Merge branch 'for-2.6.26' of master.kernel.org:/pub/scm/linux/kernel/git/jwboyer/powerpc-4xx into merge

7 files changed, 73 insertions, 74 deletions

diff --git a/arch/m68knommu/kernel/asm-offsets.c b/arch/m68knommu/kernel/asm-offsets.c
index d97b89bae53c..c785d07c02cc 100644
--- a/arch/m68knommu/kernel/asm-offsets.c
+++ b/arch/m68knommu/kernel/asm-offsets.c
@@ -13,15 +13,11 @@
 #include <linux/kernel_stat.h>
 #include <linux/ptrace.h>
 #include <linux/hardirq.h>
+#include <linux/kbuild.h>
 #include <asm/bootinfo.h>
 #include <asm/irq.h>
 #include <asm/thread_info.h>
 
-#define DEFINE(sym, val) \
-        asm volatile("\n->" #sym " %0 " #val : : "i" (val))
-
-#define BLANK() asm volatile("\n->" : : )
-
 int main(void)
 {
         /* offsets into the task struct */
@@ -91,6 +87,7 @@ int main(void)
         DEFINE(TI_TASK, offsetof(struct thread_info, task));
         DEFINE(TI_EXECDOMAIN, offsetof(struct thread_info, exec_domain));
         DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
+        DEFINE(TI_PREEMPTCOUNT, offsetof(struct thread_info, preempt_count));
         DEFINE(TI_CPU, offsetof(struct thread_info, cpu));
 
         return 0;
diff --git a/arch/m68knommu/kernel/entry.S b/arch/m68knommu/kernel/entry.S
index 1e7ea6a3e1a1..f4782d2dce8f 100644
--- a/arch/m68knommu/kernel/entry.S
+++ b/arch/m68knommu/kernel/entry.S
@@ -32,6 +32,7 @@
 #include <asm/segment.h>
 #include <asm/asm-offsets.h>
 #include <asm/entry.h>
+#include <asm/unistd.h>
 
 .text
 
@@ -140,3 +141,11 @@ ENTRY(sys_rt_sigreturn)
         RESTORE_SWITCH_STACK
         rts
 
+ENTRY(ret_from_user_signal)
+        moveq #__NR_sigreturn,%d0
+        trap #0
+
+ENTRY(ret_from_user_rt_signal)
+        move #__NR_rt_sigreturn,%d0
+        trap #0
+
diff --git a/arch/m68knommu/kernel/setup.c b/arch/m68knommu/kernel/setup.c
index d6f0200316fe..03f4fe6a2fc0 100644
--- a/arch/m68knommu/kernel/setup.c
+++ b/arch/m68knommu/kernel/setup.c
@@ -162,7 +162,7 @@ void __init setup_arch(char **cmdline_p)
         printk(KERN_INFO "DragonEngine II board support by Georges Menie\n");
 #endif
 #ifdef CONFIG_M5235EVB
-        printk(KERN_INFO "Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)");
+        printk(KERN_INFO "Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n");
 #endif
 
 #ifdef DEBUG
diff --git a/arch/m68knommu/kernel/signal.c b/arch/m68knommu/kernel/signal.c
index 70371378db86..bbfcae9e52b4 100644
--- a/arch/m68knommu/kernel/signal.c
+++ b/arch/m68knommu/kernel/signal.c
@@ -51,6 +51,8 @@
 
 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
 
+void ret_from_user_signal(void);
+void ret_from_user_rt_signal(void);
 asmlinkage int do_signal(sigset_t *oldset, struct pt_regs *regs);
 
 /*
@@ -539,10 +541,6 @@ static inline int rt_setup_ucontext(struct ucontext *uc, struct pt_regs *regs)
         return err;
 }
 
-static inline void push_cache (unsigned long vaddr)
-{
-}
-
 static inline void *
 get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
 {
@@ -586,16 +584,11 @@ static void setup_frame (int sig, struct k_sigaction *ka,
         err |= copy_to_user (&frame->sc, &context, sizeof(context));
 
         /* Set up to return from userspace.  */
-        err |= __put_user(frame->retcode, &frame->pretcode);
-        /* moveq #,d0; trap #0 */
-        err |= __put_user(0x70004e40 + (__NR_sigreturn << 16),
-                          (long *)(frame->retcode));
+        err |= __put_user((void *) ret_from_user_signal, &frame->pretcode);
 
         if (err)
                 goto give_sigsegv;
 
-        push_cache ((unsigned long) &frame->retcode);
-
         /* Set up registers for signal handler */
         wrusp ((unsigned long) frame);
         regs->pc = (unsigned long) ka->sa.sa_handler;
@@ -655,17 +648,11 @@ static void setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info,
         err |= copy_to_user (&frame->uc.uc_sigmask, set, sizeof(*set));
 
         /* Set up to return from userspace.  */
-        err |= __put_user(frame->retcode, &frame->pretcode);
-        /* moveq #,d0; notb d0; trap #0 */
-        err |= __put_user(0x70004600 + ((__NR_rt_sigreturn ^ 0xff) << 16),
-                          (long *)(frame->retcode + 0));
-        err |= __put_user(0x4e40, (short *)(frame->retcode + 4));
+        err |= __put_user((void *) ret_from_user_rt_signal, &frame->pretcode);
 
         if (err)
                 goto give_sigsegv;
 
-        push_cache ((unsigned long) &frame->retcode);
-
         /* Set up registers for signal handler */
         wrusp ((unsigned long) frame);
         regs->pc = (unsigned long) ka->sa.sa_handler;
diff --git a/arch/m68knommu/kernel/sys_m68k.c b/arch/m68knommu/kernel/sys_m68k.c
index 65f7a95f056e..700281638629 100644
--- a/arch/m68knommu/kernel/sys_m68k.c
+++ b/arch/m68knommu/kernel/sys_m68k.c
@@ -28,23 +28,6 @@
 #include <asm/cacheflush.h>
 #include <asm/unistd.h>
 
-/*
- * sys_pipe() is the normal C calling standard for creating
- * a pipe. It's not the way unix traditionally does this, though.
- */
-asmlinkage int sys_pipe(unsigned long * fildes)
-{
-        int fd[2];
-        int error;
-
-        error = do_pipe(fd);
-        if (!error) {
-                if (copy_to_user(fildes, fd, 2*sizeof(int)))
-                        error = -EFAULT;
-        }
-        return error;
-}
-
 /* common code for old and new mmaps */
 static inline long do_mmap2(
         unsigned long addr, unsigned long len,
diff --git a/arch/m68knommu/kernel/traps.c b/arch/m68knommu/kernel/traps.c
index 437a061d8b94..ec9aea652e79 100644
--- a/arch/m68knommu/kernel/traps.c
+++ b/arch/m68knommu/kernel/traps.c
@@ -28,6 +28,7 @@
 #include <linux/linkage.h>
 #include <linux/init.h>
 #include <linux/ptrace.h>
+#include <linux/kallsyms.h>
 
 #include <asm/setup.h>
 #include <asm/fpu.h>
@@ -102,56 +103,47 @@ asmlinkage void buserr_c(struct frame *fp)
         force_sig(SIGSEGV, current);
 }
 
-
 int kstack_depth_to_print = 48;
 
-void show_stack(struct task_struct *task, unsigned long *stack)
+static void __show_stack(struct task_struct *task, unsigned long *stack)
 {
         unsigned long *endstack, addr;
-        extern char _start, _etext;
+        unsigned long *last_stack;
         int i;
 
-        if (!stack) {
-                if (task)
-                        stack = (unsigned long *)task->thread.ksp;
-                else
-                        stack = (unsigned long *)&stack;
-        }
+        if (!stack)
+                stack = (unsigned long *)task->thread.ksp;
 
         addr = (unsigned long) stack;
         endstack = (unsigned long *) PAGE_ALIGN(addr);
 
         printk(KERN_EMERG "Stack from %08lx:", (unsigned long)stack);
         for (i = 0; i < kstack_depth_to_print; i++) {
-                if (stack + 1 > endstack)
+                if (stack + 1 + i > endstack)
                         break;
                 if (i % 8 == 0)
                         printk("\n" KERN_EMERG "       ");
-                printk(" %08lx", *stack++);
+                printk(" %08lx", *(stack + i));
         }
         printk("\n");
 
-        printk(KERN_EMERG "Call Trace:");
-        i = 0;
-        while (stack + 1 <= endstack) {
-                addr = *stack++;
-                /*
-                 * If the address is either in the text segment of the
-                 * kernel, or in the region which contains vmalloc'ed
-                 * memory, it *may* be the address of a calling
-                 * routine; if so, print it so that someone tracing
-                 * down the cause of the crash will be able to figure
-                 * out the call path that was taken.
-                 */
-                if (((addr >= (unsigned long) &_start) &&
-                     (addr <= (unsigned long) &_etext))) {
-                        if (i % 4 == 0)
-                                printk("\n" KERN_EMERG "       ");
-                        printk(" [<%08lx>]", addr);
-                        i++;
-                }
+#ifdef CONFIG_FRAME_POINTER
+        printk(KERN_EMERG "Call Trace:\n");
+
+        last_stack = stack - 1;
+        while (stack <= endstack && stack > last_stack) {
+
+                addr = *(stack + 1);
+                printk(KERN_EMERG " [%08lx] ", addr);
+                print_symbol(KERN_CONT "%s\n", addr);
+
+                last_stack = stack;
+                stack = (unsigned long *)*stack;
         }
         printk("\n");
+#else
+        printk(KERN_EMERG "CONFIG_FRAME_POINTER disabled, no symbolic call trace\n");
+#endif
 }
 
 void bad_super_trap(struct frame *fp)
@@ -298,19 +290,47 @@ asmlinkage void set_esp0(unsigned long ssp)
         current->thread.esp0 = ssp;
 }
 
-
 /*
  * The architecture-independent backtrace generator
  */
 void dump_stack(void)
 {
-        unsigned long stack;
+        /*
+         * We need frame pointers for this little trick, which works as follows:
+         *
+         * +------------+ 0x00
+         * | Next SP    |       -> 0x0c
+         * +------------+ 0x04
+         * | Caller     |
+         * +------------+ 0x08
+         * | Local vars |       -> our stack var
+         * +------------+ 0x0c
+         * | Next SP    |       -> 0x18, that is what we pass to show_stack()
+         * +------------+ 0x10
+         * | Caller     |
+         * +------------+ 0x14
+         * | Local vars |
+         * +------------+ 0x18
+         * | ...        |
+         * +------------+
+         */
 
-        show_stack(current, &stack);
-}
+        unsigned long *stack;
 
+        stack = (unsigned long *)&stack;
+        stack++;
+        __show_stack(current, stack);
+}
 EXPORT_SYMBOL(dump_stack);
 
+void show_stack(struct task_struct *task, unsigned long *stack)
+{
+        if (!stack && !task)
+                dump_stack();
+        else
+                __show_stack(task, stack);
+}
+
 #ifdef CONFIG_M68KFPU_EMU
 asmlinkage void fpemu_signal(int signal, int code, void *addr)
 {
diff --git a/arch/m68knommu/kernel/vmlinux.lds.S b/arch/m68knommu/kernel/vmlinux.lds.S
index b44edb08e212..5592e0bf951f 100644
--- a/arch/m68knommu/kernel/vmlinux.lds.S
+++ b/arch/m68knommu/kernel/vmlinux.lds.S
@@ -64,6 +64,7 @@ SECTIONS {
                 _stext = . ;
                 TEXT_TEXT
                 SCHED_TEXT
+                LOCK_TEXT
                 *(.text.lock)
 
                 . = ALIGN(16);          /* Exception table              */
@@ -73,6 +74,7 @@ SECTIONS {
 
                 *(.rodata) *(.rodata.*)
                 *(__vermagic)           /* Kernel version magic */
+                *(__markers_strings)
                 *(.rodata1)
                 *(.rodata.str1.1)
 
@@ -182,6 +184,7 @@ SECTIONS {
                 *(COMMON)
                 . = ALIGN(4) ;
                 _ebss = . ;
+                _end = . ;
         } > BSS
 
 }