[RFC V3 1/8] mm: Make ptrval_to_str() generally available

[Anshuman Khandual <anshuman.khandual@arm.com>]

Move ptrval_to_str() inside a header thus making the helper more generally
available for new users which are being added later. While here, also move
another related string size macro PTVAL_STR_MAX inside the header as well.

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: linux-mm@kvack.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
 include/linux/mm_types.h | 15 +++++++++++++++
 mm/memory.c              | 16 ++--------------
 2 files changed, 17 insertions(+), 14 deletions(-)

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index b18c2b2e7d2c..a5b514e55dd7 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -2001,4 +2001,19 @@ static inline unsigned long mmf_init_legacy_flags(unsigned long flags)
 	return flags & MMF_INIT_LEGACY_MASK;
 }
 
+void ptval_bytes_to_hex_str(char *buf, size_t buf_size, const void *entry, size_t entry_size);
+
+#define ptval_to_str(buf, val)								\
+	do {										\
+		auto __val = (val);							\
+											\
+		ptval_bytes_to_hex_str((buf), sizeof(buf), &__val, sizeof(__val));	\
+	} while (0)
+
+#if defined(__SIZEOF_INT128__)
+#define PTVAL_STR_MAX	(32 + 1) /* Max 128-bit value in hex + NUL */
+#else
+#define PTVAL_STR_MAX	(16 + 1) /* Max 64-bit value in hex + NUL */
+#endif
+
 #endif /* _LINUX_MM_TYPES_H */
diff --git a/mm/memory.c b/mm/memory.c
index 01893720b6d8..752fc04ef8ac 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -46,6 +46,7 @@
 #include <linux/sched/numa_balancing.h>
 #include <linux/sched/task.h>
 #include <linux/hugetlb.h>
+#include <linux/mm_types.h>
 #include <linux/mman.h>
 #include <linux/swap.h>
 #include <linux/highmem.h>
@@ -519,7 +520,7 @@ static bool is_bad_page_map_ratelimited(void)
 	return false;
 }
 
-static void ptval_bytes_to_hex_str(char *buf, size_t buf_size, const void *entry, size_t entry_size)
+void ptval_bytes_to_hex_str(char *buf, size_t buf_size, const void *entry, size_t entry_size)
 {
 	if (WARN_ON_ONCE(buf_size < entry_size * 2 + 1)) {
 		snprintf(buf, buf_size, "overflow");
@@ -546,19 +547,6 @@ static void ptval_bytes_to_hex_str(char *buf, size_t buf_size, const void *entry
 	}
 }
 
-#define ptval_to_str(buf, val)								\
-	do {										\
-		auto __val = (val);							\
-											\
-		ptval_bytes_to_hex_str((buf), sizeof(buf), &__val, sizeof(__val));	\
-	} while (0)
-
-#if defined(__SIZEOF_INT128__)
-#define PTVAL_STR_MAX	(32 + 1) /* Max 128-bit value in hex + NUL */
-#else
-#define PTVAL_STR_MAX	(16 + 1) /* Max 64-bit value in hex + NUL */
-#endif
-
 static void __print_bad_page_map_pgtable(struct mm_struct *mm, unsigned long addr)
 {
 	char pgd_str[PTVAL_STR_MAX];
-- 
2.43.0