[119/192] misc/sgi-gru/grufault: use vma_lookup() in gru_find_vma()

Commit Message

Andrew Morton June 29, 2021, 2:39 a.m. UTC

From: Liam Howlett <[e-mail]>
Subject: misc/sgi-gru/grufault: use vma_lookup() in gru_find_vma()

Use vma_lookup() to find the VMA at a specific address.  As vma_lookup()
will return NULL if the address is not within any VMA, the start address
no longer needs to be validated.

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Liam R. Howlett <[e-mail]>
Reviewed-by: Laurent Dufour <[e-mail]>
Acked-by: David Hildenbrand <[e-mail]>
Acked-by: Davidlohr Bueso <[e-mail]>
Cc: Geert Uytterhoeven <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
---

 drivers/misc/sgi-gru/grufault.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Patch

--- a/drivers/misc/sgi-gru/grufault.c~misc-sgi-gru-grufault-use-vma_lookup-in-gru_find_vma
+++ a/drivers/misc/sgi-gru/grufault.c
@@ -49,8 +49,8 @@  struct vm_area_struct *gru_find_vma(unsi
 {
 	struct vm_area_struct *vma;
 
-	vma = find_vma(current->mm, vaddr);
-	if (vma && vma->vm_start <= vaddr && vma->vm_ops == &gru_vm_ops)
+	vma = vma_lookup(current->mm, vaddr);
+	if (vma && vma->vm_ops == &gru_vm_ops)
 		return vma;
 	return NULL;
 }