[PATCH] remove show_buffers()

Remove show_buffers().  It really has nothing to show any more.  just
buffermem_pages() - move that out into the callers.

There's a lot of duplication in this code.  better approach would be to
remove all the duplicated code out in the architectures and implement
generic show_memory_state().  Later.

arch/alpha/mm/init.c

@@ -139,7 +139,7 @@ show_mem(void)
 	printk("%ld reserved pages\n",reserved);
 	printk("%ld pages shared\n",shared);
 	printk("%ld pages swap cached\n",cached);
-	show_buffers();
+	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 #endif
 

arch/alpha/mm/numa.c

@@ -426,5 +426,5 @@ show_mem(void)
 	printk("%ld pages shared\n",shared);
 	printk("%ld pages swap cached\n",cached);
 	printk("%ld pages in page table cache\n",pgtable_cache_size);
-	show_buffers();
+	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }

arch/arm/mm/init.c

@@ -101,7 +101,7 @@ void show_mem(void)
 	printk("%d slab pages\n", slab);
 	printk("%d pages shared\n", shared);
 	printk("%d pages swap cached\n", cached);
-	show_buffers();
+	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 struct node_info {

arch/cris/mm/init.c

@@ -183,7 +183,7 @@ show_mem(void)
 	printk("%d pages shared\n",shared);
 	printk("%d pages swap cached\n",cached);
 	printk("%ld pages in page table cache\n",pgtable_cache_size);
-	show_buffers();
+	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 /*

arch/i386/mm/init.c

@@ -95,7 +95,7 @@ void show_mem(void)
 	printk("%d reserved pages\n",reserved);
 	printk("%d pages shared\n",shared);
 	printk("%d pages swap cached\n",cached);
-	show_buffers();
+	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 /* References to section boundaries */

arch/ia64/hp/sim/simserial.c

@@ -156,7 +156,6 @@ static  void receive_chars(struct tty_struct *tty, struct pt_regs *regs)
 				continue;
 			} else if ( seen_esc == 2 ) {
 				if ( ch == 'P' ) show_state();		/* F1 key */
-				if ( ch == 'Q' ) show_buffers();	/* F2 key */
 #ifdef CONFIG_KDB
 				if ( ch == 'S' )
 					kdb(KDB_REASON_KEYBOARD, 0, (kdb_eframe_t) regs);

arch/ia64/mm/init.c

@@ -200,7 +200,7 @@ show_mem(void)
 			pgdat = pgdat->node_next;
 		} while (pgdat);
 		printk("Total of %ld pages in page table cache\n", pgtable_cache_size);
-		show_buffers();
+		printk("%ld buffermem pages\n", nr_buffermem_pages());
 		printk("%d free buffer pages\n", nr_free_buffer_pages());
 	}
 #else /* !CONFIG_DISCONTIGMEM */
@@ -220,7 +220,7 @@ show_mem(void)
 	printk("%d pages shared\n", shared);
 	printk("%d pages swap cached\n", cached);
 	printk("%ld pages in page table cache\n", pgtable_cache_size);
-	show_buffers();
+	printk("%ld buffermem pages\n", nr_buffermem_pages());
 #endif /* !CONFIG_DISCONTIGMEM */
 }
 

arch/m68k/mm/init.c

@@ -109,7 +109,7 @@ void show_mem(void)
     printk("%d pages shared\n",shared);
     printk("%d pages swap cached\n",cached);
     printk("%ld pages in page table cache\n",pgtable_cache_size);
-    show_buffers();
+	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 extern void init_pointer_table(unsigned long ptable);

arch/mips/mm/init.c

@@ -137,7 +137,7 @@ void show_mem(void)
 	printk("%d pages swap cached\n",cached);
 	printk("%ld pages in page table cache\n",pgtable_cache_size);
 	printk("%d free pages\n", free);
-	show_buffers();
+	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 /* References to section boundaries */

arch/mips64/mm/init.c

@@ -341,7 +341,7 @@ void show_mem(void)
 	printk("%d pages swap cached\n",cached);
 	printk("%ld pages in page table cache\n", pgtable_cache_size);
 	printk("%d free pages\n", free);
-	show_buffers();
+	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 #ifndef CONFIG_DISCONTIGMEM

arch/parisc/mm/init.c

@@ -155,7 +155,7 @@ void show_mem(void)
 	printk("%d reserved pages\n",reserved);
 	printk("%d pages shared\n",shared);
 	printk("%d pages swap cached\n",cached);
-	show_buffers();
+	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 void set_pte_phys (unsigned long vaddr, unsigned long phys)

arch/ppc/mm/init.c

@@ -142,7 +142,7 @@ void show_mem(void)
 	printk("%d reserved pages\n",reserved);
 	printk("%d pages shared\n",shared);
 	printk("%d pages swap cached\n",cached);
-	show_buffers();
+	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 void si_meminfo(struct sysinfo *val)

arch/ppc64/mm/init.c

@@ -138,7 +138,7 @@ void show_mem(void)
 	printk("%d reserved pages\n",reserved);
 	printk("%d pages shared\n",shared);
 	printk("%d pages swap cached\n",cached);
-	show_buffers();
+	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 void si_meminfo(struct sysinfo *val)

arch/s390/mm/init.c

@@ -89,7 +89,7 @@ void show_mem(void)
         printk("%d pages shared\n",shared);
         printk("%d pages swap cached\n",cached);
         printk("%ld pages in page table cache\n",pgtable_cache_size);
-        show_buffers();
+        printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 /* References to section boundaries */

arch/s390x/mm/init.c

@@ -89,7 +89,7 @@ void show_mem(void)
         printk("%d pages shared\n",shared);
         printk("%d pages swap cached\n",cached);
         printk("%ld pages in page table cache\n",pgtable_cache_size);
-        show_buffers();
+        printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 /* References to section boundaries */

arch/sh/mm/init.c

@@ -73,7 +73,7 @@ void show_mem(void)
 	printk("%d reserved pages\n",reserved);
 	printk("%d pages shared\n",shared);
 	printk("%d pages swap cached\n",cached);
-	show_buffers();
+	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 /* References to section boundaries */

arch/sparc/mm/init.c

@@ -84,7 +84,7 @@ void show_mem(void)
 	if (sparc_cpu_model == sun4m || sparc_cpu_model == sun4d)
 		printk("%ld entries in page dir cache\n",pgd_cache_size);
 #endif	
-	show_buffers();
+	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 extern pgprot_t protection_map[16];

arch/sparc64/mm/init.c

@@ -334,7 +334,7 @@ void show_mem(void)
 #ifndef CONFIG_SMP
 	printk("%d entries in page dir cache\n",pgd_cache_size);
 #endif	
-	show_buffers();
+	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 void mmu_info(struct seq_file *m)

arch/x86_64/mm/init.c

@@ -69,7 +69,7 @@ void show_mem(void)
 	printk("%d reserved pages\n",reserved);
 	printk("%d pages shared\n",shared);
 	printk("%d pages swap cached\n",cached);
-	show_buffers();
+	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 /* References to section boundaries */

drivers/sgi/char/sgiserial.c

@@ -423,7 +423,8 @@ static _INLINE_ void receive_chars(struct sgi_serial *info, struct pt_regs *regs
 			show_state();
 			return;
 		} else if (ch == 2) {
-			show_buffers();
+			printk("%ld buffermem pages\n",
+					nr_buffermem_pages());
 			return;
 		}
 	}

fs/buffer.c

@@ -2164,14 +2164,6 @@ int try_to_free_buffers(struct page *page)
 }
 EXPORT_SYMBOL(try_to_free_buffers);
 
-/* ================== Debugging =================== */
-
-void show_buffers(void)
-{
-	printk("Buffer memory:   %6dkB\n",
-			atomic_read(&buffermem_pages) << (PAGE_SHIFT-10));
-}
-
 int block_sync_page(struct page *page)
 {
 	run_task_queue(&tq_disk);

include/linux/fs.h

@@ -1586,8 +1586,6 @@ extern ssize_t generic_read_dir(struct file *, char *, size_t, loff_t *);
 extern struct file_operations simple_dir_operations;
 extern struct inode_operations simple_dir_inode_operations;
 
-extern void show_buffers(void);
-
 #ifdef CONFIG_BLK_DEV_INITRD
 extern unsigned int real_root_dev;
 #endif

include/linux/swap.h

@@ -98,6 +98,7 @@ extern int nr_swap_pages;
 extern unsigned int nr_free_pages(void);
 extern unsigned int nr_free_buffer_pages(void);
 extern unsigned int nr_free_pagecache_pages(void);
+extern unsigned long nr_buffermem_pages(void);
 extern int nr_active_pages;
 extern int nr_inactive_pages;
 extern atomic_t nr_async_pages;

mm/page_alloc.c

@@ -562,6 +562,11 @@ unsigned int nr_free_highpages (void)
 }
 #endif
 
+unsigned long nr_buffermem_pages(void)
+{
+	return atomic_read(&buffermem_pages);
+}
+
 /*
  * Accumulate the page_state information across all CPUs.
  * The result is unavoidably approximate - it can change