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>

1 files changed, 0 insertions, 104 deletions

diff --git a/arch/sparc/kernel/sys_sparc_64.c b/arch/sparc/kernel/sys_sparc_64.c
index d77f54316948..cb1bef6f14b7 100644
--- a/arch/sparc/kernel/sys_sparc_64.c
+++ b/arch/sparc/kernel/sys_sparc_64.c
@@ -27,7 +27,6 @@
 
 #include <asm/uaccess.h>
 #include <asm/utrap.h>
-#include <asm/perfctr.h>
 #include <asm/unistd.h>
 
 #include "entry.h"
@@ -766,109 +765,6 @@ SYSCALL_DEFINE5(rt_sigaction, int, sig, const struct sigaction __user *, act,
 	return ret;
 }
 
-/* Invoked by rtrap code to update performance counters in
- * user space.
- */
-asmlinkage void update_perfctrs(void)
-{
-	unsigned long pic, tmp;
-
-	read_pic(pic);
-	tmp = (current_thread_info()->kernel_cntd0 += (unsigned int)pic);
-	__put_user(tmp, current_thread_info()->user_cntd0);
-	tmp = (current_thread_info()->kernel_cntd1 += (pic >> 32));
-	__put_user(tmp, current_thread_info()->user_cntd1);
-	reset_pic();
-}
-
-SYSCALL_DEFINE4(perfctr, int, opcode, unsigned long, arg0,
-		unsigned long, arg1, unsigned long, arg2)
-{
-	int err = 0;
-
-	switch(opcode) {
-	case PERFCTR_ON:
-		current_thread_info()->pcr_reg = arg2;
-		current_thread_info()->user_cntd0 = (u64 __user *) arg0;
-		current_thread_info()->user_cntd1 = (u64 __user *) arg1;
-		current_thread_info()->kernel_cntd0 =
-			current_thread_info()->kernel_cntd1 = 0;
-		write_pcr(arg2);
-		reset_pic();
-		set_thread_flag(TIF_PERFCTR);
-		break;
-
-	case PERFCTR_OFF:
-		err = -EINVAL;
-		if (test_thread_flag(TIF_PERFCTR)) {
-			current_thread_info()->user_cntd0 =
-				current_thread_info()->user_cntd1 = NULL;
-			current_thread_info()->pcr_reg = 0;
-			write_pcr(0);
-			clear_thread_flag(TIF_PERFCTR);
-			err = 0;
-		}
-		break;
-
-	case PERFCTR_READ: {
-		unsigned long pic, tmp;
-
-		if (!test_thread_flag(TIF_PERFCTR)) {
-			err = -EINVAL;
-			break;
-		}
-		read_pic(pic);
-		tmp = (current_thread_info()->kernel_cntd0 += (unsigned int)pic);
-		err |= __put_user(tmp, current_thread_info()->user_cntd0);
-		tmp = (current_thread_info()->kernel_cntd1 += (pic >> 32));
-		err |= __put_user(tmp, current_thread_info()->user_cntd1);
-		reset_pic();
-		break;
-	}
-
-	case PERFCTR_CLRPIC:
-		if (!test_thread_flag(TIF_PERFCTR)) {
-			err = -EINVAL;
-			break;
-		}
-		current_thread_info()->kernel_cntd0 =
-			current_thread_info()->kernel_cntd1 = 0;
-		reset_pic();
-		break;
-
-	case PERFCTR_SETPCR: {
-		u64 __user *user_pcr = (u64 __user *)arg0;
-
-		if (!test_thread_flag(TIF_PERFCTR)) {
-			err = -EINVAL;
-			break;
-		}
-		err |= __get_user(current_thread_info()->pcr_reg, user_pcr);
-		write_pcr(current_thread_info()->pcr_reg);
-		current_thread_info()->kernel_cntd0 =
-			current_thread_info()->kernel_cntd1 = 0;
-		reset_pic();
-		break;
-	}
-
-	case PERFCTR_GETPCR: {
-		u64 __user *user_pcr = (u64 __user *)arg0;
-
-		if (!test_thread_flag(TIF_PERFCTR)) {
-			err = -EINVAL;
-			break;
-		}
-		err |= __put_user(current_thread_info()->pcr_reg, user_pcr);
-		break;
-	}
-
-	default:
-		err = -EINVAL;
-		break;
-	};
-	return err;
-}
-
 /*
  * Do a system call from kernel instead of calling sys_execve so we
  * end up with proper pt_regs.