linux-kernel - [PATCH 33/49] x86/alternatives: Move the text_poke_array manipulation into text_poke_int3_loc_init() and rename it to __smp_text_poke_batch

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Message-ID: <20250328132704.1901674-34-mingo@kernel.org>
Date: Fri, 28 Mar 2025 14:26:48 +0100
From: Ingo Molnar <mingo@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: Juergen Gross <jgross@...e.com>,
	"H . Peter Anvin" <hpa@...or.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Borislav Petkov <bp@...en8.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...nel.org>
Subject: [PATCH 33/49] x86/alternatives: Move the text_poke_array manipulation into text_poke_int3_loc_init() and rename it to __smp_text_poke_batch_add()

This simplifies the code and code generation a bit:

   text	   data	    bss	    dec	    hex	filename
  14802	   1029	   4112	  19943	   4de7	alternative.o.before
  14784	   1029	   4112	  19925	   4dd5	alternative.o.after

Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/alternative.c | 18 ++++++------------
 1 file changed, 6 insertions(+), 12 deletions(-)

diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c
index 566b857d210d..f0351abcbfaa 100644
--- a/arch/x86/kernel/alternative.c
+++ b/arch/x86/kernel/alternative.c
@@ -2752,12 +2752,14 @@ static void smp_text_poke_batch_process(void)
 	}
 }
 
-static void text_poke_int3_loc_init(struct smp_text_poke_loc *tp, void *addr,
-			       const void *opcode, size_t len, const void *emulate)
+static void __smp_text_poke_batch_add(void *addr, const void *opcode, size_t len, const void *emulate)
 {
+	struct smp_text_poke_loc *tp;
 	struct insn insn;
 	int ret, i = 0;
 
+	tp = &text_poke_array.vec[text_poke_array.nr_entries++];
+
 	if (len == 6)
 		i = 1;
 	memcpy((void *)tp->text, opcode+i, len-i);
@@ -2873,12 +2875,8 @@ static void smp_text_poke_batch_flush(void *addr)
 
 void __ref smp_text_poke_batch_add(void *addr, const void *opcode, size_t len, const void *emulate)
 {
-	struct smp_text_poke_loc *tp;
-
 	smp_text_poke_batch_flush(addr);
-
-	tp = &text_poke_array.vec[text_poke_array.nr_entries++];
-	text_poke_int3_loc_init(tp, addr, opcode, len, emulate);
+	__smp_text_poke_batch_add(addr, opcode, len, emulate);
 }
 
 /**
@@ -2894,13 +2892,9 @@ void __ref smp_text_poke_batch_add(void *addr, const void *opcode, size_t len, c
  */
 void __ref smp_text_poke_single(void *addr, const void *opcode, size_t len, const void *emulate)
 {
-	struct smp_text_poke_loc *tp;
-
 	/* Batch-patching should not be mixed with single-patching: */
 	WARN_ON_ONCE(text_poke_array.nr_entries != 0);
 
-	tp = &text_poke_array.vec[text_poke_array.nr_entries++];
-	text_poke_int3_loc_init(tp, addr, opcode, len, emulate);
-
+	__smp_text_poke_batch_add(addr, opcode, len, emulate);
 	smp_text_poke_batch_finish();
 }
-- 
2.45.2