s390/dumpstack: merge all four stack tracers

[sfrench/cifs-2.6.git] / arch / s390 / oprofile / backtrace.c

diff --git a/arch/s390/oprofile/backtrace.c b/arch/s390/oprofile/backtrace.c
deleted file mode 100644 (file)
index 1884e17..0000000
--- a/arch/s390/oprofile/backtrace.c
+++ /dev/null
@@ -1,78 +0,0 @@
-/*
- * S390 Version
- *   Copyright IBM Corp. 2005
- *   Author(s): Andreas Krebbel <Andreas.Krebbel@de.ibm.com>
- */
-
-#include <linux/oprofile.h>
-
-#include <asm/processor.h> /* for struct stack_frame */
-
-static unsigned long
-__show_trace(unsigned int *depth, unsigned long sp,
-            unsigned long low, unsigned long high)
-{
-       struct stack_frame *sf;
-       struct pt_regs *regs;
-
-       while (*depth) {
-               if (sp < low || sp > high - sizeof(*sf))
-                       return sp;
-               sf = (struct stack_frame *) sp;
-               (*depth)--;
-               oprofile_add_trace(sf->gprs[8]);
-
-               /* Follow the backchain.  */
-               while (*depth) {
-                       low = sp;
-                       sp = sf->back_chain;
-                       if (!sp)
-                               break;
-                       if (sp <= low || sp > high - sizeof(*sf))
-                               return sp;
-                       sf = (struct stack_frame *) sp;
-                       (*depth)--;
-                       oprofile_add_trace(sf->gprs[8]);
-
-               }
-
-               if (*depth == 0)
-                       break;
-
-               /* Zero backchain detected, check for interrupt frame.  */
-               sp = (unsigned long) (sf + 1);
-               if (sp <= low || sp > high - sizeof(*regs))
-                       return sp;
-               regs = (struct pt_regs *) sp;
-               (*depth)--;
-               oprofile_add_trace(sf->gprs[8]);
-               low = sp;
-               sp = regs->gprs[15];
-       }
-       return sp;
-}
-
-void s390_backtrace(struct pt_regs * const regs, unsigned int depth)
-{
-       unsigned long head, frame_size;
-       struct stack_frame* head_sf;
-
-       if (user_mode(regs))
-               return;
-
-       frame_size = STACK_FRAME_OVERHEAD + sizeof(struct pt_regs);
-       head = regs->gprs[15];
-       head_sf = (struct stack_frame*)head;
-
-       if (!head_sf->back_chain)
-               return;
-
-       head = head_sf->back_chain;
-
-       head = __show_trace(&depth, head,
-                           S390_lowcore.async_stack + frame_size - ASYNC_SIZE,
-                           S390_lowcore.async_stack + frame_size);
-
-       __show_trace(&depth, head, S390_lowcore.thread_info,
-                    S390_lowcore.thread_info + THREAD_SIZE);
-}