提交 bdb8e3f6 编写于 作者: C Cesar Eduardo Barros 提交者: Linus Torvalds

sys_swapon: simplify error flow in setup_swap_map_and_extents()

Since there is no cleanup to do, there is no reason to jump to a label.
Return directly instead.
Signed-off-by: NCesar Eduardo Barros <cesarb@cesarb.net>
Tested-by: NEric B Munson <emunson@mgebm.net>
Acked-by: NEric B Munson <emunson@mgebm.net>
Reviewed-by: NPekka Enberg <penberg@kernel.org>
Reviewed-by: NKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
上级 915d4d7b
......@@ -1998,7 +1998,6 @@ static int setup_swap_map_and_extents(struct swap_info_struct *p,
sector_t *span)
{
int i;
int error;
unsigned int nr_good_pages;
int nr_extents;
......@@ -2006,10 +2005,8 @@ static int setup_swap_map_and_extents(struct swap_info_struct *p,
for (i = 0; i < swap_header->info.nr_badpages; i++) {
unsigned int page_nr = swap_header->info.badpages[i];
if (page_nr == 0 || page_nr > swap_header->info.last_page) {
error = -EINVAL;
goto bad_swap;
}
if (page_nr == 0 || page_nr > swap_header->info.last_page)
return -EINVAL;
if (page_nr < maxpages) {
swap_map[page_nr] = SWAP_MAP_BAD;
nr_good_pages--;
......@@ -2021,22 +2018,16 @@ static int setup_swap_map_and_extents(struct swap_info_struct *p,
p->max = maxpages;
p->pages = nr_good_pages;
nr_extents = setup_swap_extents(p, span);
if (nr_extents < 0) {
error = nr_extents;
goto bad_swap;
}
if (nr_extents < 0)
return nr_extents;
nr_good_pages = p->pages;
}
if (!nr_good_pages) {
printk(KERN_WARNING "Empty swap-file\n");
error = -EINVAL;
goto bad_swap;
return -EINVAL;
}
return nr_extents;
bad_swap:
return error;
}
SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
......
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