[112/192] arch/m68k/kernel/sys_m68k: use vma_lookup() in sys_cacheflush()

Commit Message

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

From: Liam Howlett <[e-mail]>
Subject: arch/m68k/kernel/sys_m68k: use vma_lookup() in sys_cacheflush()

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]>
Acked-by: Geert Uytterhoeven <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
---

 arch/m68k/kernel/sys_m68k.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Patch

--- a/arch/m68k/kernel/sys_m68k.c~arch-m68k-kernel-sys_m68k-use-vma_lookup-in-sys_cacheflush
+++ a/arch/m68k/kernel/sys_m68k.c
@@ -402,8 +402,8 @@  sys_cacheflush (unsigned long addr, int
 		 * to this process.
 		 */
 		mmap_read_lock(current->mm);
-		vma = find_vma(current->mm, addr);
-		if (!vma || addr < vma->vm_start || addr + len > vma->vm_end)
+		vma = vma_lookup(current->mm, addr);
+		if (!vma || addr + len > vma->vm_end)
 			goto out_unlock;
 	}