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Tue, 16 Jul 2024 10:15:08 -0400 (EDT) From: Jiaxun Yang Date: Tue, 16 Jul 2024 22:14:58 +0800 Subject: [PATCH v3 1/3] cpu/hotplug: Make HOTPLUG_PARALLEL independent of HOTPLUG_SMT 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: quoted-printable Message-Id: <20240716-loongarch-hotplug-v3-1-af59b3bb35c8@flygoat.com> References: <20240716-loongarch-hotplug-v3-0-af59b3bb35c8@flygoat.com> In-Reply-To: <20240716-loongarch-hotplug-v3-0-af59b3bb35c8@flygoat.com> To: Thomas Gleixner , Peter Zijlstra , Huacai Chen , WANG Xuerui Cc: linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, Jiaxun Yang X-Mailer: b4 0.14.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1139; i=jiaxun.yang@flygoat.com; h=from:subject:message-id; bh=ipsmsZYbAnzZ2nLzzwwb1hP9L5BCCXst27sn5MQXPoE=; b=owGbwMvMwCXmXMhTe71c8zDjabUkhrRpDenPv5gq+2X9T4xZtGGpdNW3iEuSD1UeHLlR9GSRV XJPYsiqjlIWBjEuBlkxRZYQAaW+DY0XF1x/kPUHZg4rE8gQBi5OAZiIRR7DP7srZrbfGDadSAnQ nF+5YtlVjqOnqr40XfedpZpjNNP9lAXDfzfVF9elJuc8FuY1+j/n3MfPex65RljunV04//zyg/O WfOQEAA== X-Developer-Key: i=jiaxun.yang@flygoat.com; a=openpgp; fpr=980379BEFEBFBF477EA04EF9C111949073FC0F67 Provide stub function for SMT related parallel bring up functions so that HOTPLUG_PARALLEL can work without HOTPLUG_SMT. Signed-off-by: Jiaxun Yang --- v2: Use stub function (tglx) v3: Improve commit message (tglx) --- kernel/cpu.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/kernel/cpu.c b/kernel/cpu.c index 1209ddaec026..c89e0e91379a 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -1808,6 +1808,7 @@ static int __init parallel_bringup_parse_param(char *= arg) } early_param("cpuhp.parallel", parallel_bringup_parse_param); =20 +#ifdef CONFIG_HOTPLUG_SMT static inline bool cpuhp_smt_aware(void) { return cpu_smt_max_threads > 1; @@ -1817,6 +1818,16 @@ static inline const struct cpumask *cpuhp_get_primar= y_thread_mask(void) { return cpu_primary_thread_mask; } +#else +static inline bool cpuhp_smt_aware(void) +{ + return false; +} +static inline const struct cpumask *cpuhp_get_primary_thread_mask(void) +{ + return cpu_none_mask; +} +#endif =20 /* * On architectures which have enabled parallel bringup this invokes all BP --=20 2.45.2