jump_label: make initial NOP patching the special case

Instead of defaulting to patching NOP opcodes at init time, and leaving
it to the architectures to override this if this is not needed, switch
to a model where doing nothing is the default. This is the common case
by far, as only MIPS requires NOP patching at init time. On all other
architectures, the correct encodings are emitted by the compiler and so
no initial patching is needed.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220615154142.1574619-4-ardb@kernel.org

1 files changed, 0 insertions, 11 deletions

diff --git a/arch/parisc/kernel/jump_label.c b/arch/parisc/kernel/jump_label.c
index d2f3cb12e282..e253b134500d 100644
--- a/arch/parisc/kernel/jump_label.c
+++ b/arch/parisc/kernel/jump_label.c
@@ -42,14 +42,3 @@ void arch_jump_label_transform(struct jump_entry *entry,
 
 	patch_text(addr, insn);
 }
-
-void arch_jump_label_transform_static(struct jump_entry *entry,
-				      enum jump_label_type type)
-{
-	/*
-	 * We use the architected NOP in arch_static_branch, so there's no
-	 * need to patch an identical NOP over the top of it here. The core
-	 * will call arch_jump_label_transform from a module notifier if the
-	 * NOP needs to be replaced by a branch.
-	 */
-}