Merge branch 'oprofile-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'oprofile-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  oprofile/x86: fix msr access to reserved counters
  oprofile/x86: use kzalloc() instead of kmalloc()
  oprofile/x86: fix perfctr nmi reservation for mulitplexing
  oprofile/x86: add comment to counter-in-use warning
  oprofile/x86: warn user if a counter is already active
  oprofile/x86: implement randomization for IBS periodic op counter
  oprofile/x86: implement lsfr pseudo-random number generator for IBS
  oprofile/x86: implement IBS cpuid feature detection
  oprofile/x86: remove node check in AMD IBS initialization
  oprofile/x86: remove OPROFILE_IBS config option
  oprofile: remove EXPERIMENTAL from the config option description
  oprofile: remove tracing build dependency

1 files changed, 9 insertions, 8 deletions

diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c
index 3347f696edc7..2c505ee71014 100644
--- a/arch/x86/oprofile/nmi_int.c
+++ b/arch/x86/oprofile/nmi_int.c
@@ -159,7 +159,7 @@ static int nmi_setup_mux(void)
 
         for_each_possible_cpu(i) {
                 per_cpu(cpu_msrs, i).multiplex =
-                        kmalloc(multiplex_size, GFP_KERNEL);
+                        kzalloc(multiplex_size, GFP_KERNEL);
                 if (!per_cpu(cpu_msrs, i).multiplex)
                         return 0;
         }
@@ -179,7 +179,6 @@ static void nmi_cpu_setup_mux(int cpu, struct op_msrs const * const msrs)
                 if (counter_config[i].enabled) {
                         multiplex[i].saved = -(u64)counter_config[i].count;
                 } else {
-                        multiplex[i].addr  = 0;
                         multiplex[i].saved = 0;
                 }
         }
@@ -189,25 +188,27 @@ static void nmi_cpu_setup_mux(int cpu, struct op_msrs const * const msrs)
 
 static void nmi_cpu_save_mpx_registers(struct op_msrs *msrs)
 {
+        struct op_msr *counters = msrs->counters;
         struct op_msr *multiplex = msrs->multiplex;
         int i;
 
         for (i = 0; i < model->num_counters; ++i) {
                 int virt = op_x86_phys_to_virt(i);
-                if (multiplex[virt].addr)
-                        rdmsrl(multiplex[virt].addr, multiplex[virt].saved);
+                if (counters[i].addr)
+                        rdmsrl(counters[i].addr, multiplex[virt].saved);
         }
 }
 
 static void nmi_cpu_restore_mpx_registers(struct op_msrs *msrs)
 {
+        struct op_msr *counters = msrs->counters;
         struct op_msr *multiplex = msrs->multiplex;
         int i;
 
         for (i = 0; i < model->num_counters; ++i) {
                 int virt = op_x86_phys_to_virt(i);
-                if (multiplex[virt].addr)
-                        wrmsrl(multiplex[virt].addr, multiplex[virt].saved);
+                if (counters[i].addr)
+                        wrmsrl(counters[i].addr, multiplex[virt].saved);
         }
 }
 
@@ -303,11 +304,11 @@ static int allocate_msrs(void)
 
         int i;
         for_each_possible_cpu(i) {
-                per_cpu(cpu_msrs, i).counters = kmalloc(counters_size,
+                per_cpu(cpu_msrs, i).counters = kzalloc(counters_size,
                                                         GFP_KERNEL);
                 if (!per_cpu(cpu_msrs, i).counters)
                         return 0;
-                per_cpu(cpu_msrs, i).controls = kmalloc(controls_size,
+                per_cpu(cpu_msrs, i).controls = kzalloc(controls_size,
                                                         GFP_KERNEL);
                 if (!per_cpu(cpu_msrs, i).controls)
                         return 0;