[107/192] arch/arc/kernel/troubleshoot: use vma_lookup() instead of find_vma()

Commit Message

Andrew Morton June 29, 2021, 2:38 a.m. UTC

From: Liam Howlett <[e-mail]>
Subject: arch/arc/kernel/troubleshoot: use vma_lookup() instead of 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]>
---

 arch/arc/kernel/troubleshoot.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

Patch

--- a/arch/arc/kernel/troubleshoot.c~arch-arc-kernel-troubleshoot-use-vma_lookup-instead-of-find_vma
+++ a/arch/arc/kernel/troubleshoot.c
@@ -83,12 +83,12 @@  static void show_faulting_vma(unsigned l
 	 * non-inclusive vma
 	 */
 	mmap_read_lock(active_mm);
-	vma = find_vma(active_mm, address);
+	vma = vma_lookup(active_mm, address);
 
-	/* check against the find_vma( ) behaviour which returns the next VMA
-	 * if the container VMA is not found
+	/* Lookup the vma at the address and report if the container VMA is not
+	 * found
 	 */
-	if (vma && (vma->vm_start <= address)) {
+	if (vma) {
 		char buf[ARC_PATH_MAX];
 		char *nm = "?";