sparc64: Kill off old sys_perfctr system call and state.
People should be using the perf events interfaces, and
the way these system call facilities used the %pcr conflicts
with the usage of the NMI watchdog and perf events.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/kernel/syscalls.S b/arch/sparc/kernel/syscalls.S
index dc4a458..1d7e274 100644
--- a/arch/sparc/kernel/syscalls.S
+++ b/arch/sparc/kernel/syscalls.S
@@ -110,31 +110,12 @@
.globl ret_from_syscall
ret_from_syscall:
- /* Clear current_thread_info()->new_child, and
- * check performance counter stuff too.
- */
+ /* Clear current_thread_info()->new_child. */
stb %g0, [%g6 + TI_NEW_CHILD]
ldx [%g6 + TI_FLAGS], %l0
call schedule_tail
mov %g7, %o0
- andcc %l0, _TIF_PERFCTR, %g0
- be,pt %icc, 1f
- nop
- ldx [%g6 + TI_PCR], %o7
- wr %g0, %o7, %pcr
-
- /* Blackbird errata workaround. See commentary in
- * smp.c:smp_percpu_timer_interrupt() for more
- * information.
- */
- ba,pt %xcc, 99f
- nop
-
- .align 64
-99: wr %g0, %g0, %pic
- rd %pic, %g0
-
-1: ba,pt %xcc, ret_sys_call
+ ba,pt %xcc, ret_sys_call
ldx [%sp + PTREGS_OFF + PT_V9_I0], %o0
.globl sparc_exit