Commit 7f2a53c2 authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

rcu: Remove unused __rcu_is_watching() function 



The x86/entry work removed all uses of __rcu_is_watching(), therefore
this commit removes it entirely.

Cc: Andy Lutomirski <luto@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: <x86@kernel.org>
Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent 666ca290

include/linux/rcutiny.h

+0 −1
Original line number Diff line number Diff line
@@ -103,7 +103,6 @@ static inline void rcu_scheduler_starting(void) { } 
static inline void rcu_end_inkernel_boot(void) { }

static inline bool rcu_inkernel_boot_has_ended(void) { return true; }

static inline bool rcu_is_watching(void) { return true; }

static inline bool __rcu_is_watching(void) { return true; }

static inline void rcu_momentary_dyntick_idle(void) { }

static inline void kfree_rcu_scheduler_running(void) { }

static inline bool rcu_gp_might_be_stalled(void) { return false; }

include/linux/rcutree.h

+0 −1
Original line number Diff line number Diff line
@@ -64,7 +64,6 @@ extern int rcu_scheduler_active __read_mostly; 
void rcu_end_inkernel_boot(void);

bool rcu_inkernel_boot_has_ended(void);

bool rcu_is_watching(void);

bool __rcu_is_watching(void);

#ifndef CONFIG_PREEMPTION

void rcu_all_qs(void);

#endif

kernel/entry/common.c

+1 −1
Original line number Diff line number Diff line
@@ -278,7 +278,7 @@ noinstr irqentry_state_t irqentry_enter(struct pt_regs *regs) 
	 * terminate a grace period, if and only if the timer interrupt is

	 * not nested into another interrupt.

	 *

	 * Checking for __rcu_is_watching() here would prevent the nesting

	 * Checking for rcu_is_watching() here would prevent the nesting

	 * interrupt to invoke rcu_irq_enter(). If that nested interrupt is

	 * the tick then rcu_flavor_sched_clock_irq() would wrongfully

	 * assume that it is the first interupt and eventually claim

kernel/rcu/tree.c

+0 −5
Original line number Diff line number Diff line
@@ -1077,11 +1077,6 @@ static void rcu_disable_urgency_upon_qs(struct rcu_data *rdp) 
	}

}



noinstr bool __rcu_is_watching(void)

{

	return !rcu_dynticks_curr_cpu_in_eqs();

}



/**

 * rcu_is_watching - see if RCU thinks that the current CPU is not idle

 *

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