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

* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  tracing: Fix null pointer deref with SEND_SIG_FORCED
  perf: Fix signed comparison in perf_adjust_period()
  powerpc/oprofile: fix potential buffer overrun in op_model_cell.c
  perf symbols: Set the DSO long name when using symbol_conf.vmlinux_name

4 files changed, 13 insertions, 5 deletions

diff --git a/arch/powerpc/oprofile/op_model_cell.c b/arch/powerpc/oprofile/op_model_cell.c
index 2c9e52267292..7fd90d02d8c6 100644
--- a/arch/powerpc/oprofile/op_model_cell.c
+++ b/arch/powerpc/oprofile/op_model_cell.c
@@ -1077,7 +1077,7 @@ static int calculate_lfsr(int n)
                 index = ENTRIES-1;
 
         /* make sure index is valid */
-        if ((index > ENTRIES) || (index < 0))
+        if ((index >= ENTRIES) || (index < 0))
                 index = ENTRIES-1;
 
         return initial_lfsr[index];
diff --git a/include/trace/events/signal.h b/include/trace/events/signal.h
index 814566c99d29..17df43464df0 100644
--- a/include/trace/events/signal.h
+++ b/include/trace/events/signal.h
@@ -10,7 +10,8 @@
 
 #define TP_STORE_SIGINFO(__entry, info)                         \
         do {                                                    \
-                if (info == SEND_SIG_NOINFO) {                  \
+                if (info == SEND_SIG_NOINFO ||                  \
+                    info == SEND_SIG_FORCED) {                  \
                         __entry->errno  = 0;                    \
                         __entry->code   = SI_USER;              \
                 } else if (info == SEND_SIG_PRIV) {             \
diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 31d6afe92594..ff86c558af4c 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -1507,6 +1507,9 @@ do {					\
                 divisor = nsec * frequency;
         }
 
+        if (!divisor)
+                return dividend;
+
         return div64_u64(dividend, divisor);
 }
 
@@ -1529,7 +1532,7 @@ static int perf_event_start(struct perf_event *event)
 static void perf_adjust_period(struct perf_event *event, u64 nsec, u64 count)
 {
         struct hw_perf_event *hwc = &event->hw;
-        u64 period, sample_period;
+        s64 period, sample_period;
         s64 delta;
 
         period = perf_calculate_period(event, nsec, count);
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 7fd6b151feb5..b63e5713849f 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1745,7 +1745,12 @@ static int dso__load_kernel_sym(struct dso *self, struct map *map,
         if (symbol_conf.vmlinux_name != NULL) {
                 err = dso__load_vmlinux(self, map,
                                         symbol_conf.vmlinux_name, filter);
-                goto out_try_fixup;
+                if (err > 0) {
+                        dso__set_long_name(self,
+                                           strdup(symbol_conf.vmlinux_name));
+                        goto out_fixup;
+                }
+                return err;
         }
 
         if (vmlinux_path != NULL) {
@@ -1806,7 +1811,6 @@ do_kallsyms:
                 pr_debug("Using %s for symbols\n", kallsyms_filename);
         free(kallsyms_allocated_filename);
 
-out_try_fixup:
         if (err > 0) {
 out_fixup:
                 if (kallsyms_filename != NULL)