linux-kernel - [PATCH 32/49] x86/alternatives: Rename 'int3_refs' to 'text_poke_array

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Message-ID: <20250328132704.1901674-33-mingo@kernel.org>
Date: Fri, 28 Mar 2025 14:26:47 +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 32/49] x86/alternatives: Rename 'int3_refs' to 'text_poke_array_refs'

Make it clear that these reference counts lock access
to text_poke_array.

Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/alternative.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c
index 34d3c69595a0..566b857d210d 100644
--- a/arch/x86/kernel/alternative.c
+++ b/arch/x86/kernel/alternative.c
@@ -2473,11 +2473,11 @@ static struct smp_text_poke_array {
 	struct smp_text_poke_loc vec[TP_ARRAY_NR_ENTRIES_MAX];
 } text_poke_array;
 
-static DEFINE_PER_CPU(atomic_t, int3_refs);
+static DEFINE_PER_CPU(atomic_t, text_poke_array_refs);
 
 static bool try_get_text_poke_array(void)
 {
-	atomic_t *refs = this_cpu_ptr(&int3_refs);
+	atomic_t *refs = this_cpu_ptr(&text_poke_array_refs);
 
 	if (!raw_atomic_inc_not_zero(refs))
 		return false;
@@ -2487,7 +2487,7 @@ static bool try_get_text_poke_array(void)
 
 static __always_inline void put_text_poke_array(void)
 {
-	atomic_t *refs = this_cpu_ptr(&int3_refs);
+	atomic_t *refs = this_cpu_ptr(&text_poke_array_refs);
 
 	smp_mb__before_atomic();
 	raw_atomic_dec(refs);
@@ -2522,9 +2522,9 @@ noinstr int smp_text_poke_int3_trap_handler(struct pt_regs *regs)
 	 * Having observed our INT3 instruction, we now must observe
 	 * text_poke_array with non-zero refcount:
 	 *
-	 *	int3_refs = 1		INT3
+	 *	text_poke_array_refs = 1		INT3
 	 *	WMB			RMB
-	 *	write INT3		if (int3_refs != 0)
+	 *	write INT3		if (text_poke_array_refs != 0)
 	 */
 	smp_rmb();
 
@@ -2623,7 +2623,7 @@ static void smp_text_poke_batch_process(void)
 	 * ensure reading a non-zero refcount provides up to date text_poke_array data.
 	 */
 	for_each_possible_cpu(i)
-		atomic_set_release(per_cpu_ptr(&int3_refs, i), 1);
+		atomic_set_release(per_cpu_ptr(&text_poke_array_refs, i), 1);
 
 	/*
 	 * Function tracing can enable thousands of places that need to be
@@ -2745,7 +2745,7 @@ static void smp_text_poke_batch_process(void)
 	 * unused.
 	 */
 	for_each_possible_cpu(i) {
-		atomic_t *refs = per_cpu_ptr(&int3_refs, i);
+		atomic_t *refs = per_cpu_ptr(&text_poke_array_refs, i);
 
 		if (unlikely(!atomic_dec_and_test(refs)))
 			atomic_cond_read_acquire(refs, !VAL);
-- 
2.45.2