From 5249f4883045de494916db7b1a6d6e1e422e9a0b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= <arve@android.com>
Date: Tue, 28 Apr 2009 20:57:50 -0700
Subject: binder: Use seq_file for debug interface.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Patch-mainline: HEAD
Git-commit: 5249f4883045de494916db7b1a6d6e1e422e9a0b

Signed-off-by: Arve Hjønnevåg <arve@android.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/android/binder.c b/drivers/staging/android/binder.c
index 3aec4530..371232b 100644
--- a/drivers/staging/android/binder.c
+++ b/drivers/staging/android/binder.c
@@ -29,6 +29,7 @@
 #include <linux/proc_fs.h>
 #include <linux/rbtree.h>
 #include <linux/sched.h>
+#include <linux/seq_file.h>
 #include <linux/uaccess.h>
 #include <linux/vmalloc.h>
 #include <linux/slab.h>
@@ -48,8 +49,22 @@ static struct binder_node *binder_context_mgr_node;
 static uid_t binder_context_mgr_uid = -1;
 static int binder_last_id;
 
-static int binder_read_proc_proc(char *page, char **start, off_t off,
-				 int count, int *eof, void *data);
+#define BINDER_DEBUG_ENTRY(name) \
+static int binder_##name##_open(struct inode *inode, struct file *file) \
+{ \
+	return single_open(file, binder_##name##_show, PDE(inode)->data); \
+} \
+\
+static const struct file_operations binder_##name##_fops = { \
+	.owner = THIS_MODULE, \
+	.open = binder_##name##_open, \
+	.read = seq_read, \
+	.llseek = seq_lseek, \
+	.release = single_release, \
+}
+
+static int binder_proc_show(struct seq_file *m, void *unused);
+BINDER_DEBUG_ENTRY(proc);
 
 /* This is only defined in include/asm-arm/sizes.h */
 #ifndef SZ_1K
@@ -2880,9 +2895,9 @@ static int binder_open(struct inode *nodp, struct file *filp)
 		char strbuf[11];
 		snprintf(strbuf, sizeof(strbuf), "%u", proc->pid);
 		remove_proc_entry(strbuf, binder_proc_dir_entry_proc);
-		create_proc_read_entry(strbuf, S_IRUGO,
-				       binder_proc_dir_entry_proc,
-				       binder_read_proc_proc, proc);
+		proc_create_data(strbuf, S_IRUGO,
+				 binder_proc_dir_entry_proc,
+				 &binder_proc_fops, proc);
 	}
 
 	return 0;
@@ -3105,49 +3120,41 @@ binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer)
 	mutex_unlock(&binder_deferred_lock);
 }
 
-static char *print_binder_transaction(char *buf, char *end, const char *prefix,
-				      struct binder_transaction *t)
-{
-	buf += snprintf(buf, end - buf,
-			"%s %d: %p from %d:%d to %d:%d code %x "
-			"flags %x pri %ld r%d",
-			prefix, t->debug_id, t,
-			t->from ? t->from->proc->pid : 0,
-			t->from ? t->from->pid : 0,
-			t->to_proc ? t->to_proc->pid : 0,
-			t->to_thread ? t->to_thread->pid : 0,
-			t->code, t->flags, t->priority, t->need_reply);
-	if (buf >= end)
-		return buf;
+static void print_binder_transaction(struct seq_file *m, const char *prefix,
+				     struct binder_transaction *t)
+{
+	seq_printf(m,
+		   "%s %d: %p from %d:%d to %d:%d code %x flags %x pri %ld r%d",
+		   prefix, t->debug_id, t,
+		   t->from ? t->from->proc->pid : 0,
+		   t->from ? t->from->pid : 0,
+		   t->to_proc ? t->to_proc->pid : 0,
+		   t->to_thread ? t->to_thread->pid : 0,
+		   t->code, t->flags, t->priority, t->need_reply);
 	if (t->buffer == NULL) {
-		buf += snprintf(buf, end - buf, " buffer free\n");
-		return buf;
-	}
-	if (t->buffer->target_node) {
-		buf += snprintf(buf, end - buf, " node %d",
-				t->buffer->target_node->debug_id);
-		if (buf >= end)
-			return buf;
+		seq_puts(m, " buffer free\n");
+		return;
 	}
-	buf += snprintf(buf, end - buf, " size %zd:%zd data %p\n",
-			t->buffer->data_size, t->buffer->offsets_size,
-			t->buffer->data);
-	return buf;
+	if (t->buffer->target_node)
+		seq_printf(m, " node %d",
+			   t->buffer->target_node->debug_id);
+	seq_printf(m, " size %zd:%zd data %p\n",
+		   t->buffer->data_size, t->buffer->offsets_size,
+		   t->buffer->data);
 }
 
-static char *print_binder_buffer(char *buf, char *end, const char *prefix,
-				 struct binder_buffer *buffer)
+static void print_binder_buffer(struct seq_file *m, const char *prefix,
+				struct binder_buffer *buffer)
 {
-	buf += snprintf(buf, end - buf, "%s %d: %p size %zd:%zd %s\n",
-			prefix, buffer->debug_id, buffer->data,
-			buffer->data_size, buffer->offsets_size,
-			buffer->transaction ? "active" : "delivered");
-	return buf;
+	seq_printf(m, "%s %d: %p size %zd:%zd %s\n",
+		   prefix, buffer->debug_id, buffer->data,
+		   buffer->data_size, buffer->offsets_size,
+		   buffer->transaction ? "active" : "delivered");
 }
 
-static char *print_binder_work(char *buf, char *end, const char *prefix,
-			       const char *transaction_prefix,
-			       struct binder_work *w)
+static void print_binder_work(struct seq_file *m, const char *prefix,
+			      const char *transaction_prefix,
+			      struct binder_work *w)
 {
 	struct binder_node *node;
 	struct binder_transaction *t;
@@ -3155,79 +3162,65 @@ static char *print_binder_work(char *buf, char *end, const char *prefix,
 	switch (w->type) {
 	case BINDER_WORK_TRANSACTION:
 		t = container_of(w, struct binder_transaction, work);
-		buf = print_binder_transaction(buf, end, transaction_prefix, t);
+		print_binder_transaction(m, transaction_prefix, t);
 		break;
 	case BINDER_WORK_TRANSACTION_COMPLETE:
-		buf += snprintf(buf, end - buf,
-				"%stransaction complete\n", prefix);
+		seq_printf(m, "%stransaction complete\n", prefix);
 		break;
 	case BINDER_WORK_NODE:
 		node = container_of(w, struct binder_node, work);
-		buf += snprintf(buf, end - buf, "%snode work %d: u%p c%p\n",
-				prefix, node->debug_id, node->ptr,
-				node->cookie);
+		seq_printf(m, "%snode work %d: u%p c%p\n",
+			   prefix, node->debug_id, node->ptr, node->cookie);
 		break;
 	case BINDER_WORK_DEAD_BINDER:
-		buf += snprintf(buf, end - buf, "%shas dead binder\n", prefix);
+		seq_printf(m, "%shas dead binder\n", prefix);
 		break;
 	case BINDER_WORK_DEAD_BINDER_AND_CLEAR:
-		buf += snprintf(buf, end - buf,
-				"%shas cleared dead binder\n", prefix);
+		seq_printf(m, "%shas cleared dead binder\n", prefix);
 		break;
 	case BINDER_WORK_CLEAR_DEATH_NOTIFICATION:
-		buf += snprintf(buf, end - buf,
-				"%shas cleared death notification\n", prefix);
+		seq_printf(m, "%shas cleared death notification\n", prefix);
 		break;
 	default:
-		buf += snprintf(buf, end - buf, "%sunknown work: type %d\n",
-				prefix, w->type);
+		seq_printf(m, "%sunknown work: type %d\n", prefix, w->type);
 		break;
 	}
-	return buf;
 }
 
-static char *print_binder_thread(char *buf, char *end,
-				 struct binder_thread *thread,
-				 int print_always)
+static void print_binder_thread(struct seq_file *m,
+				struct binder_thread *thread,
+				int print_always)
 {
 	struct binder_transaction *t;
 	struct binder_work *w;
-	char *start_buf = buf;
-	char *header_buf;
+	size_t start_pos = m->count;
+	size_t header_pos;
 
-	buf += snprintf(buf, end - buf, "  thread %d: l %02x\n",
-			thread->pid, thread->looper);
-	header_buf = buf;
+	seq_printf(m, "  thread %d: l %02x\n", thread->pid, thread->looper);
+	header_pos = m->count;
 	t = thread->transaction_stack;
 	while (t) {
-		if (buf >= end)
-			break;
 		if (t->from == thread) {
-			buf = print_binder_transaction(buf, end,
-						"    outgoing transaction", t);
+			print_binder_transaction(m,
+						 "    outgoing transaction", t);
 			t = t->from_parent;
 		} else if (t->to_thread == thread) {
-			buf = print_binder_transaction(buf, end,
-						"    incoming transaction", t);
+			print_binder_transaction(m,
+						 "    incoming transaction", t);
 			t = t->to_parent;
 		} else {
-			buf = print_binder_transaction(buf, end,
-						"    bad transaction", t);
+			print_binder_transaction(m, "    bad transaction", t);
 			t = NULL;
 		}
 	}
 	list_for_each_entry(w, &thread->todo, entry) {
-		if (buf >= end)
-			break;
-		buf = print_binder_work(buf, end, "    ",
-					"    pending transaction", w);
+		print_binder_work(m, "    ", "    pending transaction", w);
 	}
-	if (!print_always && buf == header_buf)
-		buf = start_buf;
-	return buf;
+	if (!print_always && m->count == header_pos)
+		m->count = start_pos;
 }
 
-static char *print_binder_node(char *buf, char *end, struct binder_node *node)
+static void print_binder_node(struct seq_file *m, struct binder_node *node)
 {
 	struct binder_ref *ref;
 	struct hlist_node *pos;
@@ -3238,100 +3231,67 @@ static char *print_binder_node(char *buf, char *end, struct binder_node *node)
 	hlist_for_each_entry(ref, pos, &node->refs, node_entry)
 		count++;
 
-	buf += snprintf(buf, end - buf,
-			"  node %d: u%p c%p hs %d hw %d ls %d lw %d "
-			"is %d iw %d",
-			node->debug_id, node->ptr, node->cookie,
-			node->has_strong_ref, node->has_weak_ref,
-			node->local_strong_refs, node->local_weak_refs,
-			node->internal_strong_refs, count);
-	if (buf >= end)
-		return buf;
+	seq_printf(m, "  node %d: u%p c%p hs %d hw %d ls %d lw %d is %d iw %d",
+		   node->debug_id, node->ptr, node->cookie,
+		   node->has_strong_ref, node->has_weak_ref,
+		   node->local_strong_refs, node->local_weak_refs,
+		   node->internal_strong_refs, count);
 	if (count) {
-		buf += snprintf(buf, end - buf, " proc");
-		if (buf >= end)
-			return buf;
-		hlist_for_each_entry(ref, pos, &node->refs, node_entry) {
-			buf += snprintf(buf, end - buf, " %d", ref->proc->pid);
-			if (buf >= end)
-				return buf;
-		}
+		seq_puts(m, " proc");
+		hlist_for_each_entry(ref, pos, &node->refs, node_entry)
+			seq_printf(m, " %d", ref->proc->pid);
 	}
-	buf += snprintf(buf, end - buf, "\n");
-	list_for_each_entry(w, &node->async_todo, entry) {
-		if (buf >= end)
-			break;
-		buf = print_binder_work(buf, end, "    ",
-					"    pending async transaction", w);
-	}
-	return buf;
+	seq_puts(m, "\n");
+	list_for_each_entry(w, &node->async_todo, entry)
+		print_binder_work(m, "    ",
+				  "    pending async transaction", w);
 }
 
-static char *print_binder_ref(char *buf, char *end, struct binder_ref *ref)
+static void print_binder_ref(struct seq_file *m, struct binder_ref *ref)
 {
-	buf += snprintf(buf, end - buf,
-			"  ref %d: desc %d %snode %d s %d w %d d %p\n",
-			ref->debug_id, ref->desc,
-			ref->node->proc ? "" : "dead ", ref->node->debug_id,
-			ref->strong, ref->weak, ref->death);
-	return buf;
+	seq_printf(m, "  ref %d: desc %d %snode %d s %d w %d d %p\n",
+		   ref->debug_id, ref->desc, ref->node->proc ? "" : "dead ",
+		   ref->node->debug_id, ref->strong, ref->weak, ref->death);
 }
 
-static char *print_binder_proc(char *buf, char *end,
-			       struct binder_proc *proc, int print_all)
+static void print_binder_proc(struct seq_file *m,
+			      struct binder_proc *proc, int print_all)
 {
 	struct binder_work *w;
 	struct rb_node *n;
-	char *start_buf = buf;
-	char *header_buf;
-
-	buf += snprintf(buf, end - buf, "proc %d\n", proc->pid);
-	header_buf = buf;
-
-	for (n = rb_first(&proc->threads);
-	     n != NULL && buf < end;
-	     n = rb_next(n))
-		buf = print_binder_thread(buf, end,
-					  rb_entry(n, struct binder_thread,
-						   rb_node), print_all);
-	for (n = rb_first(&proc->nodes);
-	     n != NULL && buf < end;
-	     n = rb_next(n)) {
+	size_t start_pos = m->count;
+	size_t header_pos;
+
+	seq_printf(m, "proc %d\n", proc->pid);
+	header_pos = m->count;
+
+	for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n))
+		print_binder_thread(m, rb_entry(n, struct binder_thread,
+						rb_node), print_all);
+	for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n)) {
 		struct binder_node *node = rb_entry(n, struct binder_node,
 						    rb_node);
 		if (print_all || node->has_async_transaction)
-			buf = print_binder_node(buf, end, node);
+			print_binder_node(m, node);
 	}
 	if (print_all) {
 		for (n = rb_first(&proc->refs_by_desc);
-		     n != NULL && buf < end;
+		     n != NULL;
 		     n = rb_next(n))
-			buf = print_binder_ref(buf, end,
-					       rb_entry(n, struct binder_ref,
-							rb_node_desc));
-	}
-	for (n = rb_first(&proc->allocated_buffers);
-	     n != NULL && buf < end;
-	     n = rb_next(n))
-		buf = print_binder_buffer(buf, end, "  buffer",
-					  rb_entry(n, struct binder_buffer,
-						   rb_node));
-	list_for_each_entry(w, &proc->todo, entry) {
-		if (buf >= end)
-			break;
-		buf = print_binder_work(buf, end, "  ",
-					"  pending transaction", w);
+			print_binder_ref(m, rb_entry(n, struct binder_ref,
+						     rb_node_desc));
 	}
+	for (n = rb_first(&proc->allocated_buffers); n != NULL; n = rb_next(n))
+		print_binder_buffer(m, "  buffer",
+				    rb_entry(n, struct binder_buffer, rb_node));
+	list_for_each_entry(w, &proc->todo, entry)
+		print_binder_work(m, "  ", "  pending transaction", w);
 	list_for_each_entry(w, &proc->delivered_death, entry) {
-		if (buf >= end)
-			break;
-		buf += snprintf(buf, end - buf,
-				"  has delivered dead binder\n");
+		seq_puts(m, "  has delivered dead binder\n");
 		break;
 	}
-	if (!print_all && buf == header_buf)
-		buf = start_buf;
-	return buf;
+	if (!print_all && m->count == header_pos)
+		m->count = start_pos;
 }
 
 static const char *binder_return_strings[] = {
@@ -3385,79 +3345,61 @@ static const char *binder_objstat_strings[] = {
 	"transaction_complete"
 };
 
-static char *print_binder_stats(char *buf, char *end, const char *prefix,
-				struct binder_stats *stats)
+static void print_binder_stats(struct seq_file *m, const char *prefix,
+			       struct binder_stats *stats)
 {
 	int i;
 
 	BUILD_BUG_ON(ARRAY_SIZE(stats->bc) !=
-			ARRAY_SIZE(binder_command_strings));
+		     ARRAY_SIZE(binder_command_strings));
 	for (i = 0; i < ARRAY_SIZE(stats->bc); i++) {
 		if (stats->bc[i])
-			buf += snprintf(buf, end - buf, "%s%s: %d\n", prefix,
-					binder_command_strings[i],
-					stats->bc[i]);
-		if (buf >= end)
-			return buf;
+			seq_printf(m, "%s%s: %d\n", prefix,
+				   binder_command_strings[i], stats->bc[i]);
 	}
 
 	BUILD_BUG_ON(ARRAY_SIZE(stats->br) !=
-			ARRAY_SIZE(binder_return_strings));
+		     ARRAY_SIZE(binder_return_strings));
 	for (i = 0; i < ARRAY_SIZE(stats->br); i++) {
 		if (stats->br[i])
-			buf += snprintf(buf, end - buf, "%s%s: %d\n", prefix,
-					binder_return_strings[i], stats->br[i]);
-		if (buf >= end)
-			return buf;
+			seq_printf(m, "%s%s: %d\n", prefix,
+				   binder_return_strings[i], stats->br[i]);
 	}
 
 	BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) !=
-			ARRAY_SIZE(binder_objstat_strings));
+		     ARRAY_SIZE(binder_objstat_strings));
 	BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) !=
-			ARRAY_SIZE(stats->obj_deleted));
+		     ARRAY_SIZE(stats->obj_deleted));
 	for (i = 0; i < ARRAY_SIZE(stats->obj_created); i++) {
 		if (stats->obj_created[i] || stats->obj_deleted[i])
-			buf += snprintf(buf, end - buf,
-					"%s%s: active %d total %d\n", prefix,
-					binder_objstat_strings[i],
-					stats->obj_created[i] -
-						stats->obj_deleted[i],
-					stats->obj_created[i]);
-		if (buf >= end)
-			return buf;
+			seq_printf(m, "%s%s: active %d total %d\n", prefix,
+				binder_objstat_strings[i],
+				stats->obj_created[i] - stats->obj_deleted[i],
+				stats->obj_created[i]);
 	}
-	return buf;
 }
 
-static char *print_binder_proc_stats(char *buf, char *end,
-				     struct binder_proc *proc)
+static void print_binder_proc_stats(struct seq_file *m,
+				    struct binder_proc *proc)
 {
 	struct binder_work *w;
 	struct rb_node *n;
 	int count, strong, weak;
 
-	buf += snprintf(buf, end - buf, "proc %d\n", proc->pid);
-	if (buf >= end)
-		return buf;
+	seq_printf(m, "proc %d\n", proc->pid);
 	count = 0;
 	for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n))
 		count++;
-	buf += snprintf(buf, end - buf, "  threads: %d\n", count);
-	if (buf >= end)
-		return buf;
-	buf += snprintf(buf, end - buf, "  requested threads: %d+%d/%d\n"
+	seq_printf(m, "  threads: %d\n", count);
+	seq_printf(m, "  requested threads: %d+%d/%d\n"
 			"  ready threads %d\n"
 			"  free async space %zd\n", proc->requested_threads,
 			proc->requested_threads_started, proc->max_threads,
 			proc->ready_threads, proc->free_async_space);
-	if (buf >= end)
-		return buf;
 	count = 0;
 	for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n))
 		count++;
-	buf += snprintf(buf, end - buf, "  nodes: %d\n", count);
-	if (buf >= end)
-		return buf;
+	seq_printf(m, "  nodes: %d\n", count);
 	count = 0;
 	strong = 0;
 	weak = 0;
@@ -3468,17 +3410,12 @@ static char *print_binder_proc_stats(char *buf, char *end,
 		strong += ref->strong;
 		weak += ref->weak;
 	}
-	buf += snprintf(buf, end - buf, "  refs: %d s %d w %d\n",
-			count, strong, weak);
-	if (buf >= end)
-		return buf;
+	seq_printf(m, "  refs: %d s %d w %d\n", count, strong, weak);
 
 	count = 0;
 	for (n = rb_first(&proc->allocated_buffers); n != NULL; n = rb_next(n))
 		count++;
-	buf += snprintf(buf, end - buf, "  buffers: %d\n", count);
-	if (buf >= end)
-		return buf;
+	seq_printf(m, "  buffers: %d\n", count);
 
 	count = 0;
 	list_for_each_entry(w, &proc->todo, entry) {
@@ -3490,222 +3427,110 @@ static char *print_binder_proc_stats(char *buf, char *end,
 			break;
 		}
 	}
-	buf += snprintf(buf, end - buf, "  pending transactions: %d\n", count);
-	if (buf >= end)
-		return buf;
-
-	buf = print_binder_stats(buf, end, "  ", &proc->stats);
+	seq_printf(m, "  pending transactions: %d\n", count);
 
-	return buf;
+	print_binder_stats(m, "  ", &proc->stats);
 }
 
 
-static int binder_read_proc_state(char *page, char **start, off_t off,
-				  int count, int *eof, void *data)
+static int binder_state_show(struct seq_file *m, void *unused)
 {
 	struct binder_proc *proc;
 	struct hlist_node *pos;
 	struct binder_node *node;
-	int len = 0;
-	char *buf = page;
-	char *end = page + PAGE_SIZE;
 	int do_lock = !binder_debug_no_lock;
 
-	if (off)
-		return 0;
-
 	if (do_lock)
 		mutex_lock(&binder_lock);
 
-	buf += snprintf(buf, end - buf, "binder state:\n");
+	seq_puts(m, "binder state:\n");
 
 	if (!hlist_empty(&binder_dead_nodes))
-		buf += snprintf(buf, end - buf, "dead nodes:\n");
-	hlist_for_each_entry(node, pos, &binder_dead_nodes, dead_node) {
-		if (buf >= end)
-			break;
-		buf = print_binder_node(buf, end, node);
-	}
+		seq_puts(m, "dead nodes:\n");
+	hlist_for_each_entry(node, pos, &binder_dead_nodes, dead_node)
+		print_binder_node(m, node);
 
-	hlist_for_each_entry(proc, pos, &binder_procs, proc_node) {
-		if (buf >= end)
-			break;
-		buf = print_binder_proc(buf, end, proc, 1);
-	}
+	hlist_for_each_entry(proc, pos, &binder_procs, proc_node)
+		print_binder_proc(m, proc, 1);
 	if (do_lock)
 		mutex_unlock(&binder_lock);
-	if (buf > page + PAGE_SIZE)
-		buf = page + PAGE_SIZE;
-
-	*start = page + off;
-
-	len = buf - page;
-	if (len > off)
-		len -= off;
-	else
-		len = 0;
-
-	return len < count ? len  : count;
+	return 0;
 }
 
-static int binder_read_proc_stats(char *page, char **start, off_t off,
-				  int count, int *eof, void *data)
+static int binder_stats_show(struct seq_file *m, void *unused)
 {
 	struct binder_proc *proc;
 	struct hlist_node *pos;
-	int len = 0;
-	char *p = page;
 	int do_lock = !binder_debug_no_lock;
 
-	if (off)
-		return 0;
-
 	if (do_lock)
 		mutex_lock(&binder_lock);
 
-	p += snprintf(p, PAGE_SIZE, "binder stats:\n");
+	seq_puts(m, "binder stats:\n");
 
-	p = print_binder_stats(p, page + PAGE_SIZE, "", &binder_stats);
+	print_binder_stats(m, "", &binder_stats);
 
-	hlist_for_each_entry(proc, pos, &binder_procs, proc_node) {
-		if (p >= page + PAGE_SIZE)
-			break;
-		p = print_binder_proc_stats(p, page + PAGE_SIZE, proc);
-	}
+	hlist_for_each_entry(proc, pos, &binder_procs, proc_node)
+		print_binder_proc_stats(m, proc);
 	if (do_lock)
 		mutex_unlock(&binder_lock);
-	if (p > page + PAGE_SIZE)
-		p = page + PAGE_SIZE;
-
-	*start = page + off;
-
-	len = p - page;
-	if (len > off)
-		len -= off;
-	else
-		len = 0;
-
-	return len < count ? len  : count;
+	return 0;
 }
 
-static int binder_read_proc_transactions(char *page, char **start, off_t off,
-					 int count, int *eof, void *data)
+static int binder_transactions_show(struct seq_file *m, void *unused)
 {
 	struct binder_proc *proc;
 	struct hlist_node *pos;
-	int len = 0;
-	char *buf = page;
-	char *end = page + PAGE_SIZE;
 	int do_lock = !binder_debug_no_lock;
 
-	if (off)
-		return 0;
-
 	if (do_lock)
 		mutex_lock(&binder_lock);
 
-	buf += snprintf(buf, end - buf, "binder transactions:\n");
-	hlist_for_each_entry(proc, pos, &binder_procs, proc_node) {
-		if (buf >= end)
-			break;
-		buf = print_binder_proc(buf, end, proc, 0);
-	}
+	seq_puts(m, "binder transactions:\n");
+	hlist_for_each_entry(proc, pos, &binder_procs, proc_node)
+		print_binder_proc(m, proc, 0);
 	if (do_lock)
 		mutex_unlock(&binder_lock);
-	if (buf > page + PAGE_SIZE)
-		buf = page + PAGE_SIZE;
-
-	*start = page + off;
-
-	len = buf - page;
-	if (len > off)
-		len -= off;
-	else
-		len = 0;
-
-	return len < count ? len  : count;
+	return 0;
 }
 
-static int binder_read_proc_proc(char *page, char **start, off_t off,
-				 int count, int *eof, void *data)
+static int binder_proc_show(struct seq_file *m, void *unused)
 {
-	struct binder_proc *proc = data;
-	int len = 0;
-	char *p = page;
+	struct binder_proc *proc = m->private;
 	int do_lock = !binder_debug_no_lock;
 
-	if (off)
-		return 0;
-
 	if (do_lock)
 		mutex_lock(&binder_lock);
-	p += snprintf(p, PAGE_SIZE, "binder proc state:\n");
-	p = print_binder_proc(p, page + PAGE_SIZE, proc, 1);
+	seq_puts(m, "binder proc state:\n");
+	print_binder_proc(m, proc, 1);
 	if (do_lock)
 		mutex_unlock(&binder_lock);
-
-	if (p > page + PAGE_SIZE)
-		p = page + PAGE_SIZE;
-	*start = page + off;
-
-	len = p - page;
-	if (len > off)
-		len -= off;
-	else
-		len = 0;
-
-	return len < count ? len  : count;
+	return 0;
 }
 
-static char *print_binder_transaction_log_entry(char *buf, char *end,
+static void print_binder_transaction_log_entry(struct seq_file *m,
 					struct binder_transaction_log_entry *e)
 {
-	buf += snprintf(buf, end - buf,
-			"%d: %s from %d:%d to %d:%d node %d handle %d "
-			"size %d:%d\n",
-			e->debug_id, (e->call_type == 2) ? "reply" :
-			((e->call_type == 1) ? "async" : "call "), e->from_proc,
-			e->from_thread, e->to_proc, e->to_thread, e->to_node,
-			e->target_handle, e->data_size, e->offsets_size);
-	return buf;
+	seq_printf(m,
+		   "%d: %s from %d:%d to %d:%d node %d handle %d size %d:%d\n",
+		   e->debug_id, (e->call_type == 2) ? "reply" :
+		   ((e->call_type == 1) ? "async" : "call "), e->from_proc,
+		   e->from_thread, e->to_proc, e->to_thread, e->to_node,
+		   e->target_handle, e->data_size, e->offsets_size);
 }
 
-static int binder_read_proc_transaction_log(
-	char *page, char **start, off_t off, int count, int *eof, void *data)
+static int binder_transaction_log_show(struct seq_file *m, void *unused)
 {
-	struct binder_transaction_log *log = data;
-	int len = 0;
+	struct binder_transaction_log *log = m->private;
 	int i;
-	char *buf = page;
-	char *end = page + PAGE_SIZE;
-
-	if (off)
-		return 0;
 
 	if (log->full) {
-		for (i = log->next; i < ARRAY_SIZE(log->entry); i++) {
-			if (buf >= end)
-				break;
-			buf = print_binder_transaction_log_entry(buf, end,
-								&log->entry[i]);
-		}
+		for (i = log->next; i < ARRAY_SIZE(log->entry); i++)
+			print_binder_transaction_log_entry(m, &log->entry[i]);
 	}
-	for (i = 0; i < log->next; i++) {
-		if (buf >= end)
-			break;
-		buf = print_binder_transaction_log_entry(buf, end,
-							 &log->entry[i]);
-	}
-
-	*start = page + off;
-
-	len = buf - page;
-	if (len > off)
-		len -= off;
-	else
-		len = 0;
-
-	return len < count ? len  : count;
+	for (i = 0; i < log->next; i++)
+		print_binder_transaction_log_entry(m, &log->entry[i]);
+	return 0;
 }
 
 static const struct file_operations binder_fops = {
@@ -3724,6 +3549,11 @@ static struct miscdevice binder_miscdev = {
 	.fops = &binder_fops
 };
 
+BINDER_DEBUG_ENTRY(state);
+BINDER_DEBUG_ENTRY(stats);
+BINDER_DEBUG_ENTRY(transactions);
+BINDER_DEBUG_ENTRY(transaction_log);
+
 static int __init binder_init(void)
 {
 	int ret;
@@ -3734,31 +3564,28 @@ static int __init binder_init(void)
 						binder_proc_dir_entry_root);
 	ret = misc_register(&binder_miscdev);
 	if (binder_proc_dir_entry_root) {
-		create_proc_read_entry("state",
-				       S_IRUGO,
-				       binder_proc_dir_entry_root,
-				       binder_read_proc_state,
-				       NULL);
-		create_proc_read_entry("stats",
-				       S_IRUGO,
-				       binder_proc_dir_entry_root,
-				       binder_read_proc_stats,
-				       NULL);
-		create_proc_read_entry("transactions",
-				       S_IRUGO,
-				       binder_proc_dir_entry_root,
-				       binder_read_proc_transactions,
-				       NULL);
-		create_proc_read_entry("transaction_log",
-				       S_IRUGO,
-				       binder_proc_dir_entry_root,
-				       binder_read_proc_transaction_log,
-				       &binder_transaction_log);
-		create_proc_read_entry("failed_transaction_log",
-				       S_IRUGO,
-				       binder_proc_dir_entry_root,
-				       binder_read_proc_transaction_log,
-				       &binder_transaction_log_failed);
+		proc_create("state",
+			    S_IRUGO,
+			    binder_proc_dir_entry_root,
+			    &binder_state_fops);
+		proc_create("stats",
+			    S_IRUGO,
+			    binder_proc_dir_entry_root,
+			    &binder_stats_fops);
+		proc_create("transactions",
+			    S_IRUGO,
+			    binder_proc_dir_entry_root,
+			    &binder_transactions_fops);
+		proc_create_data("transaction_log",
+				 S_IRUGO,
+				 binder_proc_dir_entry_root,
+				 &binder_transaction_log_fops,
+				 &binder_transaction_log);
+		proc_create_data("failed_transaction_log",
+				 S_IRUGO,
+				 binder_proc_dir_entry_root,
+				 &binder_transaction_log_fops,
+				 &binder_transaction_log_failed);
 	}
 	return ret;
 }