From 4cd9069a0a0e5fb8b007425c937642682ac96c76 Mon Sep 17 00:00:00 2001 From: Richard Kennedy Date: Wed, 25 Apr 2012 14:53:05 +0100 Subject: fs: remove 8 bytes of padding from struct writeback_control on 64 bit builds Reorder structure writeback_control to remove 8 bytes of padding on 64 bit builds, this shrinks its size from 48 to 40 bytes. This structure is always on the stack and uses C99 named initialisation, so should be safe and have a small impact on stack usage. Signed-off-by: Richard Kennedy Signed-off-by: Fengguang Wu --- include/linux/writeback.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'include/linux/writeback.h') diff --git a/include/linux/writeback.h b/include/linux/writeback.h index a2b84f598e2b..3309736ff059 100644 --- a/include/linux/writeback.h +++ b/include/linux/writeback.h @@ -58,7 +58,6 @@ extern const char *wb_reason_name[]; * in a manner such that unspecified fields are set to zero. */ struct writeback_control { - enum writeback_sync_modes sync_mode; long nr_to_write; /* Write this many pages, and decrement this for each page written */ long pages_skipped; /* Pages which were not written */ @@ -71,6 +70,8 @@ struct writeback_control { loff_t range_start; loff_t range_end; + enum writeback_sync_modes sync_mode; + unsigned for_kupdate:1; /* A kupdate writeback */ unsigned for_background:1; /* A background writeback */ unsigned tagged_writepages:1; /* tag-and-write to avoid livelock */ -- cgit