linux-kernel - [tip: perf/core] uprobes: use kmap_local

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Message-ID: <176820496954.510.6355066077664200722.tip-bot2@tip-bot2>
Date: Mon, 12 Jan 2026 08:02:49 -0000
From: "tip-bot2 for Keke Ming" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Keke Ming <ming.jvle@...il.com>,
 "Peter Zijlstra (Intel)" <peterz@...radead.org>,
 Oleg Nesterov <oleg@...hat.com>, x86@...nel.org, linux-kernel@...r.kernel.org
Subject:
 [tip: perf/core] uprobes: use kmap_local_page() for temporary page mappings

The following commit has been merged into the perf/core branch of tip:

Commit-ID:     a491c02c2770c9c2d02b96fad7e3a176d77bb737
Gitweb:        https://git.kernel.org/tip/a491c02c2770c9c2d02b96fad7e3a176d77bb737
Author:        Keke Ming <ming.jvle@...il.com>
AuthorDate:    Sat, 03 Jan 2026 16:42:43 +08:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Tue, 06 Jan 2026 16:34:28 +01:00

uprobes: use kmap_local_page() for temporary page mappings

Replace deprecated kmap_atomic() with kmap_local_page().

Signed-off-by: Keke Ming <ming.jvle@...il.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Acked-by: Oleg Nesterov <oleg@...hat.com>
Link: https://patch.msgid.link/20260103084243.195125-6-ming.jvle@gmail.com
---
 kernel/events/uprobes.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index d546d32..a7d7d83 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -179,16 +179,16 @@ bool __weak is_trap_insn(uprobe_opcode_t *insn)
 
 void uprobe_copy_from_page(struct page *page, unsigned long vaddr, void *dst, int len)
 {
-	void *kaddr = kmap_atomic(page);
+	void *kaddr = kmap_local_page(page);
 	memcpy(dst, kaddr + (vaddr & ~PAGE_MASK), len);
-	kunmap_atomic(kaddr);
+	kunmap_local(kaddr);
 }
 
 static void copy_to_page(struct page *page, unsigned long vaddr, const void *src, int len)
 {
-	void *kaddr = kmap_atomic(page);
+	void *kaddr = kmap_local_page(page);
 	memcpy(kaddr + (vaddr & ~PAGE_MASK), src, len);
-	kunmap_atomic(kaddr);
+	kunmap_local(kaddr);
 }
 
 static int verify_opcode(struct page *page, unsigned long vaddr, uprobe_opcode_t *insn,
@@ -323,7 +323,7 @@ __update_ref_ctr(struct mm_struct *mm, unsigned long vaddr, short d)
 		return ret == 0 ? -EBUSY : ret;
 	}
 
-	kaddr = kmap_atomic(page);
+	kaddr = kmap_local_page(page);
 	ptr = kaddr + (vaddr & ~PAGE_MASK);
 
 	if (unlikely(*ptr + d < 0)) {
@@ -336,7 +336,7 @@ __update_ref_ctr(struct mm_struct *mm, unsigned long vaddr, short d)
 	*ptr += d;
 	ret = 0;
 out:
-	kunmap_atomic(kaddr);
+	kunmap_local(kaddr);
 	put_page(page);
 	return ret;
 }