[PATCH 5/5] uprobes: use kmap_local_page() for temporary page mappings
From: Keke Ming <hidden>
Date: 2026-01-03 08:48:12
Also in:
linux-arm-kernel, linux-mips, linux-mm, linux-riscv, lkml
Subsystem:
performance events subsystem, the rest, uprobes · Maintainers:
Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo, Namhyung Kim, Linus Torvalds, Masami Hiramatsu, Oleg Nesterov
Replace deprecated kmap_atomic() with kmap_local_page(). Signed-off-by: Keke Ming <redacted> --- 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 d546d32390a8..a7d7d83ca1d7 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; }
--
2.43.0