1 files changed, 0 insertions, 131 deletions
diff --git a/arch/ia64/oprofile/backtrace.c b/arch/ia64/oprofile/backtrace.c
deleted file mode 100644
index 6a219a946050..000000000000
--- a/arch/ia64/oprofile/backtrace.c
+++ /dev/null
@@ -1,131 +0,0 @@
-/**
- * @file backtrace.c
- *
- * @remark Copyright 2004 Silicon Graphics Inc.  All Rights Reserved.
- * @remark Read the file COPYING
- *
- * @author Greg Banks <gnb@melbourne.sgi.com>
- * @author Keith Owens <kaos@melbourne.sgi.com>
- * Based on work done for the ia64 port of the SGI kernprof patch, which is
- *    Copyright (c) 2003-2004 Silicon Graphics Inc.  All Rights Reserved.
- */
-
-#include <linux/oprofile.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <asm/ptrace.h>
-
-/*
- * For IA64 we need to perform a complex little dance to get both
- * the struct pt_regs and a synthetic struct switch_stack in place
- * to allow the unwind code to work.  This dance requires our unwind
- * using code to be called from a function called from unw_init_running().
- * There we only get a single void* data pointer, so use this struct
- * to hold all the data we need during the unwind.
- */
-typedef struct
-{
-	unsigned int depth;
-	struct pt_regs *regs;
-	struct unw_frame_info frame;
-	unsigned long *prev_pfs_loc;	/* state for WAR for old spinlock ool code */
-} ia64_backtrace_t;
-
-/* Returns non-zero if the PC is in the Interrupt Vector Table */
-static __inline__ int in_ivt_code(unsigned long pc)
-{
-	extern char ia64_ivt[];
-	return (pc >= (u_long)ia64_ivt && pc < (u_long)ia64_ivt+32768);
-}
-
-/*
- * Unwind to next stack frame.
- */
-static __inline__ int next_frame(ia64_backtrace_t *bt)
-{
-	/*
-	 * Avoid unsightly console message from unw_unwind() when attempting
-	 * to unwind through the Interrupt Vector Table which has no unwind
-	 * information.
-	 */
-	if (in_ivt_code(bt->frame.ip))
-		return 0;
-
-	/*
-	 * WAR for spinlock contention from leaf functions.  ia64_spinlock_contention_pre3_4
-	 * has ar.pfs == r0.  Leaf functions do not modify ar.pfs so ar.pfs remains
-	 * as 0, stopping the backtrace.  Record the previous ar.pfs when the current
-	 * IP is in ia64_spinlock_contention_pre3_4 then unwind, if pfs_loc has not changed
-	 * after unwind then use pt_regs.ar_pfs which is where the real ar.pfs is for
-	 * leaf functions.
-	 */
-	if (bt->prev_pfs_loc && bt->regs && bt->frame.pfs_loc == bt->prev_pfs_loc)
-		bt->frame.pfs_loc = &bt->regs->ar_pfs;
-	bt->prev_pfs_loc = NULL;
-
-	return unw_unwind(&bt->frame) == 0;
-}
-
-
-static void do_ia64_backtrace(struct unw_frame_info *info, void *vdata)
-{
-	ia64_backtrace_t *bt = vdata;
-	struct switch_stack *sw;
-	int count = 0;
-	u_long pc, sp;
-
-	sw = (struct switch_stack *)(info+1);
-	/* padding from unw_init_running */
-	sw = (struct switch_stack *)(((unsigned long)sw + 15) & ~15);
-
-	unw_init_frame_info(&bt->frame, current, sw);
-
-	/* skip over interrupt frame and oprofile calls */
-	do {
-		unw_get_sp(&bt->frame, &sp);
-		if (sp >= (u_long)bt->regs)
-			break;
-		if (!next_frame(bt))
-			return;
-	} while (count++ < 200);
-
-	/* finally, grab the actual sample */
-	while (bt->depth-- && next_frame(bt)) {
-		unw_get_ip(&bt->frame, &pc);
-		oprofile_add_trace(pc);
-		if (unw_is_intr_frame(&bt->frame)) {
-			/*
-			 * Interrupt received on kernel stack; this can
-			 * happen when timer interrupt fires while processing
-			 * a softirq from the tail end of a hardware interrupt
-			 * which interrupted a system call.  Don't laugh, it
-			 * happens!  Splice the backtrace into two parts to
-			 * avoid spurious cycles in the gprof output.
-			 */
-			/* TODO: split rather than drop the 2nd half */
-			break;
-		}
-	}
-}
-
-void
-ia64_backtrace(struct pt_regs * const regs, unsigned int depth)
-{
-	ia64_backtrace_t bt;
-	unsigned long flags;
-
-	/*
-	 * On IA64 there is little hope of getting backtraces from
-	 * user space programs -- the problems of getting the unwind
-	 * information from arbitrary user programs are extreme.
-	 */
-	if (user_mode(regs))
-		return;
-
-	bt.depth = depth;
-	bt.regs = regs;
-	bt.prev_pfs_loc = NULL;
-	local_irq_save(flags);
-	unw_init_running(do_ia64_backtrace, &bt);
-	local_irq_restore(flags);
-}