sparc64: Remvoe set_fs() from perf_callchain_user().
authorDavid S. Miller <davem@davemloft.net>
Tue, 30 Oct 2018 05:17:12 +0000 (22:17 -0700)
committerDavid S. Miller <davem@davemloft.net>
Tue, 30 Oct 2018 05:17:12 +0000 (22:17 -0700)
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@davemloft.net>
arch/sparc/kernel/perf_event.c

index 67b3e6b3ce5d7cf8b417d361c5bbaadce92cc1e0..47c871394ccb1602d59bca5a3459a7e088df98e0 100644 (file)
@@ -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;
 }