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authorPavel Emelyanov <xemul@openvz.org>2008-07-25 01:46:55 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-25 10:53:35 -0700
commitf2992db2a4f7ae10f61d5bc68c7c1528cec639e2 (patch)
treea21366b27d11dbaef7aa810d50a935ef08538813
parent7e9abd89cbdf9b73d327d8173343abce9022609b (diff)
Mark res_counter_charge(_locked) with __must_check
Ignoring their return values may result in counter underflow in the future - when the value charged will be uncharged (or in "leaks" - when the value is not uncharged). This also prevents from using charging routines to decrement the counter value (i.e. uncharge it) ;) (Current code works OK with res_counter, however :) ) Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Cc: Balbir Singh <balbir@linux.vnet.ibm.com> Cc: Paul Menage <menage@google.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--include/linux/res_counter.h6
1 files changed, 4 insertions, 2 deletions
diff --git a/include/linux/res_counter.h b/include/linux/res_counter.h
index 6d9e1fca098..125660e7793 100644
--- a/include/linux/res_counter.h
+++ b/include/linux/res_counter.h
@@ -95,8 +95,10 @@ void res_counter_init(struct res_counter *counter);
* counter->limit _locked call expects the counter->lock to be taken
*/
-int res_counter_charge_locked(struct res_counter *counter, unsigned long val);
-int res_counter_charge(struct res_counter *counter, unsigned long val);
+int __must_check res_counter_charge_locked(struct res_counter *counter,
+ unsigned long val);
+int __must_check res_counter_charge(struct res_counter *counter,
+ unsigned long val);
/*
* uncharge - tell that some portion of the resource is released