From: Ingo Molnar <mingo@kernel.org>
Date: Fri, 11 Apr 2025 05:40:44 +0000 (+0200)
Subject: x86/alternatives: Simplify smp_text_poke_int3_handler()
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=8e35752f0c334ee3eb2bf075ac0bdb243ad25fac;p=users%2Fdwmw2%2Flinux.git

x86/alternatives: Simplify smp_text_poke_int3_handler()

Remove the 'desc' local variable indirection and use
text_poke_array directly.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Juergen Gross <jgross@suse.com>
Cc: "H . Peter Anvin" <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250411054105.2341982-33-mingo@kernel.org
---

diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c
index edc18be4fac4f..97cb954467ff8 100644
--- a/arch/x86/kernel/alternative.c
+++ b/arch/x86/kernel/alternative.c
@@ -2511,7 +2511,6 @@ static __always_inline int patch_cmp(const void *key, const void *elt)
 
 noinstr int smp_text_poke_int3_handler(struct pt_regs *regs)
 {
-	struct smp_text_poke_array *desc;
 	struct smp_text_poke_loc *tp;
 	int ret = 0;
 	void *ip;
@@ -2531,9 +2530,6 @@ noinstr int smp_text_poke_int3_handler(struct pt_regs *regs)
 
 	if (!try_get_text_poke_array())
 		return 0;
-	desc = &text_poke_array;
-
-	WARN_ON_ONCE(desc->vec != text_poke_array.vec);
 
 	/*
 	 * Discount the INT3. See smp_text_poke_batch_process().
@@ -2543,14 +2539,14 @@ noinstr int smp_text_poke_int3_handler(struct pt_regs *regs)
 	/*
 	 * Skip the binary search if there is a single member in the vector.
 	 */
-	if (unlikely(desc->nr_entries > 1)) {
-		tp = __inline_bsearch(ip, desc->vec, desc->nr_entries,
+	if (unlikely(text_poke_array.nr_entries > 1)) {
+		tp = __inline_bsearch(ip, text_poke_array.vec, text_poke_array.nr_entries,
 				      sizeof(struct smp_text_poke_loc),
 				      patch_cmp);
 		if (!tp)
 			goto out_put;
 	} else {
-		tp = desc->vec;
+		tp = text_poke_array.vec;
 		if (text_poke_addr(tp) != ip)
 			goto out_put;
 	}