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[103.168.172.201]) by smtp.gmail.com with ESMTPSA id af79cd13be357-8c37f5433b9sm1275881185a.49.2026.01.11.04.02.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 11 Jan 2026 04:02:56 -0800 (PST) Received: from phl-compute-12.internal (phl-compute-12.internal [10.202.2.52]) by mailfauth.phl.internal (Postfix) with ESMTP id 7212FF40068; Sun, 11 Jan 2026 07:02:54 -0500 (EST) Received: from phl-frontend-04 ([10.202.2.163]) by phl-compute-12.internal (MEProxy); Sun, 11 Jan 2026 07:02:54 -0500 X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeefgedrtddtgdduudegheduucetufdoteggodetrf dotffvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfurfetoffkrfgpnffqhgenuceu rghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujf gurhephffvvefufffkofgjfhgggfestdekredtredttdenucfhrhhomhepuehoqhhunhcu hfgvnhhguceosghoqhhunhdrfhgvnhhgsehgmhgrihhlrdgtohhmqeenucggtffrrghtth gvrhhnpedvveekvddtffelffelfedvudefffeuheejgeeivedufffgledvgeduveffueeh leenucffohhmrghinhepmhhsghhiugdrlhhinhhknecuvehluhhsthgvrhfuihiivgeptd enucfrrghrrghmpehmrghilhhfrhhomhepsghoqhhunhdomhgvshhmthhprghuthhhphgv rhhsohhnrghlihhthidqieelvdeghedtieegqddujeejkeehheehvddqsghoqhhunhdrfh gvnhhgpeepghhmrghilhdrtghomhesfhhigihmvgdrnhgrmhgvpdhnsggprhgtphhtthho peduiedpmhhouggvpehsmhhtphhouhhtpdhrtghpthhtohepphgvthgvrhiisehinhhfrh gruggvrggurdhorhhgpdhrtghpthhtohepmhhinhhgoheskhgvrhhnvghlrdhorhhgpdhr tghpthhtoheprhhushhtqdhfohhrqdhlihhnuhigsehvghgvrhdrkhgvrhhnvghlrdhorh hgpdhrtghpthhtoheplhhinhhugidqkhgvrhhnvghlsehvghgvrhdrkhgvrhhnvghlrdho rhhgpdhrtghpthhtohepfihilhhlsehkvghrnhgvlhdrohhrghdprhgtphhtthhopehmrg hrkhdrrhhuthhlrghnugesrghrmhdrtghomhdprhgtphhtthhopehtghhlgieslhhinhhu thhrohhnihigrdguvgdprhgtphhtthhopehojhgvuggrsehkvghrnhgvlhdrohhrghdprh gtphhtthhopehgrghrhiesghgrrhihghhuohdrnhgvth X-ME-Proxy: Feedback-ID: iad51458e:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Sun, 11 Jan 2026 07:02:53 -0500 (EST) From: Boqun Feng To: "Peter Zijlstra" , "Ingo Molnar" Cc: rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, "Will Deacon" , "Mark Rutland" , "Thomas Gleixner" , "Miguel Ojeda" , "Gary Guo" , "Alice Ryhl" , "Andreas Hindborg" , "Benno Lossin" , "Danilo Krummrich" , Boqun Feng , FUJITA Tomonori , Richard Weinberger Subject: [PATCH 16/36] arch: um/x86: Select ARCH_SUPPORTS_ATOMIC_RMW for UML_X86 Date: Sun, 11 Jan 2026 20:01:49 +0800 Message-ID: <20260111120209.6133-14-boqun.feng@gmail.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260111120209.6133-1-boqun.feng@gmail.com> References: <20260111115808.5702-1-boqun.feng@gmail.com> <20260111120209.6133-1-boqun.feng@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit x86 atomic instructions are used for um on UML_X86, therefore atomics on UML_X86 support native atomic RmW as x86 does, hence select ARCH_SUPPORTS_ATOMIC_RMW. Reviewed-by: FUJITA Tomonori Acked-by: Richard Weinberger Signed-off-by: Boqun Feng Link: https://patch.msgid.link/20260106034034.60074-1-boqun.feng@gmail.com --- arch/x86/um/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/um/Kconfig b/arch/x86/um/Kconfig index bdd7c8e39b01..44b12e45f9a0 100644 --- a/arch/x86/um/Kconfig +++ b/arch/x86/um/Kconfig @@ -9,6 +9,7 @@ endmenu config UML_X86 def_bool y select ARCH_USE_QUEUED_RWLOCKS + select ARCH_SUPPORTS_ATOMIC_RMW select ARCH_USE_QUEUED_SPINLOCKS select DCACHE_WORD_ACCESS select HAVE_EFFICIENT_UNALIGNED_ACCESS -- 2.51.0