github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-09-14 16:10:02 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

lib/test_hmm: fix garbage pfn and wrong direction in devmem fault debug

Browse Source 
Move pr_debug() inside the `if (dpage)` block to avoid printing garbage
pfn for NULL dpage, and correct the direction label from "sys to dev" to
"dev to sys".

Link: https://lore.kernel.org/20260812092856.55296-1-liuqiangneo@163.com
Signed-off-by: Qiang Liu <liuqiang@kylinos.cn>
Assisted-by: Qoder:Qwen-3.8-MAX-Preview
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Qiang Liu 2026-08-12 17:28:56 +08:00 committed by Andrew Morton
parent f525001b33
commit 0d0878fd7c
1 changed files with 2 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
lib/test_hmm.c
View File

@ -1151,10 +1151,9 @@ static vm_fault_t dmirror_devmem_fault_alloc_and_copy(struct migrate_vma *args,
if (!dpage && !order)
return VM_FAULT_OOM;
pr_debug("migrating from sys to dev pfn src: 0x%lx pfn dst: 0x%lx\n",
page_to_pfn(spage), page_to_pfn(dpage));
if (dpage) {
pr_debug("migrating from dev to sys pfn src: 0x%lx pfn dst: 0x%lx\n",
page_to_pfn(spage), page_to_pfn(dpage));
lock_page(dpage);
*dst |= migrate_pfn(page_to_pfn(dpage));
}