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>
diff --git a/arch/sparc/kernel/entry.h b/arch/sparc/kernel/entry.h
index 51742df..cc3c5cb 100644
--- a/arch/sparc/kernel/entry.h
+++ b/arch/sparc/kernel/entry.h
@@ -63,8 +63,8 @@
unsigned int addr;
unsigned int insns[3];
};
-extern struct pause_patch_entry __pause_patch,
- __pause_patch_end;
+extern struct pause_patch_entry __pause_3insn_patch,
+ __pause_3insn_patch_end;
extern void __init per_cpu_patch(void);
extern void sun4v_patch_1insn_range(struct sun4v_1insn_patch_entry *,
diff --git a/arch/sparc/kernel/setup_64.c b/arch/sparc/kernel/setup_64.c
index b45cff4..0eaf005 100644
--- a/arch/sparc/kernel/setup_64.c
+++ b/arch/sparc/kernel/setup_64.c
@@ -320,8 +320,8 @@
{
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++) {
diff --git a/arch/sparc/kernel/vmlinux.lds.S b/arch/sparc/kernel/vmlinux.lds.S
index 847f9f7..0bacceb 100644
--- a/arch/sparc/kernel/vmlinux.lds.S
+++ b/arch/sparc/kernel/vmlinux.lds.S
@@ -132,10 +132,10 @@
*(.popc_6insn_patch)
__popc_6insn_patch_end = .;
}
- .pause_patch : {
- __pause_patch = .;
- *(.pause_patch)
- __pause_patch_end = .;
+ .pause_3insn_patch : {
+ __pause_3insn_patch = .;
+ *(.pause_3insn_patch)
+ __pause_3insn_patch_end = .;
}
PERCPU_SECTION(SMP_CACHE_BYTES)