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Subject[PATCH 4/5] mm/vmalloc: Add code comment for find_vmap_area_exceed_addr()
Date
Its behaviour is like find_vma() which finds an area above the specified
address, add comment to make it easier to understand.

And also fix two places of grammer mistake/typo.

Signed-off-by: Baoquan He <bhe@redhat.com>
---
mm/vmalloc.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 11dfc897de40..860ed9986775 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -790,6 +790,7 @@ unsigned long vmalloc_nr_pages(void)
return atomic_long_read(&nr_vmalloc_pages);
}

+/* Look up the first VA which satisfies addr < va_end, NULL if none. */
static struct vmap_area *find_vmap_area_exceed_addr(unsigned long addr)
{
struct vmap_area *va = NULL;
@@ -929,7 +930,7 @@ link_va(struct vmap_area *va, struct rb_root *root,
* Some explanation here. Just perform simple insertion
* to the tree. We do not set va->subtree_max_size to
* its current size before calling rb_insert_augmented().
- * It is because of we populate the tree from the bottom
+ * It is because we populate the tree from the bottom
* to parent levels when the node _is_ in the tree.
*
* Therefore we set subtree_max_size to zero after insertion,
@@ -1659,7 +1660,7 @@ static atomic_long_t vmap_lazy_nr = ATOMIC_LONG_INIT(0);

/*
* Serialize vmap purging. There is no actual critical section protected
- * by this look, but we want to avoid concurrent calls for performance
+ * by this lock, but we want to avoid concurrent calls for performance
* reasons and to make the pcpu_get_vm_areas more deterministic.
*/
static DEFINE_MUTEX(vmap_purge_lock);
--
2.34.1
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