| Message ID | 20220915083824.766645-1-zengheng4@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [-next] rcu: remove unused 'cpu' in rcu_virt_note_context_switch | expand |
Hi, On 9/15/2022 2:08 PM, Zeng Heng wrote: > Remove unused function argument, and there is > no logic changes. > > Signed-off-by: Zeng Heng <zengheng4@huawei.com> > --- > include/linux/kvm_host.h | 2 +- > include/linux/rcutiny.h | 2 +- > include/linux/rcutree.h | 2 +- > 3 files changed, 3 insertions(+), 3 deletions(-) > > diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h > index f4519d3689e1..9cf0c503daf5 100644 > --- a/include/linux/kvm_host.h > +++ b/include/linux/kvm_host.h > @@ -417,7 +417,7 @@ static __always_inline void guest_context_enter_irqoff(void) > */ > if (!context_tracking_guest_enter()) { > instrumentation_begin(); > - rcu_virt_note_context_switch(smp_processor_id()); > + rcu_virt_note_context_switch(); > instrumentation_end(); > } > } > diff --git a/include/linux/rcutiny.h b/include/linux/rcutiny.h > index 768196a5f39d..9bc025aa79a3 100644 > --- a/include/linux/rcutiny.h > +++ b/include/linux/rcutiny.h > @@ -142,7 +142,7 @@ static inline int rcu_needs_cpu(void) > * Take advantage of the fact that there is only one CPU, which > * allows us to ignore virtualization-based context switches. > */ > -static inline void rcu_virt_note_context_switch(int cpu) { } > +static inline void rcu_virt_note_context_switch(void) { } > static inline void rcu_cpu_stall_reset(void) { } > static inline int rcu_jiffies_till_stall_check(void) { return 21 * HZ; } > static inline void rcu_irq_exit_check_preempt(void) { } > diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h > index 5efb51486e8a..70795386b9ff 100644 > --- a/include/linux/rcutree.h > +++ b/include/linux/rcutree.h > @@ -27,7 +27,7 @@ void rcu_cpu_stall_reset(void); > * wrapper around rcu_note_context_switch(), which allows TINY_RCU > * to save a few bytes. The caller must have disabled interrupts. > */ > -static inline void rcu_virt_note_context_switch(int cpu) > +static inline void rcu_virt_note_context_switch(void) > { > rcu_note_context_switch(false); > } Good catch. Acked-by: Mukesh Ojha <quic_mojha@quicinc.com> -Mukesh
On Thu, Sep 15, 2022 at 02:10:43PM +0530, Mukesh Ojha wrote: > Hi, > > On 9/15/2022 2:08 PM, Zeng Heng wrote: > > Remove unused function argument, and there is > > no logic changes. > > > > Signed-off-by: Zeng Heng <zengheng4@huawei.com> > > --- > > include/linux/kvm_host.h | 2 +- > > include/linux/rcutiny.h | 2 +- > > include/linux/rcutree.h | 2 +- > > 3 files changed, 3 insertions(+), 3 deletions(-) > > > > diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h > > index f4519d3689e1..9cf0c503daf5 100644 > > --- a/include/linux/kvm_host.h > > +++ b/include/linux/kvm_host.h > > @@ -417,7 +417,7 @@ static __always_inline void guest_context_enter_irqoff(void) > > */ > > if (!context_tracking_guest_enter()) { > > instrumentation_begin(); > > - rcu_virt_note_context_switch(smp_processor_id()); > > + rcu_virt_note_context_switch(); > > instrumentation_end(); > > } > > } > > diff --git a/include/linux/rcutiny.h b/include/linux/rcutiny.h > > index 768196a5f39d..9bc025aa79a3 100644 > > --- a/include/linux/rcutiny.h > > +++ b/include/linux/rcutiny.h > > @@ -142,7 +142,7 @@ static inline int rcu_needs_cpu(void) > > * Take advantage of the fact that there is only one CPU, which > > * allows us to ignore virtualization-based context switches. > > */ > > -static inline void rcu_virt_note_context_switch(int cpu) { } > > +static inline void rcu_virt_note_context_switch(void) { } > > static inline void rcu_cpu_stall_reset(void) { } > > static inline int rcu_jiffies_till_stall_check(void) { return 21 * HZ; } > > static inline void rcu_irq_exit_check_preempt(void) { } > > diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h > > index 5efb51486e8a..70795386b9ff 100644 > > --- a/include/linux/rcutree.h > > +++ b/include/linux/rcutree.h > > @@ -27,7 +27,7 @@ void rcu_cpu_stall_reset(void); > > * wrapper around rcu_note_context_switch(), which allows TINY_RCU > > * to save a few bytes. The caller must have disabled interrupts. > > */ > > -static inline void rcu_virt_note_context_switch(int cpu) > > +static inline void rcu_virt_note_context_switch(void) > > { > > rcu_note_context_switch(false); > > } > > Good catch. > > Acked-by: Mukesh Ojha <quic_mojha@quicinc.com> Applied for further review and testing. Thank you both! Thanx, Paul
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index f4519d3689e1..9cf0c503daf5 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -417,7 +417,7 @@ static __always_inline void guest_context_enter_irqoff(void) */ if (!context_tracking_guest_enter()) { instrumentation_begin(); - rcu_virt_note_context_switch(smp_processor_id()); + rcu_virt_note_context_switch(); instrumentation_end(); } } diff --git a/include/linux/rcutiny.h b/include/linux/rcutiny.h index 768196a5f39d..9bc025aa79a3 100644 --- a/include/linux/rcutiny.h +++ b/include/linux/rcutiny.h @@ -142,7 +142,7 @@ static inline int rcu_needs_cpu(void) * Take advantage of the fact that there is only one CPU, which * allows us to ignore virtualization-based context switches. */ -static inline void rcu_virt_note_context_switch(int cpu) { } +static inline void rcu_virt_note_context_switch(void) { } static inline void rcu_cpu_stall_reset(void) { } static inline int rcu_jiffies_till_stall_check(void) { return 21 * HZ; } static inline void rcu_irq_exit_check_preempt(void) { } diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h index 5efb51486e8a..70795386b9ff 100644 --- a/include/linux/rcutree.h +++ b/include/linux/rcutree.h @@ -27,7 +27,7 @@ void rcu_cpu_stall_reset(void); * wrapper around rcu_note_context_switch(), which allows TINY_RCU * to save a few bytes. The caller must have disabled interrupts. */ -static inline void rcu_virt_note_context_switch(int cpu) +static inline void rcu_virt_note_context_switch(void) { rcu_note_context_switch(false); }
Remove unused function argument, and there is no logic changes. Signed-off-by: Zeng Heng <zengheng4@huawei.com> --- include/linux/kvm_host.h | 2 +- include/linux/rcutiny.h | 2 +- include/linux/rcutree.h | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-)