[PATCH] architecture-independand si_meminfo

Si_meminfo() is basically the same for all architectures (mips is a little
different by providing a value for the shared field that is different from
the originial intent, I will come back to this later), so it makes to have just
one instance of it:

arch/alpha/mm/init.c

@@ -36,8 +36,6 @@
 
 mmu_gather_t mmu_gathers[NR_CPUS];
 
-unsigned long totalram_pages;
-
 extern void die_if_kernel(char *,struct pt_regs *,long);
 
 static struct pcb_struct original_pcb;
@@ -390,15 +388,3 @@ free_initrd_mem(unsigned long start, unsigned long end)
 	printk ("Freeing initrd memory: %ldk freed\n", (end - __start) >> 10);
 }
 #endif
-
-void
-si_meminfo(struct sysinfo *val)
-{
-	val->totalram = totalram_pages;
-	val->sharedram = 0;
-	val->freeram = nr_free_pages();
-	val->bufferram = atomic_read(&buffermem_pages);
-	val->totalhigh = 0;
-	val->freehigh = 0;
-	val->mem_unit = PAGE_SIZE;
-}

arch/alpha/mm/numa.c

@@ -358,7 +358,6 @@ void __init mem_init(void)
 	extern int page_is_ram(unsigned long) __init;
 	extern char _text, _etext, _data, _edata;
 	extern char __init_begin, __init_end;
-	extern unsigned long totalram_pages;
 	unsigned long nid, i;
 	mem_map_t * lmem_map;
 

arch/arm/mm/init.c

@@ -48,7 +48,6 @@
 
 #define TABLE_SIZE	((TABLE_OFFSET + PTRS_PER_PTE) * sizeof(pte_t))
 
-static unsigned long totalram_pages;
 extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
 extern char _stext, _text, _etext, _end, __init_begin, __init_end;
 
@@ -631,14 +630,3 @@ static int __init keepinitrd_setup(char *__unused)
 
 __setup("keepinitrd", keepinitrd_setup);
 #endif
-
-void si_meminfo(struct sysinfo *val)
-{
-	val->totalram  = totalram_pages;
-	val->sharedram = 0;
-	val->freeram   = nr_free_pages();
-	val->bufferram = atomic_read(&buffermem_pages);
-	val->totalhigh = 0;
-	val->freehigh  = 0;
-	val->mem_unit  = PAGE_SIZE;
-}

arch/cris/mm/init.c

@@ -114,8 +114,6 @@
 #include <asm/io.h>
 #include <asm/mmu_context.h>
 
-static unsigned long totalram_pages;
-
 struct pgtable_cache_struct quicklists;  /* see asm/pgalloc.h */
 
 const char bad_pmd_string[] = "Bad pmd in pte_alloc: %08lx\n";
@@ -471,15 +469,3 @@ free_initmem(void)
         printk ("Freeing unused kernel memory: %luk freed\n", 
 		(&__init_end - &__init_begin) >> 10);
 }
-
-void 
-si_meminfo(struct sysinfo *val)
-{
-        val->totalram = totalram_pages;
-        val->sharedram = 0;
-        val->freeram = nr_free_pages();
-        val->bufferram = atomic_read(&buffermem_pages);
-        val->totalhigh = 0;
-        val->freehigh = 0;
-        val->mem_unit = PAGE_SIZE;
-}

arch/i386/mm/init.c

@@ -41,8 +41,6 @@
 
 mmu_gather_t mmu_gathers[NR_CPUS];
 unsigned long highstart_pfn, highend_pfn;
-static unsigned long totalram_pages;
-static unsigned long totalhigh_pages;
 
 /*
  * NOTE: pagetable_init alloc all the fixmap pagetables contiguous on the
@@ -561,18 +559,6 @@ void free_initrd_mem(unsigned long start, unsigned long end)
 }
 #endif
 
-void si_meminfo(struct sysinfo *val)
-{
-	val->totalram = totalram_pages;
-	val->sharedram = 0;
-	val->freeram = nr_free_pages();
-	val->bufferram = atomic_read(&buffermem_pages);
-	val->totalhigh = totalhigh_pages;
-	val->freehigh = nr_free_highpages();
-	val->mem_unit = PAGE_SIZE;
-	return;
-}
-
 #if defined(CONFIG_X86_PAE)
 static struct kmem_cache_s *pae_pgd_cachep;
 

arch/ia64/mm/init.c

@@ -36,8 +36,6 @@ extern void ia64_tlb_init (void);
 
 unsigned long MAX_DMA_ADDRESS = PAGE_OFFSET + 0x100000000UL;
 
-static unsigned long totalram_pages;
-
 static int pgt_cache_water[2] = { 25, 50 };
 
 void
@@ -158,19 +156,6 @@ free_initrd_mem (unsigned long start, unsigned long end)
 	}
 }
 
-void
-si_meminfo (struct sysinfo *val)
-{
-	val->totalram = totalram_pages;
-	val->sharedram = 0;
-	val->freeram = nr_free_pages();
-	val->bufferram = atomic_read(&buffermem_pages);
-	val->totalhigh = 0;
-	val->freehigh = 0;
-	val->mem_unit = PAGE_SIZE;
-	return;
-}
-
 void
 show_mem(void)
 {

arch/m68k/mm/init.c

@@ -35,8 +35,6 @@
 
 mmu_gather_t mmu_gathers[NR_CPUS];
 
-unsigned long totalram_pages = 0;
-
 int do_check_pgt_cache(int low, int high)
 {
 	int freed = 0;
@@ -202,18 +200,3 @@ void free_initrd_mem(unsigned long start, unsigned long end)
 	printk ("Freeing initrd memory: %dk freed\n", pages);
 }
 #endif
-
-void si_meminfo(struct sysinfo *val)
-{
-    unsigned long i;
-
-    i = max_mapnr;
-    val->totalram = totalram_pages;
-    val->sharedram = 0;
-    val->freeram = nr_free_pages();
-    val->bufferram = atomic_read(&buffermem_pages);
-    val->totalhigh = 0;
-    val->freehigh = 0;
-    val->mem_unit = PAGE_SIZE;
-    return;
-}

arch/m68k/mm/motorola.c

@@ -286,7 +286,6 @@ void __init paging_init(void)
 }
 
 extern char __init_begin, __init_end;
-extern unsigned long totalram_pages;
 
 void free_initmem(void)
 {

arch/mips/mm/init.c

@@ -45,8 +45,6 @@
 
 mmu_gather_t mmu_gathers[NR_CPUS];
 
-static unsigned long totalram_pages;
-
 extern void prom_free_prom_memory(void);
 
 
@@ -265,16 +263,3 @@ void free_initmem(void)
 	printk("Freeing unused kernel memory: %dk freed\n",
 	       (&__init_end - &__init_begin) >> 10);
 }
-
-void si_meminfo(struct sysinfo *val)
-{
-	val->totalram = totalram_pages;
-	val->sharedram = atomic_read(&shmem_nrpages);
-	val->freeram = nr_free_pages();
-	val->bufferram = atomic_read(&buffermem_pages);
-	val->totalhigh = 0;
-	val->freehigh = nr_free_highpages();
-	val->mem_unit = PAGE_SIZE;
-
-	return;
-}

arch/mips64/mm/init.c

@@ -40,8 +40,6 @@
 
 mmu_gather_t mmu_gathers[NR_CPUS];
 
-unsigned long totalram_pages;
-
 void pgd_init(unsigned long page)
 {
 	unsigned long *p, *end;
@@ -458,17 +456,3 @@ free_initmem(void)
 	printk("Freeing unused kernel memory: %ldk freed\n",
 	       (&__init_end - &__init_begin) >> 10);
 }
-
-void
-si_meminfo(struct sysinfo *val)
-{
-	val->totalram = totalram_pages;
-	val->sharedram = atomic_read(&shmem_nrpages);
-	val->freeram = nr_free_pages();
-	val->bufferram = atomic_read(&buffermem_pages);
-	val->totalhigh = 0;
-	val->freehigh = nr_free_highpages();
-	val->mem_unit = PAGE_SIZE;
-
-	return;
-}

arch/mips64/sgi-ip27/ip27-memory.c

@@ -265,7 +265,6 @@ void __init mem_init(void)
 {
 	extern char _stext, _etext, _fdata, _edata;
 	extern char __init_begin, __init_end;
-	extern unsigned long totalram_pages;
 	extern unsigned long setup_zero_pages(void);
 	cnodeid_t nid;
 	unsigned long tmp;

arch/parisc/mm/init.c

@@ -20,7 +20,6 @@
 
 #include <asm/pgalloc.h>
 
-static unsigned long totalram_pages;
 extern unsigned long max_pfn, mem_max;
 
 void free_initmem(void)  {
@@ -451,29 +450,3 @@ void free_initrd_mem(unsigned long start, unsigned long end)
 #endif
 }
 #endif
-
-void si_meminfo(struct sysinfo *val)
-{
-	int i;
-
-	i = max_mapnr;
-	val->totalram = totalram_pages;
-	val->sharedram = 0;
-	val->freeram = nr_free_pages();
-	val->bufferram = atomic_read(&buffermem_pages);
-#if 0
-	while (i-- > 0)  {
-		if (PageReserved(mem_map+i))
-			continue;
-		val->totalram++;
-		if (!atomic_read(&mem_map[i].count))
-			continue;
-		val->sharedram += atomic_read(&mem_map[i].count) - 1;
-	}
-	val->totalram <<= PAGE_SHIFT;
-	val->sharedram <<= PAGE_SHIFT;
-#endif
-	val->totalhigh = 0;
-	val->freehigh = 0;
-	return;
-}

arch/ppc/mm/init.c

@@ -70,8 +70,6 @@ unsigned long ppc_memoffset = PAGE_OFFSET;
 int mem_init_done;
 int init_bootmem_done;
 int boot_mapsize;
-unsigned long totalram_pages;
-unsigned long totalhigh_pages;
 #ifdef CONFIG_ALL_PPC
 unsigned long agp_special_page;
 #endif
@@ -145,17 +143,6 @@ void show_mem(void)
 	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
-void si_meminfo(struct sysinfo *val)
-{
-	val->totalram = totalram_pages;
-	val->sharedram = 0;
-	val->freeram = nr_free_pages();
-	val->bufferram = atomic_read(&buffermem_pages);
-	val->totalhigh = totalhigh_pages;
-	val->freehigh = nr_free_highpages();
-	val->mem_unit = PAGE_SIZE;
-}
-
 /* Free up now-unused memory */
 static void free_sec(unsigned long start, unsigned long end, const char *name)
 {

arch/ppc64/mm/init.c

@@ -73,7 +73,6 @@ int mem_init_done;
 unsigned long ioremap_bot = IMALLOC_BASE;
 
 static int boot_mapsize;
-static unsigned long totalram_pages;
 
 extern pgd_t swapper_pg_dir[];
 extern char __init_begin, __init_end;
@@ -138,17 +137,6 @@ void show_mem(void)
 	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
-void si_meminfo(struct sysinfo *val)
-{
- 	val->totalram = totalram_pages;
-	val->sharedram = 0;
-	val->freeram = nr_free_pages();
-	val->bufferram = atomic_read(&buffermem_pages);
-	val->totalhigh = 0;
-	val->freehigh = 0;
-	val->mem_unit = PAGE_SIZE;
-}
-
 void *
 ioremap(unsigned long addr, unsigned long size)
 {

arch/s390/mm/init.c

@@ -39,8 +39,6 @@
 
 mmu_gather_t mmu_gathers[NR_CPUS];
 
-static unsigned long totalram_pages;
-
 pgd_t swapper_pg_dir[PTRS_PER_PGD] __attribute__((__aligned__(PAGE_SIZE)));
 char  empty_zero_page[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE)));
 
@@ -230,14 +228,3 @@ void free_initrd_mem(unsigned long start, unsigned long end)
         }
 }
 #endif
-
-void si_meminfo(struct sysinfo *val)
-{
-	val->totalram = totalram_pages;
-	val->sharedram = 0;
-	val->freeram = nr_free_pages();
-	val->bufferram = atomic_read(&buffermem_pages);
-	val->totalhigh = 0;
-	val->freehigh = 0;
-	val->mem_unit = PAGE_SIZE;
-}

arch/s390x/mm/init.c

@@ -39,8 +39,6 @@
 
 mmu_gather_t mmu_gathers[NR_CPUS];
 
-static unsigned long totalram_pages;
-
 pgd_t swapper_pg_dir[PTRS_PER_PGD] __attribute__((__aligned__(PAGE_SIZE)));
 char  empty_zero_page[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE)));
 
@@ -243,17 +241,6 @@ void free_initrd_mem(unsigned long start, unsigned long end)
 }
 #endif
 
-void si_meminfo(struct sysinfo *val)
-{
-        val->totalram = totalram_pages;
-	val->sharedram = 0;
-	val->freeram = nr_free_pages();
-	val->bufferram = atomic_read(&buffermem_pages);
-	val->totalhigh = 0;
-	val->freehigh = 0;
-	val->mem_unit = PAGE_SIZE;
-}
-
 /*
  * Overrides for Emacs so that we follow Linus's tabbing style.
  * Emacs will notice this stuff at the end of the file and automatically

arch/sh/mm/init.c

@@ -48,9 +48,6 @@ pg_data_t discontig_page_data[NR_NODES];
 bootmem_data_t discontig_node_bdata[NR_NODES];
 #endif
 
-static unsigned long totalram_pages;
-static unsigned long totalhigh_pages;
-
 void show_mem(void)
 {
 	int i, total = 0, reserved = 0;
@@ -203,15 +200,3 @@ void free_initrd_mem(unsigned long start, unsigned long end)
 	printk ("Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
 }
 #endif
-
-void si_meminfo(struct sysinfo *val)
-{
-	val->totalram = totalram_pages;
-	val->sharedram = 0;
-	val->freeram = nr_free_pages();
-	val->bufferram = atomic_read(&buffermem_pages);
-	val->totalhigh = totalhigh_pages;
-	val->freehigh = nr_free_highpages();
-	val->mem_unit = PAGE_SIZE;
-	return;
-}

arch/sparc/kernel/sun4d_smp.c

@@ -63,8 +63,6 @@ extern volatile int smp_process_available;
 extern volatile int smp_commenced;
 extern int __smp4d_processor_id(void);
 
-extern unsigned long totalram_pages;
-
 /* #define SMP_DEBUG */
 
 #ifdef SMP_DEBUG

arch/sparc/kernel/sun4m_smp.c

@@ -59,8 +59,6 @@ extern volatile int smp_process_available;
 extern volatile int smp_commenced;
 extern int __smp4m_processor_id(void);
 
-extern unsigned long totalram_pages;
-
 /*#define SMP_DEBUG*/
 
 #ifdef SMP_DEBUG

arch/sparc/mm/init.c

@@ -55,8 +55,6 @@ extern unsigned int sparc_ramdisk_image;
 extern unsigned int sparc_ramdisk_size;
 
 unsigned long highstart_pfn, highend_pfn;
-unsigned long totalram_pages;
-unsigned long totalhigh_pages;
 
 pte_t *kmap_pte;
 pgprot_t kmap_prot;
@@ -505,18 +503,6 @@ void free_initrd_mem(unsigned long start, unsigned long end)
 }
 #endif
 
-void si_meminfo(struct sysinfo *val)
-{
-	val->totalram = totalram_pages;
-	val->sharedram = 0;
-	val->freeram = nr_free_pages();
-	val->bufferram = atomic_read(&buffermem_pages);
-	val->totalhigh = totalhigh_pages;
-	val->freehigh = nr_free_highpages();
-
-	val->mem_unit = PAGE_SIZE;
-}
-
 void flush_page_to_ram(struct page *page)
 {
 	unsigned long vaddr = (unsigned long)page_address(page);

arch/sparc/mm/srmmu.c

@@ -1105,7 +1105,6 @@ static inline void map_kernel(void)
 extern void sparc_context_init(int);
 
 extern int linux_num_cpus;
-extern unsigned long totalhigh_pages;
 
 void (*poke_srmmu)(void) __initdata = NULL;
 

arch/sparc64/mm/init.c

@@ -1790,17 +1790,3 @@ void free_initrd_mem(unsigned long start, unsigned long end)
 	}
 }
 #endif
-
-void si_meminfo(struct sysinfo *val)
-{
-	val->totalram = num_physpages;
-	val->sharedram = 0;
-	val->freeram = nr_free_pages();
-	val->bufferram = atomic_read(&buffermem_pages);
-
-	/* These are always zero on Sparc64. */
-	val->totalhigh = 0;
-	val->freehigh = 0;
-
-	val->mem_unit = PAGE_SIZE;
-}

arch/x86_64/mm/init.c

@@ -39,8 +39,6 @@
 
 mmu_gather_t mmu_gathers[NR_CPUS];
 
-static unsigned long totalram_pages;
-
 /*
  * NOTE: pagetable_init alloc all the fixmap pagetables contiguous on the
  * physical space so we can cache the place of the first one and move
@@ -385,15 +383,3 @@ void free_initrd_mem(unsigned long start, unsigned long end)
 	}
 }
 #endif
-
-void si_meminfo(struct sysinfo *val)
-{
-	val->totalram = totalram_pages;
-	val->sharedram = 0;
-	val->freeram = nr_free_pages();
-	val->bufferram = atomic_read(&buffermem_pages);
-	val->totalhigh = 0;
-	val->freehigh = nr_free_highpages();
-	val->mem_unit = PAGE_SIZE;
-	return;
-}

include/linux/swap.h

@@ -96,6 +96,8 @@ extern int nr_swap_pages;
 /* Swap 50% full? Release swapcache more aggressively.. */
 #define vm_swap_full() (nr_swap_pages*2 < total_swap_pages)
 
+extern unsigned long totalram_pages;
+extern unsigned long totalhigh_pages;
 extern unsigned int nr_free_pages(void);
 extern unsigned int nr_free_buffer_pages(void);
 extern unsigned int nr_free_pagecache_pages(void);

mm/page_alloc.c

@@ -23,6 +23,8 @@
 #include <linux/compiler.h>
 #include <linux/module.h>
 
+unsigned long totalram_pages;
+unsigned long totalhigh_pages;
 int nr_swap_pages;
 int nr_active_pages;
 int nr_inactive_pages;
@@ -606,6 +608,22 @@ unsigned long get_page_cache_size(void)
 	return ps.nr_pagecache;
 }
 
+void si_meminfo(struct sysinfo *val)
+{
+	val->totalram = totalram_pages;
+	val->sharedram = 0;
+	val->freeram = nr_free_pages();
+	val->bufferram = atomic_read(&buffermem_pages);
+#ifdef CONFIG_HIGHMEM
+	val->totalhigh = totalhigh_pages;
+	val->freehigh = nr_free_highpages();
+#else
+	val->totalhigh = 0;
+	val->freehigh = 0;
+#endif
+	val->mem_unit = PAGE_SIZE;
+}
+
 #define K(x) ((x) << (PAGE_SHIFT-10))
 
 /*