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authorCesar Eduardo Barros <cesarb@cesarb.net>2011-03-22 16:33:36 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-22 17:44:08 -0700
commitc6a2b64ba5d09a1e281e85988ffd650655fa0f39 (patch)
tree5d3787b45e2e4ad7377c47cd601a1fcb1fec0bde /mm/swapfile.c
parentc69dbfb84e88503468b6c481aecdb48d76ad5bc6 (diff)
downloadlinux-c6a2b64ba5d09a1e281e85988ffd650655fa0f39.tar.gz
sys_swapoff: change order to match sys_swapon
The block in sys_swapon which does the final adjustments to the swap_info_struct and to swap_list is the same as the block which re-inserts it again at sys_swapoff on failure of try_to_unuse(), except for the order of the operations within the lock. Since the order should not matter, arbitrarily change sys_swapoff to match sys_swapon, in preparation to making both share the same code. Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net> Tested-by: Eric B Munson <emunson@mgebm.net> Acked-by: Eric B Munson <emunson@mgebm.net> Reviewed-by: Pekka Enberg <penberg@kernel.org> Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/swapfile.c')
-rw-r--r--mm/swapfile.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/mm/swapfile.c b/mm/swapfile.c
index df3dc7a3c2e..465d972f4c7 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -1625,6 +1625,10 @@ SYSCALL_DEFINE1(swapoff, const char __user *, specialfile)
spin_lock(&swap_lock);
if (p->prio < 0)
p->prio = --least_priority;
+ p->flags |= SWP_WRITEOK;
+ nr_swap_pages += p->pages;
+ total_swap_pages += p->pages;
+
prev = -1;
for (i = swap_list.head; i >= 0; i = swap_info[i]->next) {
if (p->prio >= swap_info[i]->prio)
@@ -1636,9 +1640,6 @@ SYSCALL_DEFINE1(swapoff, const char __user *, specialfile)
swap_list.head = swap_list.next = type;
else
swap_info[prev]->next = type;
- nr_swap_pages += p->pages;
- total_swap_pages += p->pages;
- p->flags |= SWP_WRITEOK;
spin_unlock(&swap_lock);
goto out_dput;
}