linux-kernel - [tip: sched/core] x86/itmt: Convert "sysctl_sched_itmt

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Message-ID: <173693263776.31546.17073955195344462319.tip-bot2@tip-bot2>
Date: Wed, 15 Jan 2025 09:17:17 -0000
From: "tip-bot2 for K Prateek Nayak" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: K Prateek Nayak <kprateek.nayak@....com>,
 "Peter Zijlstra (Intel)" <peterz@...radead.org>,
 Tim Chen <tim.c.chen@...ux.intel.com>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject:
 [tip: sched/core] x86/itmt: Convert "sysctl_sched_itmt_enabled" to boolean

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

Commit-ID:     2f6f726bdda5f24227de10bc599038e0ca0d65f4
Gitweb:        https://git.kernel.org/tip/2f6f726bdda5f24227de10bc599038e0ca0d65f4
Author:        K Prateek Nayak <kprateek.nayak@....com>
AuthorDate:    Mon, 23 Dec 2024 04:34:00 
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Mon, 13 Jan 2025 14:10:23 +01:00

x86/itmt: Convert "sysctl_sched_itmt_enabled" to boolean

In preparation to move "sysctl_sched_itmt_enabled" to debugfs, convert
the unsigned int to bool since debugfs readily exposes boolean fops
primitives (debugfs_read_file_bool, debugfs_write_file_bool) which can
streamline the conversion.

Since the current ctl_table initializes extra1 and extra2 to SYSCTL_ZERO
and SYSCTL_ONE respectively, the value of "sysctl_sched_itmt_enabled"
can only be 0 or 1 and this datatype conversion should not cause any
functional changes.

Signed-off-by: K Prateek Nayak <kprateek.nayak@....com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Reviewed-by: Tim Chen <tim.c.chen@...ux.intel.com>
Link: https://lore.kernel.org/r/20241223043407.1611-2-kprateek.nayak@amd.com
---
 arch/x86/include/asm/topology.h | 4 ++--
 arch/x86/kernel/itmt.c          | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h
index fd41103..63bab25 100644
--- a/arch/x86/include/asm/topology.h
+++ b/arch/x86/include/asm/topology.h
@@ -250,7 +250,7 @@ extern bool x86_topology_update;
 #include <asm/percpu.h>
 
 DECLARE_PER_CPU_READ_MOSTLY(int, sched_core_priority);
-extern unsigned int __read_mostly sysctl_sched_itmt_enabled;
+extern bool __read_mostly sysctl_sched_itmt_enabled;
 
 /* Interface to set priority of a cpu */
 void sched_set_itmt_core_prio(int prio, int core_cpu);
@@ -263,7 +263,7 @@ void sched_clear_itmt_support(void);
 
 #else /* CONFIG_SCHED_MC_PRIO */
 
-#define sysctl_sched_itmt_enabled	0
+#define sysctl_sched_itmt_enabled	false
 static inline void sched_set_itmt_core_prio(int prio, int core_cpu)
 {
 }
diff --git a/arch/x86/kernel/itmt.c b/arch/x86/kernel/itmt.c
index 51b805c..28f4491 100644
--- a/arch/x86/kernel/itmt.c
+++ b/arch/x86/kernel/itmt.c
@@ -36,7 +36,7 @@ static bool __read_mostly sched_itmt_capable;
  *
  * It can be set via /proc/sys/kernel/sched_itmt_enabled
  */
-unsigned int __read_mostly sysctl_sched_itmt_enabled;
+bool __read_mostly sysctl_sched_itmt_enabled;
 
 static int sched_itmt_update_handler(const struct ctl_table *table, int write,
 				     void *buffer, size_t *lenp, loff_t *ppos)