Merge branch 'wip-2.6.34' into old-private-masterarchived-private-master

1 files changed, 18 insertions, 177 deletions

diff --git a/arch/sh/kernel/traps_32.c b/arch/sh/kernel/traps_32.c
index 7a2ee3a6b8e7..c3d86fa71ddf 100644
--- a/arch/sh/kernel/traps_32.c
+++ b/arch/sh/kernel/traps_32.c
@@ -24,10 +24,10 @@
 #include <linux/kdebug.h>
 #include <linux/kexec.h>
 #include <linux/limits.h>
-#include <linux/proc_fs.h>
 #include <linux/sysfs.h>
+#include <linux/uaccess.h>
 #include <asm/system.h>
-#include <asm/uaccess.h>
+#include <asm/alignment.h>
 #include <asm/fpu.h>
 #include <asm/kprobes.h>
 
@@ -46,85 +46,6 @@
 #define TRAP_ILLEGAL_SLOT_INST  13
 #endif
 
-static unsigned long se_user;
-static unsigned long se_sys;
-static unsigned long se_half;
-static unsigned long se_word;
-static unsigned long se_dword;
-static unsigned long se_multi;
-/* bitfield: 1: warn 2: fixup 4: signal -> combinations 2|4 && 1|2|4 are not
-   valid! */
-static int se_usermode = 3;
-/* 0: no warning 1: print a warning message, disabled by default */
-static int se_kernmode_warn;
-
-#ifdef CONFIG_PROC_FS
-static const char *se_usermode_action[] = {
-        "ignored",
-        "warn",
-        "fixup",
-        "fixup+warn",
-        "signal",
-        "signal+warn"
-};
-
-static int
-proc_alignment_read(char *page, char **start, off_t off, int count, int *eof,
-                    void *data)
-{
-        char *p = page;
-        int len;
-
-        p += sprintf(p, "User:\t\t%lu\n", se_user);
-        p += sprintf(p, "System:\t\t%lu\n", se_sys);
-        p += sprintf(p, "Half:\t\t%lu\n", se_half);
-        p += sprintf(p, "Word:\t\t%lu\n", se_word);
-        p += sprintf(p, "DWord:\t\t%lu\n", se_dword);
-        p += sprintf(p, "Multi:\t\t%lu\n", se_multi);
-        p += sprintf(p, "User faults:\t%i (%s)\n", se_usermode,
-                        se_usermode_action[se_usermode]);
-        p += sprintf(p, "Kernel faults:\t%i (fixup%s)\n", se_kernmode_warn,
-                        se_kernmode_warn ? "+warn" : "");
-
-        len = (p - page) - off;
-        if (len < 0)
-                len = 0;
-
-        *eof = (len <= count) ? 1 : 0;
-        *start = page + off;
-
-        return len;
-}
-
-static int proc_alignment_write(struct file *file, const char __user *buffer,
-                                unsigned long count, void *data)
-{
-        char mode;
-
-        if (count > 0) {
-                if (get_user(mode, buffer))
-                        return -EFAULT;
-                if (mode >= '0' && mode <= '5')
-                        se_usermode = mode - '0';
-        }
-        return count;
-}
-
-static int proc_alignment_kern_write(struct file *file, const char __user *buffer,
-                                     unsigned long count, void *data)
-{
-        char mode;
-
-        if (count > 0) {
-                if (get_user(mode, buffer))
-                        return -EFAULT;
-                if (mode >= '0' && mode <= '1')
-                        se_kernmode_warn = mode - '0';
-        }
-        return count;
-}
-#endif
-
 static void dump_mem(const char *str, unsigned long bottom, unsigned long top)
 {
         unsigned long p;
@@ -276,10 +197,10 @@ static int handle_unaligned_ins(insn_size_t instruction, struct pt_regs *regs,
         count = 1<<(instruction&3);
 
         switch (count) {
-        case 1: se_half  += 1; break;
-        case 2: se_word  += 1; break;
-        case 4: se_dword += 1; break;
-        case 8: se_multi += 1; break; /* ??? */
+        case 1: inc_unaligned_byte_access(); break;
+        case 2: inc_unaligned_word_access(); break;
+        case 4: inc_unaligned_dword_access(); break;
+        case 8: inc_unaligned_multi_access(); break;
         }
 
         ret = -EFAULT;
@@ -463,12 +384,8 @@ int handle_unaligned_access(insn_size_t instruction, struct pt_regs *regs,
         rm = regs->regs[index];
 
         /* shout about fixups */
-        if (!expected && printk_ratelimit())
-                printk(KERN_NOTICE "Fixing up unaligned %s access "
-                       "in \"%s\" pid=%d pc=0x%p ins=0x%04hx\n",
-                       user_mode(regs) ? "userspace" : "kernel",
-                       current->comm, task_pid_nr(current),
-                       (void *)regs->pc, instruction);
+        if (!expected)
+                unaligned_fixups_notify(current, instruction, regs);
 
         ret = -EFAULT;
         switch (instruction&0xF000) {
@@ -621,10 +538,10 @@ asmlinkage void do_address_error(struct pt_regs *regs,
 
         if (user_mode(regs)) {
                 int si_code = BUS_ADRERR;
+                unsigned int user_action;
 
                 local_irq_enable();
-
-                se_user += 1;
+                inc_unaligned_user_access();
 
                 set_fs(USER_DS);
                 if (copy_from_user(&instruction, (insn_size_t *)(regs->pc & ~1),
@@ -635,16 +552,12 @@ asmlinkage void do_address_error(struct pt_regs *regs,
                 set_fs(oldfs);
 
                 /* shout about userspace fixups */
-                if (se_usermode & 1)
-                        printk(KERN_NOTICE "Unaligned userspace access "
-                               "in \"%s\" pid=%d pc=0x%p ins=0x%04hx\n",
-                               current->comm, current->pid, (void *)regs->pc,
-                               instruction);
+                unaligned_fixups_notify(current, instruction, regs);
 
-                if (se_usermode & 2)
+                user_action = unaligned_user_action();
+                if (user_action & UM_FIXUP)
                         goto fixup;
-
-                if (se_usermode & 4)
+                if (user_action & UM_SIGNAL)
                         goto uspace_segv;
                 else {
                         /* ignore */
@@ -664,7 +577,7 @@ fixup:
                                               &user_mem_access, 0);
                 set_fs(oldfs);
 
-                if (tmp==0)
+                if (tmp == 0)
                         return; /* sorted */
 uspace_segv:
                 printk(KERN_NOTICE "Sending SIGBUS to \"%s\" due to unaligned "
@@ -677,7 +590,7 @@ uspace_segv:
                 info.si_addr = (void __user *)address;
                 force_sig_info(SIGBUS, &info, current);
         } else {
-                se_sys += 1;
+                inc_unaligned_kernel_access();
 
                 if (regs->pc & 1)
                         die("unaligned program counter", regs, error_code);
@@ -692,11 +605,7 @@ uspace_segv:
                         die("insn faulting in do_address_error", regs, 0);
                 }
 
-                if (se_kernmode_warn)
-                        printk(KERN_NOTICE "Unaligned kernel access "
-                               "on behalf of \"%s\" pid=%d pc=0x%p ins=0x%04hx\n",
-                               current->comm, current->pid, (void *)regs->pc,
-                               instruction);
+                unaligned_fixups_notify(current, instruction, regs);
 
                 handle_unaligned_access(instruction, regs,
                                         &user_mem_access, 0);
@@ -881,35 +790,10 @@ asmlinkage void do_exception_error(unsigned long r4, unsigned long r5,
         die_if_kernel("exception", regs, ex);
 }
 
-#if defined(CONFIG_SH_STANDARD_BIOS)
-void *gdb_vbr_vector;
-
-static inline void __init gdb_vbr_init(void)
-{
-        register unsigned long vbr;
-
-        /*
-         * Read the old value of the VBR register to initialise
-         * the vector through which debug and BIOS traps are
-         * delegated by the Linux trap handler.
-         */
-        asm volatile("stc vbr, %0" : "=r" (vbr));
-
-        gdb_vbr_vector = (void *)(vbr + 0x100);
-        printk("Setting GDB trap vector to 0x%08lx\n",
-               (unsigned long)gdb_vbr_vector);
-}
-#endif
-
 void __cpuinit per_cpu_trap_init(void)
 {
         extern void *vbr_base;
 
-#ifdef CONFIG_SH_STANDARD_BIOS
-        if (raw_smp_processor_id() == 0)
-                gdb_vbr_init();
-#endif
-
         /* NOTE: The VBR value should be at P1
            (or P2, virtural "fixed" address space).
            It's definitely should not in physical address.  */
@@ -945,14 +829,9 @@ void __init trap_init(void)
         set_exception_table_evt(0x800, do_reserved_inst);
         set_exception_table_evt(0x820, do_illegal_slot_inst);
 #elif defined(CONFIG_SH_FPU)
-#ifdef CONFIG_CPU_SUBTYPE_SHX3
-        set_exception_table_evt(0xd80, fpu_state_restore_trap_handler);
-        set_exception_table_evt(0xda0, fpu_state_restore_trap_handler);
-#else
         set_exception_table_evt(0x800, fpu_state_restore_trap_handler);
         set_exception_table_evt(0x820, fpu_state_restore_trap_handler);
 #endif
-#endif
 
 #ifdef CONFIG_CPU_SH2
         set_exception_table_vec(TRAP_ADDRESS_ERROR, address_error_trap_handler);
@@ -966,11 +845,8 @@ void __init trap_init(void)
 #endif
 
 #ifdef TRAP_UBC
-        set_exception_table_vec(TRAP_UBC, break_point_trap);
+        set_exception_table_vec(TRAP_UBC, breakpoint_trap_handler);
 #endif
-
-        /* Setup VBR for boot cpu */
-        per_cpu_trap_init();
 }
 
 void show_stack(struct task_struct *tsk, unsigned long *sp)
@@ -995,38 +871,3 @@ void dump_stack(void)
         show_stack(NULL, NULL);
 }
 EXPORT_SYMBOL(dump_stack);
-
-#ifdef CONFIG_PROC_FS
-/*
- * This needs to be done after sysctl_init, otherwise sys/ will be
- * overwritten.  Actually, this shouldn't be in sys/ at all since
- * it isn't a sysctl, and it doesn't contain sysctl information.
- * We now locate it in /proc/cpu/alignment instead.
- */
-static int __init alignment_init(void)
-{
-        struct proc_dir_entry *dir, *res;
-
-        dir = proc_mkdir("cpu", NULL);
-        if (!dir)
-                return -ENOMEM;
-
-        res = create_proc_entry("alignment", S_IWUSR | S_IRUGO, dir);
-        if (!res)
-                return -ENOMEM;
-
-        res->read_proc = proc_alignment_read;
-        res->write_proc = proc_alignment_write;
-
-        res = create_proc_entry("kernel_alignment", S_IWUSR | S_IRUGO, dir);
-        if (!res)
-                return -ENOMEM;
-
-        res->read_proc = proc_alignment_read;
-        res->write_proc = proc_alignment_kern_write;
-
-        return 0;
-}
-
-fs_initcall(alignment_init);
-#endif