From 06ec11b10dfe1560540ed3488d5727d587c3d601 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Thu, 19 Nov 2009 17:16:37 +0100 Subject: [PATCH] resource: add helpers for fetching rlimits commit 3e10e716abf3c71bdb5d86b8f507f9e72236c9cd upstream. 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 Cc: James Morris Cc: Heiko Carstens Cc: Andrew Morton Cc: Ingo Molnar Signed-off-by: Greg Kroah-Hartman --- include/linux/sched.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/include/linux/sched.h b/include/linux/sched.h index d3e910b36c72..338733b03c8f 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -2485,6 +2485,28 @@ static inline void mm_init_owner(struct mm_struct *mm, struct task_struct *p) #define TASK_STATE_TO_CHAR_STR "RSDTtZX" +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 -- 2.39.5