From: Alexey Kardashevskiy <aik@ozlabs.ru> To: linuxppc-dev@lists.ozlabs.org Cc: Alexey Kardashevskiy <aik@ozlabs.ru>, Paul Mackerras <paulus@samba.org>, Alexander Graf <agraf@suse.com>, David Gibson <david@gibson.dropbear.id.au>, kvm-ppc@vger.kernel.org, kvm@vger.kernel.org Subject: [PATCH kernel 1/9] rcu: Define notrace version of list_for_each_entry_rcu Date: Tue, 15 Sep 2015 20:49:31 +1000 [thread overview] Message-ID: <1442314179-9706-2-git-send-email-aik@ozlabs.ru> (raw) In-Reply-To: <1442314179-9706-1-git-send-email-aik@ozlabs.ru> This defines list_for_each_entry_rcu_notrace and list_entry_rcu_notrace which use rcu_dereference_raw_notrace instead of rcu_dereference_raw. This allows using list_for_each_entry_rcu_notrace in real mode (MMU is off). Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> --- include/linux/rculist.h | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/include/linux/rculist.h b/include/linux/rculist.h index 17c6b1f..439c4d7 100644 --- a/include/linux/rculist.h +++ b/include/linux/rculist.h @@ -253,6 +253,25 @@ static inline void list_splice_init_rcu(struct list_head *list, }) /** + * list_entry_rcu_notrace - get the struct for this entry + * @ptr: the &struct list_head pointer. + * @type: the type of the struct this is embedded in. + * @member: the name of the list_struct within the struct. + * + * This primitive may safely run concurrently with the _rcu list-mutation + * primitives such as list_add_rcu() as long as it's guarded by rcu_read_lock(). + * + * This is the same as list_entry_rcu() except that it does + * not do any RCU debugging or tracing. + */ +#define list_entry_rcu_notrace(ptr, type, member) \ +({ \ + typeof(*ptr) __rcu *__ptr = (typeof(*ptr) __rcu __force *)ptr; \ + container_of((typeof(ptr))rcu_dereference_raw_notrace(__ptr), \ + type, member); \ +}) + +/** * Where are list_empty_rcu() and list_first_entry_rcu()? * * Implementing those functions following their counterparts list_empty() and @@ -308,6 +327,25 @@ static inline void list_splice_init_rcu(struct list_head *list, pos = list_entry_rcu(pos->member.next, typeof(*pos), member)) /** + * list_for_each_entry_rcu_notrace - iterate over rcu list of given type + * @pos: the type * to use as a loop cursor. + * @head: the head for your list. + * @member: the name of the list_struct within the struct. + * + * This list-traversal primitive may safely run concurrently with + * the _rcu list-mutation primitives such as list_add_rcu() + * as long as the traversal is guarded by rcu_read_lock(). + * + * This is the same as list_for_each_entry_rcu() except that it does + * not do any RCU debugging or tracing. + */ +#define list_for_each_entry_rcu_notrace(pos, head, member) \ + for (pos = list_entry_rcu_notrace((head)->next, typeof(*pos), member); \ + &pos->member != (head); \ + pos = list_entry_rcu_notrace(pos->member.next, typeof(*pos), \ + member)) + +/** * list_for_each_entry_continue_rcu - continue iteration over list of given type * @pos: the type * to use as a loop cursor. * @head: the head for your list. -- 2.4.0.rc3.8.gfb3e7d5
WARNING: multiple messages have this Message-ID (diff)
From: Alexey Kardashevskiy <aik@ozlabs.ru> To: linuxppc-dev@lists.ozlabs.org Cc: Alexey Kardashevskiy <aik@ozlabs.ru>, Paul Mackerras <paulus@samba.org>, Alexander Graf <agraf@suse.com>, David Gibson <david@gibson.dropbear.id.au>, kvm-ppc@vger.kernel.org, kvm@vger.kernel.org Subject: [PATCH kernel 1/9] rcu: Define notrace version of list_for_each_entry_rcu Date: Tue, 15 Sep 2015 10:49:31 +0000 [thread overview] Message-ID: <1442314179-9706-2-git-send-email-aik@ozlabs.ru> (raw) In-Reply-To: <1442314179-9706-1-git-send-email-aik@ozlabs.ru> This defines list_for_each_entry_rcu_notrace and list_entry_rcu_notrace which use rcu_dereference_raw_notrace instead of rcu_dereference_raw. This allows using list_for_each_entry_rcu_notrace in real mode (MMU is off). Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> --- include/linux/rculist.h | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/include/linux/rculist.h b/include/linux/rculist.h index 17c6b1f..439c4d7 100644 --- a/include/linux/rculist.h +++ b/include/linux/rculist.h @@ -253,6 +253,25 @@ static inline void list_splice_init_rcu(struct list_head *list, }) /** + * list_entry_rcu_notrace - get the struct for this entry + * @ptr: the &struct list_head pointer. + * @type: the type of the struct this is embedded in. + * @member: the name of the list_struct within the struct. + * + * This primitive may safely run concurrently with the _rcu list-mutation + * primitives such as list_add_rcu() as long as it's guarded by rcu_read_lock(). + * + * This is the same as list_entry_rcu() except that it does + * not do any RCU debugging or tracing. + */ +#define list_entry_rcu_notrace(ptr, type, member) \ +({ \ + typeof(*ptr) __rcu *__ptr = (typeof(*ptr) __rcu __force *)ptr; \ + container_of((typeof(ptr))rcu_dereference_raw_notrace(__ptr), \ + type, member); \ +}) + +/** * Where are list_empty_rcu() and list_first_entry_rcu()? * * Implementing those functions following their counterparts list_empty() and @@ -308,6 +327,25 @@ static inline void list_splice_init_rcu(struct list_head *list, pos = list_entry_rcu(pos->member.next, typeof(*pos), member)) /** + * list_for_each_entry_rcu_notrace - iterate over rcu list of given type + * @pos: the type * to use as a loop cursor. + * @head: the head for your list. + * @member: the name of the list_struct within the struct. + * + * This list-traversal primitive may safely run concurrently with + * the _rcu list-mutation primitives such as list_add_rcu() + * as long as the traversal is guarded by rcu_read_lock(). + * + * This is the same as list_for_each_entry_rcu() except that it does + * not do any RCU debugging or tracing. + */ +#define list_for_each_entry_rcu_notrace(pos, head, member) \ + for (pos = list_entry_rcu_notrace((head)->next, typeof(*pos), member); \ + &pos->member != (head); \ + pos = list_entry_rcu_notrace(pos->member.next, typeof(*pos), \ + member)) + +/** * list_for_each_entry_continue_rcu - continue iteration over list of given type * @pos: the type * to use as a loop cursor. * @head: the head for your list. -- 2.4.0.rc3.8.gfb3e7d5
next prev parent reply other threads:[~2015-09-15 10:50 UTC|newest] Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-09-15 10:49 [PATCH kernel 0/9] KVM: PPC: Add in-kernel multitce handling Alexey Kardashevskiy 2015-09-15 10:49 ` Alexey Kardashevskiy 2015-09-15 10:49 ` Alexey Kardashevskiy [this message] 2015-09-15 10:49 ` [PATCH kernel 1/9] rcu: Define notrace version of list_for_each_entry_rcu Alexey Kardashevskiy 2015-12-08 2:05 ` David Gibson 2015-12-08 2:05 ` David Gibson 2015-09-15 10:49 ` [PATCH kernel 2/9] KVM: PPC: Make real_vmalloc_addr() public Alexey Kardashevskiy 2015-09-15 10:49 ` Alexey Kardashevskiy 2015-12-08 2:08 ` David Gibson 2015-12-08 2:08 ` David Gibson 2015-09-15 10:49 ` [PATCH kernel 3/9] KVM: PPC: Rework H_PUT_TCE/H_GET_TCE handlers Alexey Kardashevskiy 2015-09-15 10:49 ` Alexey Kardashevskiy 2015-12-08 2:18 ` David Gibson 2015-12-08 2:18 ` David Gibson 2015-09-15 10:49 ` [PATCH kernel 4/9] KVM: PPC: Use RCU for arch.spapr_tce_tables Alexey Kardashevskiy 2015-09-15 10:49 ` Alexey Kardashevskiy 2015-12-08 2:35 ` David Gibson 2015-12-08 2:35 ` David Gibson 2015-09-15 10:49 ` [PATCH kernel 5/9] KVM: PPC: Account TCE-containing pages in locked_vm Alexey Kardashevskiy 2015-09-15 10:49 ` Alexey Kardashevskiy 2015-11-30 2:06 ` Paul Mackerras 2015-11-30 2:06 ` Paul Mackerras 2015-11-30 5:09 ` Alexey Kardashevskiy 2015-11-30 5:09 ` Alexey Kardashevskiy 2015-12-08 5:18 ` David Gibson 2015-12-08 5:18 ` David Gibson 2015-09-15 10:49 ` [PATCH kernel 6/9] KVM: PPC: Replace SPAPR_TCE_SHIFT with IOMMU_PAGE_SHIFT_4K Alexey Kardashevskiy 2015-09-15 10:49 ` Alexey Kardashevskiy 2015-12-08 5:19 ` David Gibson 2015-12-08 5:19 ` David Gibson 2015-09-15 10:49 ` [PATCH kernel 7/9] KVM: PPC: Move reusable bits of H_PUT_TCE handler to helpers Alexey Kardashevskiy 2015-09-15 10:49 ` Alexey Kardashevskiy 2015-12-08 5:27 ` David Gibson 2015-12-08 5:27 ` David Gibson 2015-12-22 7:24 ` Alexey Kardashevskiy 2015-12-22 7:24 ` Alexey Kardashevskiy 2015-09-15 10:49 ` [PATCH kernel 8/9] KVM: Fix KVM_SMI chapter number Alexey Kardashevskiy 2015-09-15 10:49 ` Alexey Kardashevskiy 2015-12-08 5:29 ` David Gibson 2015-12-08 5:29 ` David Gibson 2015-09-15 10:49 ` [PATCH kernel 9/9] KVM: PPC: Add support for multiple-TCE hcalls Alexey Kardashevskiy 2015-09-15 10:49 ` Alexey Kardashevskiy 2015-12-08 5:48 ` David Gibson 2015-12-08 5:48 ` David Gibson 2015-12-22 7:42 ` Alexey Kardashevskiy 2015-12-22 7:42 ` Alexey Kardashevskiy
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