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Subject[patch 4/7] eventfd: Use sequential fdinfo engine
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andrey Vagin <avagin@openvz.org>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: James Bottomley <jbottomley@parallels.com>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Matthew Helsley <matt.helsley@gmail.com>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
---
fs/eventfd.c | 19 ++++++++++++-------
1 file changed, 12 insertions(+), 7 deletions(-)

Index: linux-2.6.git/fs/eventfd.c
===================================================================
--- linux-2.6.git.orig/fs/eventfd.c
+++ linux-2.6.git/fs/eventfd.c
@@ -287,23 +287,28 @@ static ssize_t eventfd_write(struct file
}

#ifdef CONFIG_PROC_FS
-static int eventfd_show_fdinfo(struct seq_file *m, struct file *f)
+static int seq_show(struct seq_file *m, void *v)
{
- struct eventfd_ctx *ctx = f->private_data;
- int ret;
+ struct eventfd_ctx *ctx = ((struct file *)m->private)->private_data;

spin_lock_irq(&ctx->wqh.lock);
- ret = seq_printf(m, "eventfd-count: %16llx\n",
- (unsigned long long)ctx->count);
+ seq_printf(m, "eventfd-count: %16llx\n", (unsigned long long)ctx->count);
spin_unlock_irq(&ctx->wqh.lock);

- return ret;
+ return 0;
}
+
+static struct seq_operations eventfd_fdinfo_op = {
+ .start = single_start,
+ .next = single_next,
+ .stop = single_stop,
+ .show = seq_show,
+};
#endif

static const struct file_operations eventfd_fops = {
#ifdef CONFIG_PROC_FS
- .show_fdinfo = eventfd_show_fdinfo,
+ .fdinfo_op = &eventfd_fdinfo_op,
#endif
.release = eventfd_release,
.poll = eventfd_poll,


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