xfs: use b_maps[] for discontiguous buffers

[karo-tx-linux.git] / fs / eventpoll.c

diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index cd96649bfe62da9e408dbd629f56f6452c139bc9..be56b21435f8c4e5170fdb2c0963abdd24dc9291 100644 (file)
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -38,6 +38,8 @@
 #include <asm/io.h>
 #include <asm/mman.h>
 #include <linux/atomic.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 
 /*
  * LOCKING:
@@ -783,8 +785,34 @@ static unsigned int ep_eventpoll_poll(struct file *file, poll_table *wait)
        return pollflags != -1 ? pollflags : 0;
 }
 
+#ifdef CONFIG_PROC_FS
+static int ep_show_fdinfo(struct seq_file *m, struct file *f)
+{
+       struct eventpoll *ep = f->private_data;
+       struct rb_node *rbp;
+       int ret = 0;
+
+       mutex_lock(&ep->mtx);
+       for (rbp = rb_first(&ep->rbr); rbp; rbp = rb_next(rbp)) {
+               struct epitem *epi = rb_entry(rbp, struct epitem, rbn);
+
+               ret = seq_printf(m, "tfd: %8d events: %8x data: %16llx\n",
+                                epi->ffd.fd, epi->event.events,
+                                (long long)epi->event.data);
+               if (ret)
+                       break;
+       }
+       mutex_unlock(&ep->mtx);
+
+       return ret;
+}
+#endif
+
 /* File callbacks that implement the eventpoll file behaviour */
 static const struct file_operations eventpoll_fops = {
+#ifdef CONFIG_PROC_FS
+       .show_fdinfo    = ep_show_fdinfo,
+#endif
        .release        = ep_eventpoll_release,
        .poll           = ep_eventpoll_poll,
        .llseek         = noop_llseek,