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>

3 files changed, 10 insertions, 34 deletions

diff --git a/arch/sparc/include/asm/perfctr.h b/arch/sparc/include/asm/perfctr.h
index 836873002b75..8d8720a8770d 100644
--- a/arch/sparc/include/asm/perfctr.h
+++ b/arch/sparc/include/asm/perfctr.h
@@ -10,8 +10,8 @@
  * from enumeration below.  The meaning of further arguments
  * are determined by the operation code.
  *
- * int sys_perfctr(int opcode, unsigned long arg0,
- *                 unsigned long arg1, unsigned long arg2)
+ * NOTE: This system call is no longer provided, use the perf_events
+ *       infrastructure.
  *
  * Pointers which are passed by the user are pointers to 64-bit
  * integers.
diff --git a/arch/sparc/include/asm/system_64.h b/arch/sparc/include/asm/system_64.h
index d47a98e66972..d24cfe16afc1 100644
--- a/arch/sparc/include/asm/system_64.h
+++ b/arch/sparc/include/asm/system_64.h
@@ -143,15 +143,7 @@ do {						\
          * and 2 stores in this critical code path.  -DaveM
          */
 #define switch_to(prev, next, last)                                     \
-do {    if (test_thread_flag(TIF_PERFCTR)) {                            \
-                unsigned long __tmp;                                    \
-                read_pcr(__tmp);                                        \
-                current_thread_info()->pcr_reg = __tmp;                 \
-                read_pic(__tmp);                                        \
-                current_thread_info()->kernel_cntd0 += (unsigned int)(__tmp);\
-                current_thread_info()->kernel_cntd1 += ((__tmp) >> 32); \
-        }                                                               \
-        flush_tlb_pending();                                            \
+do {    flush_tlb_pending();                                            \
         save_and_clear_fpu();                                           \
         /* If you are tempted to conditionalize the following */        \
         /* so that ASI is only written if it changes, think again. */   \
@@ -197,11 +189,6 @@ do {	if (test_thread_flag(TIF_PERFCTR)) {				\
                 "l1", "l2", "l3", "l4", "l5", "l6", "l7",               \
           "i0", "i1", "i2", "i3", "i4", "i5",                           \
           "o0", "o1", "o2", "o3", "o4", "o5",       "o7");              \
-        /* If you fuck with this, update ret_from_syscall code too. */  \
-        if (test_thread_flag(TIF_PERFCTR)) {                            \
-                write_pcr(current_thread_info()->pcr_reg);              \
-                reset_pic();                                            \
-        }                                                               \
 } while(0)
 
 static inline unsigned long xchg32(__volatile__ unsigned int *m, unsigned int val)
diff --git a/arch/sparc/include/asm/thread_info_64.h b/arch/sparc/include/asm/thread_info_64.h
index 39be9f256e5a..9e2d9447f2ad 100644
--- a/arch/sparc/include/asm/thread_info_64.h
+++ b/arch/sparc/include/asm/thread_info_64.h
@@ -58,11 +58,6 @@ struct thread_info {
         unsigned long           gsr[7];
         unsigned long           xfsr[7];
 
-        __u64                   __user *user_cntd0;
-        __u64                   __user *user_cntd1;
-        __u64                   kernel_cntd0, kernel_cntd1;
-        __u64                   pcr_reg;
-
         struct restart_block    restart_block;
 
         struct pt_regs          *kern_una_regs;
@@ -96,15 +91,10 @@ struct thread_info {
 #define TI_RWIN_SPTRS   0x000003c8
 #define TI_GSR          0x00000400
 #define TI_XFSR         0x00000438
-#define TI_USER_CNTD0   0x00000470
-#define TI_USER_CNTD1   0x00000478
-#define TI_KERN_CNTD0   0x00000480
-#define TI_KERN_CNTD1   0x00000488
-#define TI_PCR          0x00000490
-#define TI_RESTART_BLOCK 0x00000498
-#define TI_KUNA_REGS    0x000004c8
-#define TI_KUNA_INSN    0x000004d0
-#define TI_FPREGS       0x00000500
+#define TI_RESTART_BLOCK 0x00000470
+#define TI_KUNA_REGS    0x000004a0
+#define TI_KUNA_INSN    0x000004a8
+#define TI_FPREGS       0x000004c0
 
 /* We embed this in the uppermost byte of thread_info->flags */
 #define FAULT_CODE_WRITE        0x01    /* Write access, implies D-TLB     */
@@ -199,7 +189,7 @@ register struct thread_info *current_thread_info_reg asm("g6");
  *
  * On trap return we need to test several values:
  *
- * user:        need_resched, notify_resume, sigpending, wsaved, perfctr
+ * user:        need_resched, notify_resume, sigpending, wsaved
  * kernel:      fpdepth
  *
  * So to check for work in the kernel case we simply load the fpdepth
@@ -220,7 +210,7 @@ register struct thread_info *current_thread_info_reg asm("g6");
 #define TIF_NOTIFY_RESUME       1       /* callback before returning to user */
 #define TIF_SIGPENDING          2       /* signal pending */
 #define TIF_NEED_RESCHED        3       /* rescheduling necessary */
-#define TIF_PERFCTR             4       /* performance counters active */
+/* flag bit 4 is available */
 #define TIF_UNALIGNED           5       /* allowed to do unaligned accesses */
 /* flag bit 6 is available */
 #define TIF_32BIT               7       /* 32-bit binary */
@@ -241,7 +231,6 @@ register struct thread_info *current_thread_info_reg asm("g6");
 #define _TIF_NOTIFY_RESUME      (1<<TIF_NOTIFY_RESUME)
 #define _TIF_SIGPENDING         (1<<TIF_SIGPENDING)
 #define _TIF_NEED_RESCHED       (1<<TIF_NEED_RESCHED)
-#define _TIF_PERFCTR            (1<<TIF_PERFCTR)
 #define _TIF_UNALIGNED          (1<<TIF_UNALIGNED)
 #define _TIF_32BIT              (1<<TIF_32BIT)
 #define _TIF_SECCOMP            (1<<TIF_SECCOMP)
@@ -252,7 +241,7 @@ register struct thread_info *current_thread_info_reg asm("g6");
 
 #define _TIF_USER_WORK_MASK     ((0xff << TI_FLAG_WSAVED_SHIFT) | \
                                  _TIF_DO_NOTIFY_RESUME_MASK | \
-                                 _TIF_NEED_RESCHED | _TIF_PERFCTR)
+                                 _TIF_NEED_RESCHED)
 #define _TIF_DO_NOTIFY_RESUME_MASK      (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING)
 
 /*