linux-kernel - [PATCH v2 2/5] mmu_notifiers: Fixup comment in mmu_interval_read

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Message-Id: <06fa82756e4d6458895962a7743cc7f162658a54.1689768831.git-series.apopple@nvidia.com>
Date:   Wed, 19 Jul 2023 22:18:43 +1000
From:   Alistair Popple <apopple@...dia.com>
To:     akpm@...ux-foundation.org
Cc:     ajd@...ux.ibm.com, catalin.marinas@....com, fbarrat@...ux.ibm.com,
        iommu@...ts.linux.dev, jgg@...pe.ca, jhubbard@...dia.com,
        kevin.tian@...el.com, kvm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, linuxppc-dev@...ts.ozlabs.org,
        mpe@...erman.id.au, nicolinc@...dia.com, npiggin@...il.com,
        robin.murphy@....com, seanjc@...gle.com, will@...nel.org,
        x86@...nel.org, zhi.wang.linux@...il.com,
        Alistair Popple <apopple@...dia.com>
Subject: [PATCH v2 2/5] mmu_notifiers: Fixup comment in mmu_interval_read_begin()

The comment in mmu_interval_read_begin() refers to a function that
doesn't exist and uses the wrong call-back name. The op for mmu
interval notifiers is mmu_interval_notifier_ops->invalidate() so fix
the comment up to reflect that.

Signed-off-by: Alistair Popple <apopple@...dia.com>
---
 mm/mmu_notifier.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/mmu_notifier.c b/mm/mmu_notifier.c
index 50c0dde..b7ad155 100644
--- a/mm/mmu_notifier.c
+++ b/mm/mmu_notifier.c
@@ -199,7 +199,7 @@ mmu_interval_read_begin(struct mmu_interval_notifier *interval_sub)
 	 * invalidate_start/end and is colliding.
 	 *
 	 * The locking looks broadly like this:
-	 *   mn_tree_invalidate_start():          mmu_interval_read_begin():
+	 *   mn_itree_inv_start():                 mmu_interval_read_begin():
 	 *                                         spin_lock
 	 *                                          seq = READ_ONCE(interval_sub->invalidate_seq);
 	 *                                          seq == subs->invalidate_seq
@@ -207,7 +207,7 @@ mmu_interval_read_begin(struct mmu_interval_notifier *interval_sub)
 	 *    spin_lock
 	 *     seq = ++subscriptions->invalidate_seq
 	 *    spin_unlock
-	 *     op->invalidate_range():
+	 *     op->invalidate():
 	 *       user_lock
 	 *        mmu_interval_set_seq()
 	 *         interval_sub->invalidate_seq = seq
-- 
git-series 0.9.1