Messages in this thread Patch in this message | | | Date | Tue, 17 Jan 2006 08:33:11 -0600 | From | Serge Hallyn <> | Subject | RFC [patch 13/34] PID Virtualization Define new task_pid api |
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Actually define the task_pid() and task_tgid() functions. Also replace pid with __pid so as to make sure any missed accessors are caught.
The resulting object code seems to be identical in most cases, and is actually shorter in cases where current->pid is used twice in a row, as it does not dereference task-> twice.
Signed-off-by: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Serge Hallyn <serue@us.ibm.com> --- sched.h | 16 +++++++++++++--- 1 files changed, 13 insertions(+), 3 deletions(-)
Index: linux-2.6.15/include/linux/sched.h =================================================================== --- linux-2.6.15.orig/include/linux/sched.h 2006-01-17 08:18:22.000000000 -0500 +++ linux-2.6.15/include/linux/sched.h 2006-01-17 08:37:03.000000000 -0500 @@ -732,8 +732,8 @@ /* ??? */ unsigned long personality; unsigned did_exec:1; - pid_t pid; - pid_t tgid; + pid_t __pid; + pid_t __tgid; /* * pointers to (original) parent process, youngest child, younger sibling, * older sibling, respectively. (p->father can be replaced with @@ -877,6 +877,16 @@ return p->pids[PIDTYPE_PID].nr != 0; } +static inline pid_t task_pid(const struct task_struct *p) +{ + return p->__pid; +} + +static inline pid_t task_tgid(const struct task_struct *p) +{ + return p->__tgid; +} + extern void free_task(struct task_struct *tsk); extern void __put_task_struct(struct task_struct *tsk); #define get_task_struct(tsk) do { atomic_inc(&(tsk)->usage); } while(0) @@ -1200,7 +1210,7 @@ extern task_t * FASTCALL(next_thread(const task_t *p)); -#define thread_group_leader(p) (p->pid == p->tgid) +#define thread_group_leader(p) (task_pid(p) == task_tgid(p)) static inline int thread_group_empty(task_t *p) { --
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