For the forthcoming MIPS jump label support,
arch_jump_label_text_poke_early() is unneeded as the MIPS NOP
instruction is already optimal.
Supply a default implementation that does nothing. Flag x86 and SPARC
as having arch_jump_label_text_poke_early().
Signed-off-by: David Daney <ddaney@xxxxxxxxxxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Jason Baron <jbaron@xxxxxxxxxx>
Cc: David Miller <davem@xxxxxxxxxxxxx>
---
arch/sparc/include/asm/jump_label.h | 1 +
arch/x86/include/asm/jump_label.h | 1 +
include/linux/jump_label.h | 6 ++++++
3 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/arch/sparc/include/asm/jump_label.h b/arch/sparc/include/asm/jump_label.h
index 62e66d7..9aa82d7 100644
--- a/arch/sparc/include/asm/jump_label.h
+++ b/arch/sparc/include/asm/jump_label.h
@@ -6,6 +6,7 @@
#include <linux/types.h>
#include <asm/system.h>
+#define HAVE_ARCH_JUMP_LABEL_TEXT_POKE_EARLY
#define JUMP_LABEL_NOP_SIZE 4
#define JUMP_LABEL(key, label) \
diff --git a/arch/x86/include/asm/jump_label.h b/arch/x86/include/asm/jump_label.h
index f52d42e..169cfd8 100644
--- a/arch/x86/include/asm/jump_label.h
+++ b/arch/x86/include/asm/jump_label.h
@@ -6,6 +6,7 @@
#include <linux/types.h>
#include <asm/nops.h>
+#define HAVE_ARCH_JUMP_LABEL_TEXT_POKE_EARLY
#define JUMP_LABEL_NOP_SIZE 5
# define JUMP_LABEL_INITIAL_NOP ".byte 0xe9 \n\t .long 0\n\t"
diff --git a/include/linux/jump_label.h b/include/linux/jump_label.h
index b72cd9f..e98ad3a 100644
--- a/include/linux/jump_label.h
+++ b/include/linux/jump_label.h
@@ -20,7 +20,13 @@ extern struct jump_entry __stop___jump_table[];
extern void arch_jump_label_transform(struct jump_entry *entry,
enum jump_label_type type);
+
+#ifdef HAVE_ARCH_JUMP_LABEL_TEXT_POKE_EARLY
extern void arch_jump_label_text_poke_early(jump_label_t addr);
+#else
+static inline void arch_jump_label_text_poke_early(jump_label_t addr) {}
+#endif
+
extern void jump_label_update(unsigned long key, enum jump_label_type type);
extern void jump_label_apply_nops(struct module *mod);
extern int jump_label_text_reserved(void *start, void *end);
--
1.7.2.2
