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Diffstat (limited to 'arch/arm/mm/vmregion.c')
-rw-r--r--arch/arm/mm/vmregion.c76
1 files changed, 75 insertions, 1 deletions
diff --git a/arch/arm/mm/vmregion.c b/arch/arm/mm/vmregion.c
index 036fdbf..a631016 100644
--- a/arch/arm/mm/vmregion.c
+++ b/arch/arm/mm/vmregion.c
@@ -1,5 +1,8 @@
+#include <linux/fs.h>
#include <linux/spinlock.h>
#include <linux/list.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
#include <linux/slab.h>
#include "vmregion.h"
@@ -36,7 +39,7 @@
struct arm_vmregion *
arm_vmregion_alloc(struct arm_vmregion_head *head, size_t align,
- size_t size, gfp_t gfp)
+ size_t size, gfp_t gfp, const void *caller)
{
unsigned long start = head->vm_start, addr = head->vm_end;
unsigned long flags;
@@ -52,6 +55,8 @@ arm_vmregion_alloc(struct arm_vmregion_head *head, size_t align,
if (!new)
goto out;
+ new->caller = caller;
+
spin_lock_irqsave(&head->vm_lock, flags);
addr = rounddown(addr - size, align);
@@ -129,3 +134,72 @@ void arm_vmregion_free(struct arm_vmregion_head *head, struct arm_vmregion *c)
kfree(c);
}
+
+#ifdef CONFIG_PROC_FS
+static int arm_vmregion_show(struct seq_file *m, void *p)
+{
+ struct arm_vmregion *c = list_entry(p, struct arm_vmregion, vm_list);
+
+ seq_printf(m, "0x%08lx-0x%08lx %7lu", c->vm_start, c->vm_end,
+ c->vm_end - c->vm_start);
+ if (c->caller)
+ seq_printf(m, " %pS", (void *)c->caller);
+ seq_putc(m, '\n');
+ return 0;
+}
+
+static void *arm_vmregion_start(struct seq_file *m, loff_t *pos)
+{
+ struct arm_vmregion_head *h = m->private;
+ spin_lock_irq(&h->vm_lock);
+ return seq_list_start(&h->vm_list, *pos);
+}
+
+static void *arm_vmregion_next(struct seq_file *m, void *p, loff_t *pos)
+{
+ struct arm_vmregion_head *h = m->private;
+ return seq_list_next(p, &h->vm_list, pos);
+}
+
+static void arm_vmregion_stop(struct seq_file *m, void *p)
+{
+ struct arm_vmregion_head *h = m->private;
+ spin_unlock_irq(&h->vm_lock);
+}
+
+static const struct seq_operations arm_vmregion_ops = {
+ .start = arm_vmregion_start,
+ .stop = arm_vmregion_stop,
+ .next = arm_vmregion_next,
+ .show = arm_vmregion_show,
+};
+
+static int arm_vmregion_open(struct inode *inode, struct file *file)
+{
+ struct arm_vmregion_head *h = PDE(inode)->data;
+ int ret = seq_open(file, &arm_vmregion_ops);
+ if (!ret) {
+ struct seq_file *m = file->private_data;
+ m->private = h;
+ }
+ return ret;
+}
+
+static const struct file_operations arm_vmregion_fops = {
+ .open = arm_vmregion_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+int arm_vmregion_create_proc(const char *path, struct arm_vmregion_head *h)
+{
+ proc_create_data(path, S_IRUSR, NULL, &arm_vmregion_fops, h);
+ return 0;
+}
+#else
+int arm_vmregion_create_proc(const char *path, struct arm_vmregion_head *h)
+{
+ return 0;
+}
+#endif