Revert "x86/UV: Add uvtrace support"

This reverts commit 8eba18428ac926f436064ac281e76d36d51bd631.

uv_trace() is not used by anything, nor is uv_trace_nmi_func, nor
uv_trace_func.

That's not how we do instrumentation code in the kernel: we add
tracepoints, printk()s, etc. so that everyone not just those with
magic kernel modules can debug a system.

So remove this unused (and misguied) piece of code.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Mike Travis <travis@sgi.com>
Cc: Dimitri Sivanich <sivanich@sgi.com>
Cc: Hedi Berriche <hedi@sgi.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Jason Wessel <jason.wessel@windriver.com>
Link: http://lkml.kernel.org/n/tip-tumfBffmr4jmnt8Gyxanoblg@git.kernel.org

2 files changed, 1 insertions, 20 deletions

diff --git a/arch/x86/include/asm/uv/uv.h b/arch/x86/include/asm/uv/uv.h
index 8b1283daa332..6b964a0b86d1 100644
--- a/arch/x86/include/asm/uv/uv.h
+++ b/arch/x86/include/asm/uv/uv.h
@@ -14,13 +14,6 @@ extern void uv_cpu_init(void);
 extern void uv_nmi_init(void);
 extern void uv_register_nmi_notifier(void);
 extern void uv_system_init(void);
-extern void (*uv_trace_nmi_func)(unsigned int reason, struct pt_regs *regs);
-extern void (*uv_trace_func)(const char *f, const int l, const char *fmt, ...);
-#define uv_trace(fmt, ...)                                              \
-do {                                                                    \
-        if (unlikely(uv_trace_func))                                    \
-                (uv_trace_func)(__func__, __LINE__, fmt, ##__VA_ARGS__);\
-} while (0)
 extern const struct cpumask *uv_flush_tlb_others(const struct cpumask *cpumask,
                                                  struct mm_struct *mm,
                                                  unsigned long start,
@@ -33,7 +26,6 @@ static inline enum uv_system_type get_uv_system_type(void) { return UV_NONE; }
 static inline int is_uv_system(void)    { return 0; }
 static inline void uv_cpu_init(void)    { }
 static inline void uv_system_init(void) { }
-static inline void uv_trace(void *fmt, ...)     { }
 static inline void uv_register_nmi_notifier(void) { }
 static inline const struct cpumask *
 uv_flush_tlb_others(const struct cpumask *cpumask, struct mm_struct *mm,
diff --git a/arch/x86/platform/uv/uv_nmi.c b/arch/x86/platform/uv/uv_nmi.c
index 9b8ac60ad8db..2e863ad4a772 100644
--- a/arch/x86/platform/uv/uv_nmi.c
+++ b/arch/x86/platform/uv/uv_nmi.c
@@ -1,5 +1,5 @@
 /*
- * SGI NMI/TRACE support routines
+ * SGI NMI support routines
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -39,13 +39,6 @@
 #include <asm/uv/uv_hub.h>
 #include <asm/uv/uv_mmrs.h>
 
-void (*uv_trace_func)(const char *f, const int l, const char *fmt, ...);
-EXPORT_SYMBOL(uv_trace_func);
-
-void (*uv_trace_nmi_func)(unsigned int reason, struct pt_regs *regs);
-EXPORT_SYMBOL(uv_trace_nmi_func);
-
-
 /*
  * UV handler for NMI
  *
@@ -599,10 +592,6 @@ int uv_handle_nmi(unsigned int reason, struct pt_regs *regs)
                 return NMI_DONE;
         }
 
-        /* Call possible NMI trace function */
-        if (unlikely(uv_trace_nmi_func))
-                (uv_trace_nmi_func)(reason, regs);
-
         /* Indicate we are the first CPU into the NMI handler */
         master = (atomic_read(&uv_nmi_cpu) == cpu);