[PATCH] ipc: add generic struct ipc_ids seq_file iteration

The following two patches convert /proc/sysvipc/* to use seq_file.

This gives us the following:

 - Self-consistent IPC records in proc.
 - O(n) reading of the files themselves.

This patch:

Add a generic method for ipc types to be displayed using seq_file.  This
patch abstracts out seq_file iterating over struct ipc_ids into ipc/util.c

Signed-off-by: Mike Waychison <mikew@google.com>
Cc: Manfred Spraul <manfred@colorfullife.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/ipc/util.h b/ipc/util.h
index 44348ca5a707..fc9a28be0797 100644
--- a/ipc/util.h
+++ b/ipc/util.h
@@ -30,7 +30,15 @@ struct ipc_ids {
         struct ipc_id_ary* entries;
 };
 
+struct seq_file;
 void __init ipc_init_ids(struct ipc_ids* ids, int size);
+#ifdef CONFIG_PROC_FS
+void __init ipc_init_proc_interface(const char *path, const char *header,
+                                    struct ipc_ids *ids,
+                                    int (*show)(struct seq_file *, void *));
+#else
+#define ipc_init_proc_interface(path, header, ids, show) do {} while (0)
+#endif
 
 /* must be called with ids->sem acquired.*/
 int ipc_findkey(struct ipc_ids* ids, key_t key);