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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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30
ipc/shm.c
View File

@@ -30,6 +30,7 @@
#include <linux/capability.h>
#include <linux/ptrace.h>
#include <linux/seq_file.h>
#include <linux/mutex.h>
#include <asm/uaccess.h>
@@ -109,7 +110,7 @@ static void shm_open (struct vm_area_struct *shmd)
*
* @shp: struct to free
*
* It has to be called with shp and shm_ids.sem locked,
* It has to be called with shp and shm_ids.mutex locked,
* but returns with shp unlocked and freed.
*/
static void shm_destroy (struct shmid_kernel *shp)
@@ -139,7 +140,7 @@ static void shm_close (struct vm_area_struct *shmd)
int id = file->f_dentry->d_inode->i_ino;
struct shmid_kernel *shp;
down (&shm_ids.sem);
mutex_lock(&shm_ids.mutex);
/* remove from the list of attaches of the shm segment */
if(!(shp = shm_lock(id)))
BUG();
@@ -151,7 +152,7 @@ static void shm_close (struct vm_area_struct *shmd)
shm_destroy (shp);
else
shm_unlock(shp);
up (&shm_ids.sem);
mutex_unlock(&shm_ids.mutex);
}
static int shm_mmap(struct file * file, struct vm_area_struct * vma)
@@ -270,7 +271,7 @@ asmlinkage long sys_shmget (key_t key, size_t size, int shmflg)
struct shmid_kernel *shp;
int err, id = 0;
down(&shm_ids.sem);
mutex_lock(&shm_ids.mutex);
if (key == IPC_PRIVATE) {
err = newseg(key, shmflg, size);
} else if ((id = ipc_findkey(&shm_ids, key)) == -1) {
@@ -296,7 +297,7 @@ asmlinkage long sys_shmget (key_t key, size_t size, int shmflg)
}
shm_unlock(shp);
}
up(&shm_ids.sem);
mutex_unlock(&shm_ids.mutex);
return err;
}
@@ -467,14 +468,14 @@ asmlinkage long sys_shmctl (int shmid, int cmd, struct shmid_ds __user *buf)
return err;
memset(&shm_info,0,sizeof(shm_info));
down(&shm_ids.sem);
mutex_lock(&shm_ids.mutex);
shm_info.used_ids = shm_ids.in_use;
shm_get_stat (&shm_info.shm_rss, &shm_info.shm_swp);
shm_info.shm_tot = shm_tot;
shm_info.swap_attempts = 0;
shm_info.swap_successes = 0;
err = shm_ids.max_id;
up(&shm_ids.sem);
mutex_unlock(&shm_ids.mutex);
if(copy_to_user (buf, &shm_info, sizeof(shm_info))) {
err = -EFAULT;
goto out;
@@ -583,7 +584,7 @@ asmlinkage long sys_shmctl (int shmid, int cmd, struct shmid_ds __user *buf)
* Instead we set a destroyed flag, and then blow
* the name away when the usage hits zero.
*/
down(&shm_ids.sem);
mutex_lock(&shm_ids.mutex);
shp = shm_lock(shmid);
err = -EINVAL;
if (shp == NULL)
@@ -610,7 +611,7 @@ asmlinkage long sys_shmctl (int shmid, int cmd, struct shmid_ds __user *buf)
shm_unlock(shp);
} else
shm_destroy (shp);
up(&shm_ids.sem);
mutex_unlock(&shm_ids.mutex);
goto out;
}
@@ -620,12 +621,13 @@ asmlinkage long sys_shmctl (int shmid, int cmd, struct shmid_ds __user *buf)
err = -EFAULT;
goto out;
}
down(&shm_ids.sem);
mutex_lock(&shm_ids.mutex);
shp = shm_lock(shmid);
err=-EINVAL;
if(shp==NULL)
goto out_up;
if ((err = audit_ipc_perms(0, setbuf.uid, setbuf.gid, setbuf.mode, &(shp->shm_perm))))
if ((err = audit_ipc_perms(0, setbuf.uid, setbuf.gid,
setbuf.mode, &(shp->shm_perm))))
goto out_unlock_up;
err = shm_checkid(shp,shmid);
if(err)
@@ -658,7 +660,7 @@ asmlinkage long sys_shmctl (int shmid, int cmd, struct shmid_ds __user *buf)
out_unlock_up:
shm_unlock(shp);
out_up:
up(&shm_ids.sem);
mutex_unlock(&shm_ids.mutex);
goto out;
out_unlock:
shm_unlock(shp);
@@ -771,7 +773,7 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr)
invalid:
up_write(&current->mm->mmap_sem);
down (&shm_ids.sem);
mutex_lock(&shm_ids.mutex);
if(!(shp = shm_lock(shmid)))
BUG();
shp->shm_nattch--;
@@ -780,7 +782,7 @@ invalid:
shm_destroy (shp);
else
shm_unlock(shp);
up (&shm_ids.sem);
mutex_unlock(&shm_ids.mutex);
*raddr = (unsigned long) user_addr;
err = 0;