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[PATCH] swap: freeing update swap_list.next 

This makes negligible difference in practice: but swap_list.next should not be
updated to a higher prio in the general helper swap_info_get, but rather in
swap_entry_free; and then only in the case when entry is actually freed.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Hugh Dickins 2005-09-03 15:54:36 -07:00 committed by Linus Torvalds
parent 6eb396dc4a
commit 89d09a2c80
1 changed files with 2 additions and 2 deletions
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4
mm/swapfile.c
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@ -215,8 +215,6 @@ static struct swap_info_struct * swap_info_get(swp_entry_t entry)
if (!p->swap_map[offset])
goto bad_free;
swap_list_lock();
if (p->prio > swap_info[swap_list.next].prio)
swap_list.next = type;
swap_device_lock(p);
return p;
@ -253,6 +251,8 @@ static int swap_entry_free(struct swap_info_struct *p, unsigned long offset)
p->lowest_bit = offset;
if (offset > p->highest_bit)
p->highest_bit = offset;
if (p->prio > swap_info[swap_list.next].prio)
swap_list.next = p - swap_info;
nr_swap_pages++;
p->inuse_pages--;
}