[PATCHv2 23/24] sys_swapoff: change order to match sys_swapon

[Cesar Eduardo Barros]

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@xxxxxxxxxx>
Tested-by: Eric B Munson <emunson@xxxxxxxxx>
Acked-by: Eric B Munson <emunson@xxxxxxxxx>
---
 mm/swapfile.c |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/mm/swapfile.c b/mm/swapfile.c
index 33f9102..c9825aa 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;
 	}
-- 
1.7.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/