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[v1,6/7] riscv: Use asm/insn.h for jump labels

Message ID 20220131182145.236005-7-kernel@esmil.dk (mailing list archive)
State New, archived
Headers show
Series Module relocation fixes and asm/insn.h header | expand

Commit Message

Emil Renner Berthing Jan. 31, 2022, 6:21 p.m. UTC 
This converts kernel/jump_label.c to use asm/insn.h to generate the
jump/nop instructions.

Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>
---
 arch/riscv/kernel/jump_label.c | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)
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Patch

diff --git a/arch/riscv/kernel/jump_label.c b/arch/riscv/kernel/jump_label.c
index 20e09056d141..b5b4892c3e9e 100644
--- a/arch/riscv/kernel/jump_label.c
+++ b/arch/riscv/kernel/jump_label.c
@@ -9,11 +9,9 @@ 
 #include <linux/memory.h>
 #include <linux/mutex.h>
 #include <asm/bug.h>
+#include <asm/insn.h>
 #include <asm/patch.h>
 
-#define RISCV_INSN_NOP 0x00000013U
-#define RISCV_INSN_JAL 0x0000006fU
-
 void arch_jump_label_transform(struct jump_entry *entry,
 			       enum jump_label_type type)
 {
@@ -23,14 +21,10 @@  void arch_jump_label_transform(struct jump_entry *entry,
 	if (type == JUMP_LABEL_JMP) {
 		long offset = jump_entry_target(entry) - jump_entry_code(entry);
 
-		if (WARN_ON(offset & 1 || offset < -524288 || offset >= 524288))
+		if (WARN_ON(!riscv_insn_valid_20bit_offset(offset)))
 			return;
 
-		insn = RISCV_INSN_JAL |
-			(((u32)offset & GENMASK(19, 12)) << (12 - 12)) |
-			(((u32)offset & GENMASK(11, 11)) << (20 - 11)) |
-			(((u32)offset & GENMASK(10,  1)) << (21 -  1)) |
-			(((u32)offset & GENMASK(20, 20)) << (31 - 20));
+		insn = RISCV_INSN_JAL | riscv_insn_j_imm(offset);
 	} else {
 		insn = RISCV_INSN_NOP;
 	}