diff options
| author | Liam R. Howlett <[email protected]> | 2022-09-06 19:48:49 +0000 |
|---|---|---|
| committer | Andrew Morton <[email protected]> | 2022-09-26 19:46:16 -0700 |
| commit | 7ccf089b262be2c7f2cdc6c08412a1939a812102 (patch) | |
| tree | de2ce896efffc76006e50ad3bcb7619886111616 | |
| parent | 3b0e81a1cdc9afbddb0543d08e38edb4e33c4baf (diff) | |
xen: use vma_lookup() in privcmd_ioctl_mmap()
vma_lookup() walks the VMA tree for a specific value, find_vma() will
search the tree after walking to a specific value. It is more efficient
to only walk to the requested value since privcmd_ioctl_mmap() will exit
the loop if vm_start != msg->va.
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Liam R. Howlett <[email protected]>
Acked-by: Vlastimil Babka <[email protected]>
Tested-by: Yu Zhao <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: David Hildenbrand <[email protected]>
Cc: David Howells <[email protected]>
Cc: Davidlohr Bueso <[email protected]>
Cc: "Matthew Wilcox (Oracle)" <[email protected]>
Cc: SeongJae Park <[email protected]>
Cc: Sven Schnelle <[email protected]>
Cc: Will Deacon <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
| -rw-r--r-- | drivers/xen/privcmd.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/xen/privcmd.c b/drivers/xen/privcmd.c index e88e8f6f0a33..fae50a24630b 100644 --- a/drivers/xen/privcmd.c +++ b/drivers/xen/privcmd.c @@ -282,7 +282,7 @@ static long privcmd_ioctl_mmap(struct file *file, void __user *udata) struct page, lru); struct privcmd_mmap_entry *msg = page_address(page); - vma = find_vma(mm, msg->va); + vma = vma_lookup(mm, msg->va); rc = -EINVAL; if (!vma || (msg->va != vma->vm_start) || vma->vm_private_data) |