[PATCH] alpha: task_pt_regs()

)

From: Al Viro <viro@ftp.linux.org.uk>

rename alpha_task_regs() to task_pt_regs(), switch open-coded instances
to use of the helper.

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>

2 files changed, 9 insertions, 17 deletions

diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c
index 982d732a8705..9924fd07743a 100644
--- a/arch/alpha/kernel/process.c
+++ b/arch/alpha/kernel/process.c
@@ -428,30 +428,15 @@ dump_elf_thread(elf_greg_t *dest, struct pt_regs *pt, struct thread_info *ti)
 int
 dump_elf_task(elf_greg_t *dest, struct task_struct *task)
 {
-        struct thread_info *ti;
-        struct pt_regs *pt;
-
-        ti = task->thread_info;
-        pt = (struct pt_regs *)((unsigned long)ti + 2*PAGE_SIZE) - 1;
-
-        dump_elf_thread(dest, pt, ti);
-
+        dump_elf_thread(dest, task_pt_regs(task), task_thread_info(task));
         return 1;
 }
 
 int
 dump_elf_task_fp(elf_fpreg_t *dest, struct task_struct *task)
 {
-        struct thread_info *ti;
-        struct pt_regs *pt;
-        struct switch_stack *sw;
-
-        ti = task->thread_info;
-        pt = (struct pt_regs *)((unsigned long)ti + 2*PAGE_SIZE) - 1;
-        sw = (struct switch_stack *)pt - 1;
-
+        struct switch_stack *sw = (struct switch_stack *)task_pt_regs(task) - 1;
         memcpy(dest, sw->fp, 32 * 8);
-
         return 1;
 }
 
diff --git a/arch/alpha/kernel/ptrace.c b/arch/alpha/kernel/ptrace.c
index 9069281313a3..0cd060598f9a 100644
--- a/arch/alpha/kernel/ptrace.c
+++ b/arch/alpha/kernel/ptrace.c
@@ -72,6 +72,13 @@ enum {
         REG_R0 = 0, REG_F0 = 32, REG_FPCR = 63, REG_PC = 64
 };
 
+#define PT_REG(reg) \
+  (PAGE_SIZE*2 - sizeof(struct pt_regs) + offsetof(struct pt_regs, reg))
+
+#define SW_REG(reg) \
+ (PAGE_SIZE*2 - sizeof(struct pt_regs) - sizeof(struct switch_stack) \
+  + offsetof(struct switch_stack, reg))
+
 static int regoff[] = {
         PT_REG(    r0), PT_REG(    r1), PT_REG(    r2), PT_REG(   r3),
         PT_REG(    r4), PT_REG(    r5), PT_REG(    r6), PT_REG(   r7),