linux-kernel - [tip: x86/percpu] x86/traps: Use current_top_of

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Message-ID: <170229637816.398.6506455819507623200.tip-bot2@tip-bot2>
Date:   Mon, 11 Dec 2023 12:06:18 -0000
From:   "tip-bot2 for Uros Bizjak" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Uros Bizjak <ubizjak@...il.com>, Ingo Molnar <mingo@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: x86/percpu] x86/traps: Use current_top_of_stack() helper in traps.c

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

Commit-ID:     13408c6ae684181d53c870cceddbd3a62ae34c3e
Gitweb:        https://git.kernel.org/tip/13408c6ae684181d53c870cceddbd3a62ae34c3e
Author:        Uros Bizjak <ubizjak@...il.com>
AuthorDate:    Mon, 04 Dec 2023 22:02:30 +01:00
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Mon, 11 Dec 2023 11:47:15 +01:00

x86/traps: Use current_top_of_stack() helper in traps.c

Use current_top_of_stack() helper in sync_regs() and vc_switch_off_ist()
instead of open-coding the reading of  the top_of_stack percpu variable
explicitly.

Signed-off-by: Uros Bizjak <ubizjak@...il.com>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Link: https://lore.kernel.org/r/20231204210320.114429-2-ubizjak@gmail.com
---
 arch/x86/kernel/traps.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index c876f1d..78b1d1a 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -772,7 +772,7 @@ DEFINE_IDTENTRY_RAW(exc_int3)
  */
 asmlinkage __visible noinstr struct pt_regs *sync_regs(struct pt_regs *eregs)
 {
-	struct pt_regs *regs = (struct pt_regs *)this_cpu_read(pcpu_hot.top_of_stack) - 1;
+	struct pt_regs *regs = (struct pt_regs *)current_top_of_stack() - 1;
 	if (regs != eregs)
 		*regs = *eregs;
 	return regs;
@@ -790,7 +790,7 @@ asmlinkage __visible noinstr struct pt_regs *vc_switch_off_ist(struct pt_regs *r
 	 * trust it and switch to the current kernel stack
 	 */
 	if (ip_within_syscall_gap(regs)) {
-		sp = this_cpu_read(pcpu_hot.top_of_stack);
+		sp = current_top_of_stack();
 		goto sync;
 	}