These changes are the raw update to linux-4.4.6-rt14. Kernel sources

are taken from kernel.org, and rt patch from the rt wiki download page.

During the rebasing, the following patch collided:

Force tick interrupt and get rid of softirq magic(I70131fb85).

Collisions have been removed because its logic was found on the
source already.

Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>

1 files changed, 5 insertions, 32 deletions

diff --git a/kernel/fs/ufs/super.c b/kernel/fs/ufs/super.c
index dc33f9416..f6390eec0 100644
--- a/kernel/fs/ufs/super.c
+++ b/kernel/fs/ufs/super.c
@@ -80,6 +80,7 @@
 #include <linux/stat.h>
 #include <linux/string.h>
 #include <linux/blkdev.h>
+#include <linux/backing-dev.h>
 #include <linux/init.h>
 #include <linux/parser.h>
 #include <linux/buffer_head.h>
@@ -93,22 +94,6 @@
 #include "swab.h"
 #include "util.h"
 
-void lock_ufs(struct super_block *sb)
-{
-	struct ufs_sb_info *sbi = UFS_SB(sb);
-
-	mutex_lock(&sbi->mutex);
-	sbi->mutex_owner = current;
-}
-
-void unlock_ufs(struct super_block *sb)
-{
-	struct ufs_sb_info *sbi = UFS_SB(sb);
-
-	sbi->mutex_owner = NULL;
-	mutex_unlock(&sbi->mutex);
-}
-
 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
 {
 	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
@@ -693,7 +678,6 @@ static int ufs_sync_fs(struct super_block *sb, int wait)
 	struct ufs_super_block_third * usb3;
 	unsigned flags;
 
-	lock_ufs(sb);
 	mutex_lock(&UFS_SB(sb)->s_lock);
 
 	UFSD("ENTER\n");
@@ -713,7 +697,6 @@ static int ufs_sync_fs(struct super_block *sb, int wait)
 
 	UFSD("EXIT\n");
 	mutex_unlock(&UFS_SB(sb)->s_lock);
-	unlock_ufs(sb);
 
 	return 0;
 }
@@ -757,7 +740,6 @@ static void ufs_put_super(struct super_block *sb)
 
 	ubh_brelse_uspi (sbi->s_uspi);
 	kfree (sbi->s_uspi);
-	mutex_destroy(&sbi->mutex);
 	kfree (sbi);
 	sb->s_fs_info = NULL;
 	UFSD("EXIT\n");
@@ -800,7 +782,6 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 
 	UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
 	
-	mutex_init(&sbi->mutex);
 	mutex_init(&sbi->s_lock);
 	spin_lock_init(&sbi->work_lock);
 	INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
@@ -1256,7 +1237,6 @@ magic_found:
 	return 0;
 
 failed:
-	mutex_destroy(&sbi->mutex);
 	if (ubh)
 		ubh_brelse_uspi (uspi);
 	kfree (uspi);
@@ -1279,7 +1259,6 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
 	unsigned flags;
 
 	sync_filesystem(sb);
-	lock_ufs(sb);
 	mutex_lock(&UFS_SB(sb)->s_lock);
 	uspi = UFS_SB(sb)->s_uspi;
 	flags = UFS_SB(sb)->s_flags;
@@ -1295,7 +1274,6 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
 	ufs_set_opt (new_mount_opt, ONERROR_LOCK);
 	if (!ufs_parse_options (data, &new_mount_opt)) {
 		mutex_unlock(&UFS_SB(sb)->s_lock);
-		unlock_ufs(sb);
 		return -EINVAL;
 	}
 	if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
@@ -1303,14 +1281,12 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
 	} else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
 		pr_err("ufstype can't be changed during remount\n");
 		mutex_unlock(&UFS_SB(sb)->s_lock);
-		unlock_ufs(sb);
 		return -EINVAL;
 	}
 
 	if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
 		UFS_SB(sb)->s_mount_opt = new_mount_opt;
 		mutex_unlock(&UFS_SB(sb)->s_lock);
-		unlock_ufs(sb);
 		return 0;
 	}
 	
@@ -1334,7 +1310,6 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
 #ifndef CONFIG_UFS_FS_WRITE
 		pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
 		mutex_unlock(&UFS_SB(sb)->s_lock);
-		unlock_ufs(sb);
 		return -EINVAL;
 #else
 		if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 
@@ -1344,13 +1319,11 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
 		    ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
 			pr_err("this ufstype is read-only supported\n");
 			mutex_unlock(&UFS_SB(sb)->s_lock);
-			unlock_ufs(sb);
 			return -EINVAL;
 		}
 		if (!ufs_read_cylinder_structures(sb)) {
 			pr_err("failed during remounting\n");
 			mutex_unlock(&UFS_SB(sb)->s_lock);
-			unlock_ufs(sb);
 			return -EPERM;
 		}
 		sb->s_flags &= ~MS_RDONLY;
@@ -1358,7 +1331,6 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
 	}
 	UFS_SB(sb)->s_mount_opt = new_mount_opt;
 	mutex_unlock(&UFS_SB(sb)->s_lock);
-	unlock_ufs(sb);
 	return 0;
 }
 
@@ -1390,8 +1362,7 @@ static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
 	struct ufs_super_block_third *usb3;
 	u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
 
-	lock_ufs(sb);
-
+	mutex_lock(&UFS_SB(sb)->s_lock);
 	usb3 = ubh_get_usb_third(uspi);
 	
 	if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
@@ -1412,7 +1383,7 @@ static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
 	buf->f_fsid.val[0] = (u32)id;
 	buf->f_fsid.val[1] = (u32)(id >> 32);
 
-	unlock_ufs(sb);
+	mutex_unlock(&UFS_SB(sb)->s_lock);
 
 	return 0;
 }
@@ -1428,6 +1399,8 @@ static struct inode *ufs_alloc_inode(struct super_block *sb)
 		return NULL;
 
 	ei->vfs_inode.i_version = 1;
+	seqlock_init(&ei->meta_lock);
+	mutex_init(&ei->truncate_mutex);
 	return &ei->vfs_inode;
 }