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authorCesar Eduardo Barros <cesarb@cesarb.net>2011-03-22 16:33:35 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-22 17:44:08 -0700
commitc69dbfb84e88503468b6c481aecdb48d76ad5bc6 (patch)
treeade74b75b80a0481ae6309c9cb0bc7298db13ad7 /mm/swapfile.c
parent9c8100ef26ba9012b8677a383179a0cf169fc7f3 (diff)
downloadlinux-c69dbfb84e88503468b6c481aecdb48d76ad5bc6.tar.gz
sys_swapon: move printk outside lock
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(). To be able to make both share the same code, move the printk() call in the middle of it to just after it. 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: 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.c15
1 files changed, 8 insertions, 7 deletions
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 9e3613b9161..df3dc7a3c2e 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -2144,13 +2144,6 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
nr_swap_pages += p->pages;
total_swap_pages += p->pages;
- printk(KERN_INFO "Adding %uk swap on %s. "
- "Priority:%d extents:%d across:%lluk %s%s\n",
- p->pages<<(PAGE_SHIFT-10), name, p->prio,
- nr_extents, (unsigned long long)span<<(PAGE_SHIFT-10),
- (p->flags & SWP_SOLIDSTATE) ? "SS" : "",
- (p->flags & SWP_DISCARDABLE) ? "D" : "");
-
/* insert swap space into swap_list: */
prev = -1;
for (i = swap_list.head; i >= 0; i = swap_info[i]->next) {
@@ -2164,6 +2157,14 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
else
swap_info[prev]->next = p->type;
spin_unlock(&swap_lock);
+
+ printk(KERN_INFO "Adding %uk swap on %s. "
+ "Priority:%d extents:%d across:%lluk %s%s\n",
+ p->pages<<(PAGE_SHIFT-10), name, p->prio,
+ nr_extents, (unsigned long long)span<<(PAGE_SHIFT-10),
+ (p->flags & SWP_SOLIDSTATE) ? "SS" : "",
+ (p->flags & SWP_DISCARDABLE) ? "D" : "");
+
mutex_unlock(&swapon_mutex);
atomic_inc(&proc_poll_event);
wake_up_interruptible(&proc_poll_wait);