linux-kernel - [PATCH 0/5] uprobes: transition from kmap_atomic to kmap_local

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Message-ID: <20260103084243.195125-1-ming.jvle@gmail.com>
Date: Sat,  3 Jan 2026 16:42:38 +0800
From: Keke Ming <ming.jvle@...il.com>
To: mhiramat@...nel.org,
	oleg@...hat.com,
	peterz@...radead.org
Cc: linux@...linux.org.uk,
	catalin.marinas@....com,
	will@...nel.org,
	tsbogend@...ha.franken.de,
	pjw@...nel.org,
	palmer@...belt.com,
	aou@...s.berkeley.edu,
	akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org,
	linux-mm@...ck.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mips@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	Keke Ming <ming.jvle@...il.com>
Subject: [PATCH 0/5] uprobes: transition from kmap_atomic to kmap_local_page

The use of kmap_atomic/kunmap_atomic is deprecated. The purpose of
kmap-like functions is to create temporary mappings.

kmap_atomic() typically disables preemption, while kmap_local_page()
allows preemption.

According to the documentation, kmap_atomic() is primarily necessary
for contexts that cannot sleep.

> kmap_atomic() may also be used by interrupt contexts, since it does
> not sleep and the callers too may not sleep until after
> kunmap_atomic() is called.

> kunmap_atomic() may implicitly depend on the side effects of atomic
> mappings, i.e. disabling page faults or preemption, or both. In that
> case, explicit calls to pagefault_disable() or preempt_disable() or
> both must be made in conjunction with the use of kmap_local_page().

Link: https://docs.kernel.org/mm/highmem.html#temporary-virtual-mappings
Link: https://lwn.net/Articles/836144/

Keke Ming (5):
  riscv/uprobes: use kmap_local_page() in arch_uprobe_copy_ixol()
  arm64/uprobes: use kmap_local_page() in arch_uprobe_copy_ixol()
  mips/uprobes: use kmap_local_page() in arch_uprobe_copy_ixol()
  arm/uprobes: use kmap_local_page() in arch_uprobe_copy_ixol()
  uprobes: use kmap_local_page() for temporary page mappings

 arch/arm/probes/uprobes/core.c     |  4 ++--
 arch/arm64/kernel/probes/uprobes.c |  4 ++--
 arch/mips/kernel/uprobes.c         |  4 ++--
 arch/riscv/kernel/probes/uprobes.c |  4 ++--
 kernel/events/uprobes.c            | 12 ++++++------
 5 files changed, 14 insertions(+), 14 deletions(-)

-- 
2.43.0