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Diffstat (limited to 'arch/sparc/kernel/perf_event.c')
-rw-r--r--arch/sparc/kernel/perf_event.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/sparc/kernel/perf_event.c b/arch/sparc/kernel/perf_event.c
index 3091267c5cc3..b1144d6acffe 100644
--- a/arch/sparc/kernel/perf_event.c
+++ b/arch/sparc/kernel/perf_event.c
@@ -1828,11 +1828,16 @@ static void perf_callchain_user_32(struct perf_callchain_entry *entry,
void
perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs)
{
+ mm_segment_t old_fs;
+
perf_callchain_store(entry, regs->tpc);
if (!current->mm)
return;
+ old_fs = get_fs();
+ set_fs(USER_DS);
+
flushw_user();
pagefault_disable();
@@ -1843,4 +1848,6 @@ perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs)
perf_callchain_user_64(entry, regs);
pagefault_enable();
+
+ set_fs(old_fs);
}