memcg: get rid of swapaccount leftovers

The swapaccount kernel parameter without any values has been removed by
commit a2c8990aed5a ("memsw: remove noswapaccount kernel parameter") but
it seems that we didn't get rid of all the left overs.

Make sure that menuconfig help text and kernel-parameters.txt are clear
about value for the paramter and remove the stalled comment which is not
very much useful on its own.

Signed-off-by: Michal Hocko <mhocko@suse.cz>
Reported-by: Gergely Risko <gergely@risko.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 2 insertions, 3 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 15356aca938c..7f9d4f53882c 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -2953,7 +2953,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                         improve throughput, but will also increase the
                         amount of memory reserved for use by the client.
 
-        swapaccount[=0|1]
+        swapaccount=[0|1]
                         [KNL] Enable accounting of swap in memory resource
                         controller if no parameter or 1 is given or disable
                         it if 0 is given (See Documentation/cgroups/memory.txt)
diff --git a/init/Kconfig b/init/Kconfig
index 247084be0590..fed81b576f29 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -955,7 +955,7 @@ config MEMCG_SWAP_ENABLED
           Memory Resource Controller Swap Extension comes with its price in
           a bigger memory consumption. General purpose distribution kernels
           which want to enable the feature but keep it disabled by default
-          and let the user enable it by swapaccount boot command line
+          and let the user enable it by swapaccount=1 boot command line
           parameter should have this option unselected.
           For those who want to have the feature enabled by default should
           select this option (if, for some reason, they need to disable it
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index c5792a5d87ce..0878ff7c26a9 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -6969,7 +6969,6 @@ struct cgroup_subsys mem_cgroup_subsys = {
 #ifdef CONFIG_MEMCG_SWAP
 static int __init enable_swap_account(char *s)
 {
-        /* consider enabled if no parameter or 1 is given */
         if (!strcmp(s, "1"))
                 really_do_swap_account = 1;
         else if (!strcmp(s, "0"))