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[PATCH] sem2mutex: ipc, id.sem

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Semaphore to mutex conversion.

The conversion was generated via scripts, and the result was validated
automatically via a script as well.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Manfred Spraul <manfred@colorfullife.com>
Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ingo Molnar
2006-03-26 01:37:17 -08:00
committed by Linus Torvalds
parent 14cc3e2b63
commit 5f921ae96f
7 changed files with 65 additions and 56 deletions
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34
ipc/sem.c
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@@ -75,6 +75,8 @@
#include <linux/audit.h>
#include <linux/capability.h>
#include <linux/seq_file.h>
#include <linux/mutex.h>
#include <asm/uaccess.h>
#include "util.h"
@@ -139,7 +141,7 @@ void __init sem_init (void)
* * if it's IN_WAKEUP, then it must wait until the value changes
* * if it's not -EINTR, then the operation was completed by
* update_queue. semtimedop can return queue.status without
* performing any operation on the semaphore array.
* performing any operation on the sem array.
* * otherwise it must acquire the spinlock and check what's up.
*
* The two-stage algorithm is necessary to protect against the following
@@ -214,7 +216,7 @@ asmlinkage long sys_semget (key_t key, int nsems, int semflg)
if (nsems < 0 || nsems > sc_semmsl)
return -EINVAL;
down(&sem_ids.sem);
mutex_lock(&sem_ids.mutex);
if (key == IPC_PRIVATE) {
err = newary(key, nsems, semflg);
@@ -242,7 +244,7 @@ asmlinkage long sys_semget (key_t key, int nsems, int semflg)
sem_unlock(sma);
}
up(&sem_ids.sem);
mutex_unlock(&sem_ids.mutex);
return err;
}
@@ -437,8 +439,8 @@ static int count_semzcnt (struct sem_array * sma, ushort semnum)
return semzcnt;
}
/* Free a semaphore set. freeary() is called with sem_ids.sem down and
* the spinlock for this semaphore set hold. sem_ids.sem remains locked
/* Free a semaphore set. freeary() is called with sem_ids.mutex locked and
* the spinlock for this semaphore set hold. sem_ids.mutex remains locked
* on exit.
*/
static void freeary (struct sem_array *sma, int id)
@@ -525,7 +527,7 @@ static int semctl_nolock(int semid, int semnum, int cmd, int version, union semu
seminfo.semmnu = SEMMNU;
seminfo.semmap = SEMMAP;
seminfo.semume = SEMUME;
down(&sem_ids.sem);
mutex_lock(&sem_ids.mutex);
if (cmd == SEM_INFO) {
seminfo.semusz = sem_ids.in_use;
seminfo.semaem = used_sems;
@@ -534,7 +536,7 @@ static int semctl_nolock(int semid, int semnum, int cmd, int version, union semu
seminfo.semaem = SEMAEM;
}
max_id = sem_ids.max_id;
up(&sem_ids.sem);
mutex_unlock(&sem_ids.mutex);
if (copy_to_user (arg.__buf, &seminfo, sizeof(struct seminfo)))
return -EFAULT;
return (max_id < 0) ? 0: max_id;
@@ -885,9 +887,9 @@ asmlinkage long sys_semctl (int semid, int semnum, int cmd, union semun arg)
return err;
case IPC_RMID:
case IPC_SET:
down(&sem_ids.sem);
mutex_lock(&sem_ids.mutex);
err = semctl_down(semid,semnum,cmd,version,arg);
up(&sem_ids.sem);
mutex_unlock(&sem_ids.mutex);
return err;
default:
return -EINVAL;
@@ -1299,9 +1301,9 @@ found:
/* perform adjustments registered in u */
nsems = sma->sem_nsems;
for (i = 0; i < nsems; i++) {
struct sem * sem = &sma->sem_base[i];
struct sem * semaphore = &sma->sem_base[i];
if (u->semadj[i]) {
sem->semval += u->semadj[i];
semaphore->semval += u->semadj[i];
/*
* Range checks of the new semaphore value,
* not defined by sus:
@@ -1315,11 +1317,11 @@ found:
*
* Manfred <manfred@colorfullife.com>
*/
if (sem->semval < 0)
sem->semval = 0;
if (sem->semval > SEMVMX)
sem->semval = SEMVMX;
sem->sempid = current->tgid;
if (semaphore->semval < 0)
semaphore->semval = 0;
if (semaphore->semval > SEMVMX)
semaphore->semval = SEMVMX;
semaphore->sempid = current->tgid;
}
}
sma->sem_otime = get_seconds();