Message-Id: <20230223052851.1054799-1-jun.miao@intel.com>
Date:   Thu, 23 Feb 2023 13:28:51 +0800
From:   Jun Miao <jun.miao@...el.com>
To:     pbonzini@...hat.com, seanjc@...gle.com
Cc:     kvm@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, jun.miao@...el.com
Subject: [PATCH v2] KVM: Fix comments that refer to the non-existent install_new_memslots()

The function of install_new_memslots() was replaced by kvm_swap_active_memslots().
In order to avoid confusion, fix the comments that refer the non-existent name of
install_new_memslots which always be ignored.

Fixes: a54d806688fe ("KVM: Keep memslots in tree-based structures instead of array-based ones")
Signed-off-by: Jun Miao <jun.miao@...el.com>
---
 Documentation/virt/kvm/locking.rst |  2 +-
 include/linux/kvm_host.h           |  4 ++--
 virt/kvm/kvm_main.c                | 10 +++++-----
 3 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/Documentation/virt/kvm/locking.rst b/Documentation/virt/kvm/locking.rst
index 14c4e9fa501d..6e03ad853c27 100644
--- a/Documentation/virt/kvm/locking.rst
+++ b/Documentation/virt/kvm/locking.rst
@@ -21,7 +21,7 @@ The acquisition orders for mutexes are as follows:
 - kvm->mn_active_invalidate_count ensures that pairs of
   invalidate_range_start() and invalidate_range_end() callbacks
   use the same memslots array.  kvm->slots_lock and kvm->slots_arch_lock
-  are taken on the waiting side in install_new_memslots, so MMU notifiers
+  are taken on the waiting side in kvm_swap_active_memslots(), so MMU notifiers
   must not take either kvm->slots_lock or kvm->slots_arch_lock.
 
 For SRCU:
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 8ada23756b0e..98605bd25060 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -58,7 +58,7 @@
 
 /*
  * Bit 63 of the memslot generation number is an "update in-progress flag",
- * e.g. is temporarily set for the duration of install_new_memslots().
+ * e.g. is temporarily set for the duration of kvm_swap_active_memslots().
  * This flag effectively creates a unique generation number that is used to
  * mark cached memslot data, e.g. MMIO accesses, as potentially being stale,
  * i.e. may (or may not) have come from the previous memslots generation.
@@ -713,7 +713,7 @@ struct kvm {
 	 * use by the VM. To be used under the slots_lock (above) or in a
 	 * kvm->srcu critical section where acquiring the slots_lock would
 	 * lead to deadlock with the synchronize_srcu in
-	 * install_new_memslots.
+	 * kvm_swap_active_memslots().
 	 */
 	struct mutex slots_arch_lock;
 	struct mm_struct *mm; /* userspace tied to this vm */
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index d255964ec331..9f9077a898dc 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1298,7 +1298,7 @@ static void kvm_destroy_vm(struct kvm *kvm)
 	 * At this point, pending calls to invalidate_range_start()
 	 * have completed but no more MMU notifiers will run, so
 	 * mn_active_invalidate_count may remain unbalanced.
-	 * No threads can be waiting in install_new_memslots as the
+	 * No threads can be waiting in kvm_swap_active_memslots() as the
 	 * last reference on KVM has been dropped, but freeing
 	 * memslots would deadlock without this manual intervention.
 	 */
@@ -1742,13 +1742,13 @@ static void kvm_invalidate_memslot(struct kvm *kvm,
 	kvm_arch_flush_shadow_memslot(kvm, old);
 	kvm_arch_guest_memory_reclaimed(kvm);
 
-	/* Was released by kvm_swap_active_memslots, reacquire. */
+	/* Was released by kvm_swap_active_memslots(), reacquire. */
 	mutex_lock(&kvm->slots_arch_lock);
 
 	/*
 	 * Copy the arch-specific field of the newly-installed slot back to the
 	 * old slot as the arch data could have changed between releasing
-	 * slots_arch_lock in install_new_memslots() and re-acquiring the lock
+	 * slots_arch_lock in kvm_swap_active_memslots() and re-acquiring the lock
 	 * above.  Writers are required to retrieve memslots *after* acquiring
 	 * slots_arch_lock, thus the active slot's data is guaranteed to be fresh.
 	 */
@@ -1810,11 +1810,11 @@ static int kvm_set_memslot(struct kvm *kvm,
 	int r;
 
 	/*
-	 * Released in kvm_swap_active_memslots.
+	 * Released in kvm_swap_active_memslots().
 	 *
 	 * Must be held from before the current memslots are copied until
 	 * after the new memslots are installed with rcu_assign_pointer,
-	 * then released before the synchronize srcu in kvm_swap_active_memslots.
+	 * then released before the synchronize srcu in kvm_swap_active_memslots().
 	 *
 	 * When modifying memslots outside of the slots_lock, must be held
 	 * before reading the pointer to the current memslots until after all
-- 
2.32.0

Powered by blists - more mailing lists