[RFC V3 2/8] mm: Stop using pxd_ERROR()

[Anshuman Khandual]

pxd_ERROR() has been used in generic mm just to print the page table entry
in pxd_clear_bad() before clearing those out with pxd_clear() later. These
pxd_ERROR() macros have been provided by all platforms which basically did
the same thing.

Make pxd_clear_bad() use recently added ptval_to_str() instead for printing
page table entries thus completely dropping dependency on platform provided
pxd_ERROR() macros which can then be dropped off later on.

Cc: Andrew Morton <akpm at linux-foundation.org>
Cc: David Hildenbrand <david at kernel.org>
Cc: Lorenzo Stoakes <ljs at kernel.org>
Cc: linux-mm at kvack.org
Cc: linux-kernel at vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual at arm.com>
---
 mm/pgtable-generic.c | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/mm/pgtable-generic.c b/mm/pgtable-generic.c
index b91b1a98029c..f093e2474f4f 100644
--- a/mm/pgtable-generic.c
+++ b/mm/pgtable-generic.c
@@ -13,6 +13,7 @@
 #include <linux/swap.h>
 #include <linux/swapops.h>
 #include <linux/mm_inline.h>
+#include <linux/mm_types.h>
 #include <linux/iommu.h>
 #include <linux/pgalloc.h>
 
@@ -26,14 +27,20 @@
 
 void pgd_clear_bad(pgd_t *pgd)
 {
-	pgd_ERROR(*pgd);
+	char str[PTVAL_STR_MAX];
+
+	ptval_to_str(str, pgd_val(*pgd));
+	pr_err("bad pgd %s.\n", str);
 	pgd_clear(pgd);
 }
 
 #ifndef __PAGETABLE_P4D_FOLDED
 void p4d_clear_bad(p4d_t *p4d)
 {
-	p4d_ERROR(*p4d);
+	char str[PTVAL_STR_MAX];
+
+	ptval_to_str(str, p4d_val(*p4d));
+	pr_err("bad p4d %s.\n", str);
 	p4d_clear(p4d);
 }
 #endif
@@ -41,7 +48,10 @@ void p4d_clear_bad(p4d_t *p4d)
 #ifndef __PAGETABLE_PUD_FOLDED
 void pud_clear_bad(pud_t *pud)
 {
-	pud_ERROR(*pud);
+	char str[PTVAL_STR_MAX];
+
+	ptval_to_str(str, pud_val(*pud));
+	pr_err("bad pud %s.\n", str);
 	pud_clear(pud);
 }
 #endif
@@ -53,7 +63,10 @@ void pud_clear_bad(pud_t *pud)
  */
 void pmd_clear_bad(pmd_t *pmd)
 {
-	pmd_ERROR(*pmd);
+	char str[PTVAL_STR_MAX];
+
+	ptval_to_str(str, pmd_val(*pmd));
+	pr_err("bad pmd %s.\n", str);
 	pmd_clear(pmd);
 }
 
-- 
2.43.0