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ipc/sem.c: remove private structures from public header file 

include/linux/sem.h contains several structures that are only used within
ipc/sem.c.

The patch moves them into ipc/sem.c - there is no need to expose the
structures to the whole kernel.

No functional changes, only whitespace cleanups and 80-char per line
fixes.

Signed-off-by: Manfred Spraul <manfred@colorfullife.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Mike Galbraith <efault@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Manfred Spraul 2011-11-02 13:38:54 -07:00 committed by Linus Torvalds
parent 0b0577f608
commit e57940d719
2 changed files with 46 additions and 42 deletions
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42
include/linux/sem.h
View File

@ -83,13 +83,6 @@ struct seminfo {
struct task_struct;
/* One semaphore structure for each semaphore in the system. */
struct sem {
int semval; /* current value */
int sempid; /* pid of last operation */
struct list_head sem_pending; /* pending single-sop operations */
};
/* One sem_array data structure for each set of semaphores in the system. */
struct sem_array {
struct kern_ipc_perm ____cacheline_aligned_in_smp
@ -103,41 +96,6 @@ struct sem_array {
int complex_count; /* pending complex operations */
};
/* One queue for each sleeping process in the system. */
struct sem_queue {
struct list_head simple_list; /* queue of pending operations */
struct list_head list; /* queue of pending operations */
struct task_struct *sleeper; /* this process */
struct sem_undo *undo; /* undo structure */
int pid; /* process id of requesting process */
int status; /* completion status of operation */
struct sembuf *sops; /* array of pending operations */
int nsops; /* number of operations */
int alter; /* does the operation alter the array? */
};
/* Each task has a list of undo requests. They are executed automatically
* when the process exits.
*/
struct sem_undo {
struct list_head list_proc; /* per-process list: all undos from one process. */
/* rcu protected */
struct rcu_head rcu; /* rcu struct for sem_undo() */
struct sem_undo_list *ulp; /* sem_undo_list for the process */
struct list_head list_id; /* per semaphore array list: all undos for one array */
int semid; /* semaphore set identifier */
short * semadj; /* array of adjustments, one per semaphore */
};
/* sem_undo_list controls shared access to the list of sem_undo structures
* that may be shared among all a CLONE_SYSVSEM task group.
*/
struct sem_undo_list {
atomic_t refcnt;
spinlock_t lock;
struct list_head list_proc;
};
struct sysv_sem {
struct sem_undo_list *undo_list;
};

46
ipc/sem.c
View File

@ -90,6 +90,52 @@
#include <asm/uaccess.h>
#include "util.h"
/* One semaphore structure for each semaphore in the system. */
struct sem {
int semval; /* current value */
int sempid; /* pid of last operation */
struct list_head sem_pending; /* pending single-sop operations */
};
/* One queue for each sleeping process in the system. */
struct sem_queue {
struct list_head simple_list; /* queue of pending operations */
struct list_head list; /* queue of pending operations */
struct task_struct *sleeper; /* this process */
struct sem_undo *undo; /* undo structure */
int pid; /* process id of requesting process */
int status; /* completion status of operation */
struct sembuf *sops; /* array of pending operations */
int nsops; /* number of operations */
int alter; /* does *sops alter the array? */
};
/* Each task has a list of undo requests. They are executed automatically
* when the process exits.
*/
struct sem_undo {
struct list_head list_proc; /* per-process list: *
* all undos from one process
* rcu protected */
struct rcu_head rcu; /* rcu struct for sem_undo */
struct sem_undo_list *ulp; /* back ptr to sem_undo_list */
struct list_head list_id; /* per semaphore array list:
* all undos for one array */
int semid; /* semaphore set identifier */
short *semadj; /* array of adjustments */
/* one per semaphore */
};
/* sem_undo_list controls shared access to the list of sem_undo structures
* that may be shared among all a CLONE_SYSVSEM task group.
*/
struct sem_undo_list {
atomic_t refcnt;
spinlock_t lock;
struct list_head list_proc;
};
#define sem_ids(ns) ((ns)->ids[IPC_SEM_IDS])
#define sem_unlock(sma) ipc_unlock(&(sma)->sem_perm)