[PATCH] alpha: task_stack_page()

use task_stack_page() for accesses to stack page of task in alpha-specific
parts of tree

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c
index 7acad70..982d732 100644 (file)
--- a/arch/alpha/kernel/process.c
+++ b/arch/alpha/kernel/process.c
@@ -276,7 +276,7 @@ copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
 {
        extern void ret_from_fork(void);
 
-       struct thread_info *childti = p->thread_info;
+       struct thread_info *childti = task_thread_info(p);
        struct pt_regs * childregs;
        struct switch_stack * childstack, *stack;
        unsigned long stack_offset, settls;
@@ -285,7 +285,7 @@ copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
        if (!(regs->ps & 8))
                stack_offset = (PAGE_SIZE-1) & (unsigned long) regs;
        childregs = (struct pt_regs *)
-         (stack_offset + PAGE_SIZE + (long) childti);
+         (stack_offset + PAGE_SIZE + task_stack_page(p));
                
        *childregs = *regs;
        settls = regs->r20;
@@ -492,7 +492,7 @@ out:
 unsigned long
 thread_saved_pc(task_t *t)
 {
-       unsigned long base = (unsigned long)t->thread_info;
+       unsigned long base = (unsigned long)task_stack_page(t);
        unsigned long fp, sp = task_thread_info(t)->pcb.ksp;
 
        if (sp > base && sp+6*8 < base + 16*1024) {

diff --git a/arch/alpha/kernel/ptrace.c b/arch/alpha/kernel/ptrace.c
index 961008c..9069281 100644 (file)
--- a/arch/alpha/kernel/ptrace.c
+++ b/arch/alpha/kernel/ptrace.c
@@ -110,7 +110,7 @@ get_reg_addr(struct task_struct * task, unsigned long regno)
                zero = 0;
                addr = &zero;
        } else {
-               addr = (void *)task->thread_info + regoff[regno];
+               addr = task_stack_page(task) + regoff[regno];
        }
        return addr;
 }

diff --git a/include/asm-alpha/ptrace.h b/include/asm-alpha/ptrace.h
index 072375c..994680b 100644 (file)
--- a/include/asm-alpha/ptrace.h
+++ b/include/asm-alpha/ptrace.h
@@ -76,7 +76,7 @@ struct switch_stack {
 extern void show_regs(struct pt_regs *);
 
 #define alpha_task_regs(task) \
-  ((struct pt_regs *) ((long) (task)->thread_info + 2*PAGE_SIZE) - 1)
+  ((struct pt_regs *) (task_stack_page(task) + 2*PAGE_SIZE) - 1)
 
 #define force_successful_syscall_return() (alpha_task_regs(current)->r0 = 0)