[PATCH] x86/mm/pat: fix kernel-doc warning

[Kunwu Chan]

Fix kernel-doc warning in memtype.c:
arch/x86/mm/pat/memtype.c:710: warning: Function parameter or struct member 'pfn' not described in 'pat_pfn_immune_to_uc_mtrr'

Signed-off-by: Kunwu Chan <chentao@xxxxxxxxxx>
---
 arch/x86/mm/pat/memtype.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/mm/pat/memtype.c b/arch/x86/mm/pat/memtype.c
index 0904d7e8e126..77c86a575268 100644
--- a/arch/x86/mm/pat/memtype.c
+++ b/arch/x86/mm/pat/memtype.c
@@ -700,6 +700,7 @@ static enum page_cache_mode lookup_memtype(u64 paddr)
 /**
  * pat_pfn_immune_to_uc_mtrr - Check whether the PAT memory type
  * of @pfn cannot be overridden by UC MTRR memory type.
+ * @pfn:  the page frame number to check
  *
  * Only to be called when PAT is enabled.
  *
-- 
2.39.2