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swapfile: remove SWP_ACTIVE mask 

Remove the SWP_ACTIVE mask: it just obscures the SWP_WRITEOK flag.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Hugh Dickins 2009-01-06 14:39:48 -08:00 committed by Linus Torvalds
parent 73fd8748ab
commit 22c6f8fdb3
2 changed files with 2 additions and 3 deletions
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1
include/linux/swap.h
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@ -120,7 +120,6 @@ struct swap_extent {
enum {
SWP_USED = (1 << 0), /* is slot in swap_info[] used? */
SWP_WRITEOK = (1 << 1), /* ok to write to this swap? */
SWP_ACTIVE = (SWP_USED | SWP_WRITEOK),
/* add others here before... */
SWP_SCANNING = (1 << 8), /* refcount in scan_swap_map */
};

4
mm/swapfile.c
View File

@ -1222,7 +1222,7 @@ asmlinkage long sys_swapoff(const char __user * specialfile)
spin_lock(&swap_lock);
for (type = swap_list.head; type >= 0; type = swap_info[type].next) {
p = swap_info + type;
if ((p->flags & SWP_ACTIVE) == SWP_ACTIVE) {
if (p->flags & SWP_WRITEOK) {
if (p->swap_file->f_mapping == mapping)
break;
}
@ -1674,7 +1674,7 @@ asmlinkage long sys_swapon(const char __user * specialfile, int swap_flags)
else
p->prio = --least_priority;
p->swap_map = swap_map;
p->flags = SWP_ACTIVE;
p->flags |= SWP_WRITEOK;
nr_swap_pages += nr_good_pages;
total_swap_pages += nr_good_pages;