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authorLiam R. Howlett <Liam.Howlett@Oracle.com>2022-09-06 22:48:49 +0300
committerAndrew Morton <akpm@linux-foundation.org>2022-09-27 05:46:16 +0300
commit7ccf089b262be2c7f2cdc6c08412a1939a812102 (patch)
treede2ce896efffc76006e50ad3bcb7619886111616 /drivers/xen/privcmd.c
parent3b0e81a1cdc9afbddb0543d08e38edb4e33c4baf (diff)
downloadlinux-7ccf089b262be2c7f2cdc6c08412a1939a812102.tar.xz
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/20220906194824.2110408-20-Liam.Howlett@oracle.com Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Tested-by: Yu Zhao <yuzhao@google.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: David Hildenbrand <david@redhat.com> Cc: David Howells <dhowells@redhat.com> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org> Cc: SeongJae Park <sj@kernel.org> Cc: Sven Schnelle <svens@linux.ibm.com> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'drivers/xen/privcmd.c')
-rw-r--r--drivers/xen/privcmd.c2
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)