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authorJiri Slaby <jslaby@suse.cz>2009-11-19 17:16:37 +0100
committerJiri Slaby <jslaby@suse.cz>2010-01-04 11:35:18 +0100
commit3e10e716abf3c71bdb5d86b8f507f9e72236c9cd (patch)
treec0dee002666c9aaf9862f3ec1140c5946461ec54
parent96d07d211739fd2450ac54e81d00fa40fcd4b1bd (diff)
resource: add helpers for fetching rlimits
We want to be sure that compiler fetches the limit variable only once, so add helpers for fetching current and maximal resource limits which do that. Add them to sched.h (instead of resource.h) due to circular dependency sched.h->resource.h->task_struct Alternative would be to create a separate res_access.h or similar. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Cc: James Morris <jmorris@namei.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Ingo Molnar <mingo@elte.hu>
-rw-r--r--include/linux/sched.h22
1 files changed, 22 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h
index f2f842db03c..8d4991be9d5 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -2601,6 +2601,28 @@ static inline void mm_init_owner(struct mm_struct *mm, struct task_struct *p)
}
#endif /* CONFIG_MM_OWNER */
+static inline unsigned long task_rlimit(const struct task_struct *tsk,
+ unsigned int limit)
+{
+ return ACCESS_ONCE(tsk->signal->rlim[limit].rlim_cur);
+}
+
+static inline unsigned long task_rlimit_max(const struct task_struct *tsk,
+ unsigned int limit)
+{
+ return ACCESS_ONCE(tsk->signal->rlim[limit].rlim_max);
+}
+
+static inline unsigned long rlimit(unsigned int limit)
+{
+ return task_rlimit(current, limit);
+}
+
+static inline unsigned long rlimit_max(unsigned int limit)
+{
+ return task_rlimit_max(current, limit);
+}
+
#endif /* __KERNEL__ */
#endif