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([210.73.43.101]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7ff7e197983sm42704939b3a.33.2026.01.03.00.47.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 03 Jan 2026 00:47:47 -0800 (PST) From: Keke Ming To: mhiramat@kernel.org, oleg@redhat.com, peterz@infradead.org Cc: linux@armlinux.org.uk, catalin.marinas@arm.com, will@kernel.org, tsbogend@alpha.franken.de, pjw@kernel.org, palmer@dabbelt.com, aou@eecs.berkeley.edu, akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, linux-riscv@lists.infradead.org, Keke Ming Subject: [PATCH 0/5] uprobes: transition from kmap_atomic to kmap_local_page Date: Sat, 3 Jan 2026 16:42:38 +0800 Message-ID: <20260103084243.195125-1-ming.jvle@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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