proc: move pagecount stuff to fs/proc/page.c

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>

diff --git a/fs/proc/Makefile b/fs/proc/Makefile
index b921f44..fef5244 100644 (file)
--- a/fs/proc/Makefile
+++ b/fs/proc/Makefile
@@ -24,3 +24,4 @@ proc-$(CONFIG_PROC_KCORE)     += kcore.o
 proc-$(CONFIG_PROC_VMCORE)     += vmcore.o
 proc-$(CONFIG_PROC_DEVICETREE) += proc_devtree.o
 proc-$(CONFIG_PRINTK)  += kmsg.o
+proc-$(CONFIG_PROC_PAGE_MONITOR)       += page.o

diff --git a/fs/proc/page.c b/fs/proc/page.c
new file mode 100644 (file)
index 0000000..767d95a
--- /dev/null
+++ b/fs/proc/page.c
@@ -0,0 +1,147 @@
+#include <linux/bootmem.h>
+#include <linux/compiler.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/mmzone.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <asm/uaccess.h>
+#include "internal.h"
+
+#define KPMSIZE sizeof(u64)
+#define KPMMASK (KPMSIZE - 1)
+/* /proc/kpagecount - an array exposing page counts
+ *
+ * Each entry is a u64 representing the corresponding
+ * physical page count.
+ */
+static ssize_t kpagecount_read(struct file *file, char __user *buf,
+                            size_t count, loff_t *ppos)
+{
+       u64 __user *out = (u64 __user *)buf;
+       struct page *ppage;
+       unsigned long src = *ppos;
+       unsigned long pfn;
+       ssize_t ret = 0;
+       u64 pcount;
+
+       pfn = src / KPMSIZE;
+       count = min_t(size_t, count, (max_pfn * KPMSIZE) - src);
+       if (src & KPMMASK || count & KPMMASK)
+               return -EINVAL;
+
+       while (count > 0) {
+               ppage = NULL;
+               if (pfn_valid(pfn))
+                       ppage = pfn_to_page(pfn);
+               pfn++;
+               if (!ppage)
+                       pcount = 0;
+               else
+                       pcount = page_mapcount(ppage);
+
+               if (put_user(pcount, out++)) {
+                       ret = -EFAULT;
+                       break;
+               }
+
+               count -= KPMSIZE;
+       }
+
+       *ppos += (char __user *)out - buf;
+       if (!ret)
+               ret = (char __user *)out - buf;
+       return ret;
+}
+
+static const struct file_operations proc_kpagecount_operations = {
+       .llseek = mem_lseek,
+       .read = kpagecount_read,
+};
+
+/* /proc/kpageflags - an array exposing page flags
+ *
+ * Each entry is a u64 representing the corresponding
+ * physical page flags.
+ */
+
+/* These macros are used to decouple internal flags from exported ones */
+
+#define KPF_LOCKED     0
+#define KPF_ERROR      1
+#define KPF_REFERENCED 2
+#define KPF_UPTODATE   3
+#define KPF_DIRTY      4
+#define KPF_LRU        5
+#define KPF_ACTIVE     6
+#define KPF_SLAB       7
+#define KPF_WRITEBACK  8
+#define KPF_RECLAIM    9
+#define KPF_BUDDY     10
+
+#define kpf_copy_bit(flags, srcpos, dstpos) (((flags >> srcpos) & 1) << dstpos)
+
+static ssize_t kpageflags_read(struct file *file, char __user *buf,
+                            size_t count, loff_t *ppos)
+{
+       u64 __user *out = (u64 __user *)buf;
+       struct page *ppage;
+       unsigned long src = *ppos;
+       unsigned long pfn;
+       ssize_t ret = 0;
+       u64 kflags, uflags;
+
+       pfn = src / KPMSIZE;
+       count = min_t(unsigned long, count, (max_pfn * KPMSIZE) - src);
+       if (src & KPMMASK || count & KPMMASK)
+               return -EINVAL;
+
+       while (count > 0) {
+               ppage = NULL;
+               if (pfn_valid(pfn))
+                       ppage = pfn_to_page(pfn);
+               pfn++;
+               if (!ppage)
+                       kflags = 0;
+               else
+                       kflags = ppage->flags;
+
+               uflags = kpf_copy_bit(KPF_LOCKED, PG_locked, kflags) |
+                       kpf_copy_bit(kflags, KPF_ERROR, PG_error) |
+                       kpf_copy_bit(kflags, KPF_REFERENCED, PG_referenced) |
+                       kpf_copy_bit(kflags, KPF_UPTODATE, PG_uptodate) |
+                       kpf_copy_bit(kflags, KPF_DIRTY, PG_dirty) |
+                       kpf_copy_bit(kflags, KPF_LRU, PG_lru) |
+                       kpf_copy_bit(kflags, KPF_ACTIVE, PG_active) |
+                       kpf_copy_bit(kflags, KPF_SLAB, PG_slab) |
+                       kpf_copy_bit(kflags, KPF_WRITEBACK, PG_writeback) |
+                       kpf_copy_bit(kflags, KPF_RECLAIM, PG_reclaim) |
+                       kpf_copy_bit(kflags, KPF_BUDDY, PG_buddy);
+
+               if (put_user(uflags, out++)) {
+                       ret = -EFAULT;
+                       break;
+               }
+
+               count -= KPMSIZE;
+       }
+
+       *ppos += (char __user *)out - buf;
+       if (!ret)
+               ret = (char __user *)out - buf;
+       return ret;
+}
+
+static const struct file_operations proc_kpageflags_operations = {
+       .llseek = mem_lseek,
+       .read = kpageflags_read,
+};
+
+static int __init proc_page_init(void)
+{
+       proc_create("kpagecount", S_IRUSR, NULL, &proc_kpagecount_operations);
+       proc_create("kpageflags", S_IRUSR, NULL, &proc_kpageflags_operations);
+       return 0;
+}
+module_init(proc_page_init);

diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c
index 5ed15ff..2ef9ef9 100644 (file)
--- a/fs/proc/proc_misc.c
+++ b/fs/proc/proc_misc.c
@@ -57,146 +57,11 @@
 #include <asm/div64.h>
 #include "internal.h"
 
-#ifdef CONFIG_PROC_PAGE_MONITOR
-#define KPMSIZE sizeof(u64)
-#define KPMMASK (KPMSIZE - 1)
-/* /proc/kpagecount - an array exposing page counts
- *
- * Each entry is a u64 representing the corresponding
- * physical page count.
- */
-static ssize_t kpagecount_read(struct file *file, char __user *buf,
-                            size_t count, loff_t *ppos)
-{
-       u64 __user *out = (u64 __user *)buf;
-       struct page *ppage;
-       unsigned long src = *ppos;
-       unsigned long pfn;
-       ssize_t ret = 0;
-       u64 pcount;
-
-       pfn = src / KPMSIZE;
-       count = min_t(size_t, count, (max_pfn * KPMSIZE) - src);
-       if (src & KPMMASK || count & KPMMASK)
-               return -EINVAL;
-
-       while (count > 0) {
-               ppage = NULL;
-               if (pfn_valid(pfn))
-                       ppage = pfn_to_page(pfn);
-               pfn++;
-               if (!ppage)
-                       pcount = 0;
-               else
-                       pcount = page_mapcount(ppage);
-
-               if (put_user(pcount, out++)) {
-                       ret = -EFAULT;
-                       break;
-               }
-
-               count -= KPMSIZE;
-       }
-
-       *ppos += (char __user *)out - buf;
-       if (!ret)
-               ret = (char __user *)out - buf;
-       return ret;
-}
-
-static struct file_operations proc_kpagecount_operations = {
-       .llseek = mem_lseek,
-       .read = kpagecount_read,
-};
-
-/* /proc/kpageflags - an array exposing page flags
- *
- * Each entry is a u64 representing the corresponding
- * physical page flags.
- */
-
-/* These macros are used to decouple internal flags from exported ones */
-
-#define KPF_LOCKED     0
-#define KPF_ERROR      1
-#define KPF_REFERENCED 2
-#define KPF_UPTODATE   3
-#define KPF_DIRTY      4
-#define KPF_LRU        5
-#define KPF_ACTIVE     6
-#define KPF_SLAB       7
-#define KPF_WRITEBACK  8
-#define KPF_RECLAIM    9
-#define KPF_BUDDY     10
-
-#define kpf_copy_bit(flags, srcpos, dstpos) (((flags >> srcpos) & 1) << dstpos)
-
-static ssize_t kpageflags_read(struct file *file, char __user *buf,
-                            size_t count, loff_t *ppos)
-{
-       u64 __user *out = (u64 __user *)buf;
-       struct page *ppage;
-       unsigned long src = *ppos;
-       unsigned long pfn;
-       ssize_t ret = 0;
-       u64 kflags, uflags;
-
-       pfn = src / KPMSIZE;
-       count = min_t(unsigned long, count, (max_pfn * KPMSIZE) - src);
-       if (src & KPMMASK || count & KPMMASK)
-               return -EINVAL;
-
-       while (count > 0) {
-               ppage = NULL;
-               if (pfn_valid(pfn))
-                       ppage = pfn_to_page(pfn);
-               pfn++;
-               if (!ppage)
-                       kflags = 0;
-               else
-                       kflags = ppage->flags;
-
-               uflags = kpf_copy_bit(KPF_LOCKED, PG_locked, kflags) |
-                       kpf_copy_bit(kflags, KPF_ERROR, PG_error) |
-                       kpf_copy_bit(kflags, KPF_REFERENCED, PG_referenced) |
-                       kpf_copy_bit(kflags, KPF_UPTODATE, PG_uptodate) |
-                       kpf_copy_bit(kflags, KPF_DIRTY, PG_dirty) |
-                       kpf_copy_bit(kflags, KPF_LRU, PG_lru) |
-                       kpf_copy_bit(kflags, KPF_ACTIVE, PG_active) |
-                       kpf_copy_bit(kflags, KPF_SLAB, PG_slab) |
-                       kpf_copy_bit(kflags, KPF_WRITEBACK, PG_writeback) |
-                       kpf_copy_bit(kflags, KPF_RECLAIM, PG_reclaim) |
-                       kpf_copy_bit(kflags, KPF_BUDDY, PG_buddy);
-
-               if (put_user(uflags, out++)) {
-                       ret = -EFAULT;
-                       break;
-               }
-
-               count -= KPMSIZE;
-       }
-
-       *ppos += (char __user *)out - buf;
-       if (!ret)
-               ret = (char __user *)out - buf;
-       return ret;
-}
-
-static struct file_operations proc_kpageflags_operations = {
-       .llseek = mem_lseek,
-       .read = kpageflags_read,
-};
-#endif /* CONFIG_PROC_PAGE_MONITOR */
-
 void __init proc_misc_init(void)
 {
        proc_symlink("mounts", NULL, "self/mounts");
 
        /* And now for trickier ones */
-#ifdef CONFIG_PROC_PAGE_MONITOR
-       proc_create("kpagecount", S_IRUSR, NULL, &proc_kpagecount_operations);
-       proc_create("kpageflags", S_IRUSR, NULL, &proc_kpageflags_operations);
-#endif
 #ifdef CONFIG_PROC_VMCORE
        proc_vmcore = proc_create("vmcore", S_IRUSR, NULL, &proc_vmcore_operations);
 #endif