X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=ipc%2Fshm.c;h=0b92e874fc068fb1bc34f3e5940cfb45542f29f7;hb=5be196e5f925dab2309530fabce69c2e562b9791;hp=dca90489e3b0f7b9cfd189b593eeee1d3c0f197e;hpb=f7402dc44d617be807e7184c6c624611b2d35b4e;p=karo-tx-linux.git

diff --git a/ipc/shm.c b/ipc/shm.c
index dca90489e3b0..0b92e874fc06 100644
--- a/ipc/shm.c
+++ b/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);
@@ -157,14 +155,22 @@ static void shm_close (struct vm_area_struct *shmd)
 
 static int shm_mmap(struct file * file, struct vm_area_struct * vma)
 {
-	file_accessed(file);
-	vma->vm_ops = &shm_vm_ops;
-	shm_inc(file->f_dentry->d_inode->i_ino);
-	return 0;
+	int ret;
+
+	ret = shmem_mmap(file, vma);
+	if (ret == 0) {
+		vma->vm_ops = &shm_vm_ops;
+		shm_inc(file->f_dentry->d_inode->i_ino);
+	}
+
+	return ret;
 }
 
 static struct file_operations shm_file_operations = {
-	.mmap	= shm_mmap
+	.mmap	= shm_mmap,
+#ifndef CONFIG_MMU
+	.get_unmapped_area = shmem_get_unmapped_area,
+#endif
 };
 
 static struct vm_operations_struct shm_vm_ops = {
@@ -197,7 +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;
@@ -212,8 +218,16 @@ static int newseg (key_t key, int shmflg, size_t size)
 		file = hugetlb_zero_setup(size);
 		shp->mlock_user = current->user;
 	} else {
+		int acctflag = VM_ACCOUNT;
+		/*
+		 * Do not allow no accounting for OVERCOMMIT_NEVER, even
+	 	 * if it's asked for.
+		 */
+		if  ((shmflg & SHM_NORESERVE) &&
+				sysctl_overcommit_memory != OVERCOMMIT_NEVER)
+			acctflag = 0;
 		sprintf (name, "SYSV%08x", key);
-		file = shmem_file_setup(name, size, VM_ACCOUNT);
+		file = shmem_file_setup(name, size, acctflag);
 	}
 	error = PTR_ERR(file);
 	if (IS_ERR(file))
@@ -233,10 +247,11 @@ static int newseg (key_t key, int shmflg, size_t size)
 	shp->id = shm_buildid(id,shp->shm_perm.seq);
 	shp->shm_file = file;
 	file->f_dentry->d_inode->i_ino = shp->id;
-	if (shmflg & SHM_HUGETLB)
-		set_file_hugepages(file);
-	else
+
+	/* Hugetlb ops would have already been assigned. */
+	if (!(shmflg & SHM_HUGETLB))
 		file->f_op = &shm_file_operations;
+
 	shm_tot += numpages;
 	shm_unlock(shp);
 	return shp->id;
@@ -328,7 +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;
 	    }
@@ -341,7 +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;
 	    }
@@ -543,13 +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);
@@ -588,7 +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);
@@ -627,7 +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;
@@ -760,7 +775,7 @@ invalid:
 		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);
@@ -885,7 +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,