sparc64: Store per-cpu offset in trap_block[]

Surprisingly this actually makes LOAD_PER_CPU_BASE() a little
more efficient.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 1 deletions

diff --git a/arch/sparc/kernel/traps_64.c b/arch/sparc/kernel/traps_64.c
index d809c4ebb48f..d073aabf65ed 100644
--- a/arch/sparc/kernel/traps_64.c
+++ b/arch/sparc/kernel/traps_64.c
@@ -2509,6 +2509,7 @@ void do_getpsr(struct pt_regs *regs)
 }
 
 struct trap_per_cpu trap_block[NR_CPUS];
+EXPORT_SYMBOL(trap_block);
 
 /* This can get invoked before sched_init() so play it super safe
  * and use hard_smp_processor_id().
@@ -2592,7 +2593,9 @@ void __init trap_init(void)
             (TRAP_PER_CPU_RESUM_QMASK !=
              offsetof(struct trap_per_cpu, resum_qmask)) ||
             (TRAP_PER_CPU_NONRESUM_QMASK !=
-             offsetof(struct trap_per_cpu, nonresum_qmask)))
+             offsetof(struct trap_per_cpu, nonresum_qmask)) ||
+            (TRAP_PER_CPU_PER_CPU_BASE !=
+             offsetof(struct trap_per_cpu, __per_cpu_base)))
                 trap_per_cpu_offsets_are_bolixed_dave();
 
         if ((TSB_CONFIG_TSB !=