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Sat, 11 May 2024 12:00:16 -0400 (EDT) From: Jiaxun Yang Date: Sat, 11 May 2024 17:00:10 +0100 Subject: [PATCH 3/7] MIPS: csrc-r4k: Select HAVE_UNSTABLE_SCHED_CLOCK if 64BIT Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20240511-mips-clks-v1-3-ddb4a10ee9f9@flygoat.com> References: <20240511-mips-clks-v1-0-ddb4a10ee9f9@flygoat.com> In-Reply-To: <20240511-mips-clks-v1-0-ddb4a10ee9f9@flygoat.com> To: Thomas Bogendoerfer , Serge Semin , Daniel Lezcano , Thomas Gleixner Cc: linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org, Jiaxun Yang X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=683; i=jiaxun.yang@flygoat.com; h=from:subject:message-id; bh=XX4ugxlQhFsZAkH9R4LtJMvFZc0CkYDJTh5AfKON094=; b=owGbwMvMwCHmXMhTe71c8zDjabUkhjT7aZxc8ez3fnL/P5OzYcGyDM5C/4CLzBPOHjmSWJf2Z tu2678WdZSyMIhxMMiKKbKECCj1bWi8uOD6g6w/MHNYmUCGMHBxCsBE4rQYGbZ6OjIr/D3X+Hnn StO015r3n5nZziroanHUF19ueGO2nQ/DP41jEefexBZyiC86/UOvtuiUT+yfB5/4qyPU94ts0GW bwQUA X-Developer-Key: i=jiaxun.yang@flygoat.com; a=openpgp; fpr=980379BEFEBFBF477EA04EF9C111949073FC0F67 csrc-r4k suffers from SMP synchronization overhead. Select HAVE_UNSTABLE_SCHED_CLOCK to workaround drift between the CPUs on the system. HAVE_UNSTABLE_SCHED_CLOCK requires cmpxchg64, so enable it for 64 bits only. Signed-off-by: Jiaxun Yang --- arch/mips/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index f1aa1bf11166..fa8ca0287568 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -1083,6 +1083,7 @@ config CSRC_IOASIC config CSRC_R4K select CLOCKSOURCE_WATCHDOG if CPU_FREQ + select HAVE_UNSTABLE_SCHED_CLOCK if 64BIT bool config CSRC_SB1250 -- 2.34.1