sparc64: Improvde documentation and readability of atomic backoff code.

Document what's going on in asm/backoff.h with a large and descriptive
comment.  Refer to it above the cpu_relax() definition in
asm/processor_64.h

Rename the pause patching section to have "3insn" in it's name like
the other patching sections do.

Based upon feedback from Sam Ravnborg.

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

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/sparc/kernel/setup_64.c b/arch/sparc/kernel/setup_64.c
index b45cff408de3..0eaf0059aaef 100644
--- a/arch/sparc/kernel/setup_64.c
+++ b/arch/sparc/kernel/setup_64.c
@@ -320,8 +320,8 @@ static void __init pause_patch(void)
 {
         struct pause_patch_entry *p;
 
-        p = &__pause_patch;
-        while (p < &__pause_patch_end) {
+        p = &__pause_3insn_patch;
+        while (p < &__pause_3insn_patch_end) {
                 unsigned long i, addr = p->addr;
 
                 for (i = 0; i < 3; i++) {