linux-kernel - [tip: smp/core] cpu/hotplug: Remove dependancy against cpu_primary_thread

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Message-ID: <169053107559.28540.11243157708630222054.tip-bot2@tip-bot2>
Date:   Fri, 28 Jul 2023 07:57:55 -0000
From:   "tip-bot2 for Laurent Dufour" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Laurent Dufour <ldufour@...ux.ibm.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Zhang Rui <rui.zhang@...el.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: smp/core] cpu/hotplug: Remove dependancy against
 cpu_primary_thread_mask

The following commit has been merged into the smp/core branch of tip:

Commit-ID:     7a4dcb4a5de1214c4a59448a759e2e264c2c4473
Gitweb:        https://git.kernel.org/tip/7a4dcb4a5de1214c4a59448a759e2e264c2c4473
Author:        Laurent Dufour <ldufour@...ux.ibm.com>
AuthorDate:    Wed, 05 Jul 2023 16:51:34 +02:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Fri, 28 Jul 2023 09:53:36 +02:00

cpu/hotplug: Remove dependancy against cpu_primary_thread_mask

The commit 18415f33e2ac ("cpu/hotplug: Allow "parallel" bringup up to
CPUHP_BP_KICK_AP_STATE") introduce a dependancy against a global variable
cpu_primary_thread_mask exported by the X86 code. This variable is only
used when CONFIG_HOTPLUG_PARALLEL is set.

Since cpuhp_get_primary_thread_mask() and cpuhp_smt_aware() are only used
when CONFIG_HOTPLUG_PARALLEL is set, don't define them when it is not set.

No functional change.

Signed-off-by: Laurent Dufour <ldufour@...ux.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Tested-by: Zhang Rui <rui.zhang@...el.com>
Link: https://lore.kernel.org/r/20230705145143.40545-2-ldufour@linux.ibm.com

---
 kernel/cpu.c | 24 ++++++++++--------------
 1 file changed, 10 insertions(+), 14 deletions(-)

diff --git a/kernel/cpu.c b/kernel/cpu.c
index 88a7ede..03309f2 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -650,22 +650,8 @@ bool cpu_smt_possible(void)
 }
 EXPORT_SYMBOL_GPL(cpu_smt_possible);
 
-static inline bool cpuhp_smt_aware(void)
-{
-	return topology_smt_supported();
-}
-
-static inline const struct cpumask *cpuhp_get_primary_thread_mask(void)
-{
-	return cpu_primary_thread_mask;
-}
 #else
 static inline bool cpu_smt_allowed(unsigned int cpu) { return true; }
-static inline bool cpuhp_smt_aware(void) { return false; }
-static inline const struct cpumask *cpuhp_get_primary_thread_mask(void)
-{
-	return cpu_present_mask;
-}
 #endif
 
 static inline enum cpuhp_state
@@ -1793,6 +1779,16 @@ static int __init parallel_bringup_parse_param(char *arg)
 }
 early_param("cpuhp.parallel", parallel_bringup_parse_param);
 
+static inline bool cpuhp_smt_aware(void)
+{
+	return topology_smt_supported();
+}
+
+static inline const struct cpumask *cpuhp_get_primary_thread_mask(void)
+{
+	return cpu_primary_thread_mask;
+}
+
 /*
  * On architectures which have enabled parallel bringup this invokes all BP
  * prepare states for each of the to be onlined APs first. The last state