From: Hugh Dickins Date: Tue, 15 Dec 2009 01:58:41 +0000 (-0800) Subject: swap_info: change to array of pointers X-Git-Tag: v2.6.33-rc1~242 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=efa90a981bbc891efad96db2a75b5487e00852ca;p=pandora-kernel.git swap_info: change to array of pointers The swap_info_struct is only 76 or 104 bytes, but it does seem wrong to reserve an array of about 30 of them in bss, when most people will want only one. Change swap_info[] to an array of pointers. That does need a "type" field in the structure: pack it as a char with next type and short prio (aha, char is unsigned by default on PowerPC). Use the (admittedly peculiar) name "type" throughout for this index. /proc/swaps does not take swap_lock: I wouldn't want it to, but do take care with barriers when adding a new item to the array (never removed). Signed-off-by: Hugh Dickins Reviewed-by: KAMEZAWA Hiroyuki Acked-by: Rik van Riel Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Reading git-diff-tree failed