summaryrefslogtreecommitdiff
path: root/arch/sparc/kernel/sys_sparc_64.c
diff options
context:
space:
mode:
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/sys_sparc_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/sys_sparc_64.c')
-rw-r--r--arch/sparc/kernel/sys_sparc_64.c104
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.