mm/ARM: use common help functions to free reserved pages

Use common help functions to free reserved pages.

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 18 insertions, 56 deletions

diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index ad9a9f3f0322..611f21772fa8 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -427,24 +427,6 @@ void __init bootmem_init(void)
         max_pfn = max_high - PHYS_PFN_OFFSET;
 }
 
-static inline int free_area(unsigned long pfn, unsigned long end, char *s)
-{
-        unsigned int pages = 0, size = (end - pfn) << (PAGE_SHIFT - 10);
-
-        for (; pfn < end; pfn++) {
-                struct page *page = pfn_to_page(pfn);
-                ClearPageReserved(page);
-                init_page_count(page);
-                __free_page(page);
-                pages++;
-        }
-
-        if (size && s)
-                printk(KERN_INFO "Freeing %s memory: %dK\n", s, size);
-
-        return pages;
-}
-
 /*
  * Poison init memory with an undefined instruction (ARM) or a branch to an
  * undefined instruction (Thumb).
@@ -537,6 +519,16 @@ static void __init free_unused_memmap(struct meminfo *mi)
 #endif
 }
 
+#ifdef CONFIG_HIGHMEM
+static inline void free_area_high(unsigned long pfn, unsigned long end)
+{
+        for (; pfn < end; pfn++) {
+                __free_reserved_page(pfn_to_page(pfn));
+                totalhigh_pages++;
+        }
+}
+#endif
+
 static void __init free_highpages(void)
 {
 #ifdef CONFIG_HIGHMEM
@@ -572,8 +564,7 @@ static void __init free_highpages(void)
                         if (res_end > end)
                                 res_end = end;
                         if (res_start != start)
-                                totalhigh_pages += free_area(start, res_start,
-                                                             NULL);
+                                free_area_high(start, res_start);
                         start = res_end;
                         if (start == end)
                                 break;
@@ -581,7 +572,7 @@ static void __init free_highpages(void)
 
                 /* And now free anything which remains */
                 if (start < end)
-                        totalhigh_pages += free_area(start, end, NULL);
+                        free_area_high(start, end);
         }
         totalram_pages += totalhigh_pages;
 #endif
@@ -612,8 +603,7 @@ void __init mem_init(void)
 
 #ifdef CONFIG_SA1111
         /* now that our DMA memory is actually so designated, we can free it */
-        totalram_pages += free_area(PHYS_PFN_OFFSET,
-                                    __phys_to_pfn(__pa(swapper_pg_dir)), NULL);
+        free_reserved_area(__va(PHYS_PFN_OFFSET), swapper_pg_dir, 0, NULL);
 #endif
 
         free_highpages();
@@ -741,16 +731,12 @@ void free_initmem(void)
         extern char __tcm_start, __tcm_end;
 
         poison_init_mem(&__tcm_start, &__tcm_end - &__tcm_start);
-        totalram_pages += free_area(__phys_to_pfn(__pa(&__tcm_start)),
-                                    __phys_to_pfn(__pa(&__tcm_end)),
-                                    "TCM link");
+        free_reserved_area(&__tcm_start, &__tcm_end, 0, "TCM link");
 #endif
 
         poison_init_mem(__init_begin, __init_end - __init_begin);
         if (!machine_is_integrator() && !machine_is_cintegrator())
-                totalram_pages += free_area(__phys_to_pfn(__pa(__init_begin)),
-                                            __phys_to_pfn(__pa(__init_end)),
-                                            "init");
+                free_initmem_default(0);
 }
 
 #ifdef CONFIG_BLK_DEV_INITRD
@@ -761,9 +747,7 @@ void free_initrd_mem(unsigned long start, unsigned long end)
 {
         if (!keep_initrd) {
                 poison_init_mem((void *)start, PAGE_ALIGN(end) - start);
-                totalram_pages += free_area(__phys_to_pfn(__pa(start)),
-                                            __phys_to_pfn(__pa(end)),
-                                            "initrd");
+                free_reserved_area(start, end, 0, "initrd");
         }
 }
 
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index 800aac306a08..f497ca77925a 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -197,24 +197,6 @@ void __init bootmem_init(void)
         max_pfn = max_low_pfn = max;
 }
 
-static inline int free_area(unsigned long pfn, unsigned long end, char *s)
-{
-        unsigned int pages = 0, size = (end - pfn) << (PAGE_SHIFT - 10);
-
-        for (; pfn < end; pfn++) {
-                struct page *page = pfn_to_page(pfn);
-                ClearPageReserved(page);
-                init_page_count(page);
-                __free_page(page);
-                pages++;
-        }
-
-        if (size && s)
-                pr_info("Freeing %s memory: %dK\n", s, size);
-
-        return pages;
-}
-
 /*
  * Poison init memory with an undefined instruction (0x0).
  */
@@ -405,9 +387,7 @@ void __init mem_init(void)
 void free_initmem(void)
 {
         poison_init_mem(__init_begin, __init_end - __init_begin);
-        totalram_pages += free_area(__phys_to_pfn(__pa(__init_begin)),
-                                    __phys_to_pfn(__pa(__init_end)),
-                                    "init");
+        free_initmem_default(0);
 }
 
 #ifdef CONFIG_BLK_DEV_INITRD
@@ -418,9 +398,7 @@ void free_initrd_mem(unsigned long start, unsigned long end)
 {
         if (!keep_initrd) {
                 poison_init_mem((void *)start, PAGE_ALIGN(end) - start);
-                totalram_pages += free_area(__phys_to_pfn(__pa(start)),
-                                            __phys_to_pfn(__pa(end)),
-                                            "initrd");
+                free_reserved_area(start, end, 0, "initrd");
         }
 }