mm: ptdump: expand type of 'val' in note_page()

The page table entry is passed in the 'val' argument to note_page(),
however this was previously an "unsigned long" which is fine on 64-bit
platforms.  But for 32 bit x86 it is not always big enough to contain a
page table entry which may be 64 bits.

Change the type to u64 to ensure that it is always big enough.

[[email protected]: fix riscv]
Reported-by: Jan Beulich <[email protected]>
Signed-off-by: Steven Price <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Linus Torvalds <[email protected]>

Author: Steven Price

arch/arm64/mm/dump.c

@@ -247,7 +247,7 @@ static void note_prot_wx(struct pg_state *st, unsigned long addr)
 }
 
 static void note_page(struct ptdump_state *pt_st, unsigned long addr, int level,
-		      unsigned long val)
+		      u64 val)
 {
 	struct pg_state *st = container_of(pt_st, struct pg_state, ptdump);
 	static const char units[] = "KMGTPE";

arch/riscv/mm/ptdump.c

@@ -204,7 +204,7 @@ static void note_prot_wx(struct pg_state *st, unsigned long addr)
 }
 
 static void note_page(struct ptdump_state *pt_st, unsigned long addr,
-		      int level, unsigned long val)
+		      int level, u64 val)
 {
 	struct pg_state *st = container_of(pt_st, struct pg_state, ptdump);
 	u64 pa = PFN_PHYS(pte_pfn(__pte(val)));

arch/x86/mm/dump_pagetables.c

@@ -273,7 +273,7 @@ static void effective_prot(struct ptdump_state *pt_st, int level, u64 val)
  * print what we collected so far.
  */
 static void note_page(struct ptdump_state *pt_st, unsigned long addr, int level,
-		      unsigned long val)
+		      u64 val)
 {
 	struct pg_state *st = container_of(pt_st, struct pg_state, ptdump);
 	pgprotval_t new_prot, new_eff;

include/linux/ptdump.h

@@ -13,7 +13,7 @@ struct ptdump_range {
 struct ptdump_state {
 	/* level is 0:PGD to 4:PTE, or -1 if unknown */
 	void (*note_page)(struct ptdump_state *st, unsigned long addr,
-			  int level, unsigned long val);
+			  int level, u64 val);
 	void (*effective_prot)(struct ptdump_state *st, int level, u64 val);
 	const struct ptdump_range *range;
 };