On 2021/2/10 下午9:33, Christoph Hellwig wrote:
+extern int mf_dax_mapping_kill_procs(struct address_space *mapping, pgoff_t index, int flags);
No nee for the extern, please avoid the overly long line.
OK.
I'd like to confirm one thing... I have checked all of this patchset by
checkpatch.pl and it did not report the overly long line warning. So, I
should still obey the rule of 80 chars one line?
@@ -120,6 +121,13 @@ static int hwpoison_filter_dev(struct page *p)
if (PageSlab(p))
return -EINVAL;
+ if (pfn_valid(page_to_pfn(p))) {
+ if (is_device_fsdax_page(p))
+ return 0;
+ else
+ return -EINVAL;
+ }
+
This looks odd. For one there is no need for an else after a return.
But more importantly page_mapping() as called below pretty much assumes
a valid PFN, so something is fishy in this function.
Yes, a mistake here. I'll fix it.
+ if (is_zone_device_page(p)) {
+ if (is_device_fsdax_page(p))
+ tk->addr = vma->vm_start +
+ ((pgoff - vma->vm_pgoff) << PAGE_SHIFT);
The arithmetics here scream for a common helper, I suspect there might
be other places that could use the same helper.
+int mf_dax_mapping_kill_procs(struct address_space *mapping, pgoff_t index, int flags)
Overly long line. Also the naming scheme with the mf_ seems rather
unusual. Maybe dax_kill_mapping_procs? Also please add a kerneldoc
comment describing the function given that it exported.
OK. Thanks for your guidance.
--
Thanks,
Ruan Shiyang.
