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, 0 insertions, 22 deletions

diff --git a/arch/sparc/kernel/head_64.S b/arch/sparc/kernel/head_64.S
index 91bf4c7f79b9..f8f21050448b 100644
--- a/arch/sparc/kernel/head_64.S
+++ b/arch/sparc/kernel/head_64.S
@@ -641,28 +641,6 @@ tlb_fixup_done:
         /* Not reached... */
 
 1:
-        /* If we boot on a non-zero cpu, all of the per-cpu
-         * variable references we make before setting up the
-         * per-cpu areas will use a bogus offset.  Put a
-         * compensating factor into __per_cpu_base to handle
-         * this cleanly.
-         *
-         * What the per-cpu code calculates is:
-         *
-         *      __per_cpu_base + (cpu << __per_cpu_shift)
-         *
-         * These two variables are zero initially, so to
-         * make it all cancel out to zero we need to put
-         * "0 - (cpu << 0)" into __per_cpu_base so that the
-         * above formula evaluates to zero.
-         *
-         * We cannot even perform a printk() until this stuff
-         * is setup as that calls cpu_clock() which uses
-         * per-cpu variables.
-         */
-        sub     %g0, %o0, %o1
-        sethi   %hi(__per_cpu_base), %o2
-        stx     %o1, [%o2 + %lo(__per_cpu_base)]
 #else
         mov     0, %o0
 #endif