From: Liam Howlett <liam.howlett@xxxxxxxxxx> 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/20210521174745.2219620-9-Liam.Howlett@xxxxxxxxxx Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx> Reviewed-by: Laurent Dufour <ldufour@xxxxxxxxxxxxx> Acked-by: David Hildenbrand <david@xxxxxxxxxx> Acked-by: Davidlohr Bueso <dbueso@xxxxxxx> Acked-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- arch/m68k/kernel/sys_m68k.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- 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; } _
