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author | David Rientjes <rientjes@google.com> | 2014-04-08 00:37:32 +0200 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-08 01:35:54 +0200 |
commit | 539a13b47e462d28c48f076c63871580f694a366 (patch) | |
tree | b0db5d5314b1276d433c3ae826d3a19a8902bec6 | |
parent | mm, mempolicy: remove per-process flag (diff) | |
download | linux-539a13b47e462d28c48f076c63871580f694a366.tar.xz linux-539a13b47e462d28c48f076c63871580f694a366.zip |
res_counter: remove interface for locked charging and uncharging
The res_counter_{charge,uncharge}_locked() variants are not used in the
kernel outside of the resource counter code itself, so remove the
interface.
Signed-off-by: David Rientjes <rientjes@google.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Jianguo Wu <wujianguo@huawei.com>
Cc: Tim Hockin <thockin@google.com>
Cc: Christoph Lameter <cl@linux.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r-- | Documentation/cgroups/resource_counter.txt | 12 | ||||
-rw-r--r-- | include/linux/res_counter.h | 6 | ||||
-rw-r--r-- | kernel/res_counter.c | 23 |
3 files changed, 15 insertions, 26 deletions
diff --git a/Documentation/cgroups/resource_counter.txt b/Documentation/cgroups/resource_counter.txt index 5108afb3645c..762ca54eb929 100644 --- a/Documentation/cgroups/resource_counter.txt +++ b/Documentation/cgroups/resource_counter.txt @@ -76,15 +76,7 @@ to work with it. limit_fail_at parameter is set to the particular res_counter element where the charging failed. - d. int res_counter_charge_locked - (struct res_counter *rc, unsigned long val, bool force) - - The same as res_counter_charge(), but it must not acquire/release the - res_counter->lock internally (it must be called with res_counter->lock - held). The force parameter indicates whether we can bypass the limit. - - e. u64 res_counter_uncharge[_locked] - (struct res_counter *rc, unsigned long val) + d. u64 res_counter_uncharge(struct res_counter *rc, unsigned long val) When a resource is released (freed) it should be de-accounted from the resource counter it was accounted to. This is called @@ -93,7 +85,7 @@ to work with it. The _locked routines imply that the res_counter->lock is taken. - f. u64 res_counter_uncharge_until + e. u64 res_counter_uncharge_until (struct res_counter *rc, struct res_counter *top, unsigned long val) diff --git a/include/linux/res_counter.h b/include/linux/res_counter.h index 201a69749659..56b7bc32db4f 100644 --- a/include/linux/res_counter.h +++ b/include/linux/res_counter.h @@ -104,15 +104,13 @@ void res_counter_init(struct res_counter *counter, struct res_counter *parent); * units, e.g. numbers, bytes, Kbytes, etc * * returns 0 on success and <0 if the counter->usage will exceed the - * counter->limit _locked call expects the counter->lock to be taken + * counter->limit * * charge_nofail works the same, except that it charges the resource * counter unconditionally, and returns < 0 if the after the current * charge we are over limit. */ -int __must_check res_counter_charge_locked(struct res_counter *counter, - unsigned long val, bool force); int __must_check res_counter_charge(struct res_counter *counter, unsigned long val, struct res_counter **limit_fail_at); int res_counter_charge_nofail(struct res_counter *counter, @@ -125,12 +123,10 @@ int res_counter_charge_nofail(struct res_counter *counter, * @val: the amount of the resource * * these calls check for usage underflow and show a warning on the console - * _locked call expects the counter->lock to be taken * * returns the total charges still present in @counter. */ -u64 res_counter_uncharge_locked(struct res_counter *counter, unsigned long val); u64 res_counter_uncharge(struct res_counter *counter, unsigned long val); u64 res_counter_uncharge_until(struct res_counter *counter, diff --git a/kernel/res_counter.c b/kernel/res_counter.c index 4aa8a305aede..51dbac6a3633 100644 --- a/kernel/res_counter.c +++ b/kernel/res_counter.c @@ -22,8 +22,18 @@ void res_counter_init(struct res_counter *counter, struct res_counter *parent) counter->parent = parent; } -int res_counter_charge_locked(struct res_counter *counter, unsigned long val, - bool force) +static u64 res_counter_uncharge_locked(struct res_counter *counter, + unsigned long val) +{ + if (WARN_ON(counter->usage < val)) + val = counter->usage; + + counter->usage -= val; + return counter->usage; +} + +static int res_counter_charge_locked(struct res_counter *counter, + unsigned long val, bool force) { int ret = 0; @@ -86,15 +96,6 @@ int res_counter_charge_nofail(struct res_counter *counter, unsigned long val, return __res_counter_charge(counter, val, limit_fail_at, true); } -u64 res_counter_uncharge_locked(struct res_counter *counter, unsigned long val) -{ - if (WARN_ON(counter->usage < val)) - val = counter->usage; - - counter->usage -= val; - return counter->usage; -} - u64 res_counter_uncharge_until(struct res_counter *counter, struct res_counter *top, unsigned long val) |