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Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w7tER-0000000EZ8M-2wDo; Wed, 01 Apr 2026 10:55:32 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w7tEO-0000000EZ69-3gmZ for linux-arm-kernel@lists.infradead.org; Wed, 01 Apr 2026 10:55:30 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 43486288E; Wed, 1 Apr 2026 03:55:22 -0700 (PDT) Received: from arm.com (usa-sjc-mx-foss1.foss.arm.com [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 8B90D3F915; Wed, 1 Apr 2026 03:55:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1775040928; bh=2UQIkCCHHnYMJL08xGfBrcE6awkfKjIUqvN58fjiAvQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=TRSFkRwVSzNZv1EfCfPXSKYVmxX06QSVIiXB2oC0ctF9sgb4BPVkTz4/bL14wnBvP tl/+mjzRctRS3PPkAAMR8vWfJH17iSvGYZ9S6iCow39/5NMpdbDUSVX7JsWwj0Vlqi NDVqY+hrLmqDreFqsDGT4UNSUnA0+gRm1bAfF/Nk= Date: Wed, 1 Apr 2026 11:55:20 +0100 From: Catalin Marinas To: Jinjie Ruan Cc: will@kernel.org, chenhuacai@kernel.org, kernel@xen0n.name, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, oleg@redhat.com, tglx@kernel.org, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, arnd@arndb.de, shuah@kernel.org, kevin.brodsky@arm.com, yeoreum.yun@arm.com, anshuman.khandual@arm.com, thuth@redhat.com, ryan.roberts@arm.com, mark.rutland@arm.com, song@kernel.org, ziyao@disroot.org, linusw@kernel.org, schuster.simon@siemens-energy.com, jremus@linux.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@efficios.com, kmal@cock.li, dvyukov@google.com, reddybalavignesh9979@gmail.com, x86@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, linux-s390@vger.kernel.org, linux-arch@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: Re: [PATCH v14 3/4] arm64: Use generic TIF bits for common thread flags Message-ID: References: <20260320104222.1381274-1-ruanjinjie@huawei.com> <20260320104222.1381274-4-ruanjinjie@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260320104222.1381274-4-ruanjinjie@huawei.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260401_035528_966692_40B56DCE X-CRM114-Status: GOOD ( 10.73 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, Mar 20, 2026 at 06:42:21PM +0800, Jinjie Ruan wrote: > Use the generic TIF bits defined in for > standard thread flags (TIF_SIGPENDING, TIF_NEED_RESCHED, TIF_NOTIFY_RESUME, > TIF_RESTORE_SIGMASK, TIF_SINGLESTEP, etc.) instead of defining > them locally. > > Arm64-specific bits (TIF_FOREIGN_FPSTATE, TIF_MTE_ASYNC_FAULT, TIF_SVE, > TIF_SSBD, etc.) are renumbered to start at bit 16 to avoid conflicts. > > This enables RSEQ optimizations which require CONFIG_HAVE_GENERIC_TIF_BITS > combined with the generic entry infrastructure (already used by arm64). > > By the way, remove TIF_FREEZE because this flag became unused since > commit d88e4cb67197 ("freezer: remove now unused TIF_FREEZE"). > > Cc: Thomas Gleixner > Reviewed-by: Kevin Brodsky > Reviewed-by: Linus Walleij > Reviewed-by: Yeoreum Yun > Signed-off-by: Jinjie Ruan Acked-by: Catalin Marinas Given that it's touching multiple trees, I guess it's a series for Andrew? -- Catalin