Re: [PATCH] mm: use pgprot_val to get value of pgprot

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On 2022/4/25 18:29, Anshuman Khandual wrote:
Should have added 'memory_hotplug' in the subject line. Otherwise
this does not specify where the change is (neither does the commit
message below).

mm/memory_hotplug: use pgprot_val to get value of pgprot


$ git grep "pgprot\.pgprot"
arch/ia64/mm/init.c:    if (WARN_ON_ONCE(params->pgprot.pgprot != PAGE_KERNEL.pgprot)) arch/s390/mm/init.c:    if (WARN_ON_ONCE(params->pgprot.pgprot != PAGE_KERNEL.pgprot)) arch/sh/mm/init.c:      if (WARN_ON_ONCE(params->pgprot.pgprot != PAGE_KERNEL.pgprot))
mm/memory_hotplug.c:    if (WARN_ON_ONCE(!params->pgprot.pgprot))

You can change other's codes too.


On 4/25/22 13:47, liusongtang wrote:
pgprot.pgprot is a non-portable code, it should be replaced by
portable macro pgprot_val.

Signed-off-by: liusongtang <liusongtang@xxxxxxxxxx>
---
  mm/memory_hotplug.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 416b38c..bf7d181 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -303,7 +303,7 @@ int __ref __add_pages(int nid, unsigned long pfn, unsigned long nr_pages,
  	int err;
  	struct vmem_altmap *altmap = params->altmap;
- if (WARN_ON_ONCE(!params->pgprot.pgprot))
+	if (WARN_ON_ONCE(!pgprot_val(params->pgprot)))
  		return -EINVAL;
VM_BUG_ON(!mhp_range_allowed(PFN_PHYS(pfn), nr_pages * PAGE_SIZE, false));
Otherwise LGTM.

Reviewed-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>

.




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