[tip: x86/cleanups] x86/alternative: Align insn bytes vertically

[tip-bot2 for Borislav Petkov]

The following commit has been merged into the x86/cleanups branch of tip:

Commit-ID:     7ee0e638a526b2d1f09c714f86d82dfd7628f322
Gitweb:        https://git.kernel.org/tip/7ee0e638a526b2d1f09c714f86d82dfd7628f322
Author:        Borislav Petkov <bp@xxxxxxx>
AuthorDate:    Tue, 01 Jun 2021 21:30:56 +02:00
Committer:     Borislav Petkov <bp@xxxxxxx>
CommitterDate: Thu, 03 Jun 2021 14:24:44 +02:00

x86/alternative: Align insn bytes vertically

For easier inspection which bytes have changed.

For example:

  feat: 7*32+12, old: (__x86_indirect_thunk_r10+0x0/0x20 (ffffffff81c02480) len: 17), repl: (ffffffff897813aa, len: 17)
  ffffffff81c02480:   old_insn: 41 ff e2 90 90 90 90 90 90 90 90 90 90 90 90 90 90
  ffffffff897813aa:   rpl_insn: e8 07 00 00 00 f3 90 0f ae e8 eb f9 4c 89 14 24 c3
  ffffffff81c02480: final_insn: e8 07 00 00 00 f3 90 0f ae e8 eb f9 4c 89 14 24 c3

No functional changes.

Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Link: https://lkml.kernel.org/r/20210601193713.16190-1-bp@xxxxxxxxx
---
 arch/x86/kernel/alternative.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c
index 75c752b..227c4a8 100644
--- a/arch/x86/kernel/alternative.c
+++ b/arch/x86/kernel/alternative.c
@@ -273,8 +273,8 @@ void __init_or_module noinline apply_alternatives(struct alt_instr *start,
 			instr, instr, a->instrlen,
 			replacement, a->replacementlen);
 
-		DUMP_BYTES(instr, a->instrlen, "%px: old_insn: ", instr);
-		DUMP_BYTES(replacement, a->replacementlen, "%px: rpl_insn: ", replacement);
+		DUMP_BYTES(instr, a->instrlen, "%px:   old_insn: ", instr);
+		DUMP_BYTES(replacement, a->replacementlen, "%px:   rpl_insn: ", replacement);
 
 		memcpy(insn_buff, replacement, a->replacementlen);
 		insn_buff_sz = a->replacementlen;