[SPARC64]: Always record actual PC when kernel profiling.

We used to play games reporting the callers
PC in certain functions such as the rwlock
and atomic_t routines.  If anything, somethin
like this should be optional, not by default.
Signed-off-by: David S. Miller <davem@redhat.com>

arch/sparc64/kernel/time.c

@@ -443,8 +443,7 @@ static inline void timer_check_rtc(void)
 
 void sparc64_do_profile(struct pt_regs *regs)
 {
-	unsigned long pc = regs->tpc;
-	unsigned long o7 = regs->u_regs[UREG_RETPC];
+	unsigned long pc;
 
 	profile_hook(regs);
 
@@ -454,32 +453,14 @@ void sparc64_do_profile(struct pt_regs *regs)
 	if (!prof_buffer)
 		return;
 
-	{
-		extern int rwlock_impl_begin, rwlock_impl_end;
-		extern int atomic_impl_begin, atomic_impl_end;
-		extern int __memcpy_begin, __memcpy_end;
-		extern int __bzero_begin, __bzero_end;
-		extern int __bitops_begin, __bitops_end;
-
-		if ((pc >= (unsigned long) &atomic_impl_begin &&
-		     pc < (unsigned long) &atomic_impl_end) ||
-		    (pc >= (unsigned long) &rwlock_impl_begin &&
-		     pc < (unsigned long) &rwlock_impl_end) ||
-		    (pc >= (unsigned long) &__memcpy_begin &&
-		     pc < (unsigned long) &__memcpy_end) ||
-		    (pc >= (unsigned long) &__bzero_begin &&
-		     pc < (unsigned long) &__bzero_end) ||
-		    (pc >= (unsigned long) &__bitops_begin &&
-		     pc < (unsigned long) &__bitops_end))
-			pc = o7;
-
-		pc -= (unsigned long) _stext;
-		pc >>= prof_shift;
-
-		if(pc >= prof_len)
-			pc = prof_len - 1;
-		atomic_inc((atomic_t *)&prof_buffer[pc]);
-	}
+	pc = regs->tpc;
+
+	pc -= (unsigned long) _stext;
+	pc >>= prof_shift;
+
+	if(pc >= prof_len)
+		pc = prof_len - 1;
+	atomic_inc((atomic_t *)&prof_buffer[pc]);
 }
 
 static irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs * regs)

arch/sparc64/lib/VISbzero.S

@@ -83,8 +83,6 @@
 	.text
 	.align		32
 #ifdef __KERNEL__
-	.globl		__bzero_begin
-__bzero_begin:
 	.globl		__bzero, __bzero_noasi
 __bzero_noasi:
 	rd		%asi, %g5
@@ -274,5 +272,3 @@ VISbzerofixup_zb:
 	ba,pt		%xcc, VISbzerofixup_ret0
 	 sub		%o1, %g2, %o0
 #endif
-	.globl		__bzero_end
-__bzero_end:

arch/sparc64/lib/VIScopy.S

@@ -303,9 +303,6 @@
 		.type			bcopy,@function
 
 #ifdef __KERNEL__
-		.globl			__memcpy_begin
-__memcpy_begin:
-
 memcpy_private:
 memcpy:		mov		ASI_P, asi_src			! IEU0	Group
 		brnz,pt		%o2, __memcpy_entry		! CTI
@@ -1055,9 +1052,6 @@ fpu_retl:
 	FPU_RETL
 
 #ifdef __KERNEL__
-	.globl		__memcpy_end
-__memcpy_end:
-
 		.section	.fixup
 		.align		4
 VIScopyfixup_reto2:

arch/sparc64/lib/atomic.S

@@ -9,10 +9,7 @@
 	.text
 	.align	64
 
-	.globl	atomic_impl_begin, atomic_impl_end
-
 	.globl	__atomic_add
-atomic_impl_begin:
 __atomic_add: /* %o0 = increment, %o1 = atomic_ptr */
 	lduw	[%o1], %g5
 	add	%g5, %o0, %g7
@@ -56,4 +53,3 @@ __atomic64_sub: /* %o0 = increment, %o1 = atomic_ptr */
 	retl
 	 sub	%g7, %o0, %o0
 
-atomic_impl_end:

arch/sparc64/lib/bitops.S

@@ -8,9 +8,6 @@
 
 	.text
 	.align	64
-	.globl	__bitops_begin
-__bitops_begin:
-
 	.globl	___test_and_set_bit
 ___test_and_set_bit:	/* %o0=nr, %o1=addr */
 	srlx	%o0, 6, %g1
@@ -105,6 +102,3 @@ ___test_and_clear_le_bit:	/* %o0=nr, %o1=addr */
 	 lduwa	[%o1] ASI_PL, %g7
 2:	retl
 	 membar	#StoreLoad | #StoreStore
-
-	.globl	__bitops_end
-__bitops_end:

arch/sparc64/lib/rwlock.S

@@ -7,12 +7,9 @@
 	.text
 	.align	64
 
-	.globl	rwlock_impl_begin, rwlock_impl_end
-
 	/* The non-contention read lock usage is 2 cache lines. */
 
 	.globl	__read_lock, __read_unlock
-rwlock_impl_begin:
 __read_lock: /* %o0 = lock_ptr */
 	ldsw		[%o0], %g5
 	brlz,pn		%g5, __read_wait_for_writer
@@ -85,5 +82,4 @@ __write_trylock_succeed:
 __write_trylock_fail:
 	retl
 	 mov		0, %o0
-rwlock_impl_end: