path: root/ipc/util.h
diff options
authorDavidlohr Bueso <>2014-01-27 17:07:09 -0800
committerLinus Torvalds <>2014-01-27 21:02:40 -0800
commitdaf948c7d1a080041ae19aca07625efec670695a (patch)
treeaf17f8452bcd1e6c709f4875c4a04d95d4b6b62f /ipc/util.h
parent8dc5cd04f97b5d6cad64df1e7dc5c49110b4d5e3 (diff)
ipc: delete seq_max field in struct ipc_ids
This field is only used to reset the ids seq number if it exceeds the smaller of INT_MAX/SEQ_MULTIPLIER and USHRT_MAX, and can therefore be moved out of the structure and into its own macro. Since each ipc_namespace contains a table of 3 pointers to struct ipc_ids we can save space in instruction text: text data bss dec hex filename 56232 2348 24 58604 e4ec ipc/built-in.o 56216 2348 24 58588 e4dc ipc/built-in.o-after Signed-off-by: Davidlohr Bueso <> Reviewed-by: Jonathan Gonzalez <> Cc: Aswin Chandramouleeswaran <> Cc: Rik van Riel <> Acked-by: Manfred Spraul <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
Diffstat (limited to 'ipc/util.h')
1 files changed, 1 insertions, 0 deletions
diff --git a/ipc/util.h b/ipc/util.h
index d64db3e56f7d..9c47d6f6c7b4 100644
--- a/ipc/util.h
+++ b/ipc/util.h
@@ -100,6 +100,7 @@ void __init ipc_init_proc_interface(const char *path, const char *header,
#define ipcid_to_idx(id) ((id) % SEQ_MULTIPLIER)
#define ipcid_to_seqx(id) ((id) / SEQ_MULTIPLIER)
/* must be called with ids->rwsem acquired for writing */
int ipc_addid(struct ipc_ids *, struct kern_ipc_perm *, int);