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authorDavid S. Miller <davem@davemloft.net>2010-03-03 08:08:49 -0800
committerDavid S. Miller <davem@davemloft.net>2010-03-03 08:08:49 -0800
commitc7d5a0050773e98d1094eaa9f2a1a793fafac300 (patch)
tree9836ff13aabf0990d5f235f24c90b5ef5cd8ae71 /arch/sparc/kernel/process_64.c
parent6c5ae5b278e29c1a23fd562e1a5276c2e2ea1738 (diff)
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>
Diffstat (limited to 'arch/sparc/kernel/process_64.c')
-rw-r--r--arch/sparc/kernel/process_64.c23
1 files changed, 0 insertions, 23 deletions
diff --git a/arch/sparc/kernel/process_64.c b/arch/sparc/kernel/process_64.c
index cb70476bd8f5..a5cf3864b31f 100644
--- a/arch/sparc/kernel/process_64.c
+++ b/arch/sparc/kernel/process_64.c
@@ -352,12 +352,6 @@ void exit_thread(void)
else
t->utraps[0]--;
}
-
- if (test_and_clear_thread_flag(TIF_PERFCTR)) {
- t->user_cntd0 = t->user_cntd1 = NULL;
- t->pcr_reg = 0;
- write_pcr(0);
- }
}
void flush_thread(void)
@@ -371,13 +365,6 @@ void flush_thread(void)
set_thread_wsaved(0);
- /* Turn off performance counters if on. */
- if (test_and_clear_thread_flag(TIF_PERFCTR)) {
- t->user_cntd0 = t->user_cntd1 = NULL;
- t->pcr_reg = 0;
- write_pcr(0);
- }
-
/* Clear FPU register state. */
t->fpsaved[0] = 0;
@@ -591,16 +578,6 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
t->kregs->u_regs[UREG_FP] =
((unsigned long) child_sf) - STACK_BIAS;
- /* Special case, if we are spawning a kernel thread from
- * a userspace task (usermode helper, NFS or similar), we
- * must disable performance counters in the child because
- * the address space and protection realm are changing.
- */
- if (t->flags & _TIF_PERFCTR) {
- t->user_cntd0 = t->user_cntd1 = NULL;
- t->pcr_reg = 0;
- t->flags &= ~_TIF_PERFCTR;
- }
t->flags |= ((long)ASI_P << TI_FLAG_CURRENT_DS_SHIFT);
t->kregs->u_regs[UREG_G6] = (unsigned long) t;
t->kregs->u_regs[UREG_G4] = (unsigned long) t->task;