[PATCH] ipc: expand shm_flags

Unobfsucate this struct member

Cc: Manfred Spraul <manfred@colorfullife.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

ipc/shm.c

@@ -34,8 +34,6 @@
 
 #include "util.h"
 
-#define shm_flags	shm_perm.mode
-
 static struct file_operations shm_file_operations;
 static struct vm_operations_struct shm_vm_ops;
 
@@ -148,7 +146,7 @@ static void shm_close (struct vm_area_struct *shmd)
 	shp->shm_dtim = get_seconds();
 	shp->shm_nattch--;
 	if(shp->shm_nattch == 0 &&
-	   shp->shm_flags & SHM_DEST)
+	   shp->shm_perm.mode & SHM_DEST)
 		shm_destroy (shp);
 	else
 		shm_unlock(shp);
@@ -205,7 +203,7 @@ static int newseg (key_t key, int shmflg, size_t size)
 		return -ENOMEM;
 
 	shp->shm_perm.key = key;
-	shp->shm_flags = (shmflg & S_IRWXUGO);
+	shp->shm_perm.mode = (shmflg & S_IRWXUGO);
 	shp->mlock_user = NULL;
 
 	shp->shm_perm.security = NULL;
@@ -345,7 +343,7 @@ static inline unsigned long copy_shmid_from_user(struct shm_setbuf *out, void __
 
 		out->uid	= tbuf.shm_perm.uid;
 		out->gid	= tbuf.shm_perm.gid;
-		out->mode	= tbuf.shm_flags;
+		out->mode	= tbuf.shm_perm.mode;
 
 		return 0;
 	    }
@@ -358,7 +356,7 @@ static inline unsigned long copy_shmid_from_user(struct shm_setbuf *out, void __
 
 		out->uid	= tbuf_old.shm_perm.uid;
 		out->gid	= tbuf_old.shm_perm.gid;
-		out->mode	= tbuf_old.shm_flags;
+		out->mode	= tbuf_old.shm_perm.mode;
 
 		return 0;
 	    }
@@ -560,13 +558,13 @@ asmlinkage long sys_shmctl (int shmid, int cmd, struct shmid_ds __user *buf)
 			if (!is_file_hugepages(shp->shm_file)) {
 				err = shmem_lock(shp->shm_file, 1, user);
 				if (!err) {
-					shp->shm_flags |= SHM_LOCKED;
+					shp->shm_perm.mode |= SHM_LOCKED;
 					shp->mlock_user = user;
 				}
 			}
 		} else if (!is_file_hugepages(shp->shm_file)) {
 			shmem_lock(shp->shm_file, 0, shp->mlock_user);
-			shp->shm_flags &= ~SHM_LOCKED;
+			shp->shm_perm.mode &= ~SHM_LOCKED;
 			shp->mlock_user = NULL;
 		}
 		shm_unlock(shp);
@@ -605,7 +603,7 @@ asmlinkage long sys_shmctl (int shmid, int cmd, struct shmid_ds __user *buf)
 			goto out_unlock_up;
 
 		if (shp->shm_nattch){
-			shp->shm_flags |= SHM_DEST;
+			shp->shm_perm.mode |= SHM_DEST;
 			/* Do not find it any more */
 			shp->shm_perm.key = IPC_PRIVATE;
 			shm_unlock(shp);
@@ -644,7 +642,7 @@ asmlinkage long sys_shmctl (int shmid, int cmd, struct shmid_ds __user *buf)
 		
 		shp->shm_perm.uid = setbuf.uid;
 		shp->shm_perm.gid = setbuf.gid;
-		shp->shm_flags = (shp->shm_flags & ~S_IRWXUGO)
+		shp->shm_perm.mode = (shp->shm_perm.mode & ~S_IRWXUGO)
 			| (setbuf.mode & S_IRWXUGO);
 		shp->shm_ctim = get_seconds();
 		break;
@@ -777,7 +775,7 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr)
 		BUG();
 	shp->shm_nattch--;
 	if(shp->shm_nattch == 0 &&
-	   shp->shm_flags & SHM_DEST)
+	   shp->shm_perm.mode & SHM_DEST)
 		shm_destroy (shp);
 	else
 		shm_unlock(shp);
@@ -902,7 +900,7 @@ static int sysvipc_shm_proc_show(struct seq_file *s, void *it)
 	return seq_printf(s, format,
 			  shp->shm_perm.key,
 			  shp->id,
-			  shp->shm_flags,
+			  shp->shm_perm.mode,
 			  shp->shm_segsz,
 			  shp->shm_cprid,
 			  shp->shm_lprid,