Move the definition of the code to be written from
__jump_label_transform() to a specialized function.
Signed-off-by: Daniel Bristot de Oliveira <bris...@redhat.com>
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Ingo Molnar <mi...@redhat.com>
Cc: Borislav Petkov <b...@alien8.de>
Cc: "H. Peter Anvin" <h...@zytor.com>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Cc: Masami Hiramatsu <mhira...@kernel.org>
Cc: "Steven Rostedt (VMware)" <rost...@goodmis.org>
Cc: Jiri Kosina <jkos...@suse.cz>
Cc: Josh Poimboeuf <jpoim...@redhat.com>
Cc: "Peter Zijlstra (Intel)" <pet...@infradead.org>
Cc: Chris von Recklinghausen <creck...@redhat.com>
Cc: Jason Baron <jba...@akamai.com>
Cc: Scott Wood <sw...@redhat.com>
Cc: Marcelo Tosatti <mtosa...@redhat.com>
Cc: Clark Williams <willi...@redhat.com>
Cc: x...@kernel.org
Cc: linux-kernel@vger.kernel.org
---
arch/x86/kernel/jump_label.c | 38 +++++++++++++++++++++---------------
1 file changed, 22 insertions(+), 16 deletions(-)
diff --git a/arch/x86/kernel/jump_label.c b/arch/x86/kernel/jump_label.c
index e443c43478eb..2ef687db5a87 100644
--- a/arch/x86/kernel/jump_label.c
+++ b/arch/x86/kernel/jump_label.c
@@ -73,30 +73,36 @@ static inline void __jump_label_trans_check_disable(struct
jump_entry *entry,
bug_at((void *)jump_entry_code(entry), line);
}
+static void __jump_label_set_jump_code(struct jump_entry *entry,
+ enum jump_label_type type,
+ union jump_code_union *code,
+ int init)
+{
+ const unsigned char *ideal_nop = ideal_nops[NOP_ATOMIC5];
+
+ code->jump = 0xe9;
+ code->offset = jump_entry_target(entry) -
+ (jump_entry_code(entry) + JUMP_LABEL_NOP_SIZE);
+
+ if (type == JUMP_LABEL_JMP) {
+ __jump_label_trans_check_enable(entry, type, ideal_nop, init);
+ } else {
+ __jump_label_trans_check_disable(entry, type, code, init);
+ memcpy(code, ideal_nop, JUMP_LABEL_NOP_SIZE);
+ }
+}
static void __ref __jump_label_transform(struct jump_entry *entry,
enum jump_label_type type,
void *(*poker)(void *, const void *,
size_t),
int init)
{
- union jump_code_union jmp;
- const unsigned char *ideal_nop = ideal_nops[NOP_ATOMIC5];
- const void *code;
-
- jmp.jump = 0xe9;
- jmp.offset = jump_entry_target(entry) -
- (jump_entry_code(entry) + JUMP_LABEL_NOP_SIZE);
+ union jump_code_union code;
if (early_boot_irqs_disabled)
poker = text_poke_early;
- if (type == JUMP_LABEL_JMP) {
- __jump_label_trans_check_enable(entry, type, ideal_nop, init);
- code = &jmp.code;
- } else {
- __jump_label_trans_check_disable(entry, type, &jmp, init);
- code = ideal_nop;
- }
+ __jump_label_set_jump_code(entry, type, &code, init);
/*
* Make text_poke_bp() a default fallback poker.
@@ -107,12 +113,12 @@ static void __ref __jump_label_transform(struct
jump_entry *entry,
*
*/
if (poker) {
- (*poker)((void *)jump_entry_code(entry), code,
+ (*poker)((void *)jump_entry_code(entry), &code,
JUMP_LABEL_NOP_SIZE);
return;
}
- text_poke_bp((void *)jump_entry_code(entry), code, JUMP_LABEL_NOP_SIZE,
+ text_poke_bp((void *)jump_entry_code(entry), &code, JUMP_LABEL_NOP_SIZE,
(void *)jump_entry_code(entry) + JUMP_LABEL_NOP_SIZE);
}
--
2.17.1
