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 <[email protected]> Tested-by: Eric B Munson <[email protected]> Acked-by: Eric B Munson <[email protected]> Reviewed-by: KAMEZAWA Hiroyuki <[email protected]> Cc: Hugh Dickins <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
chewitt · Mar 23, 2011 · c69dbfb · c69dbfb
1 parent 9c8100e
commit c69dbfb
Showing 1 changed file with 8 additions and 7 deletions.
diff --git 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);