Ever since commit 88b0193d9418 ("perf/callchain: Force USER_DS when
invoking perf_callchain_user()") the caller does this for us.
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
---
arch/sparc/kernel/perf_event.c | 5 -----
1 file changed, 5 deletions(-)
diff --git a/arch/sparc/kernel/perf_event.c b/arch/sparc/kernel/perf_event.c
index 67b3e6b..47c8713 100644
--- a/arch/sparc/kernel/perf_event.c
+++ b/arch/sparc/kernel/perf_event.c
@@ -1849,16 +1849,12 @@ perf_callchain_user(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs
{
u64 saved_fault_address = current_thread_info()->fault_address;
u8 saved_fault_code = get_thread_fault_code();
- 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();
@@ -1870,7 +1866,6 @@ perf_callchain_user(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs
pagefault_enable();
- set_fs(old_fs);
set_thread_fault_code(saved_fault_code);
current_thread_info()->fault_address = saved_fault_address;
}
--
2.1.2.532.g19b5d50
