perf/x86: Save a few bytes in 'struct x86_pmu'

All these are basically boolean flags, use a bitfield to save a few
bytes.

Suggested-by: Borislav Petkov <bp@amd64.org>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-vsevd5g8lhcn129n3s7trl7r@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h
index 3f5c669..a15df4b 100644 (file)
--- a/arch/x86/kernel/cpu/perf_event.h
+++ b/arch/x86/kernel/cpu/perf_event.h
@@ -374,8 +374,11 @@ struct x86_pmu {
        /*
         * Intel DebugStore bits
         */
-       int             bts, pebs;
-       int             bts_active, pebs_active, pebs_broken;
+       int             bts             :1,
+                       bts_active      :1,
+                       pebs            :1,
+                       pebs_active     :1,
+                       pebs_broken     :1;
        int             pebs_record_size;
        void            (*drain_pebs)(struct pt_regs *regs);
        struct event_constraint *pebs_constraints;