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authorLinus Torvalds <torvalds@linux-foundation.org>2021-04-28 22:00:13 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2021-04-28 22:00:13 +0300
commit9a45da9270b64b14e154093c28f746d861ab8c61 (patch)
treebbe75582da2e9d5f9cce4bc39a6cc32fcc171ee1 /include/linux
parent68a32ba14177d4a21c4a9a941cf1d7aea86d436f (diff)
parent120b566d1df22a0a4543ac0e8aef875c49dd2c21 (diff)
downloadlinux-9a45da9270b64b14e154093c28f746d861ab8c61.tar.xz
Merge tag 'core-rcu-2021-04-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RCU updates from Ingo Molnar: - Support for "N" as alias for last bit in bitmap parsing library (eg using syntax like "nohz_full=2-N") - kvfree_rcu updates - mm_dump_obj() updates. (One of these is to mm, but was suggested by Andrew Morton.) - RCU callback offloading update - Polling RCU grace-period interfaces - Realtime-related RCU updates - Tasks-RCU updates - Torture-test updates - Torture-test scripting updates - Miscellaneous fixes * tag 'core-rcu-2021-04-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (77 commits) rcutorture: Test start_poll_synchronize_rcu() and poll_state_synchronize_rcu() rcu: Provide polling interfaces for Tiny RCU grace periods torture: Fix kvm.sh --datestamp regex check torture: Consolidate qemu-cmd duration editing into kvm-transform.sh torture: Print proper vmlinux path for kvm-again.sh runs torture: Make TORTURE_TRUST_MAKE available in kvm-again.sh environment torture: Make kvm-transform.sh update jitter commands torture: Add --duration argument to kvm-again.sh torture: Add kvm-again.sh to rerun a previous torture-test torture: Create a "batches" file for build reuse torture: De-capitalize TORTURE_SUITE torture: Make upper-case-only no-dot no-slash scenario names official torture: Rename SRCU-t and SRCU-u to avoid lowercase characters torture: Remove no-mpstat error message torture: Record kvm-test-1-run.sh and kvm-test-1-run-qemu.sh PIDs torture: Record jitter start/stop commands torture: Extract kvm-test-1-run-qemu.sh from kvm-test-1-run.sh torture: Record TORTURE_KCONFIG_GDB_ARG in qemu-cmd torture: Abstract jitter.sh start/stop into scripts rcu: Provide polling interfaces for Tree RCU grace periods ...
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/mm.h4
-rw-r--r--include/linux/rcu_segcblist.h7
-rw-r--r--include/linux/rculist_nulls.h2
-rw-r--r--include/linux/rcupdate.h2
-rw-r--r--include/linux/rcutiny.h7
-rw-r--r--include/linux/rcutree.h2
-rw-r--r--include/linux/slab.h2
-rw-r--r--include/linux/vmalloc.h2
8 files changed, 18 insertions, 10 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 06094627f1c1..21115933b9b8 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -3180,7 +3180,11 @@ unsigned long wp_shared_mapping_range(struct address_space *mapping,
extern int sysctl_nr_trim_pages;
+#ifdef CONFIG_PRINTK
void mem_dump_obj(void *object);
+#else
+static inline void mem_dump_obj(void *object) {}
+#endif
#endif /* __KERNEL__ */
#endif /* _LINUX_MM_H */
diff --git a/include/linux/rcu_segcblist.h b/include/linux/rcu_segcblist.h
index 8afe886e85f1..3db96c4f45fd 100644
--- a/include/linux/rcu_segcblist.h
+++ b/include/linux/rcu_segcblist.h
@@ -109,7 +109,7 @@ struct rcu_cblist {
* | SEGCBLIST_KTHREAD_GP |
* | |
* | Kthreads handle callbacks holding nocb_lock, local rcu_core() stops |
- * | handling callbacks. |
+ * | handling callbacks. Enable bypass queueing. |
* ----------------------------------------------------------------------------
*/
@@ -125,7 +125,7 @@ struct rcu_cblist {
* | SEGCBLIST_KTHREAD_GP |
* | |
* | CB/GP kthreads handle callbacks holding nocb_lock, local rcu_core() |
- * | ignores callbacks. |
+ * | ignores callbacks. Bypass enqueue is enabled. |
* ----------------------------------------------------------------------------
* |
* v
@@ -134,7 +134,8 @@ struct rcu_cblist {
* | SEGCBLIST_KTHREAD_GP |
* | |
* | CB/GP kthreads and local rcu_core() handle callbacks concurrently |
- * | holding nocb_lock. Wake up CB and GP kthreads if necessary. |
+ * | holding nocb_lock. Wake up CB and GP kthreads if necessary. Disable |
+ * | bypass enqueue. |
* ----------------------------------------------------------------------------
* |
* v
diff --git a/include/linux/rculist_nulls.h b/include/linux/rculist_nulls.h
index ff3e94779e73..d8afdb8784c1 100644
--- a/include/linux/rculist_nulls.h
+++ b/include/linux/rculist_nulls.h
@@ -161,7 +161,7 @@ static inline void hlist_nulls_add_fake(struct hlist_nulls_node *n)
*
* The barrier() is needed to make sure compiler doesn't cache first element [1],
* as this loop can be restarted [2]
- * [1] Documentation/core-api/atomic_ops.rst around line 114
+ * [1] Documentation/memory-barriers.txt around line 1533
* [2] Documentation/RCU/rculist_nulls.rst around line 146
*/
#define hlist_nulls_for_each_entry_rcu(tpos, pos, head, member) \
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index 6d855ef091ba..9455476c5ba2 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -882,7 +882,7 @@ static inline notrace void rcu_read_unlock_sched_notrace(void)
* The BUILD_BUG_ON check must not involve any function calls, hence the
* checks are done in macros here.
*/
-#define kfree_rcu kvfree_rcu
+#define kfree_rcu(ptr, rhf...) kvfree_rcu(ptr, ## rhf)
/**
* kvfree_rcu() - kvfree an object after a grace period.
diff --git a/include/linux/rcutiny.h b/include/linux/rcutiny.h
index 2a97334eb786..35e0be326ffc 100644
--- a/include/linux/rcutiny.h
+++ b/include/linux/rcutiny.h
@@ -17,10 +17,9 @@
/* Never flag non-existent other CPUs! */
static inline bool rcu_eqs_special_set(int cpu) { return false; }
-static inline unsigned long get_state_synchronize_rcu(void)
-{
- return 0;
-}
+unsigned long get_state_synchronize_rcu(void);
+unsigned long start_poll_synchronize_rcu(void);
+bool poll_state_synchronize_rcu(unsigned long oldstate);
static inline void cond_synchronize_rcu(unsigned long oldstate)
{
diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h
index df578b73960f..b89b54130f49 100644
--- a/include/linux/rcutree.h
+++ b/include/linux/rcutree.h
@@ -41,6 +41,8 @@ void rcu_momentary_dyntick_idle(void);
void kfree_rcu_scheduler_running(void);
bool rcu_gp_might_be_stalled(void);
unsigned long get_state_synchronize_rcu(void);
+unsigned long start_poll_synchronize_rcu(void);
+bool poll_state_synchronize_rcu(unsigned long oldstate);
void cond_synchronize_rcu(unsigned long oldstate);
void rcu_idle_enter(void);
diff --git a/include/linux/slab.h b/include/linux/slab.h
index 7ae604076767..0c97d788762c 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -186,8 +186,10 @@ void kfree(const void *);
void kfree_sensitive(const void *);
size_t __ksize(const void *);
size_t ksize(const void *);
+#ifdef CONFIG_PRINTK
bool kmem_valid_obj(void *object);
void kmem_dump_obj(void *object);
+#endif
#ifdef CONFIG_HAVE_HARDENED_USERCOPY_ALLOCATOR
void __check_heap_object(const void *ptr, unsigned long n, struct page *page,
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index df92211cf771..3de7be6dd17c 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -241,7 +241,7 @@ pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms)
int register_vmap_purge_notifier(struct notifier_block *nb);
int unregister_vmap_purge_notifier(struct notifier_block *nb);
-#ifdef CONFIG_MMU
+#if defined(CONFIG_MMU) && defined(CONFIG_PRINTK)
bool vmalloc_dump_obj(void *object);
#else
static inline bool vmalloc_dump_obj(void *object) { return false; }