memsw: remove noswapaccount kernel parameter

The noswapaccount parameter has been deprecated since 2.6.38 without any
complaints from users so we can remove it.  swapaccount=0|1 can be used
instead.

As we are removing the parameter we can also clean up swapaccount because
it doesn't have to accept an empty string anymore (to match noswapaccount)
and so we can push = into __setup macro rather than checking "=1" resp.
"=0" strings

Signed-off-by: Michal Hocko <mhocko@suse.cz>
Cc: Hiroyuki Kamezawa <kamezawa.hiroyuki@gmail.com>
Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 7c6624e7a5cb50f80bcc1d92e010d8896ec92956..5438a2d7907f564b05644a93931f081de19844d3 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1777,9 +1777,6 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 
        nosoftlockup    [KNL] Disable the soft-lockup detector.
 
-       noswapaccount   [KNL] Disable accounting of swap in memory resource
-                       controller. (See Documentation/cgroups/memory.txt)
-
        nosync          [HW,M68K] Disables sync negotiation for all devices.
 
        notsc           [BUGS=X86-32] Disable Time Stamp Counter

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 010f9166fa6ea099b7ab7b5ccdefe7af8cf033f4..d5fd3dcd3f2e1f38278a73d8131cd80d7f6adc6d 100644 (file)
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -5169,19 +5169,12 @@ struct cgroup_subsys mem_cgroup_subsys = {
 static int __init enable_swap_account(char *s)
 {
        /* consider enabled if no parameter or 1 is given */
-       if (!(*s) || !strcmp(s, "=1"))
+       if (!strcmp(s, "1"))
                really_do_swap_account = 1;
-       else if (!strcmp(s, "=0"))
+       else if (!strcmp(s, "0"))
                really_do_swap_account = 0;
        return 1;
 }
-__setup("swapaccount", enable_swap_account);
+__setup("swapaccount=", enable_swap_account);
 
-static int __init disable_swap_account(char *s)
-{
-       printk_once("noswapaccount is deprecated and will be removed in 2.6.40. Use swapaccount=0 instead\n");
-       enable_swap_account("=0");
-       return 1;
-}
-__setup("noswapaccount", disable_swap_account);
 #endif