Gitweb: http://git.kernel.org/linus/3e10e716abf3c71bdb5d86b8f507f9e72236c9cd
Commit: 3e10e716abf3c71bdb5d86b8f507f9e72236c9cd
Parent: 96d07d211739fd2450ac54e81d00fa40fcd4b1bd
Author: Jiri Slaby <jslaby@suse.cz>
AuthorDate: Thu Nov 19 17:16:37 2009 +0100
Committer: Jiri Slaby <jslaby@suse.cz>
CommitDate: Mon Jan 4 11:35:18 2010 +0100
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>
---
include/linux/sched.h | 22 ++++++++++++++++++++++
1 files changed, 22 insertions(+), 0 deletions(-)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index f2f842d..8d4991b 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
--
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