pt_regs *)((unsigned long)thread + THREAD_START_SP)) - 1;
         *childregs = *regs;
         childregs->ARM_r0 = 0;
         childregs->ARM_sp = stack_start;
@@ -447,15 +444,17 @@ EXPORT_SYMBOL(kernel_thread);
 unsigned long get_wchan(struct task_struct *p)
 {
         unsigned long fp, lr;
-        unsigned long stack_page;
+        unsigned long stack_start, stack_end;
         int count = 0;
         if (!p || p == current || p->state == TASK_RUNNING)
                 return 0;
 
-        stack_page = 4096 + (unsigned long)p->thread_info;
+        stack_start = (unsigned long)(p->thread_info + 1);
+        stack_end = ((unsigned long)p->thread_info) + THREAD_SIZE;
+
         fp = thread_saved_fp(p);
         do {
-                if (fp < stack_page || fp > 4092+stack_page)
+                if (fp < stack_start || fp > stack_end)
                         return 0;
                 lr = pc_pointer (((unsigned long *)fp)[-1]);
                 if (!in_sched_functions(lr))
diff --git a/arch/arm/kernel/sys_arm.c b/arch/arm/kernel/sys_arm.c
index ef32577da304..f897ce2ccf0d 100644
--- a/arch/arm/kernel/sys_arm.c
+++ b/arch/arm/kernel/sys_arm.c
@@ -302,7 +302,7 @@ long execve(const char *filename, char **argv, char **envp)
                 "b      ret_to_user"
                 :
                 : "r" (current_thread_info()),
-                  "Ir" (THREAD_SIZE - 8 - sizeof(regs)),
+                  "Ir" (THREAD_START_SP - sizeof(regs)),
                   "r" (&regs),
                   "Ir" (sizeof(regs))
                 : "r0", "r1", "r2", "r3", "ip", "memory");
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index 3a001fe5540b..14df16b983f4 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -218,7 +218,8 @@ NORET_TYPE void die(const char *str, struct pt_regs *regs, int err)
                 tsk->comm, tsk->pid, tsk->thread_info + 1);
 
         if (!user_mode(regs) || in_interrupt()) {
-                dump_mem("Stack: ", regs->ARM_sp, 8192+(unsigned long)tsk->thread_info);
+                dump_mem("Stack: ", regs->ARM_sp,
+                         THREAD_SIZE + (unsigned long)tsk->thread_info);
                 dump_backtrace(regs, tsk);
                 dump_instr(regs);
         }
@@ -450,9 +451,9 @@ asmlinkage int arm_syscall(int no, struct pt_regs *regs)
 
         case NR(set_tls):
                 thread->tp_value = regs->ARM_r0;
-#ifdef CONFIG_HAS_TLS_REG
+#if defined(CONFIG_HAS_TLS_REG)
                 asm ("mcr p15, 0, %0, c13, c0, 3" : : "r" (regs->ARM_r0) );
-#else
+#elif !defined(CONFIG_TLS_REG_EMUL)
                 /*
                  * User space must never try to access this directly.
                  * Expect your app to break eventually if you do so.
@@ -497,11 +498,14 @@ asmlinkage int arm_syscall(int no, struct pt_regs *regs)
         return 0;
 }
 
-#if defined(CONFIG_CPU_32v6) && !defined(CONFIG_HAS_TLS_REG)
+#ifdef CONFIG_TLS_REG_EMUL
 
 /*
  * We might be running on an ARMv6+ processor which should have the TLS
- * register, but for some reason we can't use it and have to emulate it.
+ * register but for some reason we can't use it, or maybe an SMP system
+ * using a pre-ARMv6 processor (there are apparently a few prototypes like
+ * that in existence) and therefore access to that register must be
+ * emulated.
  */
 
 static int get_tp_trap(struct pt_regs *regs, unsigned int instr)
diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S
index a39c6a42d68a..ad2d66c93a5c 100644
--- a/arch/arm/kernel/vmlinux.lds.S
+++ b/arch/arm/kernel/vmlinux.lds.S
@@ -5,6 +5,7 @@
 
 #include <asm-generic/vmlinux.lds.h>
 #include <linux/config.h>
+#include <asm/thread_info.h>
         
 OUTPUT_ARCH(arm)
 ENTRY(stext)
@@ -103,7 +104,7 @@ SECTIONS
         __data_loc = ALIGN(4);          /* location in binary */
         . = DATAADDR;
 #else
-        . = ALIGN(8192);
+        . = ALIGN(THREAD_SIZE);
         __data_loc = .;
 #endif
 
diff --git a/arch/arm/mach-clps711x/Kconfig b/arch/arm/mach-clps711x/Kconfig
index f6e676322ca9..45c930ccd064 100644
--- a/arch/arm/mach-clps711x/Kconfig
+++ b/arch/arm/mach-clps711x/Kconfig
@@ -10,6 +10,7 @@ config ARCH_AUTCPU12
 
 config ARCH_CDB89712
         bool "CDB89712"
+        select ISA
         help
           This is an evaluation board from Cirrus for the CS89712 processor.
           The board includes 2 serial ports, Ethernet, IRDA, and expansion
@@ -26,6 +27,8 @@ config ARCH_CLEP7312
 
 config ARCH_EDB7211
         bool "EDB7211"
+        select ISA
+        select DISCONTIGMEM
         help
           Say Y here if you intend to run this kernel on a Cirrus Logic EDB-7211
           evaluation board.
diff --git a/arch/arm/mach-footbridge/Kconfig b/arch/arm/mach-footbridge/Kconfig
index 1090c680b6dd..324d9edeec38 100644
--- a/arch/arm/mach-footbridge/Kconfig
+++ b/arch/arm/mach-footbridge/Kconfig
@@ -5,6 +5,9 @@ menu "Footbridge Implementations"
 config ARCH_CATS
         bool "CATS"
         select FOOTBRIDGE_HOST
+        select ISA
+        select ISA_DMA
+        select PCI
         help
           Say Y here if you intend to run this kernel on the CATS.
 
@@ -13,6 +16,9 @@ config ARCH_CATS
 config ARCH_PERSONAL_SERVER
         bool "Compaq Personal Server"
         select FOOTBRIDGE_HOST
+        select ISA
+        select ISA_DMA
+        select PCI
         ---help---
           Say Y here if you intend to run this kernel on the Compaq
           Personal Server.
@@ -42,6 +48,9 @@ config ARCH_EBSA285_HOST
         bool "EBSA285 (host mode)"
         select ARCH_EBSA285
         select FOOTBRIDGE_HOST
+        select ISA
+        select ISA_DMA
+        select PCI
         help
           Say Y here if you intend to run this kernel on the EBSA285 card
           in host ("central function") mode.
@@ -51,6 +60,9 @@ config ARCH_EBSA285_HOST
 config ARCH_NETWINDER
         bool "NetWinder"
         select FOOTBRIDGE_HOST
+        select ISA
+        select ISA_DMA
+        select PCI
         help
           Say Y here if you intend to run this kernel on the Rebel.COM
           NetWinder.  Information about this machine can be found at:
diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index ec85813ee5dc..cddd194ac6eb 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -4,6 +4,7 @@ menu "IMX Implementations"
 config ARCH_MX1ADS
         bool "mx1ads"
         depends on ARCH_IMX
+        select ISA
         help
           Say Y here if you are using the Motorola MX1ADS board
 
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index 27892e34b060..c4fc6be629de 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -410,17 +410,23 @@ config CPU_BPREDICT_DISABLE
         help
           Say Y here to disable branch prediction.  If unsure, say N.
 
+config TLS_REG_EMUL
+        bool
+        default y if (SMP || CPU_32v6) && (CPU_32v5 || CPU_32v4 || CPU_32v3)
+        help
+          We might be running on an ARMv6+ processor which should have the TLS
+          register but for some reason we can't use it, or maybe an SMP system
+          using a pre-ARMv6 processor (there are apparently a few prototypes
+          like that in existence) and therefore access to that register must
+          be emulated.
+
 config HAS_TLS_REG
         bool
-        depends on CPU_32v6 && !CPU_32v5 && !CPU_32v4 && !CPU_32v3
-        default y
+        depends on CPU_32v6
+        default y if !TLS_REG_EMUL
         help
           This selects support for the CP15 thread register.
-          It is defined to be available on ARMv6 or later.  However
-          if the kernel is configured to support multiple CPUs including
-          a pre-ARMv6 processors, or if a given ARMv6 processor doesn't
-          implement the thread register for some reason, then access to
-          this register from user space must be trapped and emulated.
-          If user space is relying on the __kuser_get_tls code then
-          there should not be any impact.
+          It is defined to be available on ARMv6 or later.  If a particular
+          ARMv6 or later CPU doesn't support it then it must omc;ide "select
+          TLS_REG_EMUL" along with its other caracteristics.