Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Wed, 3 May 2023 13:06:44 +0200
From:   Frederic Weisbecker <frederic@kernel.org>
To:     Nicholas Piggin <npiggin@gmail.com>
Cc:     Arnd Bergmann <arnd@arndb.de>, linux-arch@vger.kernel.org,
        linux-kernel@vger.kernel.org, Vineet Gupta <vgupta@kernel.org>,
        linux-snps-arc@lists.infradead.org, Brian Cain <bcain@quicinc.com>,
        linux-hexagon@vger.kernel.org, Huacai Chen <chenhuacai@kernel.org>,
        loongarch@lists.linux.dev,
        Geert Uytterhoeven <geert@linux-m68k.org>,
        linux-m68k@lists.linux-m68k.org, Michal Simek <monstr@monstr.eu>,
        Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
        linux-mips@vger.kernel.org, Dinh Nguyen <dinguyen@kernel.org>,
        Jonas Bonn <jonas@southpole.se>,
        Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>,
        Stafford Horne <shorne@gmail.com>,
        linux-openrisc@vger.kernel.org,
        "James E.J. Bottomley" <James.Bottomley@hansenpartnership.com>,
        Helge Deller <deller@gmx.de>, linux-parisc@vger.kernel.org,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        linux-riscv@lists.infradead.org,
        Yoshinori Sato <ysato@users.sourceforge.jp>,
        Rich Felker <dalias@libc.org>,
        John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>,
        linux-sh@vger.kernel.org, "David S. Miller" <davem@davemloft.net>,
        sparclinux@vger.kernel.org, Richard Weinberger <richard@nod.at>,
        Anton Ivanov <anton.ivanov@cambridgegreys.com>,
        Johannes Berg <johannes@sipsolutions.net>,
        linux-um@lists.infradead.org, Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        Dave Hansen <dave.hansen@linux.intel.com>, x86@kernel.org,
        "H. Peter Anvin" <hpa@zytor.com>,
        Kevin Hilman <khilman@baylibre.com>
Subject: Re: [PATCH] Remove HAVE_VIRT_CPU_ACCOUNTING_GEN option
Message-ID: <ZFJARBDqWPLSy7Ge@localhost.localdomain>
References: <20230429063348.125544-1-npiggin@gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
In-Reply-To: <20230429063348.125544-1-npiggin@gmail.com>
Precedence: bulk

Le Sat, Apr 29, 2023 at 04:33:48PM +1000, Nicholas Piggin a ?crit :
> This option was created in commit 554b0004d0ec4 ("vtime: Add
> HAVE_VIRT_CPU_ACCOUNTING_GEN Kconfig") for architectures to indicate
> they support the 64-bit cputime_t required for VIRT_CPU_ACCOUNTING_GEN.
> 
> The cputime_t type has since been removed, so this doesn't have any
> meaning. Remove it.

Well, cputime_t has disappeared but not the u64 type used
for task/cpu time accounting.

But now we have the vtime seqcount. Though we already had it
when we introduced that Kconfig switch so I can't remember why
this was necessary :-(

It _looks_ OK but I might be missing something...

Thanks.