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sparc64: Kill off old sys_perfctr system call and state.

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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>
This commit is contained in:
David S. Miller
2010-03-03 08:08:49 -08:00
parent 6c5ae5b278
commit c7d5a00507
12 changed files with 18 additions and 247 deletions
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23
arch/sparc/kernel/syscalls.S
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@@ -110,31 +110,12 @@ sys_clone:
.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