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Tue, 7 Nov 2023 21:59:09 +0000 From: Ankur Arora To: linux-kernel@vger.kernel.org Cc: tglx@linutronix.de, peterz@infradead.org, torvalds@linux-foundation.org, paulmck@kernel.org, linux-mm@kvack.org, x86@kernel.org, akpm@linux-foundation.org, luto@kernel.org, bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, mingo@redhat.com, juri.lelli@redhat.com, vincent.guittot@linaro.org, willy@infradead.org, mgorman@suse.de, jon.grimm@amd.com, bharata@amd.com, raghavendra.kt@amd.com, boris.ostrovsky@oracle.com, konrad.wilk@oracle.com, jgross@suse.com, andrew.cooper3@citrix.com, mingo@kernel.org, bristot@kernel.org, mathieu.desnoyers@efficios.com, geert@linux-m68k.org, glaubitz@physik.fu-berlin.de, anton.ivanov@cambridgegreys.com, mattst88@gmail.com, krypton@ulrich-teichert.org, rostedt@goodmis.org, David.Laight@ACULAB.COM, richard@nod.at, mjguzik@gmail.com, Ankur Arora Subject: [RFC PATCH 29/86] Revert "preempt/dynamic: Provide cond_resched() and might_resched() static calls" Date: Tue, 7 Nov 2023 13:57:15 -0800 Message-Id: <20231107215742.363031-30-ankur.a.arora@oracle.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20231107215742.363031-1-ankur.a.arora@oracle.com> References: <20231107215742.363031-1-ankur.a.arora@oracle.com> X-ClientProxiedBy: MW4PR03CA0056.namprd03.prod.outlook.com (2603:10b6:303:8e::31) To CO6PR10MB5409.namprd10.prod.outlook.com (2603:10b6:5:357::14) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO6PR10MB5409:EE_|CY5PR10MB6141:EE_ X-MS-Office365-Filtering-Correlation-Id: 70876bdf-73a5-4e0a-0425-08dbdfdcc536 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Tue, 07 Nov 2023 14:03:11 -0800 (PST) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1781944407226649672 X-GMAIL-MSGID: 1781944407226649672 This reverts commit b965f1ddb47daa5b8b2e2bc9c921431236830367. Signed-off-by: Ankur Arora --- include/linux/kernel.h | 22 +++------------------- include/linux/sched.h | 27 +++------------------------ kernel/sched/core.c | 14 +++----------- 3 files changed, 9 insertions(+), 54 deletions(-) diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 5f99720d0cca..cf077cd69643 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -30,7 +30,6 @@ #include #include #include -#include #include #include @@ -97,26 +96,11 @@ struct completion; struct user; #ifdef CONFIG_PREEMPT_VOLUNTARY - -extern int __cond_resched(void); -# define might_resched() __cond_resched() - -#elif defined(CONFIG_PREEMPT_DYNAMIC) - -extern int __cond_resched(void); - -DECLARE_STATIC_CALL(might_resched, __cond_resched); - -static __always_inline void might_resched(void) -{ - static_call(might_resched)(); -} - +extern int _cond_resched(void); +# define might_resched() _cond_resched() #else - # define might_resched() do { } while (0) - -#endif /* CONFIG_PREEMPT_* */ +#endif #ifdef CONFIG_DEBUG_ATOMIC_SLEEP extern void __might_resched(const char *file, int line, unsigned int offsets); diff --git a/include/linux/sched.h b/include/linux/sched.h index 2b1f3008c90e..95d47783ff6e 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -2081,32 +2081,11 @@ static inline int test_tsk_need_resched(struct task_struct *tsk) * value indicates whether a reschedule was done in fact. * cond_resched_lock() will drop the spinlock before scheduling, */ -#if !defined(CONFIG_PREEMPTION) || defined(CONFIG_PREEMPT_DYNAMIC) -extern int __cond_resched(void); - -#ifdef CONFIG_PREEMPT_DYNAMIC - -DECLARE_STATIC_CALL(cond_resched, __cond_resched); - -static __always_inline int _cond_resched(void) -{ - return static_call(cond_resched)(); -} - +#ifndef CONFIG_PREEMPTION +extern int _cond_resched(void); #else - -static inline int _cond_resched(void) -{ - return __cond_resched(); -} - -#endif /* CONFIG_PREEMPT_DYNAMIC */ - -#else - static inline int _cond_resched(void) { return 0; } - -#endif /* !defined(CONFIG_PREEMPTION) || defined(CONFIG_PREEMPT_DYNAMIC) */ +#endif #define cond_resched() ({ \ __might_resched(__FILE__, __LINE__, 0); \ diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 2e191992109b..5a0bf43975d4 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -8515,8 +8515,8 @@ SYSCALL_DEFINE0(sched_yield) return 0; } -#if !defined(CONFIG_PREEMPTION) || defined(CONFIG_PREEMPT_DYNAMIC) -int __sched __cond_resched(void) +#ifndef CONFIG_PREEMPTION +int __sched _cond_resched(void) { if (should_resched(0)) { preempt_schedule_common(); @@ -8538,15 +8538,7 @@ int __sched __cond_resched(void) #endif return 0; } -EXPORT_SYMBOL(__cond_resched); -#endif - -#ifdef CONFIG_PREEMPT_DYNAMIC -DEFINE_STATIC_CALL_RET0(cond_resched, __cond_resched); -EXPORT_STATIC_CALL(cond_resched); - -DEFINE_STATIC_CALL_RET0(might_resched, __cond_resched); -EXPORT_STATIC_CALL(might_resched); +EXPORT_SYMBOL(_cond_resched); #endif /*