mm: page_alloc: move sysctls into it own fils

This moves all page alloc related sysctls to its own file, as part of the
kernel/sysctl.c spring cleaning, also move some functions declarations
from mm.h into internal.h.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Kefeng Wang <[email protected]>
Cc: David Hildenbrand <[email protected]>
Cc: "Huang, Ying" <[email protected]>
Cc: Iurii Zaikin <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Len Brown <[email protected]>
Cc: Luis Chamberlain <[email protected]>
Cc: Mike Rapoport (IBM) <[email protected]>
Cc: Oscar Salvador <[email protected]>
Cc: Pavel Machek <[email protected]>
Cc: Rafael J. Wysocki <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

1 files changed, 11 insertions, 0 deletions

diff --git a/mm/internal.h b/mm/internal.h
index c99da2cfac71..66d7ddf7e211 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -213,6 +213,13 @@ static inline bool is_check_pages_enabled(void)
 	return static_branch_unlikely(&check_pages_enabled);
 }
 
+extern int min_free_kbytes;
+
+void setup_per_zone_wmarks(void);
+void calculate_min_free_kbytes(void);
+int __meminit init_per_zone_wmark_min(void);
+void page_alloc_sysctl_init(void);
+
 /*
  * Structure for holding the mostly immutable allocation parameters passed
  * between functions involved in allocations, including the alloc_pages*
@@ -423,6 +430,10 @@ extern void *memmap_alloc(phys_addr_t size, phys_addr_t align,
 			  phys_addr_t min_addr,
 			  int nid, bool exact_nid);
 
+void memmap_init_range(unsigned long, int, unsigned long, unsigned long,
+		unsigned long, enum meminit_context, struct vmem_altmap *, int);
+
+
 int split_free_page(struct page *free_page,
 			unsigned int order, unsigned long split_pfn_offset);